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The American mink (''Neogale vison'') is a semiaquatic species of
mustelid The Mustelidae (; from Latin ''mustela'', weasel) are a family of carnivorous mammals, including weasels, badgers, otters, ferrets, martens, minks and wolverines, among others. Mustelids () are a diverse group and form the largest family ...
native to North America, though human intervention has expanded its range to many parts of
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...
,
Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an are ...
and
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...
. Because of range expansion, the American mink is classed as a
least-concern species A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...
by the IUCN. The American mink was formerly thought to be the only extant member of the
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
''
Neovison ''Neogale'' is a genus of mustelid native to the Americas, ranging from Alaska south to Bolivia. Members of this genus are known as New World weasels. Taxonomy Members in this genus were formerly classified into the genera '' Mustela'' and ' ...
'' following the extinction of the
sea mink The sea mink (''Neogale macrodon'') is a recently extinct species of mink that lived on the eastern coast of North America around the Gulf of Maine on the New England seaboard. It was most closely related to the American mink (''Neogale vison' ...
(''N. macrodon''), but recent studies, followed by taxonomic authorities, have reclassified it and the sea mink within the genus ''
Neogale ''Neogale'' is a genus of mustelid native to the Americas, ranging from Alaska south to Bolivia. Members of this genus are known as New World weasels. Taxonomy Members in this genus were formerly classified into the genera '' Mustela'' and '' ...
'', which also contains a few New World
weasel Weasels are mammals of the genus ''Mustela'' of the family Mustelidae. The genus ''Mustela'' includes the least weasels, polecats, stoats, ferrets and European mink. Members of this genus are small, active predators, with long and slender b ...
species. The American mink is a
carnivore A carnivore , or meat-eater (Latin, ''caro'', genitive ''carnis'', meaning meat or "flesh" and ''vorare'' meaning "to devour"), is an animal or plant whose food and energy requirements derive from animal tissues (mainly muscle, fat and other s ...
that feeds on rodents, fish, crustaceans, frogs, and birds. In its introduced range in Europe it has been classified as an invasive species linked to declines in
European mink The European mink (''Mustela lutreola''), also known as the Russian mink and Eurasian mink, is a semiaquatic species of mustelid native to Europe. It is similar in colour to the American mink, but is slightly smaller and has a less specialized ...
,
Pyrenean desman The Pyrenean desman also called Iberian desman (''Galemys pyrenaicus'') is a small semiaquatic, globally threatened mammal related to moles and shrews, and, along with the Russian desman (''Desmana moschata''), is one of the two extant members ...
, and water vole populations. It is the animal most frequently farmed for its fur, exceeding the silver fox, sable, marten, and skunk in economic importance.


Indigenous names

* Abenaki language ** abe, mosbas **
Penobscot The Penobscot (Abenaki: ''Pαnawάhpskewi'') are an Indigenous people in North America from the Northeastern Woodlands region. They are organized as a federally recognized tribe in Maine and as a First Nations band government in the Atlantic ...
: * akz, sakihpa * ale, ilgitux̂ * arp, no'eihi' * ari, eérux * asb, íkusana * bla, aapssiiyai'kayi or * chr, svki * cic, okfincha * chp, tthełjus * coo, qayχ * cr, sâkwes ** crk, sâkwês, script=Latn ** csw, šâkwêšiw, script=Latn ** crm, shakweshiw, script=Latn ** nsk, achikaas, script=Latn ** moe, atshakash, script=Latn ** James Bay Cree: * cro, baapúxtakbialee *
Dakelh The Dakelh (pronounced ) or Carrier are the indigenous people of a large portion of the Central Interior of British Columbia, Canada. The "Carrier" name was derived from an English translation of ''Aghele'', the name from the neighbouring Sekani ...
** Nadleh Whut'en: ** Nak'azdli: * bea, taadle *
Delaware Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent Del ...
** umu, wiiníingwus ** unm, wininkwës * git, lis'in *
Halkomelem Halkomelem (; in the Upriver dialect, in the Island dialect, and in the Downriver dialect) is a language of various First Nations peoples of the British Columbia Coast. It is spoken in what is now British Columbia, ranging from southeastern ...
** Hul'q'umi'num: ** Halqeméylem: * hei, kvənn̓à ** Haíɫzaqv: * hid, nagcúa * win, jająksík * kkz, tets'ūtl'ęhį̄ * cku, sa•kih•pa * kut, ʔinuya * kwk, ma̱tsa * lkt, ikhúsą * lil, t̓sexyátsen * lut, c̓əbál̓qid or * pqm, ciyahkehs * mez, sāhkih * mia, šinkohsa * mic, mujpej * ncg, lisy̓een * Nishnaabemwin: *
Nlaka'pamuctsin The Thompson language, properly known as Nlaka'pamuctsin, also known as the Nlaka'pamux ('Nthlakampx') language, is an Interior Salishan language spoken in the Fraser Canyon, Thompson Canyon, Nicola Country of the Canadian province of British C ...
: * blc, t'uka *
Nuu-chah-nulth The Nuu-chah-nulth (; Nuučaan̓uł: ), also formerly referred to as the Nootka, Nutka, Aht, Nuuchahnulth or Tahkaht, are one of the indigenous peoples of the Pacific Northwest Coast in Canada. The term Nuu-chah-nulth is used to describe fifte ...
** Ehattesaht: ** Tseshaht: * oj, zhaangweshi * oka, c̓x̌licn * oma, íki skă * one, shotsya·káweˀ * pot, wnepshkwé *
Salish Salish () may refer to: * Salish peoples, a group of First Nations/Native Americans ** Coast Salish peoples, several First Nations/Native American groups in the coastal regions of the Pacific Northwest ** Interior Salish peoples, several First Nat ...
: *
SENĆOŦEN Saanich (also Sənčáθən, written as in Saanich orthography and pronounced ) is the language of the First Nations Saanich people in the Pacific Northwest region of northwestern North America. Saanich is a Coast Salishan language in the North ...
: * Shashishalhem: * Secwepemc: * Sm'álgyax: * tus, θenę́·ku·t * Tse'khene: * uma, kuucpúu * Witsuwittʼen:


Evolution

As a species, the American mink represents a more specialized form than the European mink in the direction of
carnivory A carnivore , or meat-eater (Latin, ''caro'', genitive ''carnis'', meaning meat or "flesh" and ''vorare'' meaning "to devour"), is an animal or plant whose food and energy requirements derive from animal tissues (mainly muscle, adipose tissue, f ...
, as indicated by the more developed structure of the skull.
Fossil record A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...
s of the American mink go back as far as the
Irvingtonian The Irvingtonian North American Land Mammal Age on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), spanning from 1.9 million – 250,000 years BP. ...
, though the species is uncommon among
Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
animals. Its fossil range corresponds with the species' current natural range. The American minks of the Pleistocene did not differ much in size or morphology from modern populations, though a slight trend toward increased size is apparent from the Irvingtonian through to the
Illinoian The Illinoian Stage is the name used by Quaternary geologists in North America to designate the period c.191,000 to c.130,000 years ago, during the middle Pleistocene, when sediments comprising the Illinoian Glacial Lobe were deposited. It precedes ...
and
Wisconsinan The Wisconsin Glacial Episode, also called the Wisconsin glaciation, was the most recent glacial period of the North American ice sheet complex. This advance included the Cordilleran Ice Sheet, which nucleated in the northern North American Cor ...
periods. Although superficially similar to the European mink, studies indicate the European mink's closest relative is the
Siberian weasel The Siberian weasel or kolonok (''Mustela sibirica''), is a medium-sized weasel native to Asia, where it is widely distributed and inhabits various forest habitats and open areas. It is therefore listed as Least Concern on the IUCN Red List. Desc ...
(''kolonok'') of Asia. The American mink has been recorded to
hybrid Hybrid may refer to: Science * Hybrid (biology), an offspring resulting from cross-breeding ** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species ** Hybridity, the property of a hybrid plant which is a union of two dif ...
ize with European minks and
polecat Polecat is a common name for several mustelid species in the order Carnivora and subfamilies Ictonychinae and Mustelinae. Polecats do not form a single taxonomic rank (i.e. clade). The name is applied to several species with broad similarities t ...
s in captivity, though the hybrid embryos of the American and European minks are usually reabsorbed.


Subspecies

, 15 subspecies are recognised.


Description


Build

The American mink differs from members of the genus '' Mustela'' (
stoat The stoat (''Mustela erminea''), also known as the Eurasian ermine, Beringian ermine and ermine, is a mustelid native to Eurasia and the northern portions of North America. Because of its wide circumpolar distribution, it is listed as Least Conc ...
s and
weasel Weasels are mammals of the genus ''Mustela'' of the family Mustelidae. The genus ''Mustela'' includes the least weasels, polecats, stoats, ferrets and European mink. Members of this genus are small, active predators, with long and slender bo ...
s), as well as the other members of ''
Neogale ''Neogale'' is a genus of mustelid native to the Americas, ranging from Alaska south to Bolivia. Members of this genus are known as New World weasels. Taxonomy Members in this genus were formerly classified into the genera '' Mustela'' and '' ...
'', by its larger size and stouter form, which closely approach those of martens. It shares with martens a uniformly enlarged, bushy and somewhat tapering tail, rather than a slender, cylindrical tail with an enlarged bushy tip, as is the case in stoats. The American mink is similar in build to the
European mink The European mink (''Mustela lutreola''), also known as the Russian mink and Eurasian mink, is a semiaquatic species of mustelid native to Europe. It is similar in colour to the American mink, but is slightly smaller and has a less specialized ...
, but the tail is longer (constituting 38–51% of its body length). The American mink has a long body, which allows the species to enter the burrows of prey. Its
streamlined Streamlines, streaklines and pathlines are field lines in a fluid flow. They differ only when the flow changes with time, that is, when the flow is not steady. Considering a velocity vector field in three-dimensional space in the framework of ...
shape helps it to reduce water resistance whilst swimming. The skull is similar to that of the European mink, but is more massive, narrower, and less elongated, with more strongly developed projections and a wider, shorter
cranium The skull is a bone protective cavity for the brain. The skull is composed of four types of bone i.e., cranial bones, facial bones, ear ossicles and hyoid bone. However two parts are more prominent: the cranium and the mandible. In humans, the ...
. The upper molars are larger and more massive than those of the European mink. The
dental formula Dentition pertains to the development of teeth and their arrangement in the mouth. In particular, it is the characteristic arrangement, kind, and number of teeth in a given species at a given age. That is, the number, type, and morpho-physiolo ...
is . Domestic mink, which are bred in fur farms and are substandard genetically, have 19.6% smaller brains, 8.1% smaller hearts, and 28.2% smaller spleens than wild mink. The feet are broad, with webbed digits. They generally have eight
nipple The nipple is a raised region of tissue on the surface of the breast from which, in females, milk leaves the breast through the lactiferous ducts to feed an infant. The milk can flow through the nipple passively or it can be ejected by smooth mu ...
s, with one pair of inguinal teats and three pairs of abdominal teats. The adult male's
penis A penis (plural ''penises'' or ''penes'' () is the primary sexual organ that male animals use to inseminate females (or hermaphrodites) during copulation. Such organs occur in many animals, both vertebrate and invertebrate, but males do n ...
is long, and is covered by a sheath. The
baculum The baculum (also penis bone, penile bone, or ''os penis'', ''os genitale'' or ''os priapi'') is a bone found in the penis of many placental mammals. It is absent from the human penis, but present in the penises of some primates, such as the ...
is well-developed, being triangular in
cross section Cross section may refer to: * Cross section (geometry) ** Cross-sectional views in architecture & engineering 3D *Cross section (geology) * Cross section (electronics) * Radar cross section, measure of detectability * Cross section (physics) **Abs ...
and curved at the tip. Males measure in body length, while females measure . The tail measures in males and in females. Weights vary with sex and season, with males being heavier than females. In winter, males weigh and females . Maximum heaviness occurs in autumn.


Fur

The American mink's winter fur is denser, longer, softer, and more close-fitting than that of the European mink. The winter fur's tone is generally very dark blackish-tawny to light-tawny. Colour is evenly distributed over all the body, with the under side being only slightly lighter than the back. The
guard hair Guard hair or overhair is the outer layer of hair of most mammals, which overlay the fur. Guard hairs are long and coarse and protect the rest of the pelage (fur) from abrasion and frequently from moisture. They are visible on the surface of the fu ...
s are bright and dark-tawny, often approaching black on the spine. The underfur on the back is very wavy and greyish-tawny with a bluish tint. The tail is darker than the trunk and sometimes becomes pure black on the tip. The chin and lower lip are white. Captive individuals tend to develop irregular white patches on the lower surface of their bodies, though escaped individuals from
Tartaria Tartary ( la, Tartaria, french: Tartarie, german: Tartarei, russian: Тартария, Tartariya) or Tatary (russian: Татария, Tatariya) was a blanket term used in Western European literature and cartography for a vast part of Asia bound ...
gradually lost these patches. The summer fur is generally shorter, sparser and duller than the winter fur. The thick underfur and oily guard hairs render the pelage water-resistant, with the length of the guard hairs being intermediate between those of
otter Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic, or marine, with diets based on fish and invertebrates. Lutrinae is a branch of the Mustelidae family, which also includes wea ...
s and
polecats Polecat is a common name for several mustelid species in the order Carnivora and subfamilies Ictonychinae and Mustelinae. Polecats do not form a single taxonomic rank (i.e. clade). The name is applied to several species with broad similarities t ...
, thus indicating the American mink is incompletely adapted to an aquatic life. It moults twice a year, during spring and autumn. It does not turn white in winter. A variety of different colour mutations have arisen from experimental breeding on fur farms.


Locomotion

On land, the American mink moves by a bounding gait, with speeds of up to . It also climbs trees and swims well. During swimming, the mink propels itself primarily through undulating movements of the trunk. When
diving Diving most often refers to: * Diving (sport), the sport of jumping into deep water * Underwater diving, human activity underwater for recreational or occupational purposes Diving or Dive may also refer to: Sports * Dive (American football), a ...
, it undergoes
bradycardia Bradycardia (also sinus bradycardia) is a slow resting heart rate, commonly under 60 beats per minute (BPM) as determined by an electrocardiogram. It is considered to be a normal heart rate during sleep, in young and healthy or elderly adults, a ...
, which is likely an adaptation to conserve
oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as wel ...
. In warm water (), the American mink can swim for three hours without stopping, but in cold water it can die within 27 minutes. It generally dives to depths of for 10 seconds, though depths of 3 m lasting 60 seconds have been recorded. It typically catches fish after five- to 20-second chases.


Senses and scent glands

The American mink relies heavily on
sight Visual perception is the ability to interpret the surrounding Biophysical environment, environment through photopic vision (daytime vision), color vision, scotopic vision (night vision), and mesopic vision (twilight vision), using light in the ...
when foraging. Its
eyesight Visual perception is the ability to interpret the surrounding environment through photopic vision (daytime vision), color vision, scotopic vision (night vision), and mesopic vision (twilight vision), using light in the visible spectrum reflecte ...
is clearer on land than underwater. Its auditory perception is high enough to detect the
ultrasonic Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. This limit varies fr ...
vocalisations (1–16
kHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that on ...
) of rodent prey. Its sense of smell is comparatively weak. Its two
anal gland Anal may refer to: Related to the anus *Related to the anus of animals: ** Anal fin, in fish anatomy ** Anal vein, in insect anatomy ** Anal scale, in reptile anatomy *Related to the human anus: ** Anal sex, a type of sexual activity involving s ...
s are used for
scent marking In ethology, territory is the sociographical area that an animal consistently defends against conspecific competition (or, occasionally, against animals of other species) using agonistic behaviors or (less commonly) real physical aggression. ...
, either through defecation or by rubbing the anal region on the ground. The secretions of the anal glands are composed of 2,2- dimethyl
thietane Thietane is a heterocyclic compound containing a saturated four-membered ring with three carbon atoms and one sulfur atom. Thietane, and its derivative 2-propylthietane, are strong-smelling mouse alarm pheromones and predator scent analogues. Bo ...
, 2- ethylthietane, cyclic
disulfide In biochemistry, a disulfide (or disulphide in British English) refers to a functional group with the structure . The linkage is also called an SS-bond or sometimes a disulfide bridge and is usually derived by the coupling of two thiol groups. In ...
, 3,3-dimethyl-1,2-dithiacyclopentane, and
indole Indole is an aromatic heterocyclic organic compound with the formula C8 H7 N. It has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered pyrrole ring. Indole is widely distributed in the natural environmen ...
. When stressed, the American mink can expel the contents of its anal glands at a distance of . Scent glands may also be located on the throat and chest. The smell produced by these scent glands was described by
Clinton Hart Merriam Clinton Hart Merriam (December 5, 1855 – March 19, 1942) was an American zoologist, mammalogist, ornithologist, entomologist, ecologist, ethnographer, geographer, naturalist and physician. He was commonly known as the 'father of mammalogy', a ...
as more unbearable than that produced by skunks, and added it was "one of the few substances, of animal, vegetable, or mineral origin, that has, on land or sea, rendered me aware of the existence of the abominable sensation called
nausea Nausea is a diffuse sensation of unease and discomfort, sometimes perceived as an urge to vomit. While not painful, it can be a debilitating symptom if prolonged and has been described as placing discomfort on the chest, abdomen, or back of the ...
".


Behaviour


Social and territorial behaviours

American mink territories are held by individual animals with minimal intrasex overlap, but with extensive overlap between animals of the opposite sex. Most territories are in undisturbed, rocky coastal habitats with broad
littoral zone The littoral zone or nearshore is the part of a sea, lake, or river that is close to the shore. In coastal ecology, the littoral zone includes the intertidal zone extending from the high water mark (which is rarely inundated), to coastal areas ...
s and dense cover. Some are on estuaries, rivers and canals near urban areas. Home ranges are typically long, with male territories larger than females'. As long as it is close to water, the American mink is not fussy about its choice of den. Mink dens typically consist of long burrows in river banks, holes under
log Log most often refers to: * Trunk (botany), the stem and main wooden axis of a tree, called logs when cut ** Logging, cutting down trees for logs ** Firewood, logs used for fuel ** Lumber or timber, converted from wood logs * Logarithm, in mathe ...
s,
tree stump After a tree has been cut and felled, the stump or tree stump is usually a small remaining portion of the trunk with the roots still in the ground. Stumps may show the age-defining rings of a tree. The study of these rings is known as dendrochrono ...
s, or
root In vascular plants, the roots are the organs of a plant that are modified to provide anchorage for the plant and take in water and nutrients into the plant body, which allows plants to grow taller and faster. They are most often below the sur ...
s and hollow
tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...
s, though dens located in rock crevices, drains, and nooks under stone piles and bridges are occasionally selected. The burrows they dig themselves are typically about four inches in diameter and may continue along for at a depth of . The American mink may nest in burrows dug previously by
muskrat The muskrat (''Ondatra zibethicus'') is a medium-sized semiaquatic rodent native to North America and an introduced species in parts of Europe, Asia, and South America. The muskrat is found in wetlands over a wide range of climates and habitat ...
s,
badger Badgers are short-legged omnivores in the family Mustelidae (which also includes the otters, wolverines, martens, minks, polecats, weasels, and ferrets). Badgers are a polyphyletic rather than a natural taxonomic grouping, being united b ...
s and skunks, and may also dig dens in old ant hills. The nesting chamber is at the end of a four-inch tunnel, and is about a foot in diameter. It is warm, dry, and lined with straw and feathers. The American mink's dens are characterized by a large number of entrances and twisting passages. The number of exits varies from one to eight. The American mink normally only vocalises during close encounters with other minks or predators. The sounds it emits include piercing shrieks and hisses when threatened and muffled chuckling sounds when mating. Kits squeak repeatedly when separated from their mothers.
Ernest Thompson Seton Ernest Thompson Seton (born Ernest Evan Thompson August 14, 1860 – October 23, 1946) was an English-born Canadian-American author, wildlife artist, founder of the Woodcraft Indians in 1902 (renamed Woodcraft League of America), and one of ...
reported hearing minks growl and snarl when confronting a threat. During aggressive interactions, mink assert their dominance by arching their backs, puffing up, lashing out their tails, and stomping and scraping the ground with their feet, while also opening their mouth in a threat-gape. Should this be unsuccessful, fights may result, with injuries to the head and neck.


Reproduction and development

The American mink is a promiscuous animal that does not form
pair bond In biology, a pair bond is the strong affinity that develops in some species between a mating pair, often leading to the production and rearing of offspring and potentially a lifelong bond. Pair-bonding is a term coined in the 1940s that is freque ...
s. The start of
mating season Seasonal breeders are animal species that successfully mate only during certain times of the year. These times of year allow for the optimization of survival of young due to factors such as ambient temperature, food and water availability, and cha ...
ranges from February in its southern range to April in the north. In its introduced range, the American mink breeds one month earlier than the European mink. Males commonly fight during the mating season, which may result in the formation of loose, temporary dominance hierarchies governing access to receptive females. The mating season lasts for three weeks, with
ovulation Ovulation is the release of eggs from the ovaries. In women, this event occurs when the ovarian follicles rupture and release the secondary oocyte ovarian cells. After ovulation, during the luteal phase, the egg will be available to be fertilized ...
being induced by the presence of males. The mating process is violent, with the male typically biting the female on the nape of the neck and pinning her with his forefeet.
Mating In biology, mating is the pairing of either opposite-sex or hermaphroditic organisms for the purposes of sexual reproduction. ''Fertilization'' is the fusion of two gametes. ''Copulation'' is the union of the sex organs of two sexually reproduc ...
lasts from 10 minutes to four hours. Females are receptive for seven- to 10-day intervals during the three-week breeding season, and can mate with multiple males. Along with the
striped skunk The striped skunk (''Mephitis mephitis'') is a skunk of the genus '' Mephitis'' that occurs across much of North America, including southern Canada, the United States, and northern Mexico. It is currently listed as least concern by the IUCN on ac ...
, the American mink is among the only mammals to mate in spring that have a short delay before implantation. This
delayed implantation Embryonic diapause (from late 19th century English: dia- ‘through’ + pause- 'delay') (aka delayed implantation in mammals) is an evolutionary reproductive strategy used by several animal species across a number of kingdoms, including approximate ...
allows pregnant minks to keep track of environmental conditions and select an ideal time and place for
parturition Birth is the act or process of bearing or bringing forth offspring, also referred to in technical contexts as parturition. In mammals, the process is initiated by hormones which cause the muscular walls of the uterus to contract, expelling the f ...
. The
gestation period In mammals, pregnancy is the period of reproduction during which a female carries one or more live offspring from implantation in the uterus through gestation. It begins when a fertilized zygote implants in the female's uterus, and ends once it ...
lasts from 40 to 75 days, with actual embryonic development taking place for 30–32 days, indicating implantation delay can last from eight to 45 days. The young are born from April to June, in litters consisting of four kits on average. The litters are often multiply sired. Exceptionally large litters of 11 kits have been recorded in Tartaria and 16 in the United States. The kits are blind at birth, weighing six grams and possessing a short coat of fine, silver-white hairs. The kits are dependent on their mother's milk, which contains 3.8%
lipid Lipids are a broad group of naturally-occurring molecules which includes fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E and K), monoglycerides, diglycerides, phospholipids, and others. The functions of lipids include ...
s, 6.2%
protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...
, 4.6%
lactose Lactose is a disaccharide sugar synthesized by galactose and glucose subunits and has the molecular formula C12H22O11. Lactose makes up around 2–8% of milk (by mass). The name comes from ' (gen. '), the Latin word for milk, plus the suffix '' - ...
and 10.66% mineral salts. Their eyes open after 25 days, with
weaning Weaning is the process of gradually introducing an infant human or another mammal to what will be its adult diet while withdrawing the supply of its mother's milk. The process takes place only in mammals, as only mammals produce milk. The infan ...
occurring after five weeks. The kits begin hunting after eight weeks of age, but stay close to their mother until autumn, when they become independent. Sexual maturity is attained during the kit's first spring, when they are about 10 months old.


Diet

The American mink is a carnivorous animal that feeds on
rodent Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are na ...
s,
fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of li ...
,
crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group ...
s,
amphibian Amphibians are tetrapod, four-limbed and ectothermic vertebrates of the Class (biology), class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terres ...
s, and
bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...
s. It kills
vertebrate Vertebrates () comprise all animal taxa within the subphylum Vertebrata () ( chordates with backbones), including all mammals, birds, reptiles, amphibians, and fish. Vertebrates represent the overwhelming majority of the phylum Chordata, ...
prey by biting the back of the head or neck, leaving canine puncture marks apart. The American mink often kills birds, including larger species like
seagull Gulls, or colloquially seagulls, are seabirds of the family Laridae in the suborder Lari. They are most closely related to the terns and skimmers and only distantly related to auks, and even more distantly to waders. Until the 21st century, m ...
s and
cormorant Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the IOC adopted a consensus taxonomy of seven ge ...
s, by drowning. In its natural range, fish are its primary prey. Although inferior to the
North American river otter The North American river otter (''Lontra canadensis''), also known as the northern river otter and river otter, is a semiaquatic mammal that endemism, only lives on the North American continent, along its waterways and coasts. An adult North Amer ...
in hunting fish,
Audubon The National Audubon Society (Audubon; ) is an American non-profit environmental organization dedicated to conservation of birds and their habitats. Located in the United States and incorporated in 1905, Audubon is one of the oldest of such org ...
and Bachman once reported seeing a mink carrying a foot-long
trout Trout are species of freshwater fish belonging to the genera '' Oncorhynchus'', ''Salmo'' and ''Salvelinus'', all of the subfamily Salmoninae of the family Salmonidae. The word ''trout'' is also used as part of the name of some non-salmoni ...
. A similar sighting was also confirmed in 2019 within the
Cattaraugus Creek Cattaraugus Creek is a stream, approximately long, in western New York in the United States.prairie Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the ...
sloughs primarily target
frog A frog is any member of a diverse and largely Carnivore, carnivorous group of short-bodied, tailless amphibians composing the order (biology), order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-f ...
s,
tadpole A tadpole is the larval stage in the biological life cycle of an amphibian. Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial. Tadpoles have some fish-like features that may not be found i ...
s, and
mice A mouse ( : mice) is a small rodent. Characteristically, mice are known to have a pointed snout, small rounded ears, a body-length scaly tail, and a high breeding rate. The best known mouse species is the common house mouse (''Mus musculus' ...
. It is a formidable predator of
muskrat The muskrat (''Ondatra zibethicus'') is a medium-sized semiaquatic rodent native to North America and an introduced species in parts of Europe, Asia, and South America. The muskrat is found in wetlands over a wide range of climates and habitat ...
s, which are chased underwater and killed in their own burrows. Among the rodents killed by the American mink in its native range are rats and mice of the
genera Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclat ...
''
Hesperomys Vesper mice are rodents belonging to a genus ''Calomys''. They are widely distributed in South America. Some species are notable as the vectors of Argentinian hemorrhagic fever and Bolivian hemorrhagic fever. The genus was originally named ''H ...
'', ''
Microtus ''Microtus'' is a genus of voles found in North America, Europe and northern Asia. The genus name refers to the small ears of these animals. About 62 species are placed in the genus. They are stout rodents with short ears, legs and tails. They ea ...
'', '' Sigmodon'', and ''
Neotoma A pack rat or packrat, also called a woodrat or trade rat, are any species in the North and Central American rodent genus ''Neotoma''. Pack rats have a rat-like appearance, with long tails, large ears, and large, black eyes. Pack rats are notice ...
''.
Marsh rabbit The marsh rabbit (''Sylvilagus palustris'') is a small cottontail rabbit found in marshes and swamps of coastal regions of the Eastern and Southern United States. It is a strong swimmer and found only near regions of water. It is similar in app ...
s are frequently taken in marshy or swampy tracts. In
Tartaria Tartary ( la, Tartaria, french: Tartarie, german: Tartarei, russian: Тартария, Tartariya) or Tatary (russian: Татария, Tatariya) was a blanket term used in Western European literature and cartography for a vast part of Asia bound ...
, the American mink's most important food items are
vole Voles are small rodents that are relatives of lemmings and hamsters, but with a stouter body; a longer, hairy tail; a slightly rounder head; smaller eyes and ears; and differently formed molars (high-crowned with angular cusps instead of low-c ...
s, fish, crustaceans, frogs, and aquatic insects. In winter, aquatic foods predominate, while land-based prey increases in importance during the spring. Within the
Altai Mountains The Altai Mountains (), also spelled Altay Mountains, are a mountain range in Central Asia, Central and East Asia, where Russia, China, Mongolia and Kazakhstan converge, and where the rivers Irtysh and Ob River, Ob have their headwaters. The m ...
, the American mink feeds predominantly on mammals such as rodents, shrews, and moles, as well as birds, reptiles, amphibians, and fish. Among the 11 different bird species preyed upon by minks in Altai are
dipper Dippers are members of the genus ''Cinclus'' in the bird family Cinclidae, so-called because of their bobbing or dipping movements. They are unique among passerines for their ability to dive and swim underwater. Taxonomy The genus ''Cinclus'' ...
s and
pine grosbeak The pine grosbeak (''Pinicola enucleator'') is a large member of the true finch family (biology), family, Fringillidae. It is the only species in the genus ''Pinicola''. It is found in coniferous woods across Alaska, the western mountains of the ...
s. Among fish, small species predominate in the diet of minks in Altai, and include;
minnow Minnow is the common name for a number of species of small freshwater fish, belonging to several genera of the families Cyprinidae and Leuciscidae. They are also known in Ireland as pinkeens. Smaller fish in the subfamily Leusciscidae are co ...
s,
gudgeon A gudgeon is a socket-like, cylindrical (i.e., ''female'') fitting attached to one component to enable a pivoting or hinging connection to a second component. The second component carries a pintle fitting, the male counterpart to the gudgeon, ...
s, and wide-headed
sculpin A sculpin is a type of fish that belongs to the superfamily Cottoidea in the order Scorpaeniformes.Kane, E. A. and T. E. Higham. (2012)Life in the flow lane: differences in pectoral fin morphology suggest transitions in station-holding demand a ...
s. In the Sverdlovsk and
Irkutsk Oblast Irkutsk Oblast (russian: Ирку́тская о́бласть, Irkutskaya oblast; bua, Эрхүү можо, Erkhüü mojo) is a federal subject of Russia (an oblast), located in southeastern Siberia in the basins of the Angara, Lena, and Nizh ...
s, mouse-like rodents are their most important foods, followed by birds, fish and insects. In the
Russian Far East The Russian Far East (russian: Дальний Восток России, r=Dal'niy Vostok Rossii, p=ˈdalʲnʲɪj vɐˈstok rɐˈsʲiɪ) is a region in Northeast Asia. It is the easternmost part of Russia and the Asian continent; and is admini ...
, where crustaceans are scarce, the American mink feeds extensively on
amphipod Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods range in size from and are mostly detritivores or scavengers. There are more than 9,900 amphipod species so far descr ...
s. In the
British Isles The British Isles are a group of islands in the North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner and Outer Hebrides, the Northern Isles, ...
, dietary composition varies seasonally and regionally.
European rabbit The European rabbit (''Oryctolagus cuniculus'') or coney is a species of rabbit native to the Iberian Peninsula (including Spain, Portugal, and southwestern France), western France, and the northern Atlas Mountains in northwest Africa. It has ...
s are the most commonly taken prey in areas where they are common, especially in summer. A range of small rodents and insectivores are preyed upon, but to a lesser degree.
European hare The European hare (''Lepus europaeus''), also known as the brown hare, is a species of hare native to Europe and parts of Asia. It is among the largest hare species and is adapted to temperate, open country. Hares are herbivorous and feed mainly ...
s are occasionally attacked. Minks in Britain prey on several bird species, with
duck Duck is the common name for numerous species of waterfowl in the family Anatidae. Ducks are generally smaller and shorter-necked than swans and geese, which are members of the same family. Divided among several subfamilies, they are a form t ...
s,
moorhen Moorhens—sometimes called marsh hens—are medium-sized water birds that are members of the rail family (Rallidae). Most species are placed in the genus ''Gallinula'', Latin for "little hen". They are close relatives of coots. They are of ...
s, and
coot Coots are medium-sized water birds that are members of the rail family, Rallidae. They constitute the genus ''Fulica'', the name being the Latin term for "coot". Coots have predominantly black plumage, and—unlike many rails—they are usually ...
s being most frequently targeted on lakes and rivers, while
gull Gulls, or colloquially seagulls, are seabirds of the family Laridae in the suborder Lari. They are most closely related to the terns and skimmers and only distantly related to auks, and even more distantly to waders. Until the 21st century, m ...
s are taken in coastal habitats. Marine species preyed upon in Britain include
European eel The European eel (''Anguilla anguilla'') is a species of eel, a snake-like, catadromous fish. They are normally around and rarely reach more than , but can reach a length of up to in exceptional cases. Eels have been important sources of fo ...
s, rock-pool fish such as blenny,
shore crab ''Carcinus maenas'' is a common littoral crab. It is known by different names around the world. In the British Isles, it is generally referred to as the shore crab, or green shore crab. In North America and South Africa, it bears the name eur ...
s and
crayfish Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, mu ...
. American minks have been implicated in the decline of the water vole in the United Kingdom and linked to the decline of waterfowl across their range in Europe. They are now considered vermin in much of Europe and are hunted for the purpose of
wildlife management Wildlife management is the management process influencing interactions among and between wildlife, its habitats and people to achieve predefined impacts. It attempts to balance the needs of wildlife with the needs of people using the best availabl ...
. In South America's
Cape Horn Biosphere Reserve The Cape Horn Biosphere Reserve (Cabo de Hornos Biosphere Reserve) is located in the extreme south of Chile and comprises marine areas, islands, fjords, channels, forests and moorland. It covers an area of approximately . All biosphere reserves inc ...
, mammals, including both native and exotic rodents, are the American mink's main prey throughout the year, though birds are of equal importance during their summer nesting periods. The American mink may pose a threat to
poultry Poultry () are domesticated birds kept by humans for their eggs, their meat or their feathers. These birds are most typically members of the superorder Galloanserae (fowl), especially the order Galliformes (which includes chickens, quails, a ...
. According to
Clinton Hart Merriam Clinton Hart Merriam (December 5, 1855 – March 19, 1942) was an American zoologist, mammalogist, ornithologist, entomologist, ecologist, ethnographer, geographer, naturalist and physician. He was commonly known as the 'father of mammalogy', a ...
and
Ernest Thompson Seton Ernest Thompson Seton (born Ernest Evan Thompson August 14, 1860 – October 23, 1946) was an English-born Canadian-American author, wildlife artist, founder of the Woodcraft Indians in 1902 (renamed Woodcraft League of America), and one of ...
, although the American mink is a potential poultry thief, it is overall less damaging than the
stoat The stoat (''Mustela erminea''), also known as the Eurasian ermine, Beringian ermine and ermine, is a mustelid native to Eurasia and the northern portions of North America. Because of its wide circumpolar distribution, it is listed as Least Conc ...
. Unlike the stoat, which often engages in
surplus killing Surplus killing, also known as excessive killing, killing for sport, henhouse syndrome, or overkill, is a common behavior exhibited by predators, in which they kill more prey than they can immediately eat and then they either cache or abandon th ...
, the mink usually limits itself to killing and eating one fowl during each attack. Studies in Britain indicate poultry and game birds only constitute 1% of the animals' overall diets; small mammals, especially rabbits, tend to dominate, followed by fish and birds, especially
moorhen Moorhens—sometimes called marsh hens—are medium-sized water birds that are members of the rail family (Rallidae). Most species are placed in the genus ''Gallinula'', Latin for "little hen". They are close relatives of coots. They are of ...
s and
coot Coots are medium-sized water birds that are members of the rail family, Rallidae. They constitute the genus ''Fulica'', the name being the Latin term for "coot". Coots have predominantly black plumage, and—unlike many rails—they are usually ...
s.


Relationships with other predators

The American mink replaces and sometimes kills the European mink wherever their ranges overlap. The decline of European mink populations seems to coincide with the spread of the American mink. The diets of the American mink and
European otter The Eurasian otter (''Lutra lutra''), also known as the European otter, Eurasian river otter, common otter, and Old World otter, is a semiaquatic mammal native to Eurasia. The most widely distributed member of the otter subfamily (Lutrinae) of th ...
overlap to a great extent. In areas where these two species are sympatric, competition with the otter for fish causes the American mink to hunt land-based prey more frequently. Large
birds of prey Birds of prey or predatory birds, also known as raptors, are hypercarnivorous bird species that actively hunt and feed on other vertebrates (mainly mammals, reptiles and other smaller birds). In addition to speed and strength, these predators ...
s, such as
bald eagle The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche as ...
s (''Haliaeetus leucocephalus'') and
great horned owl The great horned owl (''Bubo virginianus''), also known as the tiger owl (originally derived from early naturalists' description as the "winged tiger" or "tiger of the air"), or the hoot owl, is a large owl native to the Americas. It is an extrem ...
s (''Bubo virginianus'') occasionally hunt American mink.


Intelligence

An early behavioral study was performed in the 1960s to assess visual learning ability in minks,
ferret The ferret (''Mustela furo'') is a small, Domestication, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (''Mustela putorius''), evidenced by their Hybrid (biol ...
s, skunks, and house cats. Animals were tested on their ability to recognize objects, learn their valences and make object selections from memory. Minks were found to outperform ferrets, skunks, and cats in this task, but this letter (short paper) fails to account for a possible conflation of a cognitive ability (decision making,
associative learning Learning is the process of acquiring new understanding, knowledge, behaviors, skills, values, attitudes, and preferences. The ability to learn is possessed by humans, animals, and some machines; there is also evidence for some kind of learnin ...
) with a largely perceptual ability ( invariant object recognition).


Range


Natural

The species' natural range encompasses most of North America, from
Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., ...
, through
Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
and further into the
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
except
Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...
and the more arid areas of
California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...
,
Nevada Nevada ( ; ) is a U.S. state, state in the Western United States, Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. N ...
,
Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it ...
,
New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Ker ...
, and
West Texas West Texas is a loosely defined region in the U.S. state of Texas, generally encompassing the arid and semiarid lands west of a line drawn between the cities of Wichita Falls, Abilene, and Del Rio. No consensus exists on the boundary betwee ...
.


Introduced


Argentina

The American mink was deliberately introduced for commercial fur production in several provinces of
Patagonia Patagonia () refers to a geographical region that encompasses the southern end of South America, governed by Argentina and Chile. The region comprises the southern section of the Andes Mountains with lakes, fjords, temperate rainforests, and gl ...
in 1930. The animals escaped or were released from farms in
Chubut Province Chubut ( es, Provincia del Chubut, ; cy, Talaith Chubut) is a province in southern Argentina, situated between the 42nd parallel south (the border with Río Negro Province), the 46th parallel south (bordering Santa Cruz Province), the Andes ra ...
and now occur in the Chubut and
Río Negro Province Río Negro (, ''Black River'') is a province of Argentina, located in northern Patagonia. Neighboring provinces are from the south clockwise Chubut, Neuquén, Mendoza, La Pampa and Buenos Aires. To the east lies the Atlantic Ocean. Its capit ...
s and
Tierra del Fuego Tierra del Fuego (, ; Spanish for "Land of the Fire", rarely also Fireland in English) is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan. The archipelago consists of the main island, Isla G ...
. In
Argentina Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argentina covers an area of , making it the second-largest country in South America after Brazil, th ...
the mink is one of the major menaces of the
Hooded Grebe The hooded grebe (''Podiceps gallardoi''), is a medium-sized grebe found in the southern region of Argentina. It grows to about in length, and is black and white in color. It is found in isolated lakes in the most remote parts of Patagonia and s ...
, which risks becoming
extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
.


South Chile

In
Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...
, American minks were introduced to
Magallanes Region The Magallanes Region (), officially the Magallanes y la Antártica Chilena Region ( es, Región de Magallanes y de la Antártica Chilena), is one of Chile's 16 first order administrative divisions. It is the southernmost, largest, and second lea ...
in the 1930s. Ever since minks were freed into nature during the crisis of the fur industry the mink has expanded its range across Chile. Actually it ranges from
Araucanía Region The Araucanía ( ), La Araucanía Region ( es, Región de La Araucanía ) is one of Chile's 16 first-order administrative divisions, and comprises two provinces: Malleco in the north and Cautín in the south. Its capital and largest city is Te ...
in the north to Magallanes Region in the south. However, there are isolated territories in between where the mink is not found, probably due to biogeographic barriers. One of the latest areas where the mink has been found is Chiloé Archipelago,- minks were reported there for the first time 2013, making scientists suspect they may have arrived on a ship.


Western Europe

Feral A feral () animal or plant is one that lives in the wild but is descended from domesticated individuals. As with an introduced species, the introduction of feral animals or plants to non-native regions may disrupt ecosystems and has, in some ...
American minks in Europe are thought to be of
domesticated Domestication is a sustained multi-generational relationship in which humans assume a significant degree of control over the reproduction and care of another group of organisms to secure a more predictable supply of resources from that group. A ...
stock derived from the ''N. v. vison'', ''N. v. melampeplus'' and ''N. v. ingens'' subspecies. The first specimens were imported to Europe in 1920 for fur-farming purposes. The American mink was introduced in
Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...
in the 1950s, and currently resides mostly in the northeastern part of the Italian Peninsula. The majority of these populations do not appear to be self-sufficient, though minks in the
Monti Prenestini The Monti Prenestini is a mountain range in the Lazio sub-Apennines, in central Italy to the east of Rome. It is of limestone formation. It is bounded by the Monti Tiburtini to the north, by the Monti Ruffi to the east, and by the valley of th ...
and Simbruini in
Lazio it, Laziale , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = , demographics1_footnotes = , demographics1_title1 = , demographics1_info1 = , demographics1_title2 ...
have reproduced successfully. Spagnesi M, Toso S, De Marinins AM (2002)
I Mammiferi d'Italia
'. Ministero dell'Ambiente e della Tutela del Territorio e Istituto Nazionale per la Fauna Selvatica, Italy.
Escapees of fur farms established a self-sustaining and expanding population on the
Iberian peninsula The Iberian Peninsula (), ** * Aragonese and Occitan: ''Peninsula Iberica'' ** ** * french: Péninsule Ibérique * mwl, Península Eibérica * eu, Iberiar penintsula also known as Iberia, is a peninsula in southwestern Europe, defi ...
by the second half of the 20th century. In 2013, the
Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Cana ...
government announced a plan to eradicate the species, as a means to protect the falling populations of European mink and other endangered species affected such as the
Pyrenean desman The Pyrenean desman also called Iberian desman (''Galemys pyrenaicus'') is a small semiaquatic, globally threatened mammal related to moles and shrews, and, along with the Russian desman (''Desmana moschata''), is one of the two extant members ...
. The first mink
farm A farm (also called an agricultural holding) is an area of land that is devoted primarily to agricultural processes with the primary objective of producing food and other crops; it is the basic facility in food production. The name is used fo ...
in
Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and t ...
was built in 1927, with escapees establishing wild populations within 30 years of its establishment. The first feral mink populations arose in 1930, establishing territories in southwestern Norway. These feral minks, augmented by further escapees, formed the basis of a strong population in
Hordaland Hordaland () was a county in Norway, bordering Sogn og Fjordane, Buskerud, Telemark, and Rogaland counties. Hordaland was the third largest county, after Akershus and Oslo, by population. The county government was the Hordaland County Municipal ...
by the end of
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
. Feral mink colonised eastern Norway in 1930 and had become established in most southeastern counties in the early 1940s. By 1950, feral mink reached central Norway, with further populations occurring in the northern counties of
Nordland Nordland (; smj, Nordlánnda, sma, Nordlaante, sme, Nordlánda, en, Northland) is a county in Norway in the Northern Norway region, the least populous of all 11 counties, bordering Troms og Finnmark in the north, Trøndelag in the south, N ...
and
Troms Troms (; se, Romsa; fkv, Tromssa; fi, Tromssa) is a former county in northern Norway. On 1 January 2020 it was merged with the neighboring Finnmark county to create the new Troms og Finnmark county. This merger is expected to be reversed by t ...
. During the post-World War II period until 1965, mink had colonised most of the country. In modern times, the American mink occupies all of the Norwegian mainland, but is absent on some islands. The American mink was first imported to
Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...
in 1929, though a series of escapes and releases led to the establishment of a self-sufficient feral population in
Devon Devon ( , historically known as Devonshire , ) is a ceremonial and non-metropolitan county in South West England. The most populous settlement in Devon is the city of Plymouth, followed by Devon's county town, the city of Exeter. Devon is ...
by the late 1950s, and others by the early 1960s. In
Ireland Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Grea ...
, the American mink was not farmed until the early 1950s, thus feral populations established themselves there much later. The species is now widespread in mainland Great Britain and Ireland, though some places remain uncolonised. It has established itself on a few islands, including Arran and
Lewis and Harris Lewis and Harris ( gd, Leòdhas agus na Hearadh, sco, Lewis an Harris), or Lewis with Harris, is a single Scottish island in the Outer Hebrides, divided by mountains. It is the largest island in Scotland and the third largest in the British ...
. Until 2005,
mink hunting Mink hunting is a country sport involving the hunting of American mink with scent hounds along the waterways which make up their habitat, in a manner similar to fox hunting.England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...
; 46,750,
Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...
; 52,250,
Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the ...
; 9,750). This population may be declining as
European otter The Eurasian otter (''Lutra lutra''), also known as the European otter, Eurasian river otter, common otter, and Old World otter, is a semiaquatic mammal native to Eurasia. The most widely distributed member of the otter subfamily (Lutrinae) of th ...
numbers increase. There are no estimates for the mink population in Ireland, but it is thought to be low, because of Ireland's strong otter population.


Former USSR

In 1933, American minks were released into the
Voronezh Oblast Voronezh Oblast (russian: Воронежская область, Voronezhskaya oblast) is a federal subject of Russia (an oblast). Its administrative center is the city of Voronezh. Its population was 2,308,792 as of the 2021 Census. Geography V ...
in
European Russia European Russia (russian: Европейская Россия, russian: европейская часть России, label=none) is the western and most populated part of Russia. It is geographically situated in Europe, as opposed to the cou ...
. Until 1963, more minks were introduced in various quantities in the
Voronezh Voronezh ( rus, links=no, Воро́неж, p=vɐˈronʲɪʂ}) is a city and the administrative centre of Voronezh Oblast in southwestern Russia straddling the Voronezh River, located from where it flows into the Don River. The city sits on the ...
and
Arkhangelsk Oblast Arkhangelsk Oblast (russian: Арха́нгельская о́бласть, ''Arkhangelskaya oblast'') is a federal subjects of Russia, federal subject of Russia (an oblast). It includes the Arctic Ocean, Arctic archipelagos of Franz Josef Land ...
s,
Karelia Karelia ( Karelian and fi, Karjala, ; rus, Каре́лия, links=y, r=Karélija, p=kɐˈrʲelʲɪjə, historically ''Korjela''; sv, Karelen), the land of the Karelian people, is an area in Northern Europe of historical significance for ...
, in Kalininsk, Gorkovsk,
Volgograd Volgograd ( rus, Волгогра́д, a=ru-Volgograd.ogg, p=vəɫɡɐˈɡrat), geographical renaming, formerly Tsaritsyn (russian: Цари́цын, Tsarítsyn, label=none; ) (1589–1925), and Stalingrad (russian: Сталингра́д, Stal ...
and
Chelyabinsk Oblast Chelyabinsk Oblast (russian: Челя́бинская о́бласть, ''Chelyabinskaya oblast'') is a federal subject (an oblast) of Russia in the Ural Mountains region, on the border of Europe and Asia. Its administrative center is the city ...
s, and into
Tatarstan The Republic of Tatarstan (russian: Республика Татарстан, Respublika Tatarstan, p=rʲɪsˈpublʲɪkə tətɐrˈstan; tt-Cyrl, Татарстан Республикасы), or simply Tatarstan (russian: Татарстан, tt ...
and Bashkir, as well as the Lithuanian and
Byelorussian SSR The Byelorussian Soviet Socialist Republic (BSSR, or Byelorussian SSR; be, Беларуская Савецкая Сацыялістычная Рэспубліка, Bielaruskaja Savieckaja Sacyjalistyčnaja Respublika; russian: Белор ...
s. Beyond the
Urals The Ural Mountains ( ; rus, Ура́льские го́ры, r=Uralskiye gory, p=ʊˈralʲskʲɪjə ˈɡorɨ; ba, Урал тауҙары) or simply the Urals, are a mountain range that runs approximately from north to south through European ...
, American minks were introduced in the Sverdlovsk,
Tyumen Tyumen ( ; rus, Тюмень, p=tʲʉˈmʲenʲ, a=Ru-Tyumen.ogg) is the administrative center and largest city of Tyumen Oblast, Russia. It is situated just east of the Ural Mountains, along the Tura River. Fueled by the Russian oil and gas indu ...
,
Omsk Omsk (; rus, Омск, p=omsk) is the administrative center and largest city of Omsk Oblast, Russia. It is situated in southwestern Siberia, and has a population of over 1.1 million. Omsk is the third largest city in Siberia after Novosibirsk ...
,
Kemerovo Kemerovo ( rus, Ке́мерово, p=ˈkʲemʲɪrəvə) is an industrial city and the administrative center of Kemerovo Oblast, Russia, located at the confluence of the Iskitimka and Tom Rivers, in the major coal mining region of the Kuznetsk Ba ...
,
Novosibirsk Novosibirsk (, also ; rus, Новосиби́рск, p=nəvəsʲɪˈbʲirsk, a=ru-Новосибирск.ogg) is the largest city and administrative centre of Novosibirsk Oblast and Siberian Federal District in Russia. As of the Russian Census ...
, Chita and
Irkutsk Oblast Irkutsk Oblast (russian: Ирку́тская о́бласть, Irkutskaya oblast; bua, Эрхүү можо, Erkhüü mojo) is a federal subject of Russia (an oblast), located in southeastern Siberia in the basins of the Angara, Lena, and Nizh ...
s, in the Altai and
Krasnoyarsk Krai Krasnoyarsk Krai ( rus, Красноя́рский край, r=Krasnoyarskiy kray, p=krəsnɐˈjarskʲɪj ˈkraj) is a federal subject of Russia (a krai), with its administrative center in the city of Krasnoyarsk, the third-largest city in Siber ...
, in the Tuvan, Buryat and
Yakut Autonomous Soviet Socialist Republic The Yakut Autonomous Soviet Socialist Republic (russian: Якутская Автономная Советская Социалистическая Республика, ''Yakutskaya Avtonomnaya Sovetskaya Sotsialisticheskaya Respublika''; sah, С ...
s, into the
Magadan Magadan ( rus, Магадан, p=məɡɐˈdan) is a port town and the administrative center of Magadan Oblast, Russia, located on the Sea of Okhotsk in Nagayev Bay (within Taui Bay) and serving as a gateway to the Kolyma region. History Maga ...
,
Kamchatka The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and wes ...
and
Amur Oblast Amur Oblast ( rus, Аму́рская о́бласть, r=Amurskaya oblast, p=ɐˈmurskəjə ˈobləsʲtʲ) is a federal subject of Russia (an oblast), located on the banks of the Amur and Zeya Rivers in the Russian Far East. The administrative ...
s, into the
Khabarovsk Khabarovsk ( rus, Хабaровск, a=Хабаровск.ogg, r=Habárovsk, p=xɐˈbarəfsk) is the largest types of inhabited localities in Russia, city and the administrative centre of Khabarovsk Krai, Russia,Law #109 located from the China ...
and
Primorsky Krai Primorsky Krai (russian: Приморский край, r=Primorsky kray, p=prʲɪˈmorskʲɪj kraj), informally known as Primorye (, ), is a federal subject (a krai) of Russia, located in the Far East region of the country and is a part of the ...
, into the
Chukotka Autonomous Okrug Chukotka (russian: Чуко́тка), officially the Chukotka Autonomous Okrug,, ''Čukotkakèn avtonomnykèn okrug'', is the easternmost federal subjects of Russia, federal subject of Russia. It is an autonomous okrug situated in the Russian ...
and several other locations, including
Sakhalin Sakhalin ( rus, Сахали́н, r=Sakhalín, p=səxɐˈlʲin; ja, 樺太 ''Karafuto''; zh, c=, p=Kùyèdǎo, s=库页岛, t=庫頁島; Manchu: ᠰᠠᡥᠠᠯᡳᠶᠠᠨ, ''Sahaliyan''; Orok: Бугата на̄, ''Bugata nā''; Nivkh: ...
and
Urup Island Urup ( ja, 得撫島, Uruppu-to; russian: Уру́п, Urúp, ain, ウルㇷ゚, Urup) is an uninhabited volcanic island in the Kuril Islands chain in the south of the Sea of Okhotsk, northwest Pacific Ocean. Its name is derived from the Ainu la ...
. In the Caucasus region, American minks were released into
North Ossetia North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north'' is ...
. In Central Asia they were released in the
Tien Shan The Tian Shan,, , otk, 𐰴𐰣 𐱅𐰭𐰼𐰃, , tr, Tanrı Dağı, mn, Тэнгэр уул, , ug, تەڭرىتاغ, , , kk, Тәңіртауы / Алатау, , , ky, Теңир-Тоо / Ала-Тоо, , , uz, Tyan-Shan / Tangritog‘ ...
region. Originally, captive-bred minks were used, but wild specimens were later released to facilitate the species' acclimatisation within
Soviet The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...
territories. Several years after the first release, introductions into the ranges already held by native European minks were discontinued, with most releases from then on taking place in Siberia and the Far East. Although considerable areas were occupied by the American mink by the early 1960s, the species' Soviet range was never continuous, as most released populations were isolated from one another.


Iceland

The species has been present in
Iceland Iceland ( is, Ísland; ) is a Nordic island country in the North Atlantic Ocean and in the Arctic Ocean. Iceland is the most sparsely populated country in Europe. Iceland's capital and largest city is Reykjavík, which (along with its s ...
since the 1930s, and has become well established, despite it being heavily hunted since 1939. However, its population underwent a 42% decline during the years 2002–2006, which coincided with a decline in
sand eel Sand eel or sandeel is the common name used for a considerable number of species of fish. While they are not true eels, they are eel-like in their appearance and can grow up to in length. Many species are found off the western coasts of Europe ...
populations resulting in a drop in the seabird populations on which the minks feed.


Diseases and parasites

The American mink often carries light
tick Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes. Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". Ticks are external parasites, living by ...
and
flea Flea, the common name for the order Siphonaptera, includes 2,500 species of small flightless insects that live as external parasites of mammals and birds. Fleas live by ingesting the blood of their hosts. Adult fleas grow to about long, a ...
infestations. Tick species known to infest minks include ''
Ixodes hexagonus ''Ixodes hexagonus'', also known by the common name hedgehog tick, is a tick species in the genus ''Ixodes''. It is a parasite of the European hedgehog The European hedgehog (''Erinaceus europaeus''), also known as the West European hedgehog ...
'', ''
Ixodes canisuga ''Ixodes canisuga'', the dog tick, is a species of tick in the family Ixodidae that can be found in Russia and throughout Europe where it feeds on foxes, cats, dogs, horses, badgers and sheep. It has a thick cuticle which allows it to withstand ...
'', ''
Ixodes ricinus ''Ixodes ricinus'', the castor bean tick, is a chiefly European species of hard-bodied tick. It may reach a length of when engorged with a blood meal, and can transmit both bacterial and viral pathogens such as the causative agents of Lyme disea ...
'', and ''
Ixodes acuminatus ''Ixodes'' is a genus of hard-bodied ticks (family Ixodidae). It includes important disease vectors of animals and humans (tick-borne disease), and some species (notably ''Ixodes holocyclus'') inject toxins that can cause paralysis. Some ti ...
''. Flea species known to infest minks include '' Palaeopsylla minor'', '' Malaraeus penicilliger'', '' Ctenopthalmus noblis'', '' Megabothris walkeri'', '' Typhloceras poppei'', and ''
Nosopsyllus fasciatus ''Nosopsyllus fasciatus'', the northern rat flea, is a species of flea found on domestic rats and house mice. Northern rat fleas are external parasitism, parasites, living by hematophagy off the blood of rodents. ''N. fasciatus'' can bite humans, ...
''.
Endoparasite Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson has ...
s include '' Skrjabingylus nasicola'' and '' Troglotrema acutum''. Trematode ''
Metorchis conjunctus ''Metorchis conjunctus'', common name Canadian liver fluke, is a species of trematode parasite in the family Opisthorchiidae. It can infect mammals that eat raw fish in North America. The first intermediate host is a freshwater snail and the ...
'' can also infect American minks.
Transmissible mink encephalopathy Transmissible mink encephalopathy (TME) is a rare sporadic disease that affects the central nervous system of ranch-raised adult mink. It is a transmissible spongiform encephalopathy, caused by proteins called prions. Clinical signs This illness ...
(TME) is a
prion Prions are misfolded proteins that have the ability to transmit their misfolded shape onto normal variants of the same protein. They characterize several fatal and transmissible neurodegenerative diseases in humans and many other animals. It ...
disease of mink, similar to
BSE BSE may refer to: Medicine * Bovine spongiform encephalopathy, also known as mad cow disease, a neurodegenerative disease of cattle * Breast self-examination Stock exchanges * Bahrain Stock Exchange, Bahrain * Baku Stock Exchange, Azerbaijan * B ...
in
cattle Cattle (''Bos taurus'') are large, domesticated, cloven-hooved, herbivores. They are a prominent modern member of the subfamily Bovinae and the most widespread species of the genus ''Bos''. Adult females are referred to as cows and adult mal ...
and
scrapie Scrapie () is a fatal, degenerative disease affecting the nervous systems of sheep and goats. It is one of several transmissible spongiform encephalopathies (TSEs), and as such it is thought to be caused by a prion. Scrapie has been known since ...
in
sheep Sheep or domestic sheep (''Ovis aries'') are domesticated, ruminant mammals typically kept as livestock. Although the term ''sheep'' can apply to other species in the genus ''Ovis'', in everyday usage it almost always refers to domesticated s ...
. A 1985 outbreak of TME in
Stetsonville, Wisconsin Stetsonville is a village in Taylor County, Wisconsin, United States. The population was 541 at the 2010 census. Geography Stetsonville is located at (45.076413, -90.313952). According to the United States Census Bureau, the village has a t ...
resulted in a 60% mortality rate for the minks. Further testing revealed this agent is transmissible between mink, cattle, and sheep. The Stetsonville outbreak may have been due to the mink being fed carcasses or otherwise consuming other infected animals. ''
Toxoplasma gondii ''Toxoplasma gondii'' () is an obligate intracellular parasitic protozoan (specifically an apicomplexan) that causes toxoplasmosis. Found worldwide, ''T. gondii'' is capable of infecting virtually all warm-blooded animals, but felids, such as d ...
'' has been recorded in American minks in southern
Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...
, with 59%
seroprevalence Seroprevalence is the number of persons in a population who test positive for a specific disease based on serology (blood serum) specimens; often presented as a percent of the total specimens tested or as a proportion per 100,000 persons tested. As ...
in the 73 mink analyzed in one study.
Southern river otter The southern river otter (''Lontra provocax'') is a species of otter that lives in Chile and Argentina. Although called a "river otter", it inhabits both marine and freshwater environments. It sometimes is considered a subspecies of ''Lontra cana ...
s of the area were also found to have high ''T. gondii'' seroprevalence in this study, showing a high exposure of
semiaquatic In biology, semiaquatic can refer to various types of animals that spend part of their time in water, or plants that naturally grow partially submerged in water. Examples are given below. Semiaquatic animals Semiaquatic animals include: * Verte ...
mustelids The Mustelidae (; from Latin ''mustela'', weasel) are a family of carnivorous mammals, including weasels, badgers, otters, ferrets, martens, minks and wolverines, among others. Mustelids () are a diverse group and form the largest famil ...
to the parasite in this part of Chile.


Decline of wild mink

Because of numerous incidents of domestic mink escaping from fur farms and establishing themselves in the wild, concern has arisen among conservationists of the possible repercussions such escapes may have on natural wild mink populations. Domestic mink are larger than wild mink, which may cause problems with the ecosystem when they escape. Minks are solitary, territorial animals and are intolerant of other minks. In times of overpopulation, they control their own numbers by either killing each other through direct conflict or by causing weaker minks to be driven from territory until starvation sets in.Dunstone, N. (1993) ''The Mink''. London. When hundreds or thousands of released domestic minks flood an ecosystem, it causes a great disturbance for the wild minks, resulting in the deaths of the majority of the released mink and many of the wild ones from starvation or injuries incurred while fighting over territory. When a domestic mink survives long enough to reproduce, it may cause problems for the wild mink populations. The adding of weaker domestic mink genes into wild mink populations is believed by some to have contributed to the decline of mink populations in Canada. A 2006 study in Denmark concluded, due to frequent escapes from existing mink farms, "Closing mink farms may result in a crash of the free-ranging population, or alternatively it may result in the establishment of a better-adapted, truly feral population that may ultimately outnumber the population that was present before farm closures." The study reported more information would be necessary to determine the outcome. Another Danish study reported a significant majority of the "wild" mink were mink which had escaped from fur farms. About 47% had escaped within two months, 31% had escaped prior to two months, and 21% "may or may not have been born in nature." The survival rate for recently released minks is reportedly lower than for wild minks, but if feral minks survive at least two months, their survival rate is the same as for wild minks. The authors suggest this is due to the rapid behavioural adaptation of the animals.Hammershøj, M. (2004
Population ecology of free-ranging American mink ''Mustela vison'' in Denmark
PhD thesis, National Environmental Research Institute, Kalø, Denmark.


Relationships with humans


Disease

The American mink and
European mink The European mink (''Mustela lutreola''), also known as the Russian mink and Eurasian mink, is a semiaquatic species of mustelid native to Europe. It is similar in colour to the American mink, but is slightly smaller and has a less specialized ...
have both been found to transmit
SARS-CoV-2 Severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) is a strain of coronavirus that causes COVID-19 (coronavirus disease 2019), the respiratory illness responsible for the ongoing COVID-19 pandemic. The virus previously had a ...
, the virus that causes
COVID-19 Coronavirus disease 2019 (COVID-19) is a contagious disease caused by a virus, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The first known case was COVID-19 pandemic in Hubei, identified in Wuhan, China, in December ...
.


Fur use

American minks are primarily used in manufacturing
fur coat Fur clothing is clothing made from the preserved skins of mammals. Fur is one of the oldest forms of clothing, and is thought to have been widely used by people for at least 120,000 years. The term 'fur' is often used to refer to a specific i ...
s,
jacket A jacket is a garment for the upper body, usually extending below the hips. A jacket typically has sleeves, and fastens in the front or slightly on the side. A jacket is generally lighter, tighter-fitting, and less insulating than a coat, which ...
s, and
cape A cape is a clothing accessory or a sleeveless outer garment which drapes the wearer's back, arms, and chest, and connects at the neck. History Capes were common in medieval Europe, especially when combined with a hood in the chaperon. Th ...
s. Pelts that are not able to be converted into these items are made into trimming for
cloth Textile is an umbrella term that includes various fiber-based materials, including fibers, yarns, filaments, threads, different fabric types, etc. At first, the word "textiles" only referred to woven fabrics. However, weaving is not the ...
and fur coats. Mink
scarves A scarf, plural ''scarves'', is a piece of fabric worn around the neck or head for warmth, sun protection, cleanliness, fashion, religious reasons, or used to show the support for a sports club or team. They can be made in a variety of differ ...
and stoles are also manufactured. Jackets and capes are mostly made from small to medium-sized specimens, usually females and young males, while trimming, scarves and stoles are made from adult males. The most valuable peltries come from eastern Canada which, although the smallest, are the silkiest and darkest.


Trapping

Although difficult to catch, the American mink, prior to being commercially farmed, was among the most frequently trapped furbearers as, unlike other furbearing mammals, it did not hibernate in winter, and could thus be caught on a nightly basis even in the far north. Minks were legally trapped from early November to early April, when their pelts were prime. Minks caught in traps cling to life with great tenacity, having been known to break their teeth in trying to extricate themselves from steel traps.
Elliott Coues Elliott Ladd Coues (; September 9, 1842 – December 25, 1899) was an American army surgeon, historian, ornithologist, and author. He led surveys of the Arizona Territory, and later as secretary of the United States Geological and Geographic ...
described a trapped mink thusly: One Native American method involved using a bait (usually a slit open chicken carcass filled with fish oil and oysters) tied to a rope and dragged around an area laden with traps. A mink would thus follow the trail into one of the traps. Another indigenous method involved placing traps scented with muskrat and female mink musk on top of disused muskrat dens by water bodies. Attracted by the scent of food and a female, the mink would get caught in the trap and drown. On the American prairies, only the steel trap was used, due to the lack of timber.


Farming

Breeding American minks for their fur began in the late 19th century, as increasing enthusiasm for mink pelts made the harvesting of wild minks insufficient to meet the new demands. American minks are easily kept in captivity, and breed readily. In 2005, the U.S. ranked fourth in production behind
Denmark ) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal anthem , image_map = EU-Denmark.svg , map_caption = , subdivision_type = Sovereign state , subdivision_name = Danish Realm, Kingdom of Denmark ...
, China and the Netherlands. Minks typically breed in March, and give birth to their litters in May. Farmers vaccinate the young kits for botulism, distemper, enteritis, and, if needed, pneumonia. They are harvested in late November and December. Methods for killing animals on fur farms, as on all farms, are detailed in the American Veterinary Medical Association's Report on Euthanasia which is used as a voluntary guideline for state departments of agriculture which have jurisdiction over all farms raising domesticated livestock, including minks. In the past, some mink farms successfully provided pools of water for the mink to swim; however, this practice is unheard-of in modern mink production. Minks are motivated to access swimming water, and the absence of water is a source of frustration on modern farms. The ideal diet for farm-bred minks consists of four to five ounces of horse meat and a quarter-pint of milk once daily.


=Colour mutations

=
Selective breeding Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant mal ...
has produced a number of different colour shades in mink peltries, ranging from pure white, through beiges, browns, and greys, to a brown that is almost black. The two standard strains are brown and "black cross" which, when paired, produce numerous colour variations. When an albino mink is born, it is standard procedure in fur farms to breed it to other colour mutations to produce grey and light-brown pastel shades. The following graph is a simplification of the main colour strains:


As pets

Wild minks can be tamed if caught young, but can be difficult to handle and are usually not handled bare-handed. In the late 19th century, tame American minks were often reared for ratting, much as
ferret The ferret (''Mustela furo'') is a small, Domestication, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (''Mustela putorius''), evidenced by their Hybrid (biol ...
s were used in Europe. Some modern ratters have revived this practice using farm-raised mink, sometimes alongside ratting dogs. They are sometimes more effective
ratter A rat-catcher is a person who kills or captures rats as a professional form of pest control. Keeping the rat population under control was practiced in Europe to prevent the spread of diseases, most notoriously the Black Death, and to prevent d ...
s than
terrier Terrier (from Latin ''terra'', 'earth') is a type of dog originally bred to hunt vermin. A terrier is a dog of any one of many breeds or landraces of the terrier type, which are typically small, wiry, game, and fearless. Terrier breeds vary ...
s, as they can enter rat holes and drive rats from their hiding places. Because of their fondness for bathing, captive American minks may enter
kettle A kettle, sometimes called a tea kettle or teakettle, is a type of pot specialized for boiling water, commonly with a ''lid'', ''spout'', and ''handle'', or a small electric kitchen appliance of similar shape that functions in a self-contained ...
s or other open water-containing vessels. When minks of wild stock are confined with tame ones, the latter invariably dominate the former. They have also been known to dominate
cat The cat (''Felis catus'') is a domestic species of small carnivorous mammal. It is the only domesticated species in the family Felidae and is commonly referred to as the domestic cat or house cat to distinguish it from the wild members of ...
s in confrontations. Although intelligent, minks are not quick to learn tricks taught to them by their owners. Although domestic minks have been bred in captivity for almost a century, they have not been bred to be tame. Domestic minks have been bred for size, fur quality, and color. However, the U.S. Fur Commission claims "mink are truly domesticated animals", based on the number of years they have been kept on fur farms.Mink Farming in the United States
Fur Commission USA, Colorado (2008)


Literature

As an invasive species in the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
, minks have been the subject of at least two novels.
Ewan Clarkson Ewan Clarkson (1929–2010) was an English author specialising in books about nature, particularly wild animals. Life and career Clarkson was born in Workington on 23 January 1929.''International Who's Who of Authors and Writers 2004'', Routled ...
's 1968 ''Break for Freedom'' (published as ''Syla, the Mink'' in the US) tells the story of a female mink escaped from a fur farm in a realistic style. On the other hand, A.R. Lloyd's 1982 ''Kine'' is a
heroic fantasy Heroic fantasy is a subgenre of fantasy in which events occur in a world where magic is prevalent and modern technology is nonexistent. The setting may be entirely fictitious in nature or based upon Earth with some additions. Unlike dark fiction, ...
with the minks as villains and the weasels and other indigenous animals as heroes.


See also

*
Aleutian disease Aleutian disease, also known as mink plasmacytosis, is a disease which causes spontaneous abortion and death in minks and ferrets. It is caused by ''Carnivore amdoparvovirus 1'' (also known as ''Aleutian disease virus'', ADV), a highly contag ...
*
European mink The European mink (''Mustela lutreola''), also known as the Russian mink and Eurasian mink, is a semiaquatic species of mustelid native to Europe. It is similar in colour to the American mink, but is slightly smaller and has a less specialized ...
*
Sea mink The sea mink (''Neogale macrodon'') is a recently extinct species of mink that lived on the eastern coast of North America around the Gulf of Maine on the New England seaboard. It was most closely related to the American mink (''Neogale vison'' ...
*
Fur farming Fur farming is the practice of breeding or raising certain types of animals for their fur. Most of the world's farmed fur is produced by European farmers. In 2018, there were 5,000 fur farms in the EU, all located across 22 countries; these ...


References


Notes


Bibliography

* * * * * * * * * * * *


External links

* Laura Bonesia, Santiago Palazon, 2007
The American mink in Europe: Status, impacts, and control

Smithsonian Institution – North American Mammals: Neovison vison



Mink Control Project Scottish Invasive Species Initiative
{{Taxonbar, from=Q27179 Mink, American Mammals described in 1777 Mink, American Taxa named by Johann Christian Daniel von Schreber Semiaquatic mammals Taxobox binomials not recognized by IUCN