Early winter foraging success, swimming performance, and morphology of juvenile landlocked Atlantic salmon reared under semi-wild and hatchery conditions
Several Finnish populations of salmonids have been maintained exclusively by stocking hatchery-reared fish for several generations, and it is crucial to know whether domestication has affected fitness-related traits and to assess how the developmental environment influences fish phenotypes. Here, we...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
2020
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Online Access: | http://dx.doi.org/10.1139/cjfas-2019-0079 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2019-0079 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2019-0079 |
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crcansciencepubl:10.1139/cjfas-2019-0079 2024-09-15T17:56:26+00:00 Early winter foraging success, swimming performance, and morphology of juvenile landlocked Atlantic salmon reared under semi-wild and hatchery conditions Hatanpää, Aurora Huuskonen, Hannu Kekäläinen, Jukka Kortet, Raine Hyvärinen, Pekka Vitelletti, Maria Letizia Piironen, Jorma 2020 http://dx.doi.org/10.1139/cjfas-2019-0079 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2019-0079 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2019-0079 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 77, issue 4, page 770-778 ISSN 0706-652X 1205-7533 journal-article 2020 crcansciencepubl https://doi.org/10.1139/cjfas-2019-0079 2024-07-04T04:10:01Z Several Finnish populations of salmonids have been maintained exclusively by stocking hatchery-reared fish for several generations, and it is crucial to know whether domestication has affected fitness-related traits and to assess how the developmental environment influences fish phenotypes. Here, we focused on Lake Saimaa landlocked salmon (Salmo salar m. sebago) and studied the role of the early rearing environment in trait formation by comparing juveniles (fingerlings) from three backgrounds: (i) semi-wild (stocked as alevins), (ii) standard hatchery, and (iii) enriched hatchery conditions We compared juvenile morphology, swimming performance, and capability of feeding on natural prey in early winter. We found no differences between standard and enriched hatchery conditions. Semi-wild fish consumed more prey items, but wet mass of stomach contents did not differ among backgrounds. Swimming endurance was comparable among backgrounds. Semi-wild fish had slenderer body shape and longer fins than hatchery-reared fish. The lack of performance differences between hatchery juveniles and their semi-wild conspecifics is possibly due to reduced phenotypic plasticity caused by extremely low levels of genetic diversity in this population. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 77 4 770 778 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Several Finnish populations of salmonids have been maintained exclusively by stocking hatchery-reared fish for several generations, and it is crucial to know whether domestication has affected fitness-related traits and to assess how the developmental environment influences fish phenotypes. Here, we focused on Lake Saimaa landlocked salmon (Salmo salar m. sebago) and studied the role of the early rearing environment in trait formation by comparing juveniles (fingerlings) from three backgrounds: (i) semi-wild (stocked as alevins), (ii) standard hatchery, and (iii) enriched hatchery conditions We compared juvenile morphology, swimming performance, and capability of feeding on natural prey in early winter. We found no differences between standard and enriched hatchery conditions. Semi-wild fish consumed more prey items, but wet mass of stomach contents did not differ among backgrounds. Swimming endurance was comparable among backgrounds. Semi-wild fish had slenderer body shape and longer fins than hatchery-reared fish. The lack of performance differences between hatchery juveniles and their semi-wild conspecifics is possibly due to reduced phenotypic plasticity caused by extremely low levels of genetic diversity in this population. |
format |
Article in Journal/Newspaper |
author |
Hatanpää, Aurora Huuskonen, Hannu Kekäläinen, Jukka Kortet, Raine Hyvärinen, Pekka Vitelletti, Maria Letizia Piironen, Jorma |
spellingShingle |
Hatanpää, Aurora Huuskonen, Hannu Kekäläinen, Jukka Kortet, Raine Hyvärinen, Pekka Vitelletti, Maria Letizia Piironen, Jorma Early winter foraging success, swimming performance, and morphology of juvenile landlocked Atlantic salmon reared under semi-wild and hatchery conditions |
author_facet |
Hatanpää, Aurora Huuskonen, Hannu Kekäläinen, Jukka Kortet, Raine Hyvärinen, Pekka Vitelletti, Maria Letizia Piironen, Jorma |
author_sort |
Hatanpää, Aurora |
title |
Early winter foraging success, swimming performance, and morphology of juvenile landlocked Atlantic salmon reared under semi-wild and hatchery conditions |
title_short |
Early winter foraging success, swimming performance, and morphology of juvenile landlocked Atlantic salmon reared under semi-wild and hatchery conditions |
title_full |
Early winter foraging success, swimming performance, and morphology of juvenile landlocked Atlantic salmon reared under semi-wild and hatchery conditions |
title_fullStr |
Early winter foraging success, swimming performance, and morphology of juvenile landlocked Atlantic salmon reared under semi-wild and hatchery conditions |
title_full_unstemmed |
Early winter foraging success, swimming performance, and morphology of juvenile landlocked Atlantic salmon reared under semi-wild and hatchery conditions |
title_sort |
early winter foraging success, swimming performance, and morphology of juvenile landlocked atlantic salmon reared under semi-wild and hatchery conditions |
publisher |
Canadian Science Publishing |
publishDate |
2020 |
url |
http://dx.doi.org/10.1139/cjfas-2019-0079 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2019-0079 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2019-0079 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 77, issue 4, page 770-778 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2019-0079 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
77 |
container_issue |
4 |
container_start_page |
770 |
op_container_end_page |
778 |
_version_ |
1810432641666646016 |