Spatial and temporal effects of interspecific competition between Atlantic salmon ( Salmo salar ) and brown trout ( Salmo trutta ) in winter
Previous work has shown that juvenile stream-dwelling salmonids become predominantly nocturnal during winter by emerging from daytime refuges to feed, with several species having been shown to prefer slow-flowing water while active at night. We used seminatural stream channels, landscaped to provide...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2001
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Online Access: | http://dx.doi.org/10.1139/f01-061 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-061 |
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crcansciencepubl:10.1139/f01-061 2024-04-07T07:50:56+00:00 Spatial and temporal effects of interspecific competition between Atlantic salmon ( Salmo salar ) and brown trout ( Salmo trutta ) in winter Harwood, A J Metcalfe, N B Armstrong, J D Griffiths, S W 2001 http://dx.doi.org/10.1139/f01-061 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-061 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 58, issue 6, page 1133-1140 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2001 crcansciencepubl https://doi.org/10.1139/f01-061 2024-03-08T00:37:49Z Previous work has shown that juvenile stream-dwelling salmonids become predominantly nocturnal during winter by emerging from daytime refuges to feed, with several species having been shown to prefer slow-flowing water while active at night. We used seminatural stream channels, landscaped to provide a choice of water depths, and hence velocities, to test whether Atlantic salmon, Salmo salar, and brown trout, Salmo trutta, show similar habitat preferences during winter. We also tested whether there was any spatial or temporal displacement of Atlantic salmon when in sympatry with brown trout. Nighttime observations revealed that Atlantic salmon did have a preference for slow-flowing water. However, when in direct competition with trout, salmon either remained predominantly nocturnal but occupied shallower water, or became significantly less nocturnal, spending more time active during the day than when in allopatry. These results, which were especially marked in relatively larger fish, indicate that competition between the two species for food and resources is not restricted to the summer months and may affect both the short- and long-term growth and survival of overwintering wild Atlantic salmon. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 58 6 1133 1140 |
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Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Harwood, A J Metcalfe, N B Armstrong, J D Griffiths, S W Spatial and temporal effects of interspecific competition between Atlantic salmon ( Salmo salar ) and brown trout ( Salmo trutta ) in winter |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Previous work has shown that juvenile stream-dwelling salmonids become predominantly nocturnal during winter by emerging from daytime refuges to feed, with several species having been shown to prefer slow-flowing water while active at night. We used seminatural stream channels, landscaped to provide a choice of water depths, and hence velocities, to test whether Atlantic salmon, Salmo salar, and brown trout, Salmo trutta, show similar habitat preferences during winter. We also tested whether there was any spatial or temporal displacement of Atlantic salmon when in sympatry with brown trout. Nighttime observations revealed that Atlantic salmon did have a preference for slow-flowing water. However, when in direct competition with trout, salmon either remained predominantly nocturnal but occupied shallower water, or became significantly less nocturnal, spending more time active during the day than when in allopatry. These results, which were especially marked in relatively larger fish, indicate that competition between the two species for food and resources is not restricted to the summer months and may affect both the short- and long-term growth and survival of overwintering wild Atlantic salmon. |
format |
Article in Journal/Newspaper |
author |
Harwood, A J Metcalfe, N B Armstrong, J D Griffiths, S W |
author_facet |
Harwood, A J Metcalfe, N B Armstrong, J D Griffiths, S W |
author_sort |
Harwood, A J |
title |
Spatial and temporal effects of interspecific competition between Atlantic salmon ( Salmo salar ) and brown trout ( Salmo trutta ) in winter |
title_short |
Spatial and temporal effects of interspecific competition between Atlantic salmon ( Salmo salar ) and brown trout ( Salmo trutta ) in winter |
title_full |
Spatial and temporal effects of interspecific competition between Atlantic salmon ( Salmo salar ) and brown trout ( Salmo trutta ) in winter |
title_fullStr |
Spatial and temporal effects of interspecific competition between Atlantic salmon ( Salmo salar ) and brown trout ( Salmo trutta ) in winter |
title_full_unstemmed |
Spatial and temporal effects of interspecific competition between Atlantic salmon ( Salmo salar ) and brown trout ( Salmo trutta ) in winter |
title_sort |
spatial and temporal effects of interspecific competition between atlantic salmon ( salmo salar ) and brown trout ( salmo trutta ) in winter |
publisher |
Canadian Science Publishing |
publishDate |
2001 |
url |
http://dx.doi.org/10.1139/f01-061 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-061 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 58, issue 6, page 1133-1140 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f01-061 |
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Canadian Journal of Fisheries and Aquatic Sciences |
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58 |
container_issue |
6 |
container_start_page |
1133 |
op_container_end_page |
1140 |
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1795665753856278528 |