INFLUENCE OF HYDROLOGICAL AND HYDROCHEMICAL REGIMES ON SPECIES DIVERSITY AND BIOLOGICAL PARAMETERS OF GOBY FISH IN THE WESTERN PART OF THE NORTHERN CASPIAN-Reference-Cited by-同舟云学术

INFLUENCE OF HYDROLOGICAL AND HYDROCHEMICAL REGIMES ON SPECIES DIVERSITY AND BIOLOGICAL PARAMETERS OF GOBY FISH IN THE WESTERN PART OF THE NORTHERN CASPIAN

Published:2022-06-14 Issue:3 Volume:2022 Page:46-51
ISSN:0131-6184
Container-title:Fisheries
language:en
Short-container-title:

Author:

Gutsulyak Svetlana¹,Pomogaeva Tatiana²

Affiliation:

1. Astrakhan state University

2. Federal State Budgetary Scientific Institution "All-Russian Research Institute of Fisheries and Oceanography" Volga-Caspian Branch ("CaspNIRKh")

Abstract

Studies were carried out on the influence of the hydrological and hydrochemical regime on the species diversity and biological parameters of goby fish in the western part of the North Caspian in 2016-2018. It is shown that the species composition in these years was represented by 9 species, with a predominance of sand goby and bighead goby and with the increase in sea salinity, stenohaline fish began to appear: gray whip goby and Khvalyn goby, the number of the latter in catches increased in 2018 compared to 2017 by 16.8 times. The number and biomass of gobies in 2018 increased by 4 times compared to previous years and amounted to 2384 million copies, 16.807 thousand. t., respectively, as well as the improvement of their biological parameters, indicate the favorable state of the population, and hence the food supply for anadromous fish, in particular, sturgeon, semi-anadromous species, marine migratory herring.

Publisher

FSBI TSUREN

Subject

General Medicine

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