Age dynamics of roach infestation with metazoic parasites

The study of roach for the metazoic parasites' presence allowed to detect D. crucifer, chromatophorum. P. homoion homoion, C. laticeps, O. felineus, ovatus, R. campanula, I. platycephalus, S. bramae, elongatum. acus (l.) Unionidae gen. sp E. sieboldi geometra Proteocephalus sp. greatest species diversity was observed in fish groups 2+, 3+, and 4+ (11, 14, 13 parasites, respectively). At ages 1+ 5+, 8 parasitic organisms were found, group 0+ - 6 parasites. noted on gills 5 species, intestines – 3 muscles mesentery 2 lens, fins, kidneys body surface 1 each. Cluster analysis invasion extent parasites aged 8+ showed merging into one cluster; 0+, 5+ 6+-8+ are allocated a separate cluster. calculated clustering by IE age shows similarity parasite fauna magnitude extensiveness at from 4+, 6+ 8+. With age, biotopic distribution nutrition spectrum changes, which affects its infestation composition community as whole.