Genetical adaptation of common kilka Clupeonella cultriventris (Nordmann, 1840) (Actinopterygii: Clupeidae)

TL;DR

This study investigates the genetic diversity and adaptation mechanisms of the common kilka across its range, highlighting genetic uniformity and adaptations facilitating its expansion in northern water basins.

Contribution

It provides the first comprehensive analysis of genetic diversity, population structure, and ecological adaptations of Clupeonella cultriventris across its entire range.

Findings

Genetic diversity is uniform across the areal.

Adaptations support expansion into northern water basins.

Environmental factors influence genotype distribution.

Abstract

It is the first time, when genetic diversity and the common kilka population structure were investigated throughout the areal. Data about the species condition at the Upper Volga basins were updated accordingly to modern condition. Physiological and ecological adaptations to northern water basins were evaluated. Significance of interaction between some loci and the most important abiotic environmental factors at the selection was demonstrated. The results suggest that the common kilka Clupeonella cultriventris (Nordmann, 1840) is presented by uniform set of population throughout the areal. The successive expansion of the species through the cascade of the Volga's water reservoirs can be explained by complex of genetic and biochemical adaptation for sweet water habitat. It was supposed that the sweet water populations originated from Saratov's backwaters sweet water population. Seasonal fluctuations of abiotic and biotic environmental factors have significant influence on genotype distribution at the newly formed population. This book is intended for use by ichthyologists, ecologists, environmental protection and management of natural resources specialists. In Russian.