Open Sea Releases of Atlantic Salmon Smolts, Salmo salar , In Central Norway, 1973–83
Low returns of adult Atlantic salmon (Salmo salar) from releases of hatchery-reared smolts initiated experiments to increase recapture rates in the River Surna. A hypothesis that heavy postsmolt mortality due to predation could be reduced by guiding the smolts through coastal areas was tested. Three...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
1988
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Online Access: | http://dx.doi.org/10.1139/f88-157 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-157 |
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crcansciencepubl:10.1139/f88-157 2023-12-17T10:27:16+01:00 Open Sea Releases of Atlantic Salmon Smolts, Salmo salar , In Central Norway, 1973–83 Gunnerød, T. B. Hvidsten, N. A. Heggberget, T. G. 1988 http://dx.doi.org/10.1139/f88-157 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-157 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 45, issue 8, page 1340-1345 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1988 crcansciencepubl https://doi.org/10.1139/f88-157 2023-11-19T13:38:28Z Low returns of adult Atlantic salmon (Salmo salar) from releases of hatchery-reared smolts initiated experiments to increase recapture rates in the River Surna. A hypothesis that heavy postsmolt mortality due to predation could be reduced by guiding the smolts through coastal areas was tested. Three sites of release were selected: in the Surna, in the fjord, and on the coast off the Surna. Offshore releases gave 111% higher total recapture rates compared with river releases. The remote migration system did not seem to be disturbed by open sea releases, but the number of strayers to rivers other than the Surna increased significantly with the distance between point of release and the native river. Site of release of smolts was more important than genetic background of the fish for the site of recaptures of adult salmon. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Norway Surna ENVELOPE(8.667,8.667,62.983,62.983) Canadian Journal of Fisheries and Aquatic Sciences 45 8 1340 1345 |
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 Gunnerød, T. B. Hvidsten, N. A. Heggberget, T. G. Open Sea Releases of Atlantic Salmon Smolts, Salmo salar , In Central Norway, 1973–83 |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Low returns of adult Atlantic salmon (Salmo salar) from releases of hatchery-reared smolts initiated experiments to increase recapture rates in the River Surna. A hypothesis that heavy postsmolt mortality due to predation could be reduced by guiding the smolts through coastal areas was tested. Three sites of release were selected: in the Surna, in the fjord, and on the coast off the Surna. Offshore releases gave 111% higher total recapture rates compared with river releases. The remote migration system did not seem to be disturbed by open sea releases, but the number of strayers to rivers other than the Surna increased significantly with the distance between point of release and the native river. Site of release of smolts was more important than genetic background of the fish for the site of recaptures of adult salmon. |
format |
Article in Journal/Newspaper |
author |
Gunnerød, T. B. Hvidsten, N. A. Heggberget, T. G. |
author_facet |
Gunnerød, T. B. Hvidsten, N. A. Heggberget, T. G. |
author_sort |
Gunnerød, T. B. |
title |
Open Sea Releases of Atlantic Salmon Smolts, Salmo salar , In Central Norway, 1973–83 |
title_short |
Open Sea Releases of Atlantic Salmon Smolts, Salmo salar , In Central Norway, 1973–83 |
title_full |
Open Sea Releases of Atlantic Salmon Smolts, Salmo salar , In Central Norway, 1973–83 |
title_fullStr |
Open Sea Releases of Atlantic Salmon Smolts, Salmo salar , In Central Norway, 1973–83 |
title_full_unstemmed |
Open Sea Releases of Atlantic Salmon Smolts, Salmo salar , In Central Norway, 1973–83 |
title_sort |
open sea releases of atlantic salmon smolts, salmo salar , in central norway, 1973–83 |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/f88-157 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-157 |
long_lat |
ENVELOPE(8.667,8.667,62.983,62.983) |
geographic |
Norway Surna |
geographic_facet |
Norway Surna |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 45, issue 8, page 1340-1345 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f88-157 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
45 |
container_issue |
8 |
container_start_page |
1340 |
op_container_end_page |
1345 |
_version_ |
1785579069944889344 |