The qualitative-quantitative content of juvenile stoneflies (plecoptera) in macrozoobenthos

A study was carried out on the changes in content and abundance of local juvenile stonefly communities species at the sites Garež, Delijas and Balbasici during autumn of 2009 and spring and summer of 2010. A total of 1585 specimens were collected using a mash for zoobentos, out of which 541 were collected at the site Garež, 486 at the site Delijas and 558 at the site Balbasici. The specimens were categorized into five families and 20 species. The most abundant species out of the total number at the site Garež was Leuctra nigra (73,94%), at the site Delijas Perla marginata (19,96%), and at the site Balbasici Leuctra nigra (25,63%). The highest diversity indeces were at the site Delijas, and the highest eveness was at site Balbasici. Key words: Crna Rijeka River, communities of juvenile stoneflies, Plecoptera