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Amu Darya Sturgeon
The Amu Darya sturgeon or false shovelnose sturgeon (''Pseudoscaphirhynchus kaufmanni'') is a critically endangered species of fish in the family Acipenseridae. It is found in Turkmenistan, Uzbekistan, Tajikistan and perhaps Afghanistan. It inhabits quite shallow flowing waters that are turbid and muddy.Birstein, V.J.; J.R. Waldman; and W.E. Bemis, editors (1997). Sturgeon biodiversity and conservation, pp. 377–378, 381–382. Kluwer Academic Publishing. Appearance The Amu Darya sturgeon is a small sturgeon, but the largest species of ''Pseudoscaphirhynchus'', reaching up to in weight and in total length, excluding tail filament. It has a long, thin tail filament. For example, two individuals that both had a length of about excluding tail filament were and including tail filament. The species occurs in two morphs: a relatively large, light-coloured and late maturing morph, and a small, dark-coloured and early maturing morph. The small morph is roughly of similar size ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Fedorovich Kessler
Karl Fedorovich Kessler (19 November 1815 – 3 March 1881) was a German-Russian zoologist and author of zoological taxa signed ''Kessler'', who was mostly active in Kyiv, Ukraine. He conducted most of his studies of birds in Ukrainian regions of the Russian Empire: Kiev Governorate, Volyn Governorate, Kherson Governorate, Poltava Governorate and Bessarabia. He also studied the fish of the Dniester, Dnieper, and Southern Bug rivers, and on the Ukrainian coast of the Black Sea. Kessler was one of the first zoologists to propose that mutual aid, rather than mutual struggle, was the main factor in the evolution of a species. The anarchist Peter Kropotkin later developed this theory in his book '' Mutual Aid: A Factor of Evolution''. Tribute The Kessler's gudgeon ''(Romanogobio kesslerii)'' was named after him. See also * :Taxa named by Karl Kessler *Antoine Laurent Apollinaire Fée *Jean-Charles Houzeau *Alphonse Toussenel Alphonse Toussenel (March 17, 1803 – April 30, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kerki
Kerki is a city in and capital of Kerki District, Lebap Province, Turkmenistan. It was formerly known as Zamm and, between 1999 and 2017, as Atamyrat. Geography It is situated on a plain on the left bank of the Amu Darya river. Nearby towns and villages include Mukry (3.3 nm), Amydarýa (2.1 nm), Surhy (3.1 nm) and Kerkichi (2.2 nm). Etymology According to Atanyyazow, the name Kerki is most likely of Persian origin, from ''ker'' ("fortress") and ''kuh'' ("mountain"), meaning "fortress on a mountain". However, Muqaddasī and de Goeje assert it is a Turkified pronunciation of the Persian name Karkuh (کرکوه), meaning "deaf mountain". The ancient name, Zamm, is of obscure origin. On 29 December 1999, by Parliamentary Resolution HM-60, the city and district of Kerki were renamed Atamyrat in honor of Atamyrat Nyýazow, father of Saparmurat Niyazov, who had worked in Kerki as a teacher before being killed in World War II. On 25 November 2017, by Parliam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaphirhynchinae
Sturgeon is the common name for the 27 species of fish belonging to the family Acipenseridae. The earliest sturgeon fossils date to the Late Cretaceous, and are descended from other, earlier acipenseriform fish, which date back to the Early Jurassic period, some 174 to 201 million years ago. They are one of two living families of the Acipenseriformes alongside paddlefish (Polyodontidae). The family is grouped into four genera: '' Acipenser'' (which is paraphyletic, containing many distantly related sturgeon species), ''Huso'', ''Scaphirhynchus,'' and '' Pseudoscaphirhynchus''. Two species ('' A. naccarii'' and '' A. dabryanus'') may be extinct in the wild, and one ('' P. fedtschenkoi'') may be entirely extinct. Sturgeons are native to subtropical, temperate and sub-Arctic rivers, lakes and coastlines of Eurasia and North America. Sturgeons are long-lived, late-maturing fishes with distinctive characteristics, such as a heterocercal caudal fin similar to those of sharks, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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