Influence of Sea Temperature upon the Numbers of Grilse and Multi-Sea-Winter Atlantic Salmon ( Salmo salar ) Caught in the Vicinity of the River Dee (Aberdeenshire)
The possible influence of sea temperature upon the age of return of Atlantic salmon (Salmo salar) was examined using the catch and weight data of grilse and multi-sea-winter (MSW) salmon of the Aberdeen Harbour Board caught either within or adjacent to the River Dee (Aberdeenshire). This data set, a...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1985
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Online Access: | http://dx.doi.org/10.1139/f85-189 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-189 |
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crcansciencepubl:10.1139/f85-189 2023-12-17T10:26:17+01:00 Influence of Sea Temperature upon the Numbers of Grilse and Multi-Sea-Winter Atlantic Salmon ( Salmo salar ) Caught in the Vicinity of the River Dee (Aberdeenshire) Martin, J. H. A. Mitchell, K. A. 1985 http://dx.doi.org/10.1139/f85-189 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-189 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 42, issue 9, page 1513-1521 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1985 crcansciencepubl https://doi.org/10.1139/f85-189 2023-11-19T13:38:19Z The possible influence of sea temperature upon the age of return of Atlantic salmon (Salmo salar) was examined using the catch and weight data of grilse and multi-sea-winter (MSW) salmon of the Aberdeen Harbour Board caught either within or adjacent to the River Dee (Aberdeenshire). This data set, apart from a 10-yr period of commercial confidentiality, is very suitable because uniformity of effort allowed catch per unit effort to be calculated. Only in the last few years was external pressure (high seas fishing) applied to the system. Various temperature series were examined but the known loci of high seas fishing and the temperature ranges involved suggested that the most relevant series is from the subarctic. Increase in temperature is shown to be associated with larger numbers of fish returning as MSW salmon and fewer as grilse. The average weight of grilse increases with grilse catch numbers. Regression equations for grilse and MSW salmon catch numbers are produced for the period 1877–1972. There is a marked 4-yr periodicity in the grilse catch data. A hypothesis is proposed that the temperature of the subarctic influences the migratory pattern, that fish travel further north into the Arctic/subarctic only during those years when the minimum temperature remains above 2 °C. Article in Journal/Newspaper Arctic Atlantic salmon Salmo salar Subarctic Canadian Science Publishing (via Crossref) Arctic Dee ENVELOPE(-59.767,-59.767,-62.433,-62.433) Canadian Journal of Fisheries and Aquatic Sciences 42 9 1513 1521 |
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 Martin, J. H. A. Mitchell, K. A. Influence of Sea Temperature upon the Numbers of Grilse and Multi-Sea-Winter Atlantic Salmon ( Salmo salar ) Caught in the Vicinity of the River Dee (Aberdeenshire) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
The possible influence of sea temperature upon the age of return of Atlantic salmon (Salmo salar) was examined using the catch and weight data of grilse and multi-sea-winter (MSW) salmon of the Aberdeen Harbour Board caught either within or adjacent to the River Dee (Aberdeenshire). This data set, apart from a 10-yr period of commercial confidentiality, is very suitable because uniformity of effort allowed catch per unit effort to be calculated. Only in the last few years was external pressure (high seas fishing) applied to the system. Various temperature series were examined but the known loci of high seas fishing and the temperature ranges involved suggested that the most relevant series is from the subarctic. Increase in temperature is shown to be associated with larger numbers of fish returning as MSW salmon and fewer as grilse. The average weight of grilse increases with grilse catch numbers. Regression equations for grilse and MSW salmon catch numbers are produced for the period 1877–1972. There is a marked 4-yr periodicity in the grilse catch data. A hypothesis is proposed that the temperature of the subarctic influences the migratory pattern, that fish travel further north into the Arctic/subarctic only during those years when the minimum temperature remains above 2 °C. |
format |
Article in Journal/Newspaper |
author |
Martin, J. H. A. Mitchell, K. A. |
author_facet |
Martin, J. H. A. Mitchell, K. A. |
author_sort |
Martin, J. H. A. |
title |
Influence of Sea Temperature upon the Numbers of Grilse and Multi-Sea-Winter Atlantic Salmon ( Salmo salar ) Caught in the Vicinity of the River Dee (Aberdeenshire) |
title_short |
Influence of Sea Temperature upon the Numbers of Grilse and Multi-Sea-Winter Atlantic Salmon ( Salmo salar ) Caught in the Vicinity of the River Dee (Aberdeenshire) |
title_full |
Influence of Sea Temperature upon the Numbers of Grilse and Multi-Sea-Winter Atlantic Salmon ( Salmo salar ) Caught in the Vicinity of the River Dee (Aberdeenshire) |
title_fullStr |
Influence of Sea Temperature upon the Numbers of Grilse and Multi-Sea-Winter Atlantic Salmon ( Salmo salar ) Caught in the Vicinity of the River Dee (Aberdeenshire) |
title_full_unstemmed |
Influence of Sea Temperature upon the Numbers of Grilse and Multi-Sea-Winter Atlantic Salmon ( Salmo salar ) Caught in the Vicinity of the River Dee (Aberdeenshire) |
title_sort |
influence of sea temperature upon the numbers of grilse and multi-sea-winter atlantic salmon ( salmo salar ) caught in the vicinity of the river dee (aberdeenshire) |
publisher |
Canadian Science Publishing |
publishDate |
1985 |
url |
http://dx.doi.org/10.1139/f85-189 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-189 |
long_lat |
ENVELOPE(-59.767,-59.767,-62.433,-62.433) |
geographic |
Arctic Dee |
geographic_facet |
Arctic Dee |
genre |
Arctic Atlantic salmon Salmo salar Subarctic |
genre_facet |
Arctic Atlantic salmon Salmo salar Subarctic |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 42, issue 9, page 1513-1521 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f85-189 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
42 |
container_issue |
9 |
container_start_page |
1513 |
op_container_end_page |
1521 |
_version_ |
1785578009169756160 |