Факторы, обусловливающие зараженность охотоморского минтая копеподой Haemobaphes diceraus

The data on invasion of Alaska pollock by the copepod H.diceraus are presented. The areas with high degree of invasion are revealed: northwest Kamchatka, the region adjacent to Shelikhov Bay and Shelikhov Bay itself. The increasing of invasion with age of the fishes was interrupted with the long size group formed by strong generations of 1988 and 1989. Within 1994-1997 there was a shift of this failure in invasion to larger sizes. On the basis of distinction in invasion of Alaska pollock in certain areas and the data on changes of spawning and population number on the main spawning grounds of the Okhotsk Sea, it was concluded that the age failure in the invasion for the western Kamchatka pollock in 90s was caused by the infected poorly fishes of the strong generations migrated there from the western areas of the sea for the first time spawning.