Using movement behaviour to define biological seasons for woodland caribou
Terrestrial mammals are strongly influenced by seasonal changes in environmental conditions. Studies of animal space use behaviour are therefore inherently seasonal in nature. We propose an individual-based quantitative method for identifying seasonal shifts in caribou movement behaviour and we demo...
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Septentrio Academic Publishing
2012
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/2277 2023-05-15T15:53:30+02:00 Using movement behaviour to define biological seasons for woodland caribou Rudolph, Tyler D. Drapeau, Pierre 2012-03-08 application/pdf https://septentrio.uit.no/index.php/rangifer/article/view/2277 https://doi.org/10.7557/2.32.2.2277 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/2277/2118 https://septentrio.uit.no/index.php/rangifer/article/view/2277 doi:10.7557/2.32.2.2277 Copyright (c) 2015 Tyler D. Rudolph, Pierre Drapeau http://creativecommons.org/licenses/by/3.0/ CC-BY Rangifer; Vol 32 (2012): Special Issue No. 20; 295-307 1890-6729 biological inference quantitative methods seasonal onset behaviour temporal variation woodland caribou info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2012 ftunitroemsoe https://doi.org/10.7557/2.32.2.2277 2021-08-16T15:12:39Z Terrestrial mammals are strongly influenced by seasonal changes in environmental conditions. Studies of animal space use behaviour are therefore inherently seasonal in nature. We propose an individual-based quantitative method for identifying seasonal shifts in caribou movement behaviour and we demonstrate its use in determining the onset of the winter, spring dispersal, and calving seasons. Using pooled data for the population we demonstrate an alternate approach using polynomial regression with mixed effects. We then compare individual onset dates with population-based estimates and those adopted by expert consensus for our study area. Distributions of individual-based onset dates were normally distributed with prominent modes; however, there was considerable variation in individual onset times. Population-based estimates were closer to the peaks of individual estimates than were expert-based estimates, which fell outside the onetailed 90% and 95% sample quantiles of individually-fitted distributions for spring and winter, respectively. Both expertand population-based estimates were later for winter and earlier for both spring and calving than were individual-based estimates. We discuss the potential consequences of neglecting to corroborate conventionally used dates with observed seasonal trends in movement behaviour. In closing, we recommend researchers adopt an individual-based quantitative approach and a variable temporal window for data set extraction. Article in Journal/Newspaper caribou Rangifer University of Tromsø: Septentrio Academic Publishing Rangifer 32 2 295 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
biological inference quantitative methods seasonal onset behaviour temporal variation woodland caribou |
spellingShingle |
biological inference quantitative methods seasonal onset behaviour temporal variation woodland caribou Rudolph, Tyler D. Drapeau, Pierre Using movement behaviour to define biological seasons for woodland caribou |
topic_facet |
biological inference quantitative methods seasonal onset behaviour temporal variation woodland caribou |
description |
Terrestrial mammals are strongly influenced by seasonal changes in environmental conditions. Studies of animal space use behaviour are therefore inherently seasonal in nature. We propose an individual-based quantitative method for identifying seasonal shifts in caribou movement behaviour and we demonstrate its use in determining the onset of the winter, spring dispersal, and calving seasons. Using pooled data for the population we demonstrate an alternate approach using polynomial regression with mixed effects. We then compare individual onset dates with population-based estimates and those adopted by expert consensus for our study area. Distributions of individual-based onset dates were normally distributed with prominent modes; however, there was considerable variation in individual onset times. Population-based estimates were closer to the peaks of individual estimates than were expert-based estimates, which fell outside the onetailed 90% and 95% sample quantiles of individually-fitted distributions for spring and winter, respectively. Both expertand population-based estimates were later for winter and earlier for both spring and calving than were individual-based estimates. We discuss the potential consequences of neglecting to corroborate conventionally used dates with observed seasonal trends in movement behaviour. In closing, we recommend researchers adopt an individual-based quantitative approach and a variable temporal window for data set extraction. |
format |
Article in Journal/Newspaper |
author |
Rudolph, Tyler D. Drapeau, Pierre |
author_facet |
Rudolph, Tyler D. Drapeau, Pierre |
author_sort |
Rudolph, Tyler D. |
title |
Using movement behaviour to define biological seasons for woodland caribou |
title_short |
Using movement behaviour to define biological seasons for woodland caribou |
title_full |
Using movement behaviour to define biological seasons for woodland caribou |
title_fullStr |
Using movement behaviour to define biological seasons for woodland caribou |
title_full_unstemmed |
Using movement behaviour to define biological seasons for woodland caribou |
title_sort |
using movement behaviour to define biological seasons for woodland caribou |
publisher |
Septentrio Academic Publishing |
publishDate |
2012 |
url |
https://septentrio.uit.no/index.php/rangifer/article/view/2277 https://doi.org/10.7557/2.32.2.2277 |
genre |
caribou Rangifer |
genre_facet |
caribou Rangifer |
op_source |
Rangifer; Vol 32 (2012): Special Issue No. 20; 295-307 1890-6729 |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/2277/2118 https://septentrio.uit.no/index.php/rangifer/article/view/2277 doi:10.7557/2.32.2.2277 |
op_rights |
Copyright (c) 2015 Tyler D. Rudolph, Pierre Drapeau http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/2.32.2.2277 |
container_title |
Rangifer |
container_volume |
32 |
container_issue |
2 |
container_start_page |
295 |
_version_ |
1766388610466054144 |