Analysis of dietary overlap in Antarctic fish (Notothenioidei) from the South Shetland Islands: no evidence of food competition

BARRERA ORO, ESTEBAN RODRIGO

Hobart, Australia

Otro; Working Group on Fish Stock Assessment (WG-FSA); 2003

Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR)

A dietary overlap analysis between notothenioid species was carried out among three fish assemblages in the South Shetland Island area. Using Tyler?s (1972) method, the re-occurrence of main and secondary prey among fish predators was 33% in summer and 37% over the year at Potter Cove, 25% in summer and 7% in winter at Admiralty Bay, and 20% in autumn/winter around Elephant Island. Likewise, using the ??S?? index of Linton et al. (1981), the diet similarity between most species pairs is