Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids
Abstract Threatened fish populations worldwide are relying on stock supplementation by hatchery‐reared fish. Although stocking with non‐native fish may lead to hybridization, thereby disrupting local adaptations, it could also improve the adaptive potential of small populations by increasing variabi...
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crwiley:10.1111/csp2.12893 2024-06-02T08:03:41+00:00 Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids Eronen, Aslak Hyvärinen, Pekka Janhunen, Matti Kekäläinen, Jukka Kortet, Raine Academy of Finland European Maritime and Fisheries Fund 2023 http://dx.doi.org/10.1111/csp2.12893 https://onlinelibrary.wiley.com/doi/pdf/10.1111/csp2.12893 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/csp2.12893 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Conservation Science and Practice volume 5, issue 3 ISSN 2578-4854 2578-4854 journal-article 2023 crwiley https://doi.org/10.1111/csp2.12893 2024-05-03T11:58:51Z Abstract Threatened fish populations worldwide are relying on stock supplementation by hatchery‐reared fish. Although stocking with non‐native fish may lead to hybridization, thereby disrupting local adaptations, it could also improve the adaptive potential of small populations by increasing variability in essential behavioral traits. In this study, we crossbred the critically endangered Finnish landlocked salmon with a geographically close Baltic anadromous salmon population to compare boldness‐related behavioral traits among the crossing groups. We studied postrelease exploration in seminatural streams and tested stress tolerance of the fish, as reflected by their response during swimming trials and commencement of feeding after the trials. In the stress tolerance experiments, we compared fish with different rearing backgrounds to gain insight into environmentally induced variability in stress tolerance. When compared with the anadromous salmon, the landlocked salmon showed more active postrelease exploration and higher stress tolerance. The hybrids displayed intermediate behaviors compared with the purebred salmon, indicating heritability of these traits. The landlocked salmon showed less variable exploration than the hybrids with anadromous salmon as the maternal strain, but we did not find rearing‐dependent responses in stress tolerance. In summary, our findings suggest that hybridization could help in reversing likely domestication‐related negative behavioral traits in the landlocked salmon. Article in Journal/Newspaper Atlantic salmon Wiley Online Library Conservation Science and Practice 5 3 |
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Wiley Online Library |
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English |
description |
Abstract Threatened fish populations worldwide are relying on stock supplementation by hatchery‐reared fish. Although stocking with non‐native fish may lead to hybridization, thereby disrupting local adaptations, it could also improve the adaptive potential of small populations by increasing variability in essential behavioral traits. In this study, we crossbred the critically endangered Finnish landlocked salmon with a geographically close Baltic anadromous salmon population to compare boldness‐related behavioral traits among the crossing groups. We studied postrelease exploration in seminatural streams and tested stress tolerance of the fish, as reflected by their response during swimming trials and commencement of feeding after the trials. In the stress tolerance experiments, we compared fish with different rearing backgrounds to gain insight into environmentally induced variability in stress tolerance. When compared with the anadromous salmon, the landlocked salmon showed more active postrelease exploration and higher stress tolerance. The hybrids displayed intermediate behaviors compared with the purebred salmon, indicating heritability of these traits. The landlocked salmon showed less variable exploration than the hybrids with anadromous salmon as the maternal strain, but we did not find rearing‐dependent responses in stress tolerance. In summary, our findings suggest that hybridization could help in reversing likely domestication‐related negative behavioral traits in the landlocked salmon. |
author2 |
Academy of Finland European Maritime and Fisheries Fund |
format |
Article in Journal/Newspaper |
author |
Eronen, Aslak Hyvärinen, Pekka Janhunen, Matti Kekäläinen, Jukka Kortet, Raine |
spellingShingle |
Eronen, Aslak Hyvärinen, Pekka Janhunen, Matti Kekäläinen, Jukka Kortet, Raine Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids |
author_facet |
Eronen, Aslak Hyvärinen, Pekka Janhunen, Matti Kekäläinen, Jukka Kortet, Raine |
author_sort |
Eronen, Aslak |
title |
Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids |
title_short |
Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids |
title_full |
Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids |
title_fullStr |
Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids |
title_full_unstemmed |
Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids |
title_sort |
postrelease exploration and stress tolerance of landlocked and anadromous atlantic salmon and their hybrids |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/csp2.12893 https://onlinelibrary.wiley.com/doi/pdf/10.1111/csp2.12893 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/csp2.12893 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Conservation Science and Practice volume 5, issue 3 ISSN 2578-4854 2578-4854 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/csp2.12893 |
container_title |
Conservation Science and Practice |
container_volume |
5 |
container_issue |
3 |
_version_ |
1800748276656373760 |