Unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability
Habitat selection is a multi‐level, hierarchical process that should be a key component in the balance between food acquisition and predation risk avoidance (food–predation trade‐off). However, to date, studies have not fully elucidated how fine‐ and broad‐scale habitat decisions by individual prey...
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crwiley:10.1111/ecog.01305 2024-10-13T14:06:35+00:00 Unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability Bastille‐Rousseau, Guillaume Potts, Jonathan R. Schaefer, James A. Lewis, Mark A. Ellington, E. Hance Rayl, Nathaniel D. Mahoney, Shane P. Murray, Dennis L. Safari Club International Foundation 2015 http://dx.doi.org/10.1111/ecog.01305 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fecog.01305 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ecog.01305 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecography volume 38, issue 10, page 1049-1059 ISSN 0906-7590 1600-0587 journal-article 2015 crwiley https://doi.org/10.1111/ecog.01305 2024-09-23T04:34:30Z Habitat selection is a multi‐level, hierarchical process that should be a key component in the balance between food acquisition and predation risk avoidance (food–predation trade‐off). However, to date, studies have not fully elucidated how fine‐ and broad‐scale habitat decisions by individual prey can help balance food versus risk. We studied broad‐scale habitat selection by Newfoundland caribou Rangifer tarandus , focusing on trade‐offs between predation risk versus access to forage during the calving and post‐calving period. We improved traditional measures of habitat availability by incorporating fine‐scale movement patterns of caribou into the availability kernel, thus enabling separation of broad and fine scales of selection. Remote sensing and field surveys served to create a spatio‐temporal model of forage availability, whereas GPS telemetry locations from 66 black bears Ursus americanus and 59 coyotes Canis latrans provided models of predation risk. We then used GPS telemetry locations from 114 female caribou to assess food–predation trade‐offs through the prism of our refined model of caribou habitat availability. We noted that migratory movements of caribou were oriented mainly towards habitats with abundant forage and lower risk of bear and (to a lesser extent) coyote encounter. These findings were generally consistent across caribou herds and would not have been evident had we used traditional methods instead of our refined model when estimating habitat availability. We interpret these findings in the context of stereotypical migratory behaviour observed in Newfoundland caribou, which occurs despite the extirpation of wolves Canis lupus nearly a century ago. We submit that caribou are able to balance food acquisition against predation risk using a complex set of factors involving both finer and broader scale selection. Accordingly, our study provides a strong argument for using refined habitat availability estimates when assessing food–predation trade‐offs. Article in Journal/Newspaper Canis lupus Newfoundland Rangifer tarandus Wiley Online Library Ecography 38 10 1049 1059 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Habitat selection is a multi‐level, hierarchical process that should be a key component in the balance between food acquisition and predation risk avoidance (food–predation trade‐off). However, to date, studies have not fully elucidated how fine‐ and broad‐scale habitat decisions by individual prey can help balance food versus risk. We studied broad‐scale habitat selection by Newfoundland caribou Rangifer tarandus , focusing on trade‐offs between predation risk versus access to forage during the calving and post‐calving period. We improved traditional measures of habitat availability by incorporating fine‐scale movement patterns of caribou into the availability kernel, thus enabling separation of broad and fine scales of selection. Remote sensing and field surveys served to create a spatio‐temporal model of forage availability, whereas GPS telemetry locations from 66 black bears Ursus americanus and 59 coyotes Canis latrans provided models of predation risk. We then used GPS telemetry locations from 114 female caribou to assess food–predation trade‐offs through the prism of our refined model of caribou habitat availability. We noted that migratory movements of caribou were oriented mainly towards habitats with abundant forage and lower risk of bear and (to a lesser extent) coyote encounter. These findings were generally consistent across caribou herds and would not have been evident had we used traditional methods instead of our refined model when estimating habitat availability. We interpret these findings in the context of stereotypical migratory behaviour observed in Newfoundland caribou, which occurs despite the extirpation of wolves Canis lupus nearly a century ago. We submit that caribou are able to balance food acquisition against predation risk using a complex set of factors involving both finer and broader scale selection. Accordingly, our study provides a strong argument for using refined habitat availability estimates when assessing food–predation trade‐offs. |
author2 |
Safari Club International Foundation |
format |
Article in Journal/Newspaper |
author |
Bastille‐Rousseau, Guillaume Potts, Jonathan R. Schaefer, James A. Lewis, Mark A. Ellington, E. Hance Rayl, Nathaniel D. Mahoney, Shane P. Murray, Dennis L. |
spellingShingle |
Bastille‐Rousseau, Guillaume Potts, Jonathan R. Schaefer, James A. Lewis, Mark A. Ellington, E. Hance Rayl, Nathaniel D. Mahoney, Shane P. Murray, Dennis L. Unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability |
author_facet |
Bastille‐Rousseau, Guillaume Potts, Jonathan R. Schaefer, James A. Lewis, Mark A. Ellington, E. Hance Rayl, Nathaniel D. Mahoney, Shane P. Murray, Dennis L. |
author_sort |
Bastille‐Rousseau, Guillaume |
title |
Unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability |
title_short |
Unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability |
title_full |
Unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability |
title_fullStr |
Unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability |
title_full_unstemmed |
Unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability |
title_sort |
unveiling trade‐offs in resource selection of migratory caribou using a mechanistic movement model of availability |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1111/ecog.01305 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fecog.01305 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ecog.01305 |
genre |
Canis lupus Newfoundland Rangifer tarandus |
genre_facet |
Canis lupus Newfoundland Rangifer tarandus |
op_source |
Ecography volume 38, issue 10, page 1049-1059 ISSN 0906-7590 1600-0587 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ecog.01305 |
container_title |
Ecography |
container_volume |
38 |
container_issue |
10 |
container_start_page |
1049 |
op_container_end_page |
1059 |
_version_ |
1812812776414904320 |