Change in the degree of infestation of parasitic nematodes in Grey Seals Halichoerus grypus from Froan, Norway
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 wherea...
| Published in: | Fauna Norvegica |
|---|---|
| Main Author: | |
| Format: | Article |
| Language: | English |
| Published: |
Norwegian University of Science and Technology
1988-12-01
|
| Subjects: | |
| Online Access: | https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/6083 |
| Summary: | 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.
|
|---|---|
| ISSN: | 1502-4873 1891-5396 |