Fitness consequences of hybridization between wild Newfoundland and farmed European and North American Atlantic salmon
Selection due to multi-generational domestication and genetically distinct origins raises concerns about potential fitness consequences of hybridization between farmed and wild Atlantic salmon. In Newfoundland (NF), Canada, the aquaculture industry uses the North American (NA) Saint John River strai...
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ftdoajarticles:oai:doaj.org/article:a7342a457f8840218d48deea22200318 2023-05-15T15:32:02+02:00 Fitness consequences of hybridization between wild Newfoundland and farmed European and North American Atlantic salmon SS Islam BF Wringe CM Conway IR Bradbury IA Fleming 2022-11-01T00:00:00Z https://doi.org/10.3354/aei00441 https://doaj.org/article/a7342a457f8840218d48deea22200318 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v14/p243-262/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00441 https://doaj.org/article/a7342a457f8840218d48deea22200318 Aquaculture Environment Interactions, Vol 14, Pp 243-262 (2022) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2022 ftdoajarticles https://doi.org/10.3354/aei00441 2023-02-12T01:31:31Z Selection due to multi-generational domestication and genetically distinct origins raises concerns about potential fitness consequences of hybridization between farmed and wild Atlantic salmon. In Newfoundland (NF), Canada, the aquaculture industry uses the North American (NA) Saint John River strain, though site-specific permission has been granted to farm a European origin (EO) strain. We used complementary experiments to investigate differences in (1) dominance status and (2) growth and survival in allopatry (NF wild fish) versus sympatry (NF wild fish with NA/EO farmed individuals and related F1 hybrids) in contrasting tank and semi-natural stream environments. NA farmed salmon were more dominant than NF wild individuals, with hybrids being intermediate in expression and not differing from wild fish. EO farmed salmon also tended to dominate NF wild individuals, but not significantly. Competition with farmed fish and hybrids did not affect the growth of wild fish in sympatry versus allopatry in the tank environment. However, that was not the case in one instance in the stream environment where wild fish in sympatry with NA farmed fish and hybrids outgrew those in allopatry. Within sympatric treatments, both EO and NA farmed salmon outgrew wild individuals in the tank environment, but not always in the stream environment (exception: NA farmed). Hybrids tended to display intermediate growth performance relative to farmed and wild fish in both environments. Survival did not differ among cross types in either environment. These findings suggest that irrespective of distinct origins, both EO and NA farmed salmon displayed greater dominance and growth than NF wild salmon in the tank environment. However, in the stream environment, competition imposed by NA farmed fish and related hybrids on wild fish appeared less than that imposed by the EO strain and related hybrids, as evident in growth performance. Findings thus provide valuable insight into the effects of hybridization and, consequently, fitness-related trait ... Article in Journal/Newspaper Atlantic salmon Newfoundland Directory of Open Access Journals: DOAJ Articles Canada Aquaculture Environment Interactions 14 243 262 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 SS Islam BF Wringe CM Conway IR Bradbury IA Fleming Fitness consequences of hybridization between wild Newfoundland and farmed European and North American Atlantic salmon |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
Selection due to multi-generational domestication and genetically distinct origins raises concerns about potential fitness consequences of hybridization between farmed and wild Atlantic salmon. In Newfoundland (NF), Canada, the aquaculture industry uses the North American (NA) Saint John River strain, though site-specific permission has been granted to farm a European origin (EO) strain. We used complementary experiments to investigate differences in (1) dominance status and (2) growth and survival in allopatry (NF wild fish) versus sympatry (NF wild fish with NA/EO farmed individuals and related F1 hybrids) in contrasting tank and semi-natural stream environments. NA farmed salmon were more dominant than NF wild individuals, with hybrids being intermediate in expression and not differing from wild fish. EO farmed salmon also tended to dominate NF wild individuals, but not significantly. Competition with farmed fish and hybrids did not affect the growth of wild fish in sympatry versus allopatry in the tank environment. However, that was not the case in one instance in the stream environment where wild fish in sympatry with NA farmed fish and hybrids outgrew those in allopatry. Within sympatric treatments, both EO and NA farmed salmon outgrew wild individuals in the tank environment, but not always in the stream environment (exception: NA farmed). Hybrids tended to display intermediate growth performance relative to farmed and wild fish in both environments. Survival did not differ among cross types in either environment. These findings suggest that irrespective of distinct origins, both EO and NA farmed salmon displayed greater dominance and growth than NF wild salmon in the tank environment. However, in the stream environment, competition imposed by NA farmed fish and related hybrids on wild fish appeared less than that imposed by the EO strain and related hybrids, as evident in growth performance. Findings thus provide valuable insight into the effects of hybridization and, consequently, fitness-related trait ... |
format |
Article in Journal/Newspaper |
author |
SS Islam BF Wringe CM Conway IR Bradbury IA Fleming |
author_facet |
SS Islam BF Wringe CM Conway IR Bradbury IA Fleming |
author_sort |
SS Islam |
title |
Fitness consequences of hybridization between wild Newfoundland and farmed European and North American Atlantic salmon |
title_short |
Fitness consequences of hybridization between wild Newfoundland and farmed European and North American Atlantic salmon |
title_full |
Fitness consequences of hybridization between wild Newfoundland and farmed European and North American Atlantic salmon |
title_fullStr |
Fitness consequences of hybridization between wild Newfoundland and farmed European and North American Atlantic salmon |
title_full_unstemmed |
Fitness consequences of hybridization between wild Newfoundland and farmed European and North American Atlantic salmon |
title_sort |
fitness consequences of hybridization between wild newfoundland and farmed european and north american atlantic salmon |
publisher |
Inter-Research |
publishDate |
2022 |
url |
https://doi.org/10.3354/aei00441 https://doaj.org/article/a7342a457f8840218d48deea22200318 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Atlantic salmon Newfoundland |
genre_facet |
Atlantic salmon Newfoundland |
op_source |
Aquaculture Environment Interactions, Vol 14, Pp 243-262 (2022) |
op_relation |
https://www.int-res.com/abstracts/aei/v14/p243-262/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00441 https://doaj.org/article/a7342a457f8840218d48deea22200318 |
op_doi |
https://doi.org/10.3354/aei00441 |
container_title |
Aquaculture Environment Interactions |
container_volume |
14 |
container_start_page |
243 |
op_container_end_page |
262 |
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1766362541769883648 |