Morphological characters of lake forms of salmonid fishes of the genera Salmo and Oncorhynchus (Pisces: Salmonidae)

The Soviet Union played the leading role in fish introductions in Eurasia. However, only 3% of all introductions prior to 1978 gave a commercial benefit. One of the noteworthy examples appears to be the Sevan trout (Salmo ischchan Kessler, 1877)-an endemic salmonid of Lake Sevan in Armenia. This species has been introduced to Kirghizstan, Kazakhstan, and Uzbekistan, however, only the Kirghiz population has persisted in relatively high numbers. In this paper we provide the first extensive molecular study of S. ischchan using samples from the native population from Lake Sevan and three hatcheries in Armenia, as well as from the population introduced to Lake Issyk Kul in Kirghizstan. The Kirghiz population has been isolated since the introductions took place in 1930 and 1936. Our results, based on 11 nuclear microsatellites and a 905 bp fragment of the mitochondrial control region suggest that hatcheries have maintained genetic variability by way of ongoing translocations of individuals from Lake Sevan. Simultaneously, significant Garza-Williamson M-values suggest that bottlenecks could have reduced the genetic variability of the wild populations in the past. This hypothesis is supported by historical data, indicating highly manipulated waterlevel regulations and poaching as two main factors that dramatically impact fish abundance in the lake. On the other hand, a similar situation has been observed in Kirghizstan, but this population likely rebounded from small population size faster than the other populations examined. The Kirghiz population is significantly genetically differentiated from the other groups and have morphological features and biological attributes not observed in the source population. Genetic data imply that the effective population size in the native population is lower than that found in the introduced population, suggesting that some active protection of the Lake Sevan population may be needed urgently.

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Ichthyological Collection of D. K. Tretiakov in the National Museum of Natural History, NAS of Ukraine

Kovalchuk¹,

Chervonenko²

2016

Proc. Natl. Mus. Nat. Hist.

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Національний науково-природничий музей, Національна академія наук України (Київ, Україна) Ichthyological Collection of D. K. Tretiakov in the National Museum of Natural History, NAS of Ukraine.-Kovalchuk, O. M., Chervonenko, O. V.-The article deals with results of studying of the ichthyological collection belonging to the famous Ukrainian zoologist and morphologist, academician D. K. Tretiakov. It has been recently found in funds of the National Museum of Natural History, NAS of Ukraine. Systematic composition of macerated specimens of cartilaginous and ray-finned fishes was revised (in total 51 species belonging to 44 genera, 21 families and 14 orders), as well as some taxonomic issues were clarified (e.g., species and generic affiliation of the samples were specified) and the formation history of this collection by D. K. Tretiakov was traced. This assembly dated 1941 to 1950. A part of the samples was obtained during D. K. Tretiakov's stay in Ufa (1941-1944), while some specimens may have been extracted from other places (Far East, Barents, the Black and North Seas), and transferred later to the scientist for processing. The main part of the D. K. Tretiakov's collection is presented by fish samples caught in Ukrainian water bodies and along the coast of the Black and Azov Seas. Particular attention is paid to the contribution of D. K. Tretiakov to the development of domestic ichthyology.

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Morphological characters of lake forms of salmonid fishes of the genera Salmo and Oncorhynchus (Pisces: Salmonidae)

Cited by 6 publications

References 3 publications

Ichthyofauna of the Fresh and Brackish Waters of Russia and Adjacent Areas: Annotated List with Taxonomic Comments. 3. Orders Siluriformes–Syngnathiformes

Ichthyofauna of the Fresh and Brackish Waters of Russia and Adjacent Areas: Annotated List with Taxonomic Comments. 3. Orders Siluriformes–Syngnathiformes

Fish introductions in the former Soviet Union: The Sevan trout (Salmo ischchan) — 80 years later

Ichthyological Collection of D. K. Tretiakov in the National Museum of Natural History, NAS of Ukraine

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