Seasonal and regional variations in the feeding habits of the harbour seal, Phoca vitulina, in the Skagerrak and the Kattegat

摘要: Studies of the feeding harbour seals have been carried out at Tjarno Marine Biological Laboratory since 1977. The studies are based on fish otoliths found in faeces seal haulouts. present paper compares habitats two different localities. Three families fish, gadoids, pleuronectids and clupeoids were predominant seals' diet a rocky shore habitat. Pleuronectids made up 75% sandy Temporal variations habits also examined. results indicate that opportunists their choice prey species, but some locally abundant species do not appear diet.