Parasites of graylings (Thymallidae: Thymallus) from the northern continental coast of the Okhotsk Sea
https://doi.org/10.26428/1606-9919-2020-200-965-977
Abstract
For the first time, generalized data on parasites of two subspecies of arctic grayling (Thymallus arcticus pallasi and Th. a. mertensi) from the largest salmon rivers of the northern coast of the Okhotsk Sea, as the Taui, Yama and Gizhiga, are presented. In total, 39 species of parasites are found including 38 helminth species belonging to 26 genera, 19 families, 5 classes and 3 types (Plathelminthes, Nemathelminthes, and Acanthocephales), and 1 parasitic copepod (Crustacea; Arthropoda). Among the flatworms, trematodes have the highest species diversity — 19 species belonged to 8 genera of 6 families, and cestodes are presented by 6 species (6 genera of 5 families). Nematodes are presented by 8 species (8 genera of 5 families), and acanthocephalans — by 5 species (4 genera, 3 families, 2 classes). The graylings parasites are distributed with 2 ecological groups: the freshwater parasites including 29 species (4 cestodes, 16 trematodes, 5 nematodes, 3 acanthocephalans, and 1 copepod) and the marine parasites including 10 species (2 cestodes, 3 trematodes, 3 nematodes, and 2 acanthocephalans). Th. a. mertensi from the Taui River basin is distinguished by the highest diversity of parasites (32 species), their high diversity is observed for the same species from the Gizhiga (20 species), and for Th. a. pallasi from the Yama (24 species), as well. More than a half of helminths (22 species) are noted by medical and veterinary importance and/or are able to spoil organoleptic properties of the seafood.
About the Authors
V. V. Pospekhov
Institute of Biological Problems of the North FEB RAS
Russian Federation
Russian Federation
Pospekhov Vitaly V., senior researcher
18, Portovaya Str., Magadan, 685000
G. I. Atrashkevich
Institute of Biological Problems of the North FEB RAS
Russian Federation
Russian Federation
Atrashkevich Gennady I., Ph.D., head of laboratory
18, Portovaya Str., Magadan, 685000
O. M. Orlovskaya
Institute of Biological Problems of the North FEB RAS
Russian Federation
Russian Federation
Orlovskaya Olga M., Ph.D., senior researcher
18, Portovaya Str., Magadan, 685000
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1. Паразиты хариусов (Thymallidae: Thymallus) северной части материкового побережья Охотского моря | |
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Pospekhov V.V., Atrashkevich G.I., Orlovskaya O.M. Parasites of graylings (Thymallidae: Thymallus) from the northern continental coast of the Okhotsk Sea. Izvestiya TINRO. 2020;200(4):965-977. (In Russ.) https://doi.org/10.26428/1606-9919-2020-200-965-977
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