Journal
ICES JOURNAL OF MARINE SCIENCE
Volume 68, Issue 9, Pages 1909-1917Publisher
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsr104
Keywords
cod; condition factor; diet; Faroe Bank; Gadus morhua; stomach contents; stomach fullness index (SFI); temporal variation
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Data from ten bottom surveys on the Faroe Bank during the years 1994-1998 are used to describe the feeding habits of cod on the Faroe Bank. Cod are clearly omnivorous in their diet. Overall, fish were found in 82% of the stomachs, accounting for 59% of the food by weight, but just 35% of the food items by number. Of the fish, lesser sandeel was the most common, making up 78% of the fish biomass consumed. Cannibalism was practically non-existent. In some years, the squid Loligo forbesi formed an important component of the diet, was the main food and identified in up to 64% of the stomachs, and constituting 60% by weight of the diet; in other years, it was a negligible part. Crustaceans were found in 48% of the stomachs, accounting for 16% by weight but as much as 44% by numbers. The diet of cod shifts ontogenetically, with stomach fullness greater and nutrient quality of prey higher for cod <70 cm.
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