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The summer diet of demersal fish at the South Shetland Islands

Published online by Cambridge University Press:  10 May 2004

Masanori Takahashi
Affiliation:
Japan Marine Fishery Resources Research Center, 3-27 Kioi-cho, Chiyoda-ku, Tokyo 102, Japan
Tetsuo Iwami
Affiliation:
Laboratory of Biology, Tokyo Kasei Gakuin University, 2600 Aihara, Machida, Tokyo 194-02, Japan

Abstract

The stomach contents of demersal fish in late January 1982 were analysed. Samples were taken at 100, 300 and 500 m depth south of Elephant Island, Bransfield Strait and north of Livingston Island, and at 800 m to the east of Smith Island. Fifty four taxa of fish belonging to 11 families were collected. The diets of 2101 fish representing 38 taxa were examined. These were classified into three categories, fish feeders, krill feeders and benthos feeders. Fish prey species fed on krill and/or benthos. Krill was a major dietary component for 32 (84.2%) out of 38 taxa. Gobionotothen gibberifrons was distributed at all 10 stations (100–800 m in depth) and its diet comprised krill and benthos. The present findings verify the importance of krill in the Antarctic marine ecosystem and indicate that krill is consumed by benthic fish at greater depths than previously reported.

Type
Papers—Life Sciences and Oceanography
Copyright
© Antarctic Science Ltd 1997

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