THE STRUCTURE OF THE COMMERCIAL AGGREGATIONS OF SCHOOLMASTER GONATE SQUID BERRYTEUTHIS MAGISTER (BERRY, 1913) IN THE AREA OF THE NORTHERN KURIL ISLANDS AND SOUTHEAST KAMCHATKA IN SUMMER AND AUTUMN OF 2015
Examination of biological condition of schoolmaster gonate squid on the continental shelf and slope off the Northern Kuril Islands and Southeast Kamchatka was carried out in 2015 for the period from August 13 to October 8. Biological condition of 17 595 squids was checked, and composition of catch in 91 trawlings was estimated. Analysis of results has revealed some strustural shifts in composition of monitored commercial aggregations. In particular, the number of males in September catches was higher due to intense arrival of mature or maturing males from the outside of the area considered.