Diversity of nosed charrs Salvelinus malma (Salmonidae) of Lake Kronotskoe (Kamchatka)


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详细

The littoral benthivorous charrs Salvelinus malma with subterminal mouth distributed in Lake Kronotskoe basin are separated into three distinct morphs. These morphs significantly differ in head proportions, jaws' length, skull structure, and degree of gill rakers' reduction. The morphs spawn in distant lake tributaries at the spawning grounds of various types. Joint spawning has never been observed for these morphs in any type of spawning grounds. The differences in the external morphology and growth rate of the morphs become evident during the riverine life stage. The adult charrs inhabit the same sites of the littoral zone. No reliable difference is found in the diet among morphs, since all nosed charrs dominantly feed on amphipods with the exception of a few individuals that fed on chironomid larvae.

作者简介

G. Markevich

Kronotsky Nature Reserve

编辑信件的主要联系方式.
Email: g-markevich@yandex.ru
俄罗斯联邦, Yelizovo, 684000

E. Esin

Kronotsky Nature Reserve; Russian Federal Research Institute of Fisheries and Oceanography (VNIRO)

Email: g-markevich@yandex.ru
俄罗斯联邦, Yelizovo, 684000; Moscow, 107140

O. Busarova

Far Eastern State Technical Fisheries University Dal’rybvtuz

Email: g-markevich@yandex.ru
俄罗斯联邦, Vladivostok, 690087

R. Knudsen

Department of Arctic and Marine Biology

Email: g-markevich@yandex.ru
挪威, Tromsø, 9019

L. Anisimova

Russian Federal Research Institute of Fisheries and Oceanography (VNIRO)

Email: g-markevich@yandex.ru
俄罗斯联邦, Moscow, 107140

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