Fish fauna of the Tendra Bay, the Yahorlyk Bay and the adjacent Black Sea waters

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Fish fauna of the Tendra Bay, the Yahorlyk Bay and the adjacent Black Sea waters

Journal Title: Naukovyi visnyk Chernivetskoho universytetu. Biolohiia (Biolohichni systemy) - Year 2018, Vol 10, Issue 1

Abstract

The research was carried out from 1989 to 2017 in the water areas of the Tenda Bay and the Yahorlyk Bay as well as in the adjacent water areas which constitute a part of the Black Sea washing the Kinburn Peninsula and the island of Tendra. The Tendra Bay consists of two different in shape, size and depth water areas: the western (deep) and the eastern (shallow). In general, all the water areas are composed of four almost separate from each other reservoirs which altogether have a homogeneous fish fauna containing a few differences. The water areas have been characterized in terms of their morphology, physics and ecology. The fish fauna of the water areas under investigation has been analysed briefly and retrospectively. The information on fishing quantities of the commercial fish species in the researched areas from 1981 to 2001 is published for the first time. The whole of these water areas research has been divided into three periods according to the duration of the research and the state of the fish fauna of these water areas. Brief retrospective and present-day analyses of the fish fauna and the changes in its quantitative and qualitative parameters have been given. The dynamics and the reasons for these changes have been described. The complete retrospective and up-to-date lists of the fish of the Tendra Bay, the Yahorlyk Bay and the adjacent Black Sea water areas covering the period of ichthyologic research up to 2017 have been provided. The complete lists of fish fauna of each of the water areas under investigation have been compiled separately, whereas previously there were collective lists of fish fauna of all the water areas altogether. The fact has been proved that the the fish fauna of the Tendra Bay, the Yahorlyk Bay and the ajacent Black Sea water areas totals 90 species of fish from 44 families. In its composition the fish fauna predominantly consists of sea fish species (65.5%). Euryhaline, anadromous, brackish water and freshwater species of fish in almost equal parts consitute another one third of its composition. 13 species of fish have been spotted for the first time over the period of our research in this area. 33 species of fish which are spotted annually constitute the core of the fish fauna of the water areas under investigation. 15 species of fish are the most numerous and they are the core of the fish fauna of these water areas. 58 species of fish was the record number of species spotted over a year in 2014 and 2016. Among the water areas under investigation the largest number of species of fish over all the periods of monitoring has been spotted in the Black Sea (81 species) and in the western part of the Tendra Bay (72 species). After analyzing the data of the prior research and our observations, we have concluded that the main body of the fish fauna in the Tendra Bay, the Yahorlyk Bay and the adjacent Black Sea water areas has not changed significantly over the period of almost 75 years.

Authors and Affiliations

P. V. Tkachenko

Keywords

Tendra and Yahorlyk bays the Black Sea ordinary mass-scale rare species fish fauna

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EP ID EP498780
DOI 10.31861/biosystems2018.01.047
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