ANALYSIS OF RESORPTION IN THE PUMPKINSEEDS LEPOMIS GIBBOSUS (LINNAEUS, 1758) (CENTRARCHIDAE, PERCIFORMES) OVARIES
Journal Title: Водні біоресурси та аквакультура - Year 2018, Vol 2, Issue
Abstract
Presented results of histological studies of resorption of oocytes in the gonads of the pumpkinseed Lepomis gibbosus (Linnaeus, 1758) (Centrarchidae, Perciformes) of the Samara Bay of Zaporizhzhya (Dnipro) reservoir. It was determined that in the summer of 2018 in the hydroecological conditions of the bay 7.5% of the investigated females were exposed to mass resorption. In the studied individuals in gonads were present oocytes of four phases of development: C – oocytes in the phase of single – layer follicle (52.59%), D – oocytes in the phase of vacuolization (15.13%), E – oocytes in the phase of accumulation of yolk (18.37%), and mature oocytes of phase F, which were subjected to mass resorption of 13.92%. It was established that the defining oocytes undergoing resorption were characterized by the largest sizes – the diameter of their cells was 829.60 ± 153.74 microns, and the area of oocytes was 558.51 ± 191.09 thousand microns. As a normal physiological process, resorption occurs in all species of fish after spawning. Violation of spawning conditions usually results in mass resorption – all oocytes prepared for ovulation were frontally resorbed, which occurred in experimental females of the pumpkinseed in the summer of 2018.
Authors and Affiliations
О. М Маренков, О. С. Нестеренко
Keywords
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