State of lake minnow, Eupallasella percnurus (Pall.), gonads during pre-spawning season _ preliminary results
2011
Hliwa, P.,University of Warmia and Mazury, Olsztyn (Poland). Dept. of Ichthyology | Wolnicki, J. | Krol, J. | Sikorska, J. | Kaminski, R.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Pond Fisheries | Ciereszko, A.,Polish Academy of Sciences, Olsztyn (Poland). Inst. of Animal Reproduction and Food Research, Dept. of Gamete and Embryo Biology
The analysis of the reproduction cycle of sexually mature of lake minnow, Eupallasella percnurus (Pall.), was studied. The histological analysis of E. percnurus ovaries during the pre-spawning season revealed apparent asynchronicity in the maturation of oocytes. A few (3-4) ova fractions were found in gonads, they were heterogeneous in terms of maturity stages. Single oogonia, previtellogenic and vitellogenic oocytes (both the initial and final stage of the trophoplasmatic growth) were found in female gonads. The cross-sections of E. percnurus testes revealed the dominance of germ cells characteristic of the final cytological stages of spermatogenesis in the central part of seminal ampullae, i.e. spermatids and spermatozoids
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