Enriched rearing improves survival of hatchery-reared Atlantic salmon smolts during migration in the River Tornionjoki
Low survival of stocked fish has been associated with fitness declines of the captive reared fishes because of genetic domestication and unnatural rearing environments. The effects of broodstock origin (wild or captive) or rearing method (standard or enriched) on survival and migration of hatchery-r...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
2013
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Online Access: | http://dx.doi.org/10.1139/cjfas-2013-0147 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0147 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0147 |
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crcansciencepubl:10.1139/cjfas-2013-0147 2024-09-15T17:56:08+00:00 Enriched rearing improves survival of hatchery-reared Atlantic salmon smolts during migration in the River Tornionjoki Hyvärinen, Pekka Rodewald, Petra Bradford, Michael 2013 http://dx.doi.org/10.1139/cjfas-2013-0147 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0147 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0147 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 9, page 1386-1395 ISSN 0706-652X 1205-7533 journal-article 2013 crcansciencepubl https://doi.org/10.1139/cjfas-2013-0147 2024-09-05T04:11:16Z Low survival of stocked fish has been associated with fitness declines of the captive reared fishes because of genetic domestication and unnatural rearing environments. The effects of broodstock origin (wild or captive) or rearing method (standard or enriched) on survival and migration of hatchery-reared Atlantic salmon smolts (Salmo salar) were investigated in the Tornionjoki River using radiotelemetry. Smolts that were reared with enriched methods had a twofold increase in survival (∼38%) compared with smolts that had been reared in a standard hatchery environment (∼19%). Nature-caught smolts had highest survival (∼57%). Smolts from enriched rearing had a higher initial migration speed than fish from standard rearing. Initial migration speed during the first 3 km was positively correlated to survival probability after 290 km for hatchery fish. There was no clear effect of origin on survival or migration speed. The results of this study show that enriching the rearing environment with methods easily applicable to large-scale production promotes smolt survival and migration speed during river migration, which is imperative for stocking success. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 70 9 1386 1395 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Low survival of stocked fish has been associated with fitness declines of the captive reared fishes because of genetic domestication and unnatural rearing environments. The effects of broodstock origin (wild or captive) or rearing method (standard or enriched) on survival and migration of hatchery-reared Atlantic salmon smolts (Salmo salar) were investigated in the Tornionjoki River using radiotelemetry. Smolts that were reared with enriched methods had a twofold increase in survival (∼38%) compared with smolts that had been reared in a standard hatchery environment (∼19%). Nature-caught smolts had highest survival (∼57%). Smolts from enriched rearing had a higher initial migration speed than fish from standard rearing. Initial migration speed during the first 3 km was positively correlated to survival probability after 290 km for hatchery fish. There was no clear effect of origin on survival or migration speed. The results of this study show that enriching the rearing environment with methods easily applicable to large-scale production promotes smolt survival and migration speed during river migration, which is imperative for stocking success. |
author2 |
Bradford, Michael |
format |
Article in Journal/Newspaper |
author |
Hyvärinen, Pekka Rodewald, Petra |
spellingShingle |
Hyvärinen, Pekka Rodewald, Petra Enriched rearing improves survival of hatchery-reared Atlantic salmon smolts during migration in the River Tornionjoki |
author_facet |
Hyvärinen, Pekka Rodewald, Petra |
author_sort |
Hyvärinen, Pekka |
title |
Enriched rearing improves survival of hatchery-reared Atlantic salmon smolts during migration in the River Tornionjoki |
title_short |
Enriched rearing improves survival of hatchery-reared Atlantic salmon smolts during migration in the River Tornionjoki |
title_full |
Enriched rearing improves survival of hatchery-reared Atlantic salmon smolts during migration in the River Tornionjoki |
title_fullStr |
Enriched rearing improves survival of hatchery-reared Atlantic salmon smolts during migration in the River Tornionjoki |
title_full_unstemmed |
Enriched rearing improves survival of hatchery-reared Atlantic salmon smolts during migration in the River Tornionjoki |
title_sort |
enriched rearing improves survival of hatchery-reared atlantic salmon smolts during migration in the river tornionjoki |
publisher |
Canadian Science Publishing |
publishDate |
2013 |
url |
http://dx.doi.org/10.1139/cjfas-2013-0147 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0147 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0147 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 9, page 1386-1395 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2013-0147 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
70 |
container_issue |
9 |
container_start_page |
1386 |
op_container_end_page |
1395 |
_version_ |
1810432340758888448 |