Kamchatka Research Institute of Fishery and Oceanography KamchatNIRO

Petropavlovsk-Kamchatskiy, Russia

Kamchatka Research Institute of Fishery and Oceanography KamchatNIRO

Petropavlovsk-Kamchatskiy, Russia

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Esin E.V.,Russian Federal Research Institute of Fisheries and Oceanography VNIRO | Myuge N.S.,Russian Federal Research Institute of Fisheries and Oceanography VNIRO | Koval' O.O.,Kamchatka Research Institute of Fishery and Oceanography KamchatNIRO | Sorokin Y.V.,Russian Federal Research Institute of Fisheries and Oceanography VNIRO
Journal of Ichthyology | Year: 2014

Charrs of the genus Salvelinus from the ultraoligotrophic Lake Dal’nee Maar differ from anadromous Dolly Varden S. malma in larger head with elongated jaws, larger gill cover, lower body with a deep caudal peduncle and short pelvic fins displaced anteriorly, larger number of scales in the lateral line, and larger number of rays in the unpaired fins. The lacustrine charrs also differ from the maternal Dolly Varden population in longer free part of the maxilla, lower widths of the opercular bones, and narrower suspensorium. Polymorphism of mtDNA is low, and unique haplotypes of the D-loop control region are not revealed. The life span of the lacustrine charrs reaches 11 years; and their maximum length and weight are 47 cm and 820 g. The spawning is registered in the fall at the slope of the bottom near the mouth of the single stream flowing into the lake. The abundance of the spawning group slightly exceeds 1000 individuals. This group is recruited from offspring migrating during their early life to the stream with limited food resources, and more numerous progeny remaining in the lake do not reach sexual maturity. The main food sources of adult charrs during summer are planktonic crustaceans, imago of insects, and own juveniles. © 2014, Pleiades Publishing, Ltd.


Zolotov O.G.,Kamchatka Research Institute of Fishery and Oceanography KamchatNIRO | Spirin I.Y.,Kamchatka Research Institute of Fishery and Oceanography KamchatNIRO | Zudina S.M.,Kamchatka Research Institute of Fishery and Oceanography KamchatNIRO
Journal of Ichthyology | Year: 2014

Data on the occurrence, spatial-bathymetric distribution, and size composition of skilfish Erilepis zonifer are given on the basis of the materials collected at the long-line catches on the Emperor Ridge seamounts. This fish is a large representative of fam. Anoplopomatidae (maximal length 188 cm; weight 88.5 kg). From June to July 2009, the species was found on all five sampled underwater mountains (Nintoku, Jingu, Ojin, Koko, Northern Koko). The fish was found within the depth range 370-1040 m. The initial biomass of skilfish at the studied seamounts calculated by the Leslie method is approximately 203.5 tons. The structure of the range and possible ways of the dispersion of this species in the waters of the continental slope of the North-Pacific rim are discussed. © 2014 Pleiades Publishing, Ltd.


Esin E.V.,Russian Research Institute of Fisheries and Oceanography VNIRO | Mugue N.S.,Russian Research Institute of Fisheries and Oceanography VNIRO | Koval' O.O.,Kamchatka Research Institute of Fishery and Oceanography KamchatNIRO | Sorokin Y.V.,Russian Research Institute of Fisheries and Oceanography VNIRO
Journal of Ichthyology | Year: 2015

The charrs of the genus Salvelinus from the upper part of the Shumnaya River basin forage in the shallow thermal lake, and make a downstream spawning migration to the river and its tributaries in early fall. The life span of the fishes is no longer than eleven years, maximum body length and weight reach 55 cm and 1.6 kg, respectively. The abundance of the spawning group is approximately 350–400 individuals. The population is characterized by the presence of single) haplotype of the Cyt b-D-loop region of mtDNA, which is found in Dolly Varden S. malma populations. The charrs of Lake Tsentral’noe and Lake Dal’nee are similar in morphology, and the origin of populations of the Uzon Caldera from a common ancestor is supposed. The charrs of Lake Tsentral’noe differ from anadromous Dolly Varden in larger head with elongated gill cover, deep caudal peduncle, larger number of rays in the unpaired fins, and larger number of pyloric caeca. Based on shapes of the skull bones, the isolated populations from the Uzon Caldera are characterized by narrow suspensorium, narrow head of the vomer, shortened anterior part of the parasphenoid, and elongated upper jaw. All observed differences are based on frequency distributions of the traits, and well-defined parameters for discrimination of the isolated populations and anadromous Dolly Varden are not revealed. © 2015, Pleiades Publishing, Ltd.

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