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    Change of sex ratio of krill (Euphausia superba) from austral early summer to midsummer in 1983/84 in the vicinity of Prydz Bay, Antarctica

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    M. Naganobu and S. Kawaguchi (Japan)
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    In this present report the change of the Antarctic krill distribution pattern from December 1983 to January/February 1984 in the vicinity of Prydz Bay was analysed. The results showed the remarkable change of sex ratio and coefficient of fatness between the early summer and the midsummer. The waters indicating the high ratios of female krill with the high coefficient of fatness were considered to be suitable spawning grounds for krill. These waters were characterized by the remarkable Shelf Slope Water originated from the cold Winter Water.