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Abstract <p>This study presents an analysis of the current species composition and the main quantitative characteristics of higher crustaceans in water bodies of the Middle and Lower Volga River and the Kama River. The dominance of amphipods in all studied water bodies is revealed, among which <i>Dikerogammarus haemobaphes</i> (Eichwald, 1841); <i>Pontogammarus robustoides</i> (Sars, 1894); and <i>Chelicorophium curvispinum</i> Sars, 1895 occur most frequently and in mass. The amphipods are categorized into three ecomorphs according to morphology and the type of substrate: clingers, crawlers, and diggers, with crawlers dominating in most of the studied water bodies. It was noted that the diggers lead predominantly isolated lives, and cohabitation with other members of the class Malacostraca is sporadic. It is also noted that, despite the relatively rare occurrence of mysids and cumaceans, they form the maximum number of statistically significant cenotic relationships with other crustacean species.</p>

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Higher Crustaceans (Malacostraca, Arthropoda) in the Volga and Kama Rivers

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • E. M. Kurina

摘要

Abstract

This study presents an analysis of the current species composition and the main quantitative characteristics of higher crustaceans in water bodies of the Middle and Lower Volga River and the Kama River. The dominance of amphipods in all studied water bodies is revealed, among which Dikerogammarus haemobaphes (Eichwald, 1841); Pontogammarus robustoides (Sars, 1894); and Chelicorophium curvispinum Sars, 1895 occur most frequently and in mass. The amphipods are categorized into three ecomorphs according to morphology and the type of substrate: clingers, crawlers, and diggers, with crawlers dominating in most of the studied water bodies. It was noted that the diggers lead predominantly isolated lives, and cohabitation with other members of the class Malacostraca is sporadic. It is also noted that, despite the relatively rare occurrence of mysids and cumaceans, they form the maximum number of statistically significant cenotic relationships with other crustacean species.