Restored river habitat provides a natural spawning area for a critically endangered landlocked Atlantic salmon population
Supplementing endangered fish populations with captive bred individuals is a common practice in conservation management. The aim of supplementary releases from hatchery broodstocks is to maintain the viability of populations by maintaining their genetic diversity. Landlocked Lake Saimaa salmon (Salm...
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ftpubmed:oai:pubmedcentral.nih.gov:7241772 2023-05-15T15:32:53+02:00 Restored river habitat provides a natural spawning area for a critically endangered landlocked Atlantic salmon population Leinonen, Tuomas Piironen, Jorma Koljonen, Marja-Liisa Koskiniemi, Jarmo Kause, Antti 2020-05-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7241772/ http://www.ncbi.nlm.nih.gov/pubmed/32437447 https://doi.org/10.1371/journal.pone.0232723 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7241772/ http://www.ncbi.nlm.nih.gov/pubmed/32437447 http://dx.doi.org/10.1371/journal.pone.0232723 © 2020 Leinonen et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY PLoS One Research Article Text 2020 ftpubmed https://doi.org/10.1371/journal.pone.0232723 2020-06-07T00:35:11Z Supplementing endangered fish populations with captive bred individuals is a common practice in conservation management. The aim of supplementary releases from hatchery broodstocks is to maintain the viability of populations by maintaining their genetic diversity. Landlocked Lake Saimaa salmon (Salmo salar m. sebago) has been critically endangered for the past half-century. As a result of anthropogenic disturbance, especially construction of hydroelectric power plants, the Lake Saimaa salmon has become completely dependent on hatchery broodstock. Recently, habitat restoration has been done in one of the former spawning rivers with the aim of creating a new natural spawning ground for the critically endangered population. Hatchery fish releases have also been revised so that in addition to juveniles, adult fish from the hatchery and from the wild have been released into the restored river. We assessed here if a restored river stretch can be used as a natural spawning ground and juvenile production area with the aim of improving genetic diversity of the critically endangered Lake Saimaa salmon. By constructing a pedigree of the released adults, and juveniles sampled from the restored river, we found that the majority of the released adults had produced offspring in the river. We also found that wild-caught spawners that were released into the restored river had much higher reproductive success than hatchery-reared parents that were released into the restored river at the same time. We found no significant differences in genetic diversity between the parent and offspring generations. Meanwhile, relatedness among different groups of adults and juveniles varied a lot. For example, while the hatchery-reared females were on average half-siblings, wild-caught females showed no significant relatedness. This highlights the importance of using pedigree information in planning the conservation and management of endangered populations, especially when artificial propagation is involved. Text Atlantic salmon Salmo salar PubMed Central (PMC) PLOS ONE 15 5 e0232723 |
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Research Article Leinonen, Tuomas Piironen, Jorma Koljonen, Marja-Liisa Koskiniemi, Jarmo Kause, Antti Restored river habitat provides a natural spawning area for a critically endangered landlocked Atlantic salmon population |
topic_facet |
Research Article |
description |
Supplementing endangered fish populations with captive bred individuals is a common practice in conservation management. The aim of supplementary releases from hatchery broodstocks is to maintain the viability of populations by maintaining their genetic diversity. Landlocked Lake Saimaa salmon (Salmo salar m. sebago) has been critically endangered for the past half-century. As a result of anthropogenic disturbance, especially construction of hydroelectric power plants, the Lake Saimaa salmon has become completely dependent on hatchery broodstock. Recently, habitat restoration has been done in one of the former spawning rivers with the aim of creating a new natural spawning ground for the critically endangered population. Hatchery fish releases have also been revised so that in addition to juveniles, adult fish from the hatchery and from the wild have been released into the restored river. We assessed here if a restored river stretch can be used as a natural spawning ground and juvenile production area with the aim of improving genetic diversity of the critically endangered Lake Saimaa salmon. By constructing a pedigree of the released adults, and juveniles sampled from the restored river, we found that the majority of the released adults had produced offspring in the river. We also found that wild-caught spawners that were released into the restored river had much higher reproductive success than hatchery-reared parents that were released into the restored river at the same time. We found no significant differences in genetic diversity between the parent and offspring generations. Meanwhile, relatedness among different groups of adults and juveniles varied a lot. For example, while the hatchery-reared females were on average half-siblings, wild-caught females showed no significant relatedness. This highlights the importance of using pedigree information in planning the conservation and management of endangered populations, especially when artificial propagation is involved. |
format |
Text |
author |
Leinonen, Tuomas Piironen, Jorma Koljonen, Marja-Liisa Koskiniemi, Jarmo Kause, Antti |
author_facet |
Leinonen, Tuomas Piironen, Jorma Koljonen, Marja-Liisa Koskiniemi, Jarmo Kause, Antti |
author_sort |
Leinonen, Tuomas |
title |
Restored river habitat provides a natural spawning area for a critically endangered landlocked Atlantic salmon population |
title_short |
Restored river habitat provides a natural spawning area for a critically endangered landlocked Atlantic salmon population |
title_full |
Restored river habitat provides a natural spawning area for a critically endangered landlocked Atlantic salmon population |
title_fullStr |
Restored river habitat provides a natural spawning area for a critically endangered landlocked Atlantic salmon population |
title_full_unstemmed |
Restored river habitat provides a natural spawning area for a critically endangered landlocked Atlantic salmon population |
title_sort |
restored river habitat provides a natural spawning area for a critically endangered landlocked atlantic salmon population |
publisher |
Public Library of Science |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7241772/ http://www.ncbi.nlm.nih.gov/pubmed/32437447 https://doi.org/10.1371/journal.pone.0232723 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
PLoS One |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7241772/ http://www.ncbi.nlm.nih.gov/pubmed/32437447 http://dx.doi.org/10.1371/journal.pone.0232723 |
op_rights |
© 2020 Leinonen et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0232723 |
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PLOS ONE |
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15 |
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5 |
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e0232723 |
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