Многолетние тренды изменчивости числа видов рыб в российских водах Кунаширского пролива по уловам донных сетей

The results of studying species composition of fish from bottom gillnet catches in the eastern part of the Kunashir Strait showed that in the falls of 1998-2014 a long-term trend of the species number increasing was formed. In Januaries, the trend for this indicator to decrease was marked. In the perennial dynamics of zoogeographical or ecological group number, the two analogous seasonally opposite tendencies were traced. Long-term trends of the netting depth variety were found to have a contrast direction in each season. The exposed trend changes in catching depths are assumingly connected with vertical redistribution of pollock and arabesque greenling schools during the prespawning period. Distribution changes of these two fish species might have resulted from abundance fluctuations of their stocks and the oceanological regime shift in the Kunashir Strait.