Spatial distribution, dimensional-mass and age structure of dab of the gloss Platichthys luscus population of Shabolatsk Liman

Authors

DOI:

https://doi.org/10.15587/2519-8025.2019.169657

Keywords:

Shabolatsk liman, ichthyocenosis formation, dab gloss, population, fatness, mass

Abstract

The Shabolatsk liman is situated in the Southern-Western Black Sea side and relates to the type of semi-open, saline-water liman-lagoons.

Since the middle ХХ century essential changes have occurred in the liman hydroecosystem that resulted in the essential transformation of the basin biota.

The aim of the study was in revealing changes in the spatial distribution, dimensional-mass and age structure of the population of dab gloss Platichthys luscus in the Shabolatsk liman.

The composition and population structure of ichthyocenosis of Shabolatsk liman, bio-ecological characteristics of most mass types of fish on the example of dab gloss were studied.

The studies of the spatial distribution of the population of dab gloss Platichthys luscus in the Shabolatsk liman demonstrated that gloss fattens along the whole liman water area, but in the autumn-winter period concentrates in the deep-water saline Southern-Western part of the liman.

The conducted studies of the dimensional-mass and age structure of the Platichthys luscus population in the Shabolatsk liman allowed to establish that the population was presented by five age groups like in the previous period, but the share of fishes of the older age decreased.

Dimensional-mass indices and fatness of dab decreased. It has been established, that the loss of the essential share of the spawning herd in 1992, desalination and worsening of the fodder base resulted in the stable depression of the dab population in liman in the following years.

Taking into account food inclinations of Platichthys luscus (the base of gloss nutrition is mollusks, cancroids and fish (gobies and silversides)), at forming the polyculture in the Shabolatsk liman, dab gloss may be recommended as one of main consumers of zoobenthos that doesn’t come in food competition with other fish types

Author Biography

Maryna Burhaz, Odessa State Ecological University Lvivska str., 15, Odessa, Ukraine, 65016

PhD, Senior Lecturer

Department of Water Bioresources and Aquaculture

References

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Published

2019-07-11

How to Cite

Burhaz, M. (2019). Spatial distribution, dimensional-mass and age structure of dab of the gloss Platichthys luscus population of Shabolatsk Liman. ScienceRise: Biological Science, (2 (17), 18–23. https://doi.org/10.15587/2519-8025.2019.169657

Issue

No. 2 (17) (2019)

Section

Biological Sciences

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Copyright (c) 2019 Maryna Burhaz

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