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Gigantactis Kreffti
''Gigantactis kreffti'' is a species of fish in the whipnose angler (Gigantactinidae) family, first described in 1981 by Erik Bertelsen, Theodore Wells Pietsch III and Robert J. Lavenberg. The species epithet, ''kreffti'', honours the ichythyologist, Gerhard Krefft. The species has seven soft dorsal rays and six soft anal rays, and is found in the territorial waters of Australia, Japan, Saint Helena, Ascension and Tristan da Cunha, and South Africa, at depths of 500 to 2,000 m. In Australia, it is found in waters south of Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdi .... The largest specimen measured had a standard length of 34.5 cm. References Further reading *Stewart, A.L. and Pietsch, T.W. 2015. Family Gigantactinidae. In: Roberts, C., Stewart, A.L. and Strut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erik Bertelsen
Erik Bertelsen (8 August 1912 – 18 March 1993) was a Danish ichthyologist, who specialised in deep sea fish. The fish, '' Diaphus bertelseni'' is named in his honour. He studied biology at the University of Copenhagen (1930 -) and in 1937 started work on the Dana collection at Charlottenlund Castle and also for the Danish Fisheries Investigation (DFI). He earned a doctorate in 1951 with his dissertation, ''The ceratioid fishes. Ontology, taxonomy, distribution and biology''. He was director of DFI from 1958 to 1971, when he resigned to work at the zoological museum of the University of Copenhagen, where with fewer administrative duties he was able to concentrate on his research on deep sea fish. In 1961 he was made a Knight of the Order of the Dannebrog. He authored over 50 taxa. See :Taxa named by Erik Bertelsen and wikidata query His zoological author abbreviation is Bertelsen. In 1932 he participated in a fisheries biology research trip to the Faroe Islands and Iceland. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodore Wells Pietsch III
Theodore Wells Pietsch III (born March 6, 1945) is an American systematist and evolutionary biologist especially known for his studies of anglerfishes. Pietsch has described 72 species and 14 genera of fishes and published numerous scientific papers focusing on the relationships, evolutionary history, and functional morphology of teleosts, particularly deep-sea taxa. For this body of work, Pietsch was awarded the Robert H. Gibbs Jr. Memorial Award in Systematic Ichthyology by the American Society of Ichthyologists and Herpetologists in 2005. Pietsch has spent most of his career at the University of Washington in Seattle as a professor mentoring graduate students, teaching ichthyology to undergraduates, and curating the ichthyology collections of the UW Burke Museum of Natural History and Culture. His zoological author abbreviation is Pietsch. See also :Taxa named by Theodore Wells Pietsch III and query for taxa he authored Education Pietsch attended John Adams High School in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert J
The name Robert is an ancient Germanic given name, from Proto-Germanic "fame" and "bright" (''Hrōþiberhtaz''). Compare Old Dutch ''Robrecht'' and Old High German ''Hrodebert'' (a compound of '' Hruod'' ( non, Hróðr) "fame, glory, honour, praise, renown" and ''berht'' "bright, light, shining"). It is the second most frequently used given name of ancient Germanic origin. It is also in use as a surname. Another commonly used form of the name is Rupert. After becoming widely used in Continental Europe it entered England in its Old French form ''Robert'', where an Old English cognate form (''Hrēodbēorht'', ''Hrodberht'', ''Hrēodbēorð'', ''Hrœdbœrð'', ''Hrœdberð'', ''Hrōðberχtŕ'') had existed before the Norman Conquest. The feminine version is Roberta. The Italian, Portuguese, and Spanish form is Roberto. Robert is also a common name in many Germanic languages, including English, German, Dutch, Norwegian, Swedish, Scots, Danish, and Icelandic. It can be use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whipnose Angler
The whipnose anglers are a family, Gigantactinidae, of deep-sea anglerfishes. The family name is derived from the Greek words ''gigas'', meaning "big", and ''aktis'', meaning "ray". They are distinguished by the presence of a remarkably long lure (the illicium), which may be longer than the body of the fish. Description Whipnose angler females are easily recognizable because they have an elongated shape and a small head. Their illicium length is an average of one to four times the size of their standard length. The family includes 24 species in two genera. Like the other ceratioid groups, little is known about their ecology, but this species lives a benthic lifestyle while possibly swimming upside down while it is foraging. They tend to drift motionless to lure in their prey. Species of this family show extreme sexual dimorphism, with males being dwarves and females significantly larger. The maximum female size is 43.5 cm, with the corresponding male being 2.2 cm. Loc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerhard Krefft
Gerhard Krefft (30 March 1912 - 20 March 1993) was a German ichthyologist and herpetologist.Stehmann & Hulley (1994). Family His father was a neurologist, who "was an enthusiastic collector of living reptiles and amphibians", and his mother was a concert singer.Stehmann & Hulley (1994), p.558. He and his wife Ingeborg were married in 1947, and they had three daughters.Stehmann & Hulley (1994), p.559. He was the great-nephew of the zoologist, palaeontologist, and Curator of the Australian Museum, Johann Ludwig (Louis) Gerard Krefft (1830–1881). Professional career He had more than 160 scientific publications, many of which were "milestone contributions to the taxonomy and zoogeography Zoogeography is the branch of the science of biogeography that is concerned with geographic distribution (present and past) of animal species. As a multifaceted field of study, zoogeography incorporates methods of molecular biology, genetics, mo ... of oceanic fishes".Stehmann & Hulley (199 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tasmania
) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_date = Colony of Tasmania , established_title2 = Federation , established_date2 = 1 January 1901 , named_for = Abel Tasman , demonym = , capital = Hobart , largest_city = capital , coordinates = , admin_center = 29 local government areas , admin_center_type = Administration , leader_title1 = Monarch , leader_name1 = Charles III , leader_title2 = Governor , leader_name2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deep Sea Fish
Deep-sea fish are fish that live in the darkness below the sunlit surface waters, that is below the epipelagic or photic zone of the sea. The lanternfish is, by far, the most common deep-sea fish. Other deep sea fishes include the flashlight fish, cookiecutter shark, bristlemouths, anglerfish, viperfish, and some species of eelpout. Only about 2% of known marine species inhabit the pelagic environment. This means that they live in the water column as opposed to the benthic organisms that live in or on the sea floor. Deep-sea organisms generally inhabit bathypelagic (1000–4000m deep) and abyssopelagic (4000–6000m deep) zones. However, characteristics of deep-sea organisms, such as bioluminescence can be seen in the mesopelagic (200–1000m deep) zone as well. The mesopelagic zone is the disphotic zone, meaning light there is minimal but still measurable. The oxygen minimum layer exists somewhere between a depth of 700m and 1000m deep depending on the place in the ocean. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioluminescent Fish
Bioluminescence is the production and emission of light by living organisms. It is a form of chemiluminescence. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms including some bioluminescent bacteria, and terrestrial arthropods such as fireflies. In some animals, the light is bacteriogenic, produced by symbiotic bacteria such as those from the genus ''Vibrio''; in others, it is autogenic, produced by the animals themselves. In a general sense, the principal chemical reaction in bioluminescence involves a light-emitting molecule and an enzyme, generally called luciferin and luciferase, respectively. Because these are generic names, luciferins and luciferases are often distinguished by the species or group, e.g. firefly luciferin. In all characterized cases, the enzyme catalyzes the oxidation of the luciferin. In some species, the luciferase requires other cofactors, such as calcium or magnesium ions, and sometime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Theodore Wells Pietsch III
In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the intro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Described In 1981
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 living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Most fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
