Linking individual migratory behaviour of Atlantic salmon to their genetic origin
Many stocks of fish consist of mixtures of individuals originating from different populations. This is particularly true for many salmon and trout stocks, where fish of different genetic background are being found in the same rivers and/or lakes due to stocking activities or straying caused by incre...
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Food and Agriculture Organization of the United Nations
2005
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ftdtupubl:oai:pure.atira.dk:publications/11e206e2-3b2b-43d7-b92d-a2971480621d 2023-05-15T15:31:49+02:00 Linking individual migratory behaviour of Atlantic salmon to their genetic origin Jepsen, Niels Eg Nielsen, Einar Deacon, M. Spedicato, M.T. Lembo, G. Marmulla, G. 2005 https://orbit.dtu.dk/en/publications/11e206e2-3b2b-43d7-b92d-a2971480621d eng eng Food and Agriculture Organization of the United Nations info:eu-repo/semantics/restrictedAccess Jepsen , N , Eg Nielsen , E & Deacon , M 2005 , Linking individual migratory behaviour of Atlantic salmon to their genetic origin . in M T Spedicato , G Lembo & G Marmulla (eds) , Aquatic telemetry: advances and applications : Proceedings of the Fifth Conference on Fish Telemetry held in Europe . Food and Agriculture Organization of the United Nations , pp. 45-51 , 5th Conference on Fish Telemetry , Ustica , Italy , 09/06/2003 . contributionToPeriodical 2005 ftdtupubl 2022-08-14T07:42:42Z Many stocks of fish consist of mixtures of individuals originating from different populations. This is particularly true for many salmon and trout stocks, where fish of different genetic background are being found in the same rivers and/or lakes due to stocking activities or straying caused by increased aquaculture activities. The interpretation of results from studies of survival and behaviour of fish from such “mixed stocks” require information of the genetic background of individual fish. We used genetic analysis combined with radiotelemetry to study upstream migration of Atlantic salmon (Salmo salar) in a Danish lowland river. The river has a small population of native salmon, but salmon juveniles from Irish, Scottish and Swedish populations have been stocked and return as adults. A total of 39 salmon were caught by electrofishing and tagged by surgical implantation. A tissue sample (fin clip) from each tagged salmon was analysed using microsatellite DNA analysis of 6 loci. Assignment tests were used to infer the population of origin. The results showed that the salmon run was composed of approximately 1/3 “native fish”, 1/3 foreign stocked fish and 1/3 escaped farmed salmon. The results indicate that stocked, foreign salmon had a slightly higher mortality and moved more up and down in the river than the native salmon did, but all salmon had problems passing the physical obstructions in the river. The DNA analyses enabled us to compare the behaviour of fish of different genetic origin, but the interpretation of the results was hampered by a high mortality of tagged fish. This study demonstrates that the combination of recent genetic methods and telemetry provides a potent tool for better management of mixed stock fisheries Other Non-Article Part of Journal/Newspaper Atlantic salmon Salmo salar Technical University of Denmark: DTU Orbit |
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Technical University of Denmark: DTU Orbit |
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English |
description |
Many stocks of fish consist of mixtures of individuals originating from different populations. This is particularly true for many salmon and trout stocks, where fish of different genetic background are being found in the same rivers and/or lakes due to stocking activities or straying caused by increased aquaculture activities. The interpretation of results from studies of survival and behaviour of fish from such “mixed stocks” require information of the genetic background of individual fish. We used genetic analysis combined with radiotelemetry to study upstream migration of Atlantic salmon (Salmo salar) in a Danish lowland river. The river has a small population of native salmon, but salmon juveniles from Irish, Scottish and Swedish populations have been stocked and return as adults. A total of 39 salmon were caught by electrofishing and tagged by surgical implantation. A tissue sample (fin clip) from each tagged salmon was analysed using microsatellite DNA analysis of 6 loci. Assignment tests were used to infer the population of origin. The results showed that the salmon run was composed of approximately 1/3 “native fish”, 1/3 foreign stocked fish and 1/3 escaped farmed salmon. The results indicate that stocked, foreign salmon had a slightly higher mortality and moved more up and down in the river than the native salmon did, but all salmon had problems passing the physical obstructions in the river. The DNA analyses enabled us to compare the behaviour of fish of different genetic origin, but the interpretation of the results was hampered by a high mortality of tagged fish. This study demonstrates that the combination of recent genetic methods and telemetry provides a potent tool for better management of mixed stock fisheries |
author2 |
Spedicato, M.T. Lembo, G. Marmulla, G. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Jepsen, Niels Eg Nielsen, Einar Deacon, M. |
spellingShingle |
Jepsen, Niels Eg Nielsen, Einar Deacon, M. Linking individual migratory behaviour of Atlantic salmon to their genetic origin |
author_facet |
Jepsen, Niels Eg Nielsen, Einar Deacon, M. |
author_sort |
Jepsen, Niels |
title |
Linking individual migratory behaviour of Atlantic salmon to their genetic origin |
title_short |
Linking individual migratory behaviour of Atlantic salmon to their genetic origin |
title_full |
Linking individual migratory behaviour of Atlantic salmon to their genetic origin |
title_fullStr |
Linking individual migratory behaviour of Atlantic salmon to their genetic origin |
title_full_unstemmed |
Linking individual migratory behaviour of Atlantic salmon to their genetic origin |
title_sort |
linking individual migratory behaviour of atlantic salmon to their genetic origin |
publisher |
Food and Agriculture Organization of the United Nations |
publishDate |
2005 |
url |
https://orbit.dtu.dk/en/publications/11e206e2-3b2b-43d7-b92d-a2971480621d |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Jepsen , N , Eg Nielsen , E & Deacon , M 2005 , Linking individual migratory behaviour of Atlantic salmon to their genetic origin . in M T Spedicato , G Lembo & G Marmulla (eds) , Aquatic telemetry: advances and applications : Proceedings of the Fifth Conference on Fish Telemetry held in Europe . Food and Agriculture Organization of the United Nations , pp. 45-51 , 5th Conference on Fish Telemetry , Ustica , Italy , 09/06/2003 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766362329381863424 |