Karyotype, morphology, and reproduction ability of the Prussian carp, Carassius gibelio (Actinopterygii: Cypriniformes: Cyprinidae) from unisexual and bisexual populations in Poland
2011
Boron, A. | Szlachciak, J. | Juchno, D. | Grabowska, A. | Jagusztyn, B. | Porycka, K.,University of Warmia and Mazury, Olsztyn (Poland). Div. of Zoology
The majority of the European populations of the Prussian carp, Carassius gibelio, consist predominantly of females reproducing by gynogenesis but include a small portion of males. The ploidy level by karyotype, some taxonomic characteristics by analysis of morphology, and the reproductive potential by histology of gonads of Prussian carp individuals were studied. In total 31 specimens from three different populations inhabiting the Vistula River basin in Poland have been analyzed. All individuals of two populations were triploid females with high chromosomal variability from 150 to 160 chromosomes (and micro-chromosomes). Among individuals of the third population, males and females of 2n = 100 and one triploid male 3n = 160 (151_162) chromosomes were detected. Gonad histology of the ovaries indicated the females were mature at the age of 3. Testes morphology of diploids and one triploid male indicated their reproductive abilities
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