Différenciation génétique à fine échelle d'ombles chevaliers anadromes (Salvelinus alpinus) entre des frayères d'un même bassin versant au Nunavut
The presence of several genetically differentiated populations with different phenotypic characteristics, termed biocomplexity, can have a positive impact on the profitability and sustainability of fisheries. Recently, acoustic telemetry and genomic data provided evidence that anadromous Arctic Char...
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Université Laval
2021
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fttriple:oai:gotriple.eu:http://hdl.handle.net/20.500.11794/71269 2023-05-15T14:56:36+02:00 Différenciation génétique à fine échelle d'ombles chevaliers anadromes (Salvelinus alpinus) entre des frayères d'un même bassin versant au Nunavut Fine-scale genetic differentiation of anadromous knives (Salvelinus alpinus) between spawners in the same catchment area in the Nunavut Sévigny, Maude Moore, Jean-Sébastien Nunavut Victoria, Île 2021-01-01 https://hdl.handle.net/20.500.11794/71269 fr fre Université Laval http://hdl.handle.net/20.500.11794/71269 other CorpusUL envir geo Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2021 fttriple https://doi.org/20.500.11794/71269 2023-01-22T18:38:52Z The presence of several genetically differentiated populations with different phenotypic characteristics, termed biocomplexity, can have a positive impact on the profitability and sustainability of fisheries. Recently, acoustic telemetry and genomic data provided evidence that anadromous Arctic Char (Salvelinus alpinus) on southern Victoria Island, Nunavut, generally home to natal rivers for spawning yet the prevalence of intra-system philopatry remains unclear. The main objective of this study was to assess the potential for finer-scale homing that is, to specific spawning locations within the Ekalluk River watershed which supports the largest active commercial quota for Arctic Char in Canada. More specifically, using genomic approaches, the project aimed to: (1) test for the presence of significant genomic differentiation among spawning stocks within the watershed; (2)look for highly differentiated markers which may suggest the potential for local adaptation; and (3) validate the presence of philopatry to spawning locations using acoustic telemetry. Genomic data (genotyping by sequencing, 14,617 single-nucleotide polymorphism (SNPs) markers) for Arctic Char from five different lakes revealed weak but significant population structure (mean pairwise F[indice ST] = 0.013). Population assignment success was generally high assigning individuals to their capture location (overall mean of 91.55% success rate) indicating that the development of a mixed-stock fishery genomic-derived tool is possible (assuming all possible locations of origin are sampled). We also identified highly differentiated genomic regions that could potentially be under selection, thus indicating the possibility of within-watershed local adaptation - a hypothesis that would require more data to test appropriately. Finally, the acoustic telemetry data obtained from 82 tagged fish from four different locations indicated great variability in individual movements among the habitats used for foraging, spawning and overwintering, indicating that, while ... Thesis Arctic Nunavut Salvelinus alpinus Victoria Island victoria island Unknown Arctic Nunavut Canada Ekalluk River ENVELOPE(-106.296,-106.296,69.404,69.404) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
French |
topic |
envir geo |
spellingShingle |
envir geo Sévigny, Maude Différenciation génétique à fine échelle d'ombles chevaliers anadromes (Salvelinus alpinus) entre des frayères d'un même bassin versant au Nunavut |
topic_facet |
envir geo |
description |
The presence of several genetically differentiated populations with different phenotypic characteristics, termed biocomplexity, can have a positive impact on the profitability and sustainability of fisheries. Recently, acoustic telemetry and genomic data provided evidence that anadromous Arctic Char (Salvelinus alpinus) on southern Victoria Island, Nunavut, generally home to natal rivers for spawning yet the prevalence of intra-system philopatry remains unclear. The main objective of this study was to assess the potential for finer-scale homing that is, to specific spawning locations within the Ekalluk River watershed which supports the largest active commercial quota for Arctic Char in Canada. More specifically, using genomic approaches, the project aimed to: (1) test for the presence of significant genomic differentiation among spawning stocks within the watershed; (2)look for highly differentiated markers which may suggest the potential for local adaptation; and (3) validate the presence of philopatry to spawning locations using acoustic telemetry. Genomic data (genotyping by sequencing, 14,617 single-nucleotide polymorphism (SNPs) markers) for Arctic Char from five different lakes revealed weak but significant population structure (mean pairwise F[indice ST] = 0.013). Population assignment success was generally high assigning individuals to their capture location (overall mean of 91.55% success rate) indicating that the development of a mixed-stock fishery genomic-derived tool is possible (assuming all possible locations of origin are sampled). We also identified highly differentiated genomic regions that could potentially be under selection, thus indicating the possibility of within-watershed local adaptation - a hypothesis that would require more data to test appropriately. Finally, the acoustic telemetry data obtained from 82 tagged fish from four different locations indicated great variability in individual movements among the habitats used for foraging, spawning and overwintering, indicating that, while ... |
author2 |
Moore, Jean-Sébastien |
format |
Thesis |
author |
Sévigny, Maude |
author_facet |
Sévigny, Maude |
author_sort |
Sévigny, Maude |
title |
Différenciation génétique à fine échelle d'ombles chevaliers anadromes (Salvelinus alpinus) entre des frayères d'un même bassin versant au Nunavut |
title_short |
Différenciation génétique à fine échelle d'ombles chevaliers anadromes (Salvelinus alpinus) entre des frayères d'un même bassin versant au Nunavut |
title_full |
Différenciation génétique à fine échelle d'ombles chevaliers anadromes (Salvelinus alpinus) entre des frayères d'un même bassin versant au Nunavut |
title_fullStr |
Différenciation génétique à fine échelle d'ombles chevaliers anadromes (Salvelinus alpinus) entre des frayères d'un même bassin versant au Nunavut |
title_full_unstemmed |
Différenciation génétique à fine échelle d'ombles chevaliers anadromes (Salvelinus alpinus) entre des frayères d'un même bassin versant au Nunavut |
title_sort |
différenciation génétique à fine échelle d'ombles chevaliers anadromes (salvelinus alpinus) entre des frayères d'un même bassin versant au nunavut |
publisher |
Université Laval |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.11794/71269 |
op_coverage |
Nunavut Victoria, Île |
long_lat |
ENVELOPE(-106.296,-106.296,69.404,69.404) |
geographic |
Arctic Nunavut Canada Ekalluk River |
geographic_facet |
Arctic Nunavut Canada Ekalluk River |
genre |
Arctic Nunavut Salvelinus alpinus Victoria Island victoria island |
genre_facet |
Arctic Nunavut Salvelinus alpinus Victoria Island victoria island |
op_source |
CorpusUL |
op_relation |
http://hdl.handle.net/20.500.11794/71269 |
op_rights |
other |
op_doi |
https://doi.org/20.500.11794/71269 |
_version_ |
1766328684172541952 |