Abstract
The feeding ecology and the food intake of 4 species of channichthyid fishes (Champsocephalus gunnari, Chaenocephalus aceratus, Pseudochaenichthys georgianus, Chionodraco rastrospinosus) and 3 species of nototheniids (Notothenia rossii marmorata, N. gibberifrons, N. larseni) were studied in western Antarctic waters and off South Georgia. Based on the biomasses of these species, assessed by means of a ‘swept area’ method, estimates of their consumption of Krill, Euphausia superba, were made. Krill consumption by C. gunnari, for example, was about 800,000 t yr−1 off South Georgia, and 2400,000 t yr−1 in western Antarctic waters. The decrease in stocks of C. gunnari, due to heavy fishing, has reduced overall consumption of Krill to < 1 times 106 t yr−1.
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