Living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile Atlantic salmon
Stream-dwelling, juvenile Atlantic salmon, Salmo salar L., feed mainly on drifting invertebrates, usually by swimming upstream from a stationary position to intercept individual prey items. Laboratory experiments tested the prediction that individual salmon should reduce the distance over which they...
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1989
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Online Access: | https://ir.library.carleton.ca/pub/11449 https://doi.org/10.1016/0003-3472(89)90139-5 |
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ftcarletonunivir:oai:carleton.ca:11449 2023-05-15T15:31:08+02:00 Living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile Atlantic salmon Godin, J.-G.J. (Jean-Guy J.) Rangeley, R.W. (Robert W.) 1989-01-01 https://ir.library.carleton.ca/pub/11449 https://doi.org/10.1016/0003-3472(89)90139-5 en eng https://ir.library.carleton.ca/pub/11449 doi:10.1016/0003-3472(89)90139-5 Animal Behaviour vol. 37 no. PART 6, pp. 943-954 info:eu-repo/semantics/article 1989 ftcarletonunivir https://doi.org/10.1016/0003-3472(89)90139-5 2022-02-06T21:50:22Z Stream-dwelling, juvenile Atlantic salmon, Salmo salar L., feed mainly on drifting invertebrates, usually by swimming upstream from a stationary position to intercept individual prey items. Laboratory experiments tested the prediction that individual salmon should reduce the distance over which they would travel (attack distance) to intercept drifting food items as the energy cost of swimming increases with increasing current velocity. Attack distance varied inversely with current velocity as expected. The fish's average speed of upstream movement relative to the substrate remained constant and the duration of individual attacks therefore declined as current velocity increased. Calculated reaction distances and a second ecperiment using tethered prey drifting at speeds independent of current velocity confirmed that these relationships were due to fish actually delaying attacks on perceived prey for longer periods as current velocity increased. Using estimated metabolic rates for burst swimming, it appears that energy expenditure per attack varies little with current velocity. Therefore, by reducing their reaction and attack distances in response to increasing current velocity, the fish reduced their energy cost of travel per attack. Article in Journal/Newspaper Atlantic salmon Salmo salar Carleton University's Institutional Repository Animal Behaviour 37 943 954 |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
description |
Stream-dwelling, juvenile Atlantic salmon, Salmo salar L., feed mainly on drifting invertebrates, usually by swimming upstream from a stationary position to intercept individual prey items. Laboratory experiments tested the prediction that individual salmon should reduce the distance over which they would travel (attack distance) to intercept drifting food items as the energy cost of swimming increases with increasing current velocity. Attack distance varied inversely with current velocity as expected. The fish's average speed of upstream movement relative to the substrate remained constant and the duration of individual attacks therefore declined as current velocity increased. Calculated reaction distances and a second ecperiment using tethered prey drifting at speeds independent of current velocity confirmed that these relationships were due to fish actually delaying attacks on perceived prey for longer periods as current velocity increased. Using estimated metabolic rates for burst swimming, it appears that energy expenditure per attack varies little with current velocity. Therefore, by reducing their reaction and attack distances in response to increasing current velocity, the fish reduced their energy cost of travel per attack. |
format |
Article in Journal/Newspaper |
author |
Godin, J.-G.J. (Jean-Guy J.) Rangeley, R.W. (Robert W.) |
spellingShingle |
Godin, J.-G.J. (Jean-Guy J.) Rangeley, R.W. (Robert W.) Living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile Atlantic salmon |
author_facet |
Godin, J.-G.J. (Jean-Guy J.) Rangeley, R.W. (Robert W.) |
author_sort |
Godin, J.-G.J. (Jean-Guy J.) |
title |
Living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile Atlantic salmon |
title_short |
Living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile Atlantic salmon |
title_full |
Living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile Atlantic salmon |
title_fullStr |
Living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile Atlantic salmon |
title_full_unstemmed |
Living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile Atlantic salmon |
title_sort |
living in the fast lane: effects of cost of locomotion on foraging behaviour in juvenile atlantic salmon |
publishDate |
1989 |
url |
https://ir.library.carleton.ca/pub/11449 https://doi.org/10.1016/0003-3472(89)90139-5 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Animal Behaviour vol. 37 no. PART 6, pp. 943-954 |
op_relation |
https://ir.library.carleton.ca/pub/11449 doi:10.1016/0003-3472(89)90139-5 |
op_doi |
https://doi.org/10.1016/0003-3472(89)90139-5 |
container_title |
Animal Behaviour |
container_volume |
37 |
container_start_page |
943 |
op_container_end_page |
954 |
_version_ |
1766361636382179328 |