Aves, p�le ornithologique de Natagora

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Aves, 38/2 | 2001 | 49-59

  On the diet of the Great Cormorant (Phalacrocorax carbo) in freshwater habitats of the Pas-de-Calais (France).
Libois, R.

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Article summary

The stomach contents of 40 Great Cormorants shot during regulation operations in the Pas-de-Calais have been analysed. Eight stomachs were empty and 426 fishes belonging to 15 species were recovered in the others. The dominant prey is the Roach. Other regular prey are the Common Bream and the Perch. Other fishes (Salmonids, Pike, Pikeperch, Ruffe, Rudd, Lampern) appear in less than 5 stomachs. Most of the preys are small sized fishes, less than 12 cm (total length). The biomass of 80 % of the preys is less than 20 g. However, the role of the greater fishes in the diet must be emphasized : those weighing more than 200 g (1 % in numbers) represent 20 % of the ingested biomass.

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