The study of ichthyofauna from complex lakes Gorgova-Uzlina was undertaken in October 2004, using two complementary methods of sampling: electric fishing for shoreline and gillnet fishing for open water.The biodiversity index and equitability indicies were calculated per lake and methods.The complex waters shelter a richness fish of 27 species, with 4 here exotic and 23 native species.
The most abundant fish species are Rutilus rutilus (roach), Alburnus alburnus (bleak), Rhodeus amarus (bitterling), Leucaspius delineatus and coq-clear 100 ubiquinol Perca fluviatilis (perch) with slight differences for those two complementary methods of sampling.The complex lake has a very stable ecosystem, with shoreline (2,37 Shanon-Wiener index and 0,745 equitability indices) more stables than open water (1.627 Shanon-Wiener index and 0,534 equitability indices).