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Abyssocottus
''Abyssocottus'' is a genus of ray-finned fishes belonging to the family Cottidae, the typical sculpins. These sculpins are endemic to Lake Baikal in Russia. Taxonomy ''Abyssocottus'' was first proposed as a genus by the Russian ichthyologist Lev Berg with ''Abyssocottus korotneffi'' designated as its type species. The 5th edition of ''Fishes of the World'' classified this genus within the subfamily Abyssocottinae. However, other authorities have used phylogenetic studies which have found that Baikal sculpins that were classified in the subfamilies Comephorinae and Abyssocottinae by ''Fishes of the World'' radiated from an ancestor which was likely to be within the genus '' Cottus'' and that the classification of the Baikal sculpins in a different taxon from ''Cottus'' was paraphyletic. Species There are currently three recognized species in this genus: * '' Abyssocottus elochini'' Taliev, 1955 * ''Abyssocottus gibbosus ''Abyssocottus gibbosus'' is a species of ray ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abyssocottus
''Abyssocottus'' is a genus of ray-finned fishes belonging to the family Cottidae, the typical sculpins. These sculpins are endemic to Lake Baikal in Russia. Taxonomy ''Abyssocottus'' was first proposed as a genus by the Russian ichthyologist Lev Berg with ''Abyssocottus korotneffi'' designated as its type species. The 5th edition of ''Fishes of the World'' classified this genus within the subfamily Abyssocottinae. However, other authorities have used phylogenetic studies which have found that Baikal sculpins that were classified in the subfamilies Comephorinae and Abyssocottinae by ''Fishes of the World'' radiated from an ancestor which was likely to be within the genus '' Cottus'' and that the classification of the Baikal sculpins in a different taxon from ''Cottus'' was paraphyletic. Species There are currently three recognized species in this genus: * '' Abyssocottus elochini'' Taliev, 1955 * ''Abyssocottus gibbosus ''Abyssocottus gibbosus'' is a species of ray ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abyssocottus Gibbosus
''Abyssocottus gibbosus'' is a species of ray-finned fish belonging to the family Cottidae, the typical sculpins. These sculpins are endemic to Lake Baikal Lake Baikal (, russian: Oзеро Байкал, Ozero Baykal ); mn, Байгал нуур, Baigal nuur) is a rift lake in Russia. It is situated in southern Siberia, between the federal subjects of Irkutsk Oblast to the northwest and the Repu ... in Russia. It dwells at a depth range of 400–1600 metres. Males can reach a maximum total length of 14 centimetres. References gibbosus Fish described in 1906 Fish of Lake Baikal Taxa named by Lev Berg {{Scorpaeniformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abyssocottus Elochini
''Abyssocottus elochini'' is a species of ray-finned fish belonging to the family Cottidae, the typical sculpins. These sculpins are endemic to Lake Baikal Lake Baikal (, russian: Oзеро Байкал, Ozero Baykal ); mn, Байгал нуур, Baigal nuur) is a rift lake in Russia. It is situated in southern Siberia, between the federal subjects of Irkutsk Oblast to the northwest and the Repu ... in Russia. It is known to dwell at a depth range of 250–300 metres. References elochini Fish described in 1955 Taxa named by Dmitrii Nikolaevich Taliev Fish of Lake Baikal {{Scorpaeniformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abyssocottus Korotneffi
''Abyssocottus korotneffi'' is a species of ray-finned fish belonging to the family Cottidae, the typical sculpins. These sculpins are endemic to Lake Baikal in Russia. It is known to dwell at a depth range of , most commonly between . Males can reach a maximum total length of and females . Maximum age is 12 years. Females harbour about 20 eggs in each ovary The ovary is an organ in the female reproductive system that produces an ovum. When released, this travels down the fallopian tube into the uterus, where it may become fertilized by a sperm. There is an ovary () found on each side of the body. .... ''A. korotneffi'' feeds predominantly on debris and amphipod crustaceans. References korotneffi Fish described in 1906 Taxa named by Lev Berg Fish of Lake Baikal {{Scorpaeniformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abyssocottinae
The Abyssocottinae are a subfamily of ray-finned fishes in the family Cottidae, the sculpins. They are known commonly as the deep-water sculpins.Froese, R. and D. Pauly. (Eds.Abyssocottidae.FishBase. 2011. The entire family is endemic to Lake Baikal in Siberia.Hunt, D. M., et al. (1997)Molecular evolution of the cottoid fish endemic to Lake Baikal deduced from nuclear DNA evidence.''Molecular Phylogenetics and Evolution'' 8(3), 415–22. Sculpins of this subfamily mostly live in deep water, below . There are 24 known species in seven genera. These include, for instance, '' Abyssocottus korotneffi'' and ''Cottinella boulengeri'' which are among the deepest-living freshwater fish. Baikal is the deepest lake on Earth () and sculpins occupy even its greatest depths. Evolution and systematics Molecular studies based on mitochondrial DNA suggest that the Abyssocottinae along with other Lake Baikal cottoid fishes, now attributed to the likewise endemic Cottocomephorinae (Baikal scul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dmitrii Nikolaevich Taliev
Dmitrii Nikolaevich Taliev (28 May 1908 – 2 July 1952) was a Soviet Russian ichthyologist and limnologist, notable for his work on the Lake Baikal. Notable Dates (includes list of publications and short biography) * 1930 - Senior Assistant, Pacific Research Institute of Fisheries and Oceanography * 1932 - Began his work at the Baikal Limnological Research Station of the Academy of Sciences of the USSR (now Limnological Institute of the Siberian Division of the Russian Academy of Sciences) ** 1932-death, except 1939-41, - Senior Researcher, often executing duties of Deputy Director. ** 1944-47 - Director * 1939-41 - Head of the laboratory of Experimental Systematics at the Zoological Institute of the Academy of Sciences of the USSR Biography Taliev was born in 1908. His mother was a teacher at an elementary school and his father, an electrical engineer. He developed an interest in zoology early in life. At high school he was a member of the young naturalist club, and later a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetics
In biology, phylogenetics (; from Greek language, Greek wikt:φυλή, φυλή/wikt:φῦλον, φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by Computational phylogenetics, phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, Protein, protein Amino acid, amino acid sequences, or Morphology (biology), morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. The tips of a phylogenetic tree can be living taxa or fossils, and represent the "end" or the present time in an evolutionary lineage. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the tree. An un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Of Lake Baikal
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] |
Scorpaeniformes Genera
The Scorpaeniformes are a diverse order of ray-finned fish, including the lionfishes and sculpins, but have also been called the Scleroparei. It is one of the five largest orders of bony fishes by number of species, with over 1,320. They are known as "mail-cheeked" fishes due to their distinguishing characteristic, the suborbital stay: a backwards extension of the third circumorbital bone (part of the lateral head/cheek skeleton, below the eye socket) across the cheek to the pre operculum, to which it is connected in most species. Scorpaeniform fishes are carnivorous, mostly feeding on crustaceans and on smaller fish. Most species live on the sea bottom in relatively shallow waters, although species are known from deep water, from the midwater, and even from fresh water. They typically have spiny heads, and rounded pectoral and caudal fins. Most species are less than in length, but the full size range of the order varies from the velvetfishes belonging to the family Aploacti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyletic
In taxonomy (general), taxonomy, a group is paraphyletic if it consists of the group's most recent common ancestor, last common ancestor and most of its descendants, excluding a few Monophyly, monophyletic subgroups. The group is said to be paraphyletic ''with respect to'' the excluded subgroups. In contrast, a monophyletic group (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of Synapomorphy and apomorphy, synapomorphies and symplesiomorphy, symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term was coined by Willi Hennig to apply to well-known taxa like Reptilia (reptiles) which, as commonly named and traditionally defined, is paraphyletic with respect to mammals and birds. Reptilia contains the last common ancestor of reptiles a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cottus (fish)
''Cottus'' is a genus of the mainly freshwater ray-finned fishes belonging to the family Cottidae, the typical sculpins. They are often referred to as the "freshwater sculpins", as they are the principal genus of sculpins to be found in fresh water. They are native to the Palearctic and Nearctic. They are small fish, mostly less than in length, although a few species can reach twice that size. Taxonomy ''Cottus'' was first proposed as a genus by Carl Linnaeus in the 10th edition of the ''Systema Naturae'' when he described the European bullhead (''Cottus gobio'') and in 1850 this species was designated as the type species of the genus by the French ichthyologist Charles Frédéric Girard. The 5th edition of the ''Fishes of the World'' classifies this genus within the subfamily Cottinae of the family Cottidae. Other authorities have found that the Cottidae, as delimited in the 5th edition of Fishes of the World, is paraphyletic and that the monophyletic grouping is the freshwate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lev Berg
Lev Semyonovich Berg, also known as Leo S. Berg (russian: Лев Семёнович Берг; 14 March 1876 – 24 December 1950) was a leading Russian geographer, biologist and ichthyologist who served as President of the Soviet Geographical Society between 1940 and 1950. He is known for his own evolutionary theory, nomogenesis (a form of orthogenesis incorporating mutationism) as opposed to the theories of Darwin and Lamarck. Life Lev Berg was born in Bessarabia in a Jewish family, the son of Simon Gregoryevich Berg, a notary, and Klara Lvovna Bernstein-Kogan. He graduated from the Second Kishinev Gymnasium in 1894. Like some of his relatives, Berg converted to Christianity in order to pursue his studies at Moscow State University. At Moscow University, Berg studied hydrobiology and geography. He later studied ichthyology and in 1928 was awarded he was also a member of the Russian Academy of Sciences. Lev Berg graduated from the Moscow State University in 1898. Between 190 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
