Habitat features mediate selective consumption of salmon by bears
Salmon provide a key source of marine-derived nutrients to aquatic and surrounding terrestrial habitats in coastal areas of the North Pacific. Bears are a major predator of salmon and provide an important pathway for carcass transfer to riparian zones. We studied selective consumption of salmon (Onc...
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ftunivtoronto:oai:localhost:1807/81400 2023-05-15T18:42:09+02:00 Habitat features mediate selective consumption of salmon by bears Andersson, Luke C. Reynolds, John D. 2017-07-28 http://hdl.handle.net/1807/81400 http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2017-0055 unknown NRC Research Press (a division of Canadian Science Publishing) 0706-652X http://hdl.handle.net/1807/81400 http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2017-0055 Article 2017 ftunivtoronto 2020-06-17T12:09:15Z Salmon provide a key source of marine-derived nutrients to aquatic and surrounding terrestrial habitats in coastal areas of the North Pacific. Bears are a major predator of salmon and provide an important pathway for carcass transfer to riparian zones. We studied selective consumption of salmon (Oncorhynchus keta and O. gorbuscha) by bears (Ursus arctos and U. americanus) on 12 streams on the central coast of British Columbia, Canada. We predicted bears would select more energy-rich parts, and eat less of each fish (i.e., selective consumption), in streams with more prey and simpler habitat (i.e., streams that facilitate salmon capture). Bears were 12% more likely to consume fish selectively in narrow, shallow streams with less pool volume, where salmon are easier to catch, than in deep, wide streams. However, bears were also 21% more likely to selectively consume fish in streams with more wood obstacles and undercut banks, where hunting was predicted to be more difficult. This suggests that stream characteristics can have significant indirect effects on riparian nutrient subsidies to ecosystems through selective feeding by bears. The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author. Article in Journal/Newspaper Ursus arctos University of Toronto: Research Repository T-Space British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Pacific |
institution |
Open Polar |
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University of Toronto: Research Repository T-Space |
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ftunivtoronto |
language |
unknown |
description |
Salmon provide a key source of marine-derived nutrients to aquatic and surrounding terrestrial habitats in coastal areas of the North Pacific. Bears are a major predator of salmon and provide an important pathway for carcass transfer to riparian zones. We studied selective consumption of salmon (Oncorhynchus keta and O. gorbuscha) by bears (Ursus arctos and U. americanus) on 12 streams on the central coast of British Columbia, Canada. We predicted bears would select more energy-rich parts, and eat less of each fish (i.e., selective consumption), in streams with more prey and simpler habitat (i.e., streams that facilitate salmon capture). Bears were 12% more likely to consume fish selectively in narrow, shallow streams with less pool volume, where salmon are easier to catch, than in deep, wide streams. However, bears were also 21% more likely to selectively consume fish in streams with more wood obstacles and undercut banks, where hunting was predicted to be more difficult. This suggests that stream characteristics can have significant indirect effects on riparian nutrient subsidies to ecosystems through selective feeding by bears. The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author. |
format |
Article in Journal/Newspaper |
author |
Andersson, Luke C. Reynolds, John D. |
spellingShingle |
Andersson, Luke C. Reynolds, John D. Habitat features mediate selective consumption of salmon by bears |
author_facet |
Andersson, Luke C. Reynolds, John D. |
author_sort |
Andersson, Luke C. |
title |
Habitat features mediate selective consumption of salmon by bears |
title_short |
Habitat features mediate selective consumption of salmon by bears |
title_full |
Habitat features mediate selective consumption of salmon by bears |
title_fullStr |
Habitat features mediate selective consumption of salmon by bears |
title_full_unstemmed |
Habitat features mediate selective consumption of salmon by bears |
title_sort |
habitat features mediate selective consumption of salmon by bears |
publisher |
NRC Research Press (a division of Canadian Science Publishing) |
publishDate |
2017 |
url |
http://hdl.handle.net/1807/81400 http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2017-0055 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-19.455,-19.455,65.656,65.656) |
geographic |
British Columbia Canada Keta Pacific |
geographic_facet |
British Columbia Canada Keta Pacific |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_relation |
0706-652X http://hdl.handle.net/1807/81400 http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2017-0055 |
_version_ |
1766231771214512128 |