engleski

Cobitis complex as a part of the fish community in the Cetina and Neretva Rivers in Croatia

Croatian Adriatic river system consists of six rivers with their tributaries: Mirna, Rasa, Zrmanja, Krka, Cetina and Neretva. The presence of genus Cobitis has been recorded in only three of them: Zrmanja, Cetina and Neretva. There are some specimens of genus Cobitis from the river Zrmanja. This area was never studied systematically and therefore there are not enough records to analyse Zrmanja's fish fauna. In the river Cetina genus Cobitis is a rare genus. It lives in a community of five species and represents just a 2.9 percent in total number of fish individuals and 0.14 percent in total biomass (20 years old data). In river Neretva genus Cobitis is a common genus with just a 3.6 percent in total number of fish specimens and 0.38 percent in total biomass. If we compare percentage number of fish individuals for genus Cobitis in Neretva and Cetina, at first sight we would not see a great difference, but the fish community in river Neretva consists of 33 different fish species and genus Cobitis is a very important genus there. In this paper we compare present records of the fish community in the River Cetina with the old one. We also compare fish communities of Neretva and Cetina and analyse status of genus Cobitis in each of them.

Croatian Adriatic river system; Cetina; Neretva; genus Cobitis

nije evidentirano