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 (Salmo salar) in a Norwegian river. In...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/cjfas-2016-0047 2024-06-23T07:51:17+00:00 Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon Teichert, Maxim A.K. Foldvik, Anders Einum, Sigurd Finstad, Anders G. Forseth, Torbjørn Ugedal, Ola 2017 http://dx.doi.org/10.1139/cjfas-2016-0047 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0047 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0047 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 74, issue 12, page 2153-2160 ISSN 0706-652X 1205-7533 journal-article 2017 crcansciencepubl https://doi.org/10.1139/cjfas-2016-0047 2024-05-24T13:05:52Z 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 (Salmo salar) 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. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 74 12 2153 2160 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
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 (Salmo salar) 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. |
format |
Article in Journal/Newspaper |
author |
Teichert, Maxim A.K. Foldvik, Anders Einum, Sigurd Finstad, Anders G. Forseth, Torbjørn Ugedal, Ola |
spellingShingle |
Teichert, Maxim A.K. Foldvik, Anders Einum, Sigurd Finstad, Anders G. Forseth, Torbjørn Ugedal, Ola Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon |
author_facet |
Teichert, Maxim A.K. Foldvik, Anders Einum, Sigurd Finstad, Anders G. Forseth, Torbjørn Ugedal, Ola |
author_sort |
Teichert, Maxim A.K. |
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 |
publisher |
Canadian Science Publishing |
publishDate |
2017 |
url |
http://dx.doi.org/10.1139/cjfas-2016-0047 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2016-0047 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2016-0047 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 74, issue 12, page 2153-2160 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
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_ |
1802642330681868288 |