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NOTES ON THE FOOD AND PARASITES OF GREY SEALS, HALICHOERUS GRYPUS (FABRICIUS), FROM THE ISLE OF MAN.
Author(s) -
DUNCAN A.
Publication year - 1956
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1096-3642.1956.tb00455.x
Subject(s) - zoology , fishery , biology , geography , ecology
SUMMARY1 The bodies of two yearling Grey Seals from a colony living in the south of the Isle of Man were dissected, their gut contents examined and their parasites identified. 2 The identifiable stomach contents of the bull yearling consisted of many fish otoliths (mainly belonging to Gadus luscus) and the remains of bottomfeeding crustaceans. The identifiable stomach contents of the yearling cow were a few fish otoliths (two of which belonged to Gadus virens) and tufts of mainly algal detritus. 3 The literature on the parasites of Grey Seals has been reviewed. 4 One yearling seal bore seven and the other five species of internal and external parasites. Their distribution in the body has been described. The slightly older cow seal suffered from a considerably heavier infection of gut parasites than the bull yearling. 5 The intestinal trematode Cryptocotyle lingua (Creplin) has apparently not been recorded before for the Grey Seal.