Passing a seawater challenge test is not indicative of hatchery‐reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics
Despite satisfactory reactions to seawater challenge tests indicative of appropriate physiological state, hatchery‐reared Atlantic salmon Salmo salar smolts stocked in the Eira River in Norway between 2001 and 2011 performed less well at sea in terms of growth, age at maturity and survival than smol...
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Online Access: | http://dx.doi.org/10.1111/jfb.12984 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12984 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12984 |
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crwiley:10.1111/jfb.12984 2024-09-15T17:56:12+00:00 Passing a seawater challenge test is not indicative of hatchery‐reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics Jensen, A. J. Berg, M. Bremset, G. Finstad, B. Hvidsten, N. A. Jensås, J. G. Johnsen, B. O. Lund, E. Statkraft Energi AS Norwegian Institute for Nature Research 2016 http://dx.doi.org/10.1111/jfb.12984 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12984 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12984 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 88, issue 6, page 2219-2235 ISSN 0022-1112 1095-8649 journal-article 2016 crwiley https://doi.org/10.1111/jfb.12984 2024-08-01T04:23:48Z Despite satisfactory reactions to seawater challenge tests indicative of appropriate physiological state, hatchery‐reared Atlantic salmon Salmo salar smolts stocked in the Eira River in Norway between 2001 and 2011 performed less well at sea in terms of growth, age at maturity and survival than smolts of natural origin. The mean rates of return to the river for hatchery‐reared and naturally produced S. salar were 0·98 and 2·35%. In the Eira River, c. 50 000 hatchery‐reared S. salar smolts of local origin were stocked annually to compensate for reduced natural smolt production following regulation for hydroelectric purposes, while a mean of 17 262 smolts were produced naturally in the river. This study demonstrates that, although captive S. salar perform well in seawater challenge tests, hatchery‐reared smolts are not necessarily as adaptable to marine life as their naturally produced counterparts. These findings suggest that production of hatchery‐reared smolts more similar to naturally produced individuals in morphology, physiology and behaviour will be necessary to improve success of hatchery releases. Where possible, supplementary or alternative measures, including habitat restoration, could be implemented to ensure the long‐term viability of wild stocks. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Biology 88 6 2219 2235 |
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Wiley Online Library |
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English |
description |
Despite satisfactory reactions to seawater challenge tests indicative of appropriate physiological state, hatchery‐reared Atlantic salmon Salmo salar smolts stocked in the Eira River in Norway between 2001 and 2011 performed less well at sea in terms of growth, age at maturity and survival than smolts of natural origin. The mean rates of return to the river for hatchery‐reared and naturally produced S. salar were 0·98 and 2·35%. In the Eira River, c. 50 000 hatchery‐reared S. salar smolts of local origin were stocked annually to compensate for reduced natural smolt production following regulation for hydroelectric purposes, while a mean of 17 262 smolts were produced naturally in the river. This study demonstrates that, although captive S. salar perform well in seawater challenge tests, hatchery‐reared smolts are not necessarily as adaptable to marine life as their naturally produced counterparts. These findings suggest that production of hatchery‐reared smolts more similar to naturally produced individuals in morphology, physiology and behaviour will be necessary to improve success of hatchery releases. Where possible, supplementary or alternative measures, including habitat restoration, could be implemented to ensure the long‐term viability of wild stocks. |
author2 |
Statkraft Energi AS Norwegian Institute for Nature Research |
format |
Article in Journal/Newspaper |
author |
Jensen, A. J. Berg, M. Bremset, G. Finstad, B. Hvidsten, N. A. Jensås, J. G. Johnsen, B. O. Lund, E. |
spellingShingle |
Jensen, A. J. Berg, M. Bremset, G. Finstad, B. Hvidsten, N. A. Jensås, J. G. Johnsen, B. O. Lund, E. Passing a seawater challenge test is not indicative of hatchery‐reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics |
author_facet |
Jensen, A. J. Berg, M. Bremset, G. Finstad, B. Hvidsten, N. A. Jensås, J. G. Johnsen, B. O. Lund, E. |
author_sort |
Jensen, A. J. |
title |
Passing a seawater challenge test is not indicative of hatchery‐reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics |
title_short |
Passing a seawater challenge test is not indicative of hatchery‐reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics |
title_full |
Passing a seawater challenge test is not indicative of hatchery‐reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics |
title_fullStr |
Passing a seawater challenge test is not indicative of hatchery‐reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics |
title_full_unstemmed |
Passing a seawater challenge test is not indicative of hatchery‐reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics |
title_sort |
passing a seawater challenge test is not indicative of hatchery‐reared atlantic salmon salmo salar smolts performing as well at sea as their naturally produced conspecifics |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/jfb.12984 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12984 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12984 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 88, issue 6, page 2219-2235 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jfb.12984 |
container_title |
Journal of Fish Biology |
container_volume |
88 |
container_issue |
6 |
container_start_page |
2219 |
op_container_end_page |
2235 |
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1810432409742606336 |