CPUE, net towing depth and body length of krill during the winter operation of Japanese krill fishery around South Georgia

Monthly CPUEs during winter operation of Japanese krill trawlers around South Georgia were calculated. The range of CPUE values in 1991 season (poor year of krill) was comparable to the range of summer operation around Elephant Island and Livingston Island. Vertical distribution presumed from net towing depth. Net tow depth data implied that overall krill distribution in the the winter season might be deeper than the summer season. Interannual variability of vertical distribution was also suggeted. Length frequency distribution implied the evidence of strong krill influx from the Antarctic Peninsula region and Weddell Sea.