Reproductive parameters of topmouth gudgeon (Pseudorasbora parva) from massively disturbed Cicov ponds habitat

Topmouth gudgeon, which is native to Southeast Asia, is currently categorized as a highly invasive species of fishes. It is able to adapt to conditions in new environments relatively fast, which is probably facilitated by flexible reproductive strategy. In this thesis, reproductive parameters of a population from a heavily disturbed habitat are analysed. Sex ratio, gonadosomatic index, absolute and relative fecundity, as well as the diameter of oocytes were assessed. The sample was collected in post-spawning season (October 2012) and it consisted of 50 specimens. The results are considered to reflect the conditions that prevail in the Cicov ponds, i.e. the heavily disturbed habitat. (authors)