Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences
RESEARCH ARTICLE

Observations on moulting in Antarctic Krill (Euphausia superba Dana)

T Ikeda and P Dixon

Australian Journal of Marine and Freshwater Research 33(1) 71 - 76
Published: 1982

Abstract

Live E. superba were transported from Antarctic waters to a tropical laboratory where observations at the temperature of -0.5ºC (0 to - 1.0ºC), were made of intermoult period of specimens fed a mixture of microalgae (Dunaliella tertiolecta and Phaeodactylum tricornutum) or artificial pet fish food or starved. Mean intermoult period was 26.4-27.1 days for fed specimens and 29.6 days for starved specimens, with no relation to the size of specimens. The moult accounted for a loss of 2.63-4.35% of animal dry weight, which is equivalent to 1.1-1.8% of animal nitrogen or 1.4-2.3% of animal carbon. The contribution of moults to detritus in the Antarctic Ocean was estimated as 0.11 g C m-2 per year.

https://doi.org/10.1071/MF9820071

© CSIRO 1982


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