School Composition of the Antarctic Krill Euphausia Superba in the Waters West of the Antarctic Peninsula in the Austral Summer of 1982

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Abstract
During the austral summer of 1982, we determined the composition of schools of Antarctic krill, Euphausia superba, from the waters west of the Antarctic Peninsula. School composition was variable. We found that schools of different size and maturity composition were geographically separated. Gravid females were found to the northwest of the South Shetland Islands arc and south of Elephant Island. Schools from inside Bransfield Strait and between Palmer Archipelago and the Antarctic Peninsula were primarily juveniles. Schools of mixed composition were found between these two areas, where a southwesterly current coming from a region of gravid females and a northeasterly current coming from a region of juveniles meet. The distribution pattern found during the summer of 1982 has been seen in part by earlier investigators, leading us to believe that the pattern is more than a transitory phenomenon. The location of areas of potential recruitment is particularly important for future management schemes for the developing krill fishery.

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