Distribution and stock of krill, Euphausia superba Dana, in December 1983 and January 1984 before and during the second international biomass experiment I (Sibex 1)
The preliminary results of hydroacoustic investigations conducted aboard the Polish vessel "Professor Siedlecki" (8.XII.1983 - 8.I.1984) are presented. In the first leg of the cruise (8-20.XII.1983) the area between Joinville Is., South Orkney Is., Elephant Is. was covered. The second leg covered the area of the Drake Passage and Bransfield Strait as a part of participation in SIBEX. It was found that total krill stock was much lower than during FIBEX (1981), especially in the Bransfield Strait. Large concentrations of krill were observed only to the north and south-west and south of Elephant Is. and to the north of King George Is.