Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland
We characterized the presence of recent divergence in a population of Atlantic salmon (Salmo salar) introduced from Little Salmonier River into Rocky River, Newfoundland ~ 5 generations previously, by quantifying genomic divergence and conducting reciprocal transplant experiments. Genomic evidence b...
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Memorial University of Newfoundland
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ftmemorialuniv:oai:research.library.mun.ca:13131 2023-10-01T03:54:44+02:00 Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland Mason, Gwynhyfar 2018-01 application/pdf https://research.library.mun.ca/13131/ https://research.library.mun.ca/13131/1/thesis.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/13131/1/thesis.pdf Mason, Gwynhyfar <https://research.library.mun.ca/view/creator_az/Mason=3AGwynhyfar=3A=3A.html> (2018) Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland. Masters thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 2018 ftmemorialuniv 2023-09-03T06:49:08Z We characterized the presence of recent divergence in a population of Atlantic salmon (Salmo salar) introduced from Little Salmonier River into Rocky River, Newfoundland ~ 5 generations previously, by quantifying genomic divergence and conducting reciprocal transplant experiments. Genomic evidence based on Bayesian clustering and hybrid characterization using genome-wide single nucleotide polymorphisms support the presence of two populations, one at Little Salmonier, and both at Rocky River with hybridization with non-anadromous residents. In conjunction with evidence of adaptive divergence at ~90 loci, this finding supports the hypothesis of rapid evolution. Reciprocal transplants from controlled lab crosses revealed no significant growth differences between rivers, but higher survivorship in Rocky River. Purebreds outperformed hybrids in both rivers and the laboratory, a finding consistent with outbreeding depression. Overall, the results support the hypothesis of rapid evolution of salmon in Rocky River; with both adaptive evolution and introgression with residents as likely causes. Thesis Atlantic salmon Newfoundland Salmo salar Memorial University of Newfoundland: Research Repository Rocky River ENVELOPE(-97.105,-97.105,58.203,58.203) |
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Memorial University of Newfoundland: Research Repository |
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ftmemorialuniv |
language |
English |
description |
We characterized the presence of recent divergence in a population of Atlantic salmon (Salmo salar) introduced from Little Salmonier River into Rocky River, Newfoundland ~ 5 generations previously, by quantifying genomic divergence and conducting reciprocal transplant experiments. Genomic evidence based on Bayesian clustering and hybrid characterization using genome-wide single nucleotide polymorphisms support the presence of two populations, one at Little Salmonier, and both at Rocky River with hybridization with non-anadromous residents. In conjunction with evidence of adaptive divergence at ~90 loci, this finding supports the hypothesis of rapid evolution. Reciprocal transplants from controlled lab crosses revealed no significant growth differences between rivers, but higher survivorship in Rocky River. Purebreds outperformed hybrids in both rivers and the laboratory, a finding consistent with outbreeding depression. Overall, the results support the hypothesis of rapid evolution of salmon in Rocky River; with both adaptive evolution and introgression with residents as likely causes. |
format |
Thesis |
author |
Mason, Gwynhyfar |
spellingShingle |
Mason, Gwynhyfar Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland |
author_facet |
Mason, Gwynhyfar |
author_sort |
Mason, Gwynhyfar |
title |
Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland |
title_short |
Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland |
title_full |
Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland |
title_fullStr |
Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland |
title_full_unstemmed |
Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland |
title_sort |
genomic and experimental evidence of rapid evolution in an introduced population of atlantic salmon (salmo salar) in rocky river, newfoundland |
publisher |
Memorial University of Newfoundland |
publishDate |
2018 |
url |
https://research.library.mun.ca/13131/ https://research.library.mun.ca/13131/1/thesis.pdf |
long_lat |
ENVELOPE(-97.105,-97.105,58.203,58.203) |
geographic |
Rocky River |
geographic_facet |
Rocky River |
genre |
Atlantic salmon Newfoundland Salmo salar |
genre_facet |
Atlantic salmon Newfoundland Salmo salar |
op_relation |
https://research.library.mun.ca/13131/1/thesis.pdf Mason, Gwynhyfar <https://research.library.mun.ca/view/creator_az/Mason=3AGwynhyfar=3A=3A.html> (2018) Genomic and experimental evidence of rapid evolution in an introduced population of Atlantic salmon (Salmo salar) in Rocky River, Newfoundland. Masters thesis, Memorial University of Newfoundland. |
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thesis_license |
_version_ |
1778522612578648064 |