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Feeding selectivity in Notothenia neglecta, Nybelin, from Potter Cove, South Shetland Islands, Antarctica

Published online by Cambridge University Press:  14 May 2004

E.R. Barrera-Oro  and
R.J. Casaux
E.R. Barrera-Oro
Affiliation:
Instituto Antártico Argentino, División Biología, Cerrito 1248, 1010 Buenos Aires, República Argentina
R.J. Casaux
Affiliation:
Instituto Antártico Argentino, División Biología, Cerrito 1248, 1010 Buenos Aires, República Argentina
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Abstract

A study of feeding selectivity in Notothenia neglecta Nybelin 1951, was carried out between October 1988 and January 1989 at Potter Cove, King George Island, where this is the dominant fish species. The abundance and biomass of benthic organisms from 0–40m were compared with their occurrence in the diet of 142 fish. The Ivlev index indicated that the food items positively selected by the fish were sedentary polychaetes, the isopod Glyptonotus antarcticus, the gammarid amphipod Paradexamine sp., the bivalve Dacrydyum sp., the gastropods Margarella antarctica and Eatoniella sp., and algae. The biomass of the benthic community in the sampling area was low, presumably due to the effects of anchor ice. Despite being pelagic, krill (Euphausia superba) was by far the main food of N. neglecta which is considered a benthic feeder.

Keywords

Antarctic fishmarine ecology
Type
Papers—Life Science and Oceanography
Information
Antarctic Science , Volume 2 , Issue 3 , September 1990 , pp. 207 - 213
Copyright
© Antarctic Science Ltd 1990

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