Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char ( Salvelinus alpinus ) in Northern Norway
Anadromy of nine lake populations of Arctic char (Salvelinus alpinus) in northern Norway was scored on the following criteria: prevalence of marine parasites, fish size, and size at maturity. In general, anadromy dominated in shallow lakes and residency dominated in deep lakes. The anadromy scores o...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1994
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crcansciencepubl:10.1139/f94-123 2023-12-17T10:25:30+01:00 Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char ( Salvelinus alpinus ) in Northern Norway Kristoffersen, Knut Halvorsen, Morten Jørgensen, Lisbeth 1994 http://dx.doi.org/10.1139/f94-123 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-123 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 51, issue 6, page 1229-1246 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1994 crcansciencepubl https://doi.org/10.1139/f94-123 2023-11-19T13:38:41Z Anadromy of nine lake populations of Arctic char (Salvelinus alpinus) in northern Norway was scored on the following criteria: prevalence of marine parasites, fish size, and size at maturity. In general, anadromy dominated in shallow lakes and residency dominated in deep lakes. The anadromy scores of the populations were significantly higher in lakes without a profundal zone compared with lakes with a profundal zone. There was also a significant negative correlation between the relative volume of the profundal zone (RPV) and the degree of anadromy and between RPV and mean parr length at ages 2+ and 3+. However, differences in parr growth could not explain all the observed variation in anadromy, and the correlation between mean parr length at ages 2+ and 3+ and the degree of anadromy in the different populations was not significant. In addition to the effect on parr growth, lake morphology seemed to influence the degree of anadromy through the relative size of different habitats, which in turn affects the number of available niches. The parr weight/length relationship and infection with the freshwater parasites Phyllodistomum umblae and Diphyllobothrium spp. did not affect the degree of anadromy. Article in Journal/Newspaper Arctic Northern Norway Salvelinus alpinus Canadian Science Publishing (via Crossref) Arctic Norway Nine Lake ENVELOPE(-128.903,-128.903,55.875,55.875) Canadian Journal of Fisheries and Aquatic Sciences 51 6 1229 1246 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Kristoffersen, Knut Halvorsen, Morten Jørgensen, Lisbeth Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char ( Salvelinus alpinus ) in Northern Norway |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Anadromy of nine lake populations of Arctic char (Salvelinus alpinus) in northern Norway was scored on the following criteria: prevalence of marine parasites, fish size, and size at maturity. In general, anadromy dominated in shallow lakes and residency dominated in deep lakes. The anadromy scores of the populations were significantly higher in lakes without a profundal zone compared with lakes with a profundal zone. There was also a significant negative correlation between the relative volume of the profundal zone (RPV) and the degree of anadromy and between RPV and mean parr length at ages 2+ and 3+. However, differences in parr growth could not explain all the observed variation in anadromy, and the correlation between mean parr length at ages 2+ and 3+ and the degree of anadromy in the different populations was not significant. In addition to the effect on parr growth, lake morphology seemed to influence the degree of anadromy through the relative size of different habitats, which in turn affects the number of available niches. The parr weight/length relationship and infection with the freshwater parasites Phyllodistomum umblae and Diphyllobothrium spp. did not affect the degree of anadromy. |
format |
Article in Journal/Newspaper |
author |
Kristoffersen, Knut Halvorsen, Morten Jørgensen, Lisbeth |
author_facet |
Kristoffersen, Knut Halvorsen, Morten Jørgensen, Lisbeth |
author_sort |
Kristoffersen, Knut |
title |
Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char ( Salvelinus alpinus ) in Northern Norway |
title_short |
Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char ( Salvelinus alpinus ) in Northern Norway |
title_full |
Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char ( Salvelinus alpinus ) in Northern Norway |
title_fullStr |
Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char ( Salvelinus alpinus ) in Northern Norway |
title_full_unstemmed |
Influence of Parr Growth, Lake Morphology, and Freshwater Parasites on the Degree of Anadromy in Different Populations of Arctic Char ( Salvelinus alpinus ) in Northern Norway |
title_sort |
influence of parr growth, lake morphology, and freshwater parasites on the degree of anadromy in different populations of arctic char ( salvelinus alpinus ) in northern norway |
publisher |
Canadian Science Publishing |
publishDate |
1994 |
url |
http://dx.doi.org/10.1139/f94-123 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-123 |
long_lat |
ENVELOPE(-128.903,-128.903,55.875,55.875) |
geographic |
Arctic Norway Nine Lake |
geographic_facet |
Arctic Norway Nine Lake |
genre |
Arctic Northern Norway Salvelinus alpinus |
genre_facet |
Arctic Northern Norway Salvelinus alpinus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 51, issue 6, page 1229-1246 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f94-123 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
51 |
container_issue |
6 |
container_start_page |
1229 |
op_container_end_page |
1246 |
_version_ |
1785577125094359040 |