USING THE BOTTOM TRAWL SURVEYS FOR ESTIMATION OF FLATFHISH NUMBERING THE KARAGINSKI AND OLUTORSKI GULFS: METHODICAL APPROACH AND THE RESULTS
BOTTOM TRAWL SURVEYS, ESTIMATIONS OF STOCKS, NUMBER, BIOMASS On the basis of the data from bottom trawl surveys executed in Karaginski and Olutorski Gulfs per 1951-2008 the methodical approach of updating of estimations of stocks depending on a research season is offered. The received results are used for estimation of number and a biomass of flatfishes from Karaginski and Olutorski Gulfs and for finding-out of features of their long-term dynamics. It is found, that in long-term aspect, the greatest contribution to a stock provided: Yelooowfin sole - 35% from the general biomass, Starry flounder - 24%, and also Flathead sole and Alaska plaice - on 12%, accordingly. The assumption that consecutive change of the periods of high number of different kinds of flatfish is reflection of their adaptation to coexistence within the limits of groundfishes community is made.