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 |
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Canadian Science Publishing
2020
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Online Access: | https://erepo.uef.fi/handle/123456789/8106 |
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ftuniveasternfin:oai:erepo.uef.fi:123456789/8106 2024-06-16T07:38:50+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 Ympäristö- ja biotieteiden laitos / Toiminta 2020-04-30T10:25:28Z 770-778 https://erepo.uef.fi/handle/123456789/8106 englanti unknown Canadian Science Publishing Kanada Canadian journal of fisheries and aquatic sciences http://dx.doi.org/10.1139/cjfas-2019-0079 10.1139/cjfas-2019-0079 0706-652X 4 77 https://erepo.uef.fi/handle/123456789/8106 In copyright 1.0 openAccess © Authors https://rightsstatements.org/page/InC/1.0/ Tieteelliset aikakauslehtiartikkelit A1 article artikkeli 2020 ftuniveasternfin https://doi.org/10.1139/cjfas-2019-0079 2024-05-23T03:07:27Z 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. final draft peerReviewed Article in Journal/Newspaper Atlantic salmon Salmo salar UEF eRepository (University of Eastern Finland) Canadian Journal of Fisheries and Aquatic Sciences 77 4 770 778 |
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Open Polar |
collection |
UEF eRepository (University of Eastern Finland) |
op_collection_id |
ftuniveasternfin |
language |
unknown |
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. final draft peerReviewed |
author2 |
Ympäristö- ja biotieteiden laitos / Toiminta |
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 |
https://erepo.uef.fi/handle/123456789/8106 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Canadian journal of fisheries and aquatic sciences http://dx.doi.org/10.1139/cjfas-2019-0079 10.1139/cjfas-2019-0079 0706-652X 4 77 https://erepo.uef.fi/handle/123456789/8106 |
op_rights |
In copyright 1.0 openAccess © Authors https://rightsstatements.org/page/InC/1.0/ |
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_ |
1802005545051226112 |