Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles
The Saimaa landlocked salmon (Salmo salar m. sebago) in Finland is a critically endangered ecomorph due to the historical damming of rivers. The morph has been dependent on stockings of hatchery-reared juveniles for more than 40 years. Recently, various efforts have been taken to restore some of the...
Published in: | Proceedings of the 5th European Congress of Conservation Biology |
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Open Science Centre, University of Jyväskylä
2018
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Online Access: | https://doi.org/10.17011/conference/eccb2018/108116 http://urn.fi/ |
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ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/62315 2023-05-15T18:09:57+02:00 Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles Kortet, Raine Hatanpää, Aurora Huuskonen, Hannu Kekäläinen, Jukka Hyvärinen, Pekka Vitelletti, Maria Piironen, Jorma 2018 text/html fulltext https://doi.org/10.17011/conference/eccb2018/108116 http://urn.fi/ eng eng Open Science Centre, University of Jyväskylä https://peerageofscience.org/conference/eccb2018/108116/ ECCB2018: 5th European Congress of Conservation Biology. 12th - 15th of June 2018, Jyväskylä, Finland Kortet, R., Hatanpää, A., Huuskonen, H., Kekäläinen, J., Hyvärinen, P., Vitelletti, M. and Piironen, J. (2018). Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles. 5th European Congress of Conservation Biology. doi:10.17011/conference/eccb2018/108116 doi:10.17011/conference/eccb2018/108116 http://urn.fi/ CC BY 4.0 © the Authors, 2018 openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Article http://purl.org/eprint/type/ConferenceItem conference paper not in proceedings publishedVersion conferenceObject 2018 ftjyvaeskylaenun https://doi.org/10.17011/conference/eccb2018/108116 2021-09-23T20:24:31Z The Saimaa landlocked salmon (Salmo salar m. sebago) in Finland is a critically endangered ecomorph due to the historical damming of rivers. The morph has been dependent on stockings of hatchery-reared juveniles for more than 40 years. Recently, various efforts have been taken to restore some of the earlier reproduction areas to return the natural life cycle. However, as the population has been reared in hatcheries over many generations and as the released fish generally suffer high post-release mortality, it is crucial to know whether domestication has affected the population’s fitness-related traits and to assess how the developmental environment affects salmon’s phenotype. In the present experiment, we studied the role of the early developmental environment in trait formation by comparing juveniles (0+ years) from three different backgrounds: 1) semi-wild fish from the River Ala-Koitajoki (stocked as alevins), 2) fish grown in standard hatchery rearing conditions and 3) fish grown in enriched hatchery rearing conditions. All the study fish originated from the same generation and had the same genetic background. We tested their capability of feeding on natural prey, critical swimming speed and studied their morphology. Our preliminary analyses indicate notable background-dependent variation in all the studied traits. Semi-wild fish consumed more natural prey items, had higher critical swimming speed and differed in their fin morphology, when compared to hatchery reared fish. The developmental environment seems to produce differences in key traits, but how this is linked to survival in the wild remains to be studied in the near future. peerReviewed Article in Journal/Newspaper Salmo salar JYX - Jyväskylä University Digital Archive Proceedings of the 5th European Congress of Conservation Biology |
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Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
description |
The Saimaa landlocked salmon (Salmo salar m. sebago) in Finland is a critically endangered ecomorph due to the historical damming of rivers. The morph has been dependent on stockings of hatchery-reared juveniles for more than 40 years. Recently, various efforts have been taken to restore some of the earlier reproduction areas to return the natural life cycle. However, as the population has been reared in hatcheries over many generations and as the released fish generally suffer high post-release mortality, it is crucial to know whether domestication has affected the population’s fitness-related traits and to assess how the developmental environment affects salmon’s phenotype. In the present experiment, we studied the role of the early developmental environment in trait formation by comparing juveniles (0+ years) from three different backgrounds: 1) semi-wild fish from the River Ala-Koitajoki (stocked as alevins), 2) fish grown in standard hatchery rearing conditions and 3) fish grown in enriched hatchery rearing conditions. All the study fish originated from the same generation and had the same genetic background. We tested their capability of feeding on natural prey, critical swimming speed and studied their morphology. Our preliminary analyses indicate notable background-dependent variation in all the studied traits. Semi-wild fish consumed more natural prey items, had higher critical swimming speed and differed in their fin morphology, when compared to hatchery reared fish. The developmental environment seems to produce differences in key traits, but how this is linked to survival in the wild remains to be studied in the near future. peerReviewed |
format |
Article in Journal/Newspaper |
author |
Kortet, Raine Hatanpää, Aurora Huuskonen, Hannu Kekäläinen, Jukka Hyvärinen, Pekka Vitelletti, Maria Piironen, Jorma |
spellingShingle |
Kortet, Raine Hatanpää, Aurora Huuskonen, Hannu Kekäläinen, Jukka Hyvärinen, Pekka Vitelletti, Maria Piironen, Jorma Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles |
author_facet |
Kortet, Raine Hatanpää, Aurora Huuskonen, Hannu Kekäläinen, Jukka Hyvärinen, Pekka Vitelletti, Maria Piironen, Jorma |
author_sort |
Kortet, Raine |
title |
Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles |
title_short |
Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles |
title_full |
Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles |
title_fullStr |
Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles |
title_full_unstemmed |
Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles |
title_sort |
foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles |
publisher |
Open Science Centre, University of Jyväskylä |
publishDate |
2018 |
url |
https://doi.org/10.17011/conference/eccb2018/108116 http://urn.fi/ |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_relation |
https://peerageofscience.org/conference/eccb2018/108116/ ECCB2018: 5th European Congress of Conservation Biology. 12th - 15th of June 2018, Jyväskylä, Finland Kortet, R., Hatanpää, A., Huuskonen, H., Kekäläinen, J., Hyvärinen, P., Vitelletti, M. and Piironen, J. (2018). Foraging, swimming performance and morphology of semi-wild and hatchery-reared landlocked salmon juveniles. 5th European Congress of Conservation Biology. doi:10.17011/conference/eccb2018/108116 doi:10.17011/conference/eccb2018/108116 http://urn.fi/ |
op_rights |
CC BY 4.0 © the Authors, 2018 openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.17011/conference/eccb2018/108116 |
container_title |
Proceedings of the 5th European Congress of Conservation Biology |
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1766182661030674432 |