Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations
Marine aquaculture of Atlantic salmon (Salmo salar) is a relatively new industry where breeding programs have led to rapid genetic change in the captive populations that were built up alongside conspecific wild individuals. Throughout its 50-years history, marine aquaculture of Atlantic salmon has b...
Published in: | ICES Journal of Marine Science |
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Online Access: | https://hdl.handle.net/11250/2999224 https://doi.org/10.1093/icesjms/fsac060 |
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ftimr:oai:imr.brage.unit.no:11250/2999224 2023-05-15T15:29:57+02:00 Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations Diserud, Ola Håvard Fiske, Peder Karlsson, Sten Glover, Kevin Alan Næsje, Tor Aronsen, Tonje Bakke, Gunnar O Barlaup, Bjørn Torgeir Erkinaro, J. Florø-Larsen, Bjørn Foldvik, Anders Heino, Mikko Petteri Kanstad-Hanssen, Øyvind Lo, Håvard Lund, Roar Asbjørn Muladal, R. Niemela, E. Økland, Finn Østborg, Gunnel Marie Otterå, Håkon Magne Skaala, Øystein Skoglund, Helge Solberg, Ingrid Solberg, Monica Favnebøe Sollien, Vegard Pedersen Sægrov, Harald Urdal, Kurt Wennevik, Vidar Hindar, Kjetil 2022 application/pdf https://hdl.handle.net/11250/2999224 https://doi.org/10.1093/icesjms/fsac060 eng eng Andre: Miljødirektoratet Egen institusjon: Norwegian institute for nature research (NINA) Norges forskningsråd: 254852 Andre: Fiskeridirektoratet Norges forskningsråd: 216105 urn:issn:1054-3139 https://hdl.handle.net/11250/2999224 https://doi.org/10.1093/icesjms/fsac060 cristin:2018170 ICES Journal of Marine Science VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Peer reviewed Journal article 2022 ftimr https://doi.org/10.1093/icesjms/fsac060 2022-06-22T22:40:31Z Marine aquaculture of Atlantic salmon (Salmo salar) is a relatively new industry where breeding programs have led to rapid genetic change in the captive populations that were built up alongside conspecific wild individuals. Throughout its 50-years history, marine aquaculture of Atlantic salmon has been associated with escapes, and studies have shown that escapees may enter rivers, spawn successfully, and this may lead to farmed-to-wild genetic introgression and maladaptation in wild populations. Yet, an open question is what factors can best explain the variability in the proportion of farmed escapees in wild populations, and when present, which additional factors lead to introgression. Here, we combine two large-scale data sets from monitoring escaped farmed salmon and introgression in Norwegian rivers between 2006 and 2018 to model how anthropogenic, environmental, and population factors influence proportion of escapees and level of introgression.We found that increasing farming intensity and river discharge increase the expected proportions of escaped farmed salmon in rivers, whereas a larger wild salmon population size reduces the expected proportion of escapees despite increasing the expected absolute numbers of escaped farmed salmon. On a large scale, introgression is primarily a function of proportions of escaped farmed salmon, and only to a minor extent a function of local environmental factors or salmon population characteristics. This suggests that as long as salmon aquaculture is based on technologies where non-sterile fish can escape, all anadromous wild Atlantic salmon populations are at risk. Largemarine protected areaswithout salmon aquaculture may slow down the rate of intrusion and introgression by increasing the distance between intensive aquaculture and wild populations. admixture, aquaculture, Atlantic salmon, escaped farmed salmon, gene flow, Salmo salar. publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar Institute for Marine Research: Brage IMR ICES Journal of Marine Science 79 4 1363 1379 |
institution |
Open Polar |
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Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Diserud, Ola Håvard Fiske, Peder Karlsson, Sten Glover, Kevin Alan Næsje, Tor Aronsen, Tonje Bakke, Gunnar O Barlaup, Bjørn Torgeir Erkinaro, J. Florø-Larsen, Bjørn Foldvik, Anders Heino, Mikko Petteri Kanstad-Hanssen, Øyvind Lo, Håvard Lund, Roar Asbjørn Muladal, R. Niemela, E. Økland, Finn Østborg, Gunnel Marie Otterå, Håkon Magne Skaala, Øystein Skoglund, Helge Solberg, Ingrid Solberg, Monica Favnebøe Sollien, Vegard Pedersen Sægrov, Harald Urdal, Kurt Wennevik, Vidar Hindar, Kjetil Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
Marine aquaculture of Atlantic salmon (Salmo salar) is a relatively new industry where breeding programs have led to rapid genetic change in the captive populations that were built up alongside conspecific wild individuals. Throughout its 50-years history, marine aquaculture of Atlantic salmon has been associated with escapes, and studies have shown that escapees may enter rivers, spawn successfully, and this may lead to farmed-to-wild genetic introgression and maladaptation in wild populations. Yet, an open question is what factors can best explain the variability in the proportion of farmed escapees in wild populations, and when present, which additional factors lead to introgression. Here, we combine two large-scale data sets from monitoring escaped farmed salmon and introgression in Norwegian rivers between 2006 and 2018 to model how anthropogenic, environmental, and population factors influence proportion of escapees and level of introgression.We found that increasing farming intensity and river discharge increase the expected proportions of escaped farmed salmon in rivers, whereas a larger wild salmon population size reduces the expected proportion of escapees despite increasing the expected absolute numbers of escaped farmed salmon. On a large scale, introgression is primarily a function of proportions of escaped farmed salmon, and only to a minor extent a function of local environmental factors or salmon population characteristics. This suggests that as long as salmon aquaculture is based on technologies where non-sterile fish can escape, all anadromous wild Atlantic salmon populations are at risk. Largemarine protected areaswithout salmon aquaculture may slow down the rate of intrusion and introgression by increasing the distance between intensive aquaculture and wild populations. admixture, aquaculture, Atlantic salmon, escaped farmed salmon, gene flow, Salmo salar. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Diserud, Ola Håvard Fiske, Peder Karlsson, Sten Glover, Kevin Alan Næsje, Tor Aronsen, Tonje Bakke, Gunnar O Barlaup, Bjørn Torgeir Erkinaro, J. Florø-Larsen, Bjørn Foldvik, Anders Heino, Mikko Petteri Kanstad-Hanssen, Øyvind Lo, Håvard Lund, Roar Asbjørn Muladal, R. Niemela, E. Økland, Finn Østborg, Gunnel Marie Otterå, Håkon Magne Skaala, Øystein Skoglund, Helge Solberg, Ingrid Solberg, Monica Favnebøe Sollien, Vegard Pedersen Sægrov, Harald Urdal, Kurt Wennevik, Vidar Hindar, Kjetil |
author_facet |
Diserud, Ola Håvard Fiske, Peder Karlsson, Sten Glover, Kevin Alan Næsje, Tor Aronsen, Tonje Bakke, Gunnar O Barlaup, Bjørn Torgeir Erkinaro, J. Florø-Larsen, Bjørn Foldvik, Anders Heino, Mikko Petteri Kanstad-Hanssen, Øyvind Lo, Håvard Lund, Roar Asbjørn Muladal, R. Niemela, E. Økland, Finn Østborg, Gunnel Marie Otterå, Håkon Magne Skaala, Øystein Skoglund, Helge Solberg, Ingrid Solberg, Monica Favnebøe Sollien, Vegard Pedersen Sægrov, Harald Urdal, Kurt Wennevik, Vidar Hindar, Kjetil |
author_sort |
Diserud, Ola Håvard |
title |
Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations |
title_short |
Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations |
title_full |
Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations |
title_fullStr |
Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations |
title_full_unstemmed |
Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations |
title_sort |
natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild norwegian atlantic salmon populations |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/2999224 https://doi.org/10.1093/icesjms/fsac060 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
ICES Journal of Marine Science |
op_relation |
Andre: Miljødirektoratet Egen institusjon: Norwegian institute for nature research (NINA) Norges forskningsråd: 254852 Andre: Fiskeridirektoratet Norges forskningsråd: 216105 urn:issn:1054-3139 https://hdl.handle.net/11250/2999224 https://doi.org/10.1093/icesjms/fsac060 cristin:2018170 |
op_doi |
https://doi.org/10.1093/icesjms/fsac060 |
container_title |
ICES Journal of Marine Science |
container_volume |
79 |
container_issue |
4 |
container_start_page |
1363 |
op_container_end_page |
1379 |
_version_ |
1766360409193840640 |