Use of fatty acid profiles to monitor the escape history of farmed Atlantic salmon
Farmed Atlantic salmon can escape from fish farms at various stages of their life, from juveniles to large mature fish. Escapees that enter rivers to spawn pose a threat to the genetic integrity of wild populations. Knowledge about the timing of these escapes can provide important information for wi...
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ftdoajarticles:oai:doaj.org/article:a31e417f1c424ba7a486cdaea54c5a67 2023-05-15T15:31:46+02:00 Use of fatty acid profiles to monitor the escape history of farmed Atlantic salmon OT Skilbrei E Normann S Meier RE Olsen 2015-05-01T00:00:00Z https://doi.org/10.3354/aei00132 https://doaj.org/article/a31e417f1c424ba7a486cdaea54c5a67 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v7/n1/p1-13/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00132 https://doaj.org/article/a31e417f1c424ba7a486cdaea54c5a67 Aquaculture Environment Interactions, Vol 7, Iss 1, Pp 1-13 (2015) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2015 ftdoajarticles https://doi.org/10.3354/aei00132 2022-12-31T09:14:54Z Farmed Atlantic salmon can escape from fish farms at various stages of their life, from juveniles to large mature fish. Escapees that enter rivers to spawn pose a threat to the genetic integrity of wild populations. Knowledge about the timing of these escapes can provide important information for wildlife management and the aquaculture industry, enabling them to prevent or mitigate the negative impacts of escapees. Farmed salmon food has a high content of terrestrial lipids; thus, we used fatty acid (FA) profiling to monitor the escape history of farmed salmon. Escaped salmon captured in rivers (n = 251) presented a wide range of FA profiles that we used to classify the fish as (1) early-escaped wild-like fish that were assumed to have escaped at smolt or early post-smolt stage (24%), (2) recently escaped fish with high levels of FAs typically found in commercial salmon food (61%) and (3) intermediate escapees whose FA profiles lay between those 2 groups (15%). To estimate the size at escape of the intermediate escapees, we performed a feeding experiment that monitored the development of FA profiles after a shift in diet from terrestrial to marine lipids. Most intermediate escapees appeared to have escaped when they were <3 kg, and ranged from 3 to 11 kg when recaptured in rivers. We conclude that FA profiling is a promising tool to monitor escape histories, and that the proportion of post-smolt escapees in this study was high compared to official escape statistics which include very few reports of young fish escaping. Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Aquaculture Environment Interactions 7 1 1 13 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 OT Skilbrei E Normann S Meier RE Olsen Use of fatty acid profiles to monitor the escape history of farmed Atlantic salmon |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
Farmed Atlantic salmon can escape from fish farms at various stages of their life, from juveniles to large mature fish. Escapees that enter rivers to spawn pose a threat to the genetic integrity of wild populations. Knowledge about the timing of these escapes can provide important information for wildlife management and the aquaculture industry, enabling them to prevent or mitigate the negative impacts of escapees. Farmed salmon food has a high content of terrestrial lipids; thus, we used fatty acid (FA) profiling to monitor the escape history of farmed salmon. Escaped salmon captured in rivers (n = 251) presented a wide range of FA profiles that we used to classify the fish as (1) early-escaped wild-like fish that were assumed to have escaped at smolt or early post-smolt stage (24%), (2) recently escaped fish with high levels of FAs typically found in commercial salmon food (61%) and (3) intermediate escapees whose FA profiles lay between those 2 groups (15%). To estimate the size at escape of the intermediate escapees, we performed a feeding experiment that monitored the development of FA profiles after a shift in diet from terrestrial to marine lipids. Most intermediate escapees appeared to have escaped when they were <3 kg, and ranged from 3 to 11 kg when recaptured in rivers. We conclude that FA profiling is a promising tool to monitor escape histories, and that the proportion of post-smolt escapees in this study was high compared to official escape statistics which include very few reports of young fish escaping. |
format |
Article in Journal/Newspaper |
author |
OT Skilbrei E Normann S Meier RE Olsen |
author_facet |
OT Skilbrei E Normann S Meier RE Olsen |
author_sort |
OT Skilbrei |
title |
Use of fatty acid profiles to monitor the escape history of farmed Atlantic salmon |
title_short |
Use of fatty acid profiles to monitor the escape history of farmed Atlantic salmon |
title_full |
Use of fatty acid profiles to monitor the escape history of farmed Atlantic salmon |
title_fullStr |
Use of fatty acid profiles to monitor the escape history of farmed Atlantic salmon |
title_full_unstemmed |
Use of fatty acid profiles to monitor the escape history of farmed Atlantic salmon |
title_sort |
use of fatty acid profiles to monitor the escape history of farmed atlantic salmon |
publisher |
Inter-Research |
publishDate |
2015 |
url |
https://doi.org/10.3354/aei00132 https://doaj.org/article/a31e417f1c424ba7a486cdaea54c5a67 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Aquaculture Environment Interactions, Vol 7, Iss 1, Pp 1-13 (2015) |
op_relation |
https://www.int-res.com/abstracts/aei/v7/n1/p1-13/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00132 https://doaj.org/article/a31e417f1c424ba7a486cdaea54c5a67 |
op_doi |
https://doi.org/10.3354/aei00132 |
container_title |
Aquaculture Environment Interactions |
container_volume |
7 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
13 |
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1766362289009590272 |