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Procambarus
''Procambarus'' is a genus of crayfish in the family Cambaridae, all native to North and Central America. It includes a number of troglobitic species, and the marbled crayfish (''marmorkrebs''), which is parthenogenetic. Originally described as a subgenus for four species, it now contains around 161 species. Biogeography The majority of the diversity is found in the southeastern United States, but the genus extends as far south as Guatemala and Honduras, and on the Caribbean island of Cuba. After United States, the highest diversity is in Mexico with about 45 species. Only two are native to Guatemala (''P. pilosimanus'' and ''P. williamsoni''), one to Belize (''P. pilosimanus''), one to Honduras (''P. williamsoni'') and three to Cuba (''P. atkinsoni'', ''P. cubensis'' and ''P. niveus''). Subgenus ''Ortmannicus'' was the most widespread, with the range of ''Procambarus acutus'' extending as far north as the Great Lakes and New England, as well as south into northeastern Mexico; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procambarus Lagniappe
''Procambarus'' is a genus of crayfish in the family Cambaridae, all native to North and Central America. It includes a number of troglobitic species, and the marbled crayfish (''marmorkrebs''), which is parthenogenetic. Originally described as a subgenus for four species, it now contains around 161 species. Biogeography The majority of the diversity is found in the southeastern United States, but the genus extends as far south as Guatemala and Honduras, and on the Caribbean island of Cuba. After United States, the highest diversity is in Mexico with about 45 species. Only two are native to Guatemala (''P. pilosimanus'' and ''P. williamsoni''), one to Belize (''P. pilosimanus''), one to Honduras (''P. williamsoni'') and three to Cuba (''P. atkinsoni'', ''P. cubensis'' and ''P. niveus''). Subgenus ''Ortmannicus'' was the most widespread, with the range of ''Procambarus acutus'' extending as far north as the Great Lakes and New England, as well as south into northeastern Mexico ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procambarus Sp Larvae-1
''Procambarus'' is a genus of crayfish in the family Cambaridae, all native to North and Central America. It includes a number of troglobitic species, and the marbled crayfish (''marmorkrebs''), which is parthenogenetic. Originally described as a subgenus for four species, it now contains around 161 species. Biogeography The majority of the diversity is found in the southeastern United States, but the genus extends as far south as Guatemala and Honduras, and on the Caribbean island of Cuba. After United States, the highest diversity is in Mexico with about 45 species. Only two are native to Guatemala (''P. pilosimanus'' and ''P. williamsoni''), one to Belize (''P. pilosimanus''), one to Honduras (''P. williamsoni'') and three to Cuba (''P. atkinsoni'', ''P. cubensis'' and ''P. niveus''). Subgenus ''Ortmannicus'' was the most widespread, with the range of ''Procambarus acutus'' extending as far north as the Great Lakes and New England, as well as south into northeastern Mexico; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procambarus Acutus
''Procambarus acutus'', the white river crayfish, is a species of crayfish in the family Cambaridae. It is found in North America and Europe. The IUCN conservation status of ''Procambarus acutus'' is "LC", least concern, with no immediate threat to the species' survival. The IUCN status was reviewed in 2010. Subspecies These two subspecies belong to the species ''Procambarus acutus'': * ''Procambarus acutus acutus'' (Girard, 1852) (white river crayfish) * ''Procambarus acutus cuevachicae'' (Hobbs, 1941) Distribution Native ''Procambarus acutus'' is native to parts of the United States. It has a disjunct native distribution which includes the Atlantic Slope, as well as the southern Great Lakes drainages to the Gulf of Mexico. On the Atlantic Slope, P. acutus occurs from Maine to Georgia into Canada. Procambarus acutus also occurs from southern Wisconsin and Michigan through Kentucky and Missouri to western Texas and the Florida panhandle. Introduced ''Procambarus acutus'' has sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marbled Crayfish
The marbled crayfish or (''Procambarus virginalis'') is a parthenogenetic crayfish that was discovered in the pet trade in Germany in 1995. Marbled crayfish are closely related to the "slough crayfish", '' Procambarus fallax'', which is widely distributed across Florida. No natural populations of marbled crayfish are known. Information provided by one of the original pet traders as to where the marbled crayfish originated was deemed "totally confusing and unreliable". The informal name ''Marmorkrebs'' is German for "marbled crayfish". Model organism Marbled crayfish are the only known decapod crustaceans to reproduce only by parthenogenesis. All individuals are female, and the offspring are genetically identical to the parent. Marbled crayfish are triploid animals with 276 chromosomes, which may be the main reason for their parthenogenetic reproduction. It is hypothesized that marbled crayfish originated from an error in meiosis resulting in a diploid gamete, which was then fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Troglobitic
A troglobite (or, formally, troglobiont) is an animal species, or population of a species, strictly bound to underground habitats, such as caves. These are separate from species that mainly live in above-ground habitats but are also able to live underground (eutroglophiles), and species that are only cave visitors (subtroglophiles and trogloxenes). Land-dwelling troglobites may be referred to as troglofauna, while aquatic species may be called stygofauna, although for these animals the term ''stygobite'' is preferable. Troglobites typically have evolutionary adaptations to cave life. Examples of such adaptations include slow metabolism, reduced energy consumption, better food usage efficiency, decrease or loss of eyesight (anophthalmia), and depigmentation (absence of pigment in the integument). Conversely, as opposed to lost or reduced functions, many species have evolved elongated Antenna (biology), antenna and Leg, locomotory appendages, in order to better move around and respo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procambarus Digueti
''Procambarus digueti'' is a species of fresh water crayfish in the genus ''Procambarus'' and in the family Cambaridae. It is endemic to tropical regions in the Pacific Coast of Mexico. It lives in shallow lakes where oxygen is plentiful and are the only decapod species in Mexico to live in waters 1,800 meters above sea level. ''P. digueti'' is believed to be one of the oldest species of Mexican crayfish due to its unusually low genetic variability between organisms and geographical evidence. It has experienced a greater amount of habitat loss than other crayfish species have in Mexico, leading to a decline in its populations and the IUCN Red List to deem it as an endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv .... References Cambaridae Freshwater crustac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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, mudbugs, baybugs or yabbies. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some species are found in brooks and streams, where fresh water is running, while others thrive in swamps, ditches, and paddy fields. Most crayfish cannot tolerate polluted water, although some species, such as ''Procambarus clarkii'', are hardier. Crayfish feed on animals and plants, either living or decomposing, and detritus. The term "crayfish" is applied to saltwater species in some countries. Terminology The name "crayfish" comes from the Old French word ' (Modern French '). The word has been modified to "crayfish" by association with "fish" (folk etymology). The largely American ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambaridae
The Cambaridae are the largest of the four families of freshwater crayfish, with over 400 Species. Most of the species in the family are native the United States east of the Great Divide and Mexico, but fewer range north to Canada, and south to Guatemala and Honduras. Three live on the island of Cuba. The species in the genus ''Cambaroides'' are the only found outside North America, as they are restricted to eastern Asia. A few species, including the invasive ''Procambarus clarkii'' and '' Faxonius rusticus'', have been introduced to regions far outside their native range (both in North America and other continents). Conversely, many species have tiny ranges and are seriously threatened; a few are already extinct. A 2006 molecular study suggested that the family Cambaridae may be paraphyletic, with the family Astacidae Astacidae is a family of freshwater crayfish native to Europe and western North America. The family is made up of four extant (living) genera: The genera '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parthenogenetic
Parthenogenesis (; from the Greek grc, παρθένος, translit=parthénos, lit=virgin, label=none + grc, γένεσις, translit=génesis, lit=creation, label=none) is a natural form of asexual reproduction in which growth and development of embryos occur in a gamete (egg or sperm) without combining with another gamete (e.g., egg and sperm fusing). In animals, parthenogenesis means development of an embryo from an unfertilized egg cell. In plants, parthenogenesis is a component process of apomixis. In algae, parthenogenesis can mean the development of an embryo from either an individual sperm or an individual egg. Parthenogenesis occurs naturally in some plants, algae, invertebrate animal species (including nematodes, some tardigrades, water fleas, some scorpions, aphids, some mites, some bees, some Phasmatodea and parasitic wasps) and a few vertebrates (such as some fish, amphibians, reptiles and birds). This type of reproduction has been induced artificially in a few spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eugène Louis Bouvier
Eugène Louis Bouvier (9 April 1856, in Saint-Laurent-en-Grandvaux – 14 January 1944, in Paris) was a French entomologist and carcinologist. Bouvier was a professor at the Muséum national d'histoire naturelle. Biography Following graduation at the normal school in Lons-le-Saunier, he taught classes in Ville-sous-la-Ferté, Clairvaux, Versailles (city), Versailles, Saint-Cloud and Villefranche-sur-Saône. From 1882 to 1887, he served as a "boursier" at the Muséum national d'histoire naturelle, where he studied with Alphonse Milne-Edwards (1835–1900) and Edmond Perrier (1844–1921). Together with Milne-Edwards, he worked on some of the crustaceans from the ''Travailleur'' and ''French aviso Talisman, Talisman'' expeditions (1880–1883). In 1887, he earned his doctorate in natural sciences with a dissertation involving Prosobranchia, prosobranch gastropods, ''Système nerveux, morphologie générale et classification des Gastéropodes prosobranches''. In 1889 he became an ass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knowledge And Management Of Aquatic Ecosystems
''Knowledge and Management of Aquatic Ecosystems'' is a peer-reviewed open access scientific journal covering management and conservation issues related to freshwater ecosystems. The journal publishes articles, short communications, reviews, comments and replies. It is published by EDP Sciences and the editor-in-chief is Daniel Gerdeaux ( INRA). The journal was established in 1928 as ''Bulletin Français de la Pêche et de la Pisciculture'' and obtained its current title in 2008. An editorial published in 2002 by the outgoing editor Erick Vigneux, celebrates the 75 year anniversary of the journal. In this celebratory editorial it is explained that 'Knowledge and management of aquatic ecosystems' was introduced as a subtitle for the journal name in 1996. Abstracting and indexing The journal is abstracted and indexed in: According to the ''Journal Citation Reports'', the journal has a 2017 impact factor of 1.525. New species first described in this journal Occasionally new speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Invasive Species
An invasive species otherwise known as an alien is an introduced organism that becomes overpopulated and harms its new environment. Although most introduced species are neutral or beneficial with respect to other species, invasive species adversely affect habitats and bioregions, causing ecological, environmental, and/or economic damage. The term can also be used for native species that become harmful to their native environment after human alterations to its food webfor example the purple sea urchin (''Strongylocentrotus purpuratus'') which has decimated kelp forests along the northern California coast due to overharvesting of its natural predator, the California sea otter (''Enhydra lutris''). Since the 20th century, invasive species have become a serious economic, social, and environmental threat. Invasion of long-established ecosystems by organisms is a natural phenomenon, but human-facilitated introductions have greatly increased the rate, scale, and geographic range of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
