Genetic structure of Atlantic salmon populations in France
This thesis investigates the genetic structure among Atlantic salmon populations from France. We more specifically studied the influence of environmental factors and stocking on the spatial distribution of genetic diversity. We genotyped at 17 microsatellite markers 1739 individuals from 34 French r...
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ftccsdartic:oai:HAL:tel-02921531v1 2023-05-15T15:31:12+02:00 Genetic structure of Atlantic salmon populations in France Structure génétique des populations de saumon Atlantique en France Perrier, Charles Université de Caen Normandie (UNICAEN) Normandie Université (NU) Université de Caen Jean-Luc Baglinière René Guyomard 2010-12-10 https://hal.inrae.fr/tel-02921531 https://hal.inrae.fr/tel-02921531/document https://hal.inrae.fr/tel-02921531/file/0R7-Thesis.PHD.Perrier2010.pdf fr fre HAL CCSD tel-02921531 https://hal.inrae.fr/tel-02921531 https://hal.inrae.fr/tel-02921531/document https://hal.inrae.fr/tel-02921531/file/0R7-Thesis.PHD.Perrier2010.pdf info:eu-repo/semantics/OpenAccess https://hal.inrae.fr/tel-02921531 Sciences du Vivant [q-bio]. Université de Caen, 2010. Français microchemistry local adaptation genetic structure Atlantic salmon introgression microsatellite markers otolith simulations stocking adaptation locale repeuplements saumon Atlantique structure génétique [SDV]Life Sciences [q-bio] info:eu-repo/semantics/doctoralThesis Theses 2010 ftccsdartic 2021-10-24T00:45:00Z This thesis investigates the genetic structure among Atlantic salmon populations from France. We more specifically studied the influence of environmental factors and stocking on the spatial distribution of genetic diversity. We genotyped at 17 microsatellite markers 1739 individuals from 34 French rivers, from old (1965-1987) and recent (1998-2006) cohorts. Analyses of recent samples classed individuals into five genetically and geographically distinct groups. Distance among estuaries and river length were strong predictors of population structure. Moreover, the positive trend between body size and river length and the higher differentiation of the population having farthest spawning grounds off the river mouth suggest local adaptation to upstream migration difficulty. Comparison of recent and old samples showed a general reduction of differentiation among populations and some high introgression rates most probably resulting from stocking. In some depopulated rivers were no stocking was performed we observed natural recolonization by fish from neighbouring and distant stocks. To quantify the impact of stocking on some populations for which it was precisely documented, we developed an approach using temporally explicit simulations. This study suggests low fitness of stocking fish. In parallel to genetic analyses, we carried on microchemistry analyses of otolith from some fish from stocked populations. Coupling genetic and microchemistry analyses on the same individuals allowed identifying river-born fish with hatchery pedigrees, discriminating them from hatchery-born fish with same genetic characteristics. Cette thèse porte sur la structuration génétique des populations françaises de saumon Atlantique. Nous avons notamment étudié l’effet de facteurs environnementaux et des repeuplements sur la distribution spatiale de la diversité génétique. 1739 individus échantillonnés dans 34 rivières et provenant de cohortes anciennes (1965-1987) et récentes (1998-2006) ont été génotypés à 17 marqueurs microsatellites. Les ... Doctoral or Postdoctoral Thesis Atlantic salmon Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
microchemistry local adaptation genetic structure Atlantic salmon introgression microsatellite markers otolith simulations stocking adaptation locale repeuplements saumon Atlantique structure génétique [SDV]Life Sciences [q-bio] |
spellingShingle |
microchemistry local adaptation genetic structure Atlantic salmon introgression microsatellite markers otolith simulations stocking adaptation locale repeuplements saumon Atlantique structure génétique [SDV]Life Sciences [q-bio] Perrier, Charles Genetic structure of Atlantic salmon populations in France |
topic_facet |
microchemistry local adaptation genetic structure Atlantic salmon introgression microsatellite markers otolith simulations stocking adaptation locale repeuplements saumon Atlantique structure génétique [SDV]Life Sciences [q-bio] |
description |
This thesis investigates the genetic structure among Atlantic salmon populations from France. We more specifically studied the influence of environmental factors and stocking on the spatial distribution of genetic diversity. We genotyped at 17 microsatellite markers 1739 individuals from 34 French rivers, from old (1965-1987) and recent (1998-2006) cohorts. Analyses of recent samples classed individuals into five genetically and geographically distinct groups. Distance among estuaries and river length were strong predictors of population structure. Moreover, the positive trend between body size and river length and the higher differentiation of the population having farthest spawning grounds off the river mouth suggest local adaptation to upstream migration difficulty. Comparison of recent and old samples showed a general reduction of differentiation among populations and some high introgression rates most probably resulting from stocking. In some depopulated rivers were no stocking was performed we observed natural recolonization by fish from neighbouring and distant stocks. To quantify the impact of stocking on some populations for which it was precisely documented, we developed an approach using temporally explicit simulations. This study suggests low fitness of stocking fish. In parallel to genetic analyses, we carried on microchemistry analyses of otolith from some fish from stocked populations. Coupling genetic and microchemistry analyses on the same individuals allowed identifying river-born fish with hatchery pedigrees, discriminating them from hatchery-born fish with same genetic characteristics. Cette thèse porte sur la structuration génétique des populations françaises de saumon Atlantique. Nous avons notamment étudié l’effet de facteurs environnementaux et des repeuplements sur la distribution spatiale de la diversité génétique. 1739 individus échantillonnés dans 34 rivières et provenant de cohortes anciennes (1965-1987) et récentes (1998-2006) ont été génotypés à 17 marqueurs microsatellites. Les ... |
author2 |
Université de Caen Normandie (UNICAEN) Normandie Université (NU) Université de Caen Jean-Luc Baglinière René Guyomard |
format |
Doctoral or Postdoctoral Thesis |
author |
Perrier, Charles |
author_facet |
Perrier, Charles |
author_sort |
Perrier, Charles |
title |
Genetic structure of Atlantic salmon populations in France |
title_short |
Genetic structure of Atlantic salmon populations in France |
title_full |
Genetic structure of Atlantic salmon populations in France |
title_fullStr |
Genetic structure of Atlantic salmon populations in France |
title_full_unstemmed |
Genetic structure of Atlantic salmon populations in France |
title_sort |
genetic structure of atlantic salmon populations in france |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.inrae.fr/tel-02921531 https://hal.inrae.fr/tel-02921531/document https://hal.inrae.fr/tel-02921531/file/0R7-Thesis.PHD.Perrier2010.pdf |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
https://hal.inrae.fr/tel-02921531 Sciences du Vivant [q-bio]. Université de Caen, 2010. Français |
op_relation |
tel-02921531 https://hal.inrae.fr/tel-02921531 https://hal.inrae.fr/tel-02921531/document https://hal.inrae.fr/tel-02921531/file/0R7-Thesis.PHD.Perrier2010.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766361695995822080 |