Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon
Competition for limited resources and the resulting density-dependent processes are key factors in driving stream salmonid population dynamics. Here we test for the combined effects of density and shelter availability on the movement of juvenile Atlantic salmon in a Norwegian river. Individually mar...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Online Access: | http://hdl.handle.net/11250/2457662 https://doi.org/10.1139/cjfas-2016-0047 |
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ftninstnf:oai:brage.nina.no:11250/2457662 2023-05-15T15:31:18+02:00 Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon Teichert, Maxim Foldvik, Anders Einum, Sigurd Finstad, Anders Gravbrøt Forseth, Torbjørn Ugedal, Ola Norway 2017 application/pdf http://hdl.handle.net/11250/2457662 https://doi.org/10.1139/cjfas-2016-0047 eng eng Norges forskningsråd: 201779 Norges forskningsråd: RENERGI Norges forskningsråd: 193818 urn:issn:0706-652X http://hdl.handle.net/11250/2457662 https://doi.org/10.1139/cjfas-2016-0047 cristin:1455614 Canadian Journal of Fisheries and Aquatic Sciences VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2017 ftninstnf https://doi.org/10.1139/cjfas-2016-0047 2021-12-23T07:16:44Z Competition for limited resources and the resulting density-dependent processes are key factors in driving stream salmonid population dynamics. Here we test for the combined effects of density and shelter availability on the movement of juvenile Atlantic salmon in a Norwegian river. Individually marked, hatchery reared salmon juveniles were released at 26 sites along a 2.5 km long stretch and recaptured after 12 months. The spatial variation in shelter availability and density of salmonids was quantified prior to the release. We found no effect of released fish number on the number of marked salmon moving more than 12.5 – 112.5 m away from their release site. However, the ratio of pre-experiment fish density per shelter was positively related to the number of movers. Thus, fish that were released at sites where the amount of shelter was low relative to the density of the pre-experiment population were more likely to move. These results support the prediction from smaller scale experimental studies that shelter availability may act to determine local carrying capacity in stream living salmonid populations. acceptedVersion Article in Journal/Newspaper Atlantic salmon Norwegian Institute for Nature Research: Brage NINA Norway Canadian Journal of Fisheries and Aquatic Sciences 74 12 2153 2160 |
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Open Polar |
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Norwegian Institute for Nature Research: Brage NINA |
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ftninstnf |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
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VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Teichert, Maxim Foldvik, Anders Einum, Sigurd Finstad, Anders Gravbrøt Forseth, Torbjørn Ugedal, Ola Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
Competition for limited resources and the resulting density-dependent processes are key factors in driving stream salmonid population dynamics. Here we test for the combined effects of density and shelter availability on the movement of juvenile Atlantic salmon in a Norwegian river. Individually marked, hatchery reared salmon juveniles were released at 26 sites along a 2.5 km long stretch and recaptured after 12 months. The spatial variation in shelter availability and density of salmonids was quantified prior to the release. We found no effect of released fish number on the number of marked salmon moving more than 12.5 – 112.5 m away from their release site. However, the ratio of pre-experiment fish density per shelter was positively related to the number of movers. Thus, fish that were released at sites where the amount of shelter was low relative to the density of the pre-experiment population were more likely to move. These results support the prediction from smaller scale experimental studies that shelter availability may act to determine local carrying capacity in stream living salmonid populations. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Teichert, Maxim Foldvik, Anders Einum, Sigurd Finstad, Anders Gravbrøt Forseth, Torbjørn Ugedal, Ola |
author_facet |
Teichert, Maxim Foldvik, Anders Einum, Sigurd Finstad, Anders Gravbrøt Forseth, Torbjørn Ugedal, Ola |
author_sort |
Teichert, Maxim |
title |
Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon |
title_short |
Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon |
title_full |
Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon |
title_fullStr |
Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon |
title_full_unstemmed |
Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon |
title_sort |
interactions between local population density and limited habitat resources determine movements of juvenile atlantic salmon |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2457662 https://doi.org/10.1139/cjfas-2016-0047 |
op_coverage |
Norway |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences |
op_relation |
Norges forskningsråd: 201779 Norges forskningsråd: RENERGI Norges forskningsråd: 193818 urn:issn:0706-652X http://hdl.handle.net/11250/2457662 https://doi.org/10.1139/cjfas-2016-0047 cristin:1455614 |
op_doi |
https://doi.org/10.1139/cjfas-2016-0047 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
74 |
container_issue |
12 |
container_start_page |
2153 |
op_container_end_page |
2160 |
_version_ |
1766361800500051968 |