Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic
Interceptory fisheries represent an ongoing threat to migratory fish stocks particularly when managed in the absence of stock specific catch and exploitation information. Atlantic salmon from the southern portion of the North American range may be subject to exploitation in the commercial and recrea...
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Online Access: | https://hal.science/hal-04200707 https://doi.org/10.1016/j.fishres.2015.10.009 |
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ftccsdartic:oai:HAL:hal-04200707v1 2023-10-09T21:49:54+02:00 Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic Bradbury, Ian R. Hamilton, Lorraine C. Chaput, Gerald Robertson, Martha J. Goraguer, Herle Walsh, Arthur Morris, Vicki Reddin, David Dempson, J. Brian Sheehan, Timothy F. King, Timothy Bernatchez, Louis Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) 2016-02 https://hal.science/hal-04200707 https://doi.org/10.1016/j.fishres.2015.10.009 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2015.10.009 hal-04200707 https://hal.science/hal-04200707 doi:10.1016/j.fishres.2015.10.009 ISSN: 0165-7836 EISSN: 1872-6763 Fisheries Research https://hal.science/hal-04200707 Fisheries Research, 2016, 174, pp.234-244. ⟨10.1016/j.fishres.2015.10.009⟩ [SDU]Sciences of the Universe [physics] [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1016/j.fishres.2015.10.009 2023-09-23T22:56:37Z Interceptory fisheries represent an ongoing threat to migratory fish stocks particularly when managed in the absence of stock specific catch and exploitation information. Atlantic salmon from the southern portion of the North American range may be subject to exploitation in the commercial and recreational salmon fisheries occurring in the French territorial waters surrounding St. Pierre and Miquelon off southern Newfoundland. We evaluated stock composition of Atlantic salmon harvested in the St. Pierre and Miquelon Atlantic salmon fishery using genetic mixture analysis and individual assignment with a microsatellite baseline (15 loci, 12,409 individuals, 12 regional groups) encompassing the species western Atlantic range. Individual salmon were sampled from the St. Pierre and Miquelon fishery over four years (2004, 2011, 2013, and 2014). Biological characteristics indicate significant variation among years in the size and age distribution. Nonetheless, estimates of stock composition of the samples showed consistent dominance of three regions (i.e., Southern Gulf of St. Lawrence, Gaspe Peninsula, and Newfoundland). Together salmon from these regions accounted for more than 70% of annual harvest over the decade examined. Comparison of individual assignments and biological characteristics revealed a trend of declining fresh water age with latitude of assigned region. Moreover, locally harvested Newfoundland salmon were ten times more likely to be small or one sea winter individuals whereas Quebec and Gaspe Peninsula salmon were two-three times more likely to be harvested as large or two sea winter salmon. Estimates of region specific catch were highest for salmon from the southern Gulf of St. Lawrence region ranging from 242 to 887 individuals annually. This work illustrates how genetic analysis of interceptory marine fisheries can directly inform assessment and management efforts in highly migratory marine species. Article in Journal/Newspaper Atlantic salmon Newfoundland Northwest Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Fisheries Research 174 234 244 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] [SDV]Life Sciences [q-bio] |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDV]Life Sciences [q-bio] Bradbury, Ian R. Hamilton, Lorraine C. Chaput, Gerald Robertson, Martha J. Goraguer, Herle Walsh, Arthur Morris, Vicki Reddin, David Dempson, J. Brian Sheehan, Timothy F. King, Timothy Bernatchez, Louis Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDV]Life Sciences [q-bio] |
description |
Interceptory fisheries represent an ongoing threat to migratory fish stocks particularly when managed in the absence of stock specific catch and exploitation information. Atlantic salmon from the southern portion of the North American range may be subject to exploitation in the commercial and recreational salmon fisheries occurring in the French territorial waters surrounding St. Pierre and Miquelon off southern Newfoundland. We evaluated stock composition of Atlantic salmon harvested in the St. Pierre and Miquelon Atlantic salmon fishery using genetic mixture analysis and individual assignment with a microsatellite baseline (15 loci, 12,409 individuals, 12 regional groups) encompassing the species western Atlantic range. Individual salmon were sampled from the St. Pierre and Miquelon fishery over four years (2004, 2011, 2013, and 2014). Biological characteristics indicate significant variation among years in the size and age distribution. Nonetheless, estimates of stock composition of the samples showed consistent dominance of three regions (i.e., Southern Gulf of St. Lawrence, Gaspe Peninsula, and Newfoundland). Together salmon from these regions accounted for more than 70% of annual harvest over the decade examined. Comparison of individual assignments and biological characteristics revealed a trend of declining fresh water age with latitude of assigned region. Moreover, locally harvested Newfoundland salmon were ten times more likely to be small or one sea winter individuals whereas Quebec and Gaspe Peninsula salmon were two-three times more likely to be harvested as large or two sea winter salmon. Estimates of region specific catch were highest for salmon from the southern Gulf of St. Lawrence region ranging from 242 to 887 individuals annually. This work illustrates how genetic analysis of interceptory marine fisheries can directly inform assessment and management efforts in highly migratory marine species. |
author2 |
Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
format |
Article in Journal/Newspaper |
author |
Bradbury, Ian R. Hamilton, Lorraine C. Chaput, Gerald Robertson, Martha J. Goraguer, Herle Walsh, Arthur Morris, Vicki Reddin, David Dempson, J. Brian Sheehan, Timothy F. King, Timothy Bernatchez, Louis |
author_facet |
Bradbury, Ian R. Hamilton, Lorraine C. Chaput, Gerald Robertson, Martha J. Goraguer, Herle Walsh, Arthur Morris, Vicki Reddin, David Dempson, J. Brian Sheehan, Timothy F. King, Timothy Bernatchez, Louis |
author_sort |
Bradbury, Ian R. |
title |
Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic |
title_short |
Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic |
title_full |
Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic |
title_fullStr |
Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic |
title_full_unstemmed |
Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic |
title_sort |
genetic mixed stock analysis of an interceptory atlantic salmon fishery in the northwest atlantic |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-04200707 https://doi.org/10.1016/j.fishres.2015.10.009 |
genre |
Atlantic salmon Newfoundland Northwest Atlantic |
genre_facet |
Atlantic salmon Newfoundland Northwest Atlantic |
op_source |
ISSN: 0165-7836 EISSN: 1872-6763 Fisheries Research https://hal.science/hal-04200707 Fisheries Research, 2016, 174, pp.234-244. ⟨10.1016/j.fishres.2015.10.009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2015.10.009 hal-04200707 https://hal.science/hal-04200707 doi:10.1016/j.fishres.2015.10.009 |
op_doi |
https://doi.org/10.1016/j.fishres.2015.10.009 |
container_title |
Fisheries Research |
container_volume |
174 |
container_start_page |
234 |
op_container_end_page |
244 |
_version_ |
1779312954163855360 |