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The State of the Population of the European Pearl Mussel Margaritifera Margaritifera (L.) (mollusca, margaritiferidae) in the Kozha River (the Onega River Basin, the European North of Russia). Pp. 51–57.

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Section: Biology

UDC

594.1

Authors

Bespalaya Julia Vladimirovna, Institute of Ecological Problems of the North of the Ural Branch of the Russian Academy of Sciences, 

Bolotov Ivan Nikolaevich, Institute of Ecological Problems of the North of the Ural Branch of the Russian Academy of Sciences, 

Makhrov Alexander Anatolyevich, A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, 

Dvoryankin Gennady Alexandrovich, Northern Branch of the Polar Research Institute of Marine Fisheries and Oceanography, 

Usacheva Olga Vladimirivna, Institute of Ecological Problems of the North of the Ural Branch of the Russian Academy of Sciences, 

Sokolova Svetlana Evgenyevna, Institute of Ecological Problems of the North of the Ural Branch of the Russian Academy of Sciences

Abstract

The research has shown that the population of the European pearl mussel in the river Kozha have survived, but its numbers are quite small, and the rates of renewal are low. The average density of the European pearl mussel in the river Kozha is 0.22±0.14 ind./m2. The proportion of young individuals of the European pearl mussel is only 1%. Presumably the low rate of reproduction of the European pearl mussel in the river Kozha is caused by decline in the population of Atlantic salmon.

Keywords

the Onega River basin, European pearl mussel, the Kozha River population, population characteristics, population density.

The full-text version of the article can be requested through the university’s library.