Area use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river

We compared the within-river movements and distribution of wild and escaped farmed Atlantic salmon Salmo salar before and during spawning in the Namsen river system of Central Norway. A total of 74 wild and 43 escaped farmed salmon were captured at sea, tagged with radio transmitters and released. B...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	K Moe, TF Næsje, TO Haugen, EM Ulvan, T Aronsen, T Sandnes, EB Thorstad
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2016
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/367e8a82a04b4c2aa5726d3eec49568f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:367e8a82a04b4c2aa5726d3eec49568f
record_format	dspace
spelling	oai:doaj.org-article:367e8a82a04b4c2aa5726d3eec49568f2021-11-04T10:28:43ZArea use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river1869-215X1869-753410.3354/aei00165https://doaj.org/article/367e8a82a04b4c2aa5726d3eec49568f2016-02-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v8/p77-88/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534We compared the within-river movements and distribution of wild and escaped farmed Atlantic salmon Salmo salar before and during spawning in the Namsen river system of Central Norway. A total of 74 wild and 43 escaped farmed salmon were captured at sea, tagged with radio transmitters and released. Based on our examinations, most, if not all salmon (farmed and wild) entering the River Namsen were sexually mature. Farmed salmon entering the river system had a higher probability than wild individuals of reaching the migration barrier in the upper part of the river, 70 km from the sea. During the pre-spawning and spawning periods, farmed salmon were located mainly in the upper parts (50 to 70 km from the sea), whereas wild salmon were evenly distributed along the entire river during both periods. Consequently, the probability of farmed × wild inter-breeding varied among river sections. Our finding that the distribution of escaped farmed salmon may differ from that of wild salmon and among river sections in the pre-spawning and spawning periods—and that it may also vary over time—must be taken into consideration when (1) designing monitoring programs aimed at estimating the proportion of escaped farmed salmon in rivers and (2) when interpreting monitoring results. Furthermore, targeted fishing in the river aimed at reducing the number of farmed salmon prior to spawning may be more effective in upper rivers sections, and below major migration barriers.K MoeTF NæsjeTO HaugenEM UlvanT AronsenT SandnesEB ThorstadInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 8, Pp 77-88 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
spellingShingle	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 K Moe TF Næsje TO Haugen EM Ulvan T Aronsen T Sandnes EB Thorstad Area use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river
description	We compared the within-river movements and distribution of wild and escaped farmed Atlantic salmon Salmo salar before and during spawning in the Namsen river system of Central Norway. A total of 74 wild and 43 escaped farmed salmon were captured at sea, tagged with radio transmitters and released. Based on our examinations, most, if not all salmon (farmed and wild) entering the River Namsen were sexually mature. Farmed salmon entering the river system had a higher probability than wild individuals of reaching the migration barrier in the upper part of the river, 70 km from the sea. During the pre-spawning and spawning periods, farmed salmon were located mainly in the upper parts (50 to 70 km from the sea), whereas wild salmon were evenly distributed along the entire river during both periods. Consequently, the probability of farmed × wild inter-breeding varied among river sections. Our finding that the distribution of escaped farmed salmon may differ from that of wild salmon and among river sections in the pre-spawning and spawning periods—and that it may also vary over time—must be taken into consideration when (1) designing monitoring programs aimed at estimating the proportion of escaped farmed salmon in rivers and (2) when interpreting monitoring results. Furthermore, targeted fishing in the river aimed at reducing the number of farmed salmon prior to spawning may be more effective in upper rivers sections, and below major migration barriers.
format	article
author	K Moe TF Næsje TO Haugen EM Ulvan T Aronsen T Sandnes EB Thorstad
author_facet	K Moe TF Næsje TO Haugen EM Ulvan T Aronsen T Sandnes EB Thorstad
author_sort	K Moe
title	Area use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river
title_short	Area use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river
title_full	Area use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river
title_fullStr	Area use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river
title_full_unstemmed	Area use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river
title_sort	area use and movement patterns of wild and escaped farmed atlantic salmon before and during spawning in a large norwegian river
publisher	Inter-Research
publishDate	2016
url	https://doaj.org/article/367e8a82a04b4c2aa5726d3eec49568f
work_keys_str_mv	AT kmoe areauseandmovementpatternsofwildandescapedfarmedatlanticsalmonbeforeandduringspawninginalargenorwegianriver AT tfnæsje areauseandmovementpatternsofwildandescapedfarmedatlanticsalmonbeforeandduringspawninginalargenorwegianriver AT tohaugen areauseandmovementpatternsofwildandescapedfarmedatlanticsalmonbeforeandduringspawninginalargenorwegianriver AT emulvan areauseandmovementpatternsofwildandescapedfarmedatlanticsalmonbeforeandduringspawninginalargenorwegianriver AT taronsen areauseandmovementpatternsofwildandescapedfarmedatlanticsalmonbeforeandduringspawninginalargenorwegianriver AT tsandnes areauseandmovementpatternsofwildandescapedfarmedatlanticsalmonbeforeandduringspawninginalargenorwegianriver AT ebthorstad areauseandmovementpatternsofwildandescapedfarmedatlanticsalmonbeforeandduringspawninginalargenorwegianriver
_version_	1718444891403452416

Area use and movement patterns of wild and escaped farmed Atlantic salmon before and during spawning in a large Norwegian river

Ejemplares similares