Morphofunctional Characteristics of the Ovaries of Pumpkinseed Lepomis gibbosus (Linnaeus, 1758) from the Kuchurgan Reservoir (Cooling Water Body of the Moldavian Regional Power Plant)
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FULGA, Nina; TODERASH, Ion; BULAT, Dumitru; BULAT, Denis; RAILYAN, Nadejda. Morphofunctional Characteristics of the Ovaries of Pumpkinseed Lepomis gibbosus (Linnaeus, 1758) from the Kuchurgan Reservoir (Cooling Water Body of the Moldavian Regional Power Plant). In: Russian Journal of Biological Invasions. 2019, nr. 1(10), pp. 74-78. ISSN 2075-1117.
10.1134/S2075111719010077
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Russian Journal of Biological Invasions
Numărul 1(10) / 2019 / ISSN 2075-1117 /ISSNe 2075-1125

Morphofunctional Characteristics of the Ovaries of Pumpkinseed Lepomis gibbosus (Linnaeus, 1758) from the Kuchurgan Reservoir (Cooling Water Body of the Moldavian Regional Power Plant)


DOI: 10.1134/S2075111719010077
Pag. 74-78

Fulga Nina, Toderash Ion, Bulat Dumitru, Bulat Denis, Railyan Nadejda
 
Institute of Zoology
 
Disponibil în IBN: 6 iunie 2019


Rezumat

Abstract: The results of studies of the reproductive system in sexually mature pumpkinseed Lepomis gibbosus (Linnaeus, 1758) (Centrarchidae) females during spawning in the Kuchurgan Reservoir (liman), the cooling water body of the Moldavian Regional Power Plant, are presented. Asynchronous development of germ cells in the ovary is characteristic of this invasive species. The females spawn three times in May–July, and the relative gonad weight decreases with each generation, so that the gonadоsomatic index before the second and third spawning is sequentially reduced. This is confirmed by the decrease of the weight of eggs and the relative gonad weight during the formation of the second and third egg cell portions within a specific breeding season. Females with severe impairments of gonad development were identified.

Cuvinte-cheie
fractional spawning, gonadosomatic index, GSI, oocyte generation, ovary maturity stage, pumpkinseed Lepomis gibbosus, resorption, sterile females, vitellogenesis