Change in the degree of infestation of parasitic nematodes in Grey Seals Halichoerus grypus from Froan, Norway

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Published: Dec 31, 1988
DOI: https://doi.org/10.5324/fn.v9i0.6083
Keywords:
Mammalia, Carnivora, Nematoda, Rhabditida, interspecific dynamic, Central Norway

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Øystein Wiig
Institute of Marine Research, PO. Box 1870 Nordnes, NO-5024 Bergen, Norway

Abstract

Change in nematode infestation in stomachs of Grey Seals caught at the breeding ground at Froan on the coast of Sør-Trøndelag county, Norway, is recorded. The abundance of nematodes decreased from 1977/78 to 1982/84. In the first period more than 50% of the seals had more that 1000 nematodes whereas in 1982/84 most of the seals had fewer than 500 nematodes in their stomachs. In the same period the breeding stock of seals in the area has increased. The decreased infestation of nematodes in the seals might be an effect of change in food habits from demersal to pelagic fish.

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How to Cite
Wiig, Øystein. (1988). Change in the degree of infestation of parasitic nematodes in Grey Seals Halichoerus grypus from Froan, Norway. Fauna Norvegica, 9, 47-49. https://doi.org/10.5324/fn.v9i0.6083
Issue
Vol. 9 (1988)
Section
Articles
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