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Spawning frequency and fecundity of the Antarctic krill Euphausia superba

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The spawning frequency of Euphausia superba was estimated from observations of egg production by live individual females in captivity on board ship. The females were collected during the austral summer of 1982 near the South Shetland Islands and Elephant Island, Antarctica. On the average, 15.6% of the females spawned each day, which indicates an interval between spawnings of 6.7 d. This evidence contradicts earlier descriptions of the spawning behavior of E. superba. The females appear to be continually producing eggs and releasing them periodically over the entire spawning season, and thus have much higher fecundities than previously estimated.

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Communicated by N. D. Holland, La Jolla

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Ross, R.M., Quetin, L.B. Spawning frequency and fecundity of the Antarctic krill Euphausia superba . Mar. Biol. 77, 201–205 (1983).

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