Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater
- Each year, hundreds of thousands of farmed Atlantic salmon escape from fish farms into the wild. Some of these escapees enter freshwater, and manage to interbreed with native populations. To hinder further genetic introgression in native populations, the use of sterile triploid salmon within comme...
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Online Access: | http://hdl.handle.net/11250/2398358 https://doi.org/10.1007/s10530-016-1066-9 |
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ftimr:oai:imr.brage.unit.no:11250/2398358 2023-05-15T15:30:45+02:00 Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater Glover, Kevin Bos, J. B. Urdal, Kurt Madhun, Abdullah Sami Sørvik, Anne Grete Eide Unneland, Laila Seliussen, Bjørghild Breistein Skaala, Øystein Skilbrei, Ove Tang, Y. Wennevik, Vidar 2016-08-08T13:16:40Z application/pdf http://hdl.handle.net/11250/2398358 https://doi.org/10.1007/s10530-016-1066-9 eng eng Springer Glover, K.A., Bos, J.B., Urdal, K. et al. Biol Invasions (2016) 18: 1287. doi:10.1007/s10530-016-1066-9 urn:issn:1573-1464 http://hdl.handle.net/11250/2398358 https://doi.org/10.1007/s10530-016-1066-9 cristin:1363974 Navngivelse-DelPåSammeVilkår 3.0 Norge http://creativecommons.org/licenses/by-sa/3.0/no/ CC-BY-SA 1287-1294 18 Biological Invasions 5 Journal article Peer reviewed 2016 ftimr https://doi.org/10.1007/s10530-016-1066-9 2021-09-23T20:14:59Z - Each year, hundreds of thousands of farmed Atlantic salmon escape from fish farms into the wild. Some of these escapees enter freshwater, and manage to interbreed with native populations. To hinder further genetic introgression in native populations, the use of sterile triploid salmon within commercial aquaculture is being examined. However, if triploid escapees migrate into freshwater, they may still have ecological impacts on local populations. In the present study, we used microsatellite DNA genotyping to determine the ploidy of 3794 farmed escapees captured in 17 Norwegian rivers in the period 2007–2014. Although a previous study has reported an average of 2 % triploids in Norwegian fish farms during this exact period, here, we only observed 7 (0.18 %) triploids among the escapees captured in freshwater. In addition, we identified three trisomic escapees. For the triploids where the within-river capture location was determined, they were only observed in the lower reaches and not on the spawning grounds. It is concluded that propensity for triploid Atlantic salmon to migrate into freshwater following escape from a fish farm is significantly lower than for normal diploid salmon escapees. Therefore, commercial production of triploids should not only be seen as an effective way of stopping genetic introgression, it will also significantly reduce the numbers of escapees entering rivers, which in turn limits ecological interactions and potential disease transmission. Article in Journal/Newspaper Atlantic salmon Institute for Marine Research: Brage IMR Biological Invasions 18 5 1287 1294 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
- Each year, hundreds of thousands of farmed Atlantic salmon escape from fish farms into the wild. Some of these escapees enter freshwater, and manage to interbreed with native populations. To hinder further genetic introgression in native populations, the use of sterile triploid salmon within commercial aquaculture is being examined. However, if triploid escapees migrate into freshwater, they may still have ecological impacts on local populations. In the present study, we used microsatellite DNA genotyping to determine the ploidy of 3794 farmed escapees captured in 17 Norwegian rivers in the period 2007–2014. Although a previous study has reported an average of 2 % triploids in Norwegian fish farms during this exact period, here, we only observed 7 (0.18 %) triploids among the escapees captured in freshwater. In addition, we identified three trisomic escapees. For the triploids where the within-river capture location was determined, they were only observed in the lower reaches and not on the spawning grounds. It is concluded that propensity for triploid Atlantic salmon to migrate into freshwater following escape from a fish farm is significantly lower than for normal diploid salmon escapees. Therefore, commercial production of triploids should not only be seen as an effective way of stopping genetic introgression, it will also significantly reduce the numbers of escapees entering rivers, which in turn limits ecological interactions and potential disease transmission. |
format |
Article in Journal/Newspaper |
author |
Glover, Kevin Bos, J. B. Urdal, Kurt Madhun, Abdullah Sami Sørvik, Anne Grete Eide Unneland, Laila Seliussen, Bjørghild Breistein Skaala, Øystein Skilbrei, Ove Tang, Y. Wennevik, Vidar |
spellingShingle |
Glover, Kevin Bos, J. B. Urdal, Kurt Madhun, Abdullah Sami Sørvik, Anne Grete Eide Unneland, Laila Seliussen, Bjørghild Breistein Skaala, Øystein Skilbrei, Ove Tang, Y. Wennevik, Vidar Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater |
author_facet |
Glover, Kevin Bos, J. B. Urdal, Kurt Madhun, Abdullah Sami Sørvik, Anne Grete Eide Unneland, Laila Seliussen, Bjørghild Breistein Skaala, Øystein Skilbrei, Ove Tang, Y. Wennevik, Vidar |
author_sort |
Glover, Kevin |
title |
Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater |
title_short |
Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater |
title_full |
Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater |
title_fullStr |
Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater |
title_full_unstemmed |
Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater |
title_sort |
genetic screening of farmed atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater |
publisher |
Springer |
publishDate |
2016 |
url |
http://hdl.handle.net/11250/2398358 https://doi.org/10.1007/s10530-016-1066-9 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
1287-1294 18 Biological Invasions 5 |
op_relation |
Glover, K.A., Bos, J.B., Urdal, K. et al. Biol Invasions (2016) 18: 1287. doi:10.1007/s10530-016-1066-9 urn:issn:1573-1464 http://hdl.handle.net/11250/2398358 https://doi.org/10.1007/s10530-016-1066-9 cristin:1363974 |
op_rights |
Navngivelse-DelPåSammeVilkår 3.0 Norge http://creativecommons.org/licenses/by-sa/3.0/no/ |
op_rightsnorm |
CC-BY-SA |
op_doi |
https://doi.org/10.1007/s10530-016-1066-9 |
container_title |
Biological Invasions |
container_volume |
18 |
container_issue |
5 |
container_start_page |
1287 |
op_container_end_page |
1294 |
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1766361206898032640 |