Macrozoobentos on the shelf of the Kronotsky Gulf

Data about the taxonomic composition and spatial distribution of bottom invertebrates Kronotsky Gulf were obtained on results grab survey carried in September 2002. Analysis samples revealed 72 species Polychaeta, 21 molluscs (Bivalvia), 17 crustaceans (mostly Amphipoda), 2 echinodermata (Echinoidea Ophiuroidea). The average biomass depth range 25–200 m was 242±116 g/m where density 306±51 organisms/m . most high values observed outlet parts rivers Zhupanova, Semyachik, Kronotskaya, contribution sea dollar Echinarachnius parma communities principal. Despite fluctuations particular taxons during 50 years, total keeps stable (206–242 ). Like 1949 E. plays main role communities.