Abstract
We measured the nutritional composition and energetic values of 19 prey species of Great Cormorants Phalacrocorax carbo in Chubu, central Japan. Samples were collected during 2005–2012 from several breeding colonies, fish markets, rivers, and the sea near colonies. Lipid content and energetic value (dry mass based) varied widely, from 0.6% and 12.43 kJ/g for red swamp crayfish Procambarus clarkii to 38.2% and 27.79 kJ/g for white-spotted conger Conger myriaster.