Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying
Data on the activity pattern, proportion of time spent lying and the length of active and lying periods in winter are presented from a 3 year study on the Porcupine caribou herd. Animals were most active at sunrise and sunset resulting in from one (late fall, early and mid winter) to two (early fall...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Septentrio Academic Publishing
1986
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Online Access: | https://septentrio.uit.no/index.php/rangifer/article/view/656 https://doi.org/10.7557/2.6.2.656 |
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/656 2023-05-15T18:03:55+02:00 Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying Russell, D. E. Martell, A. M. 1986-06-01 application/pdf https://septentrio.uit.no/index.php/rangifer/article/view/656 https://doi.org/10.7557/2.6.2.656 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/656/623 https://septentrio.uit.no/index.php/rangifer/article/view/656 doi:10.7557/2.6.2.656 Copyright (c) 2015 D. E. Russell, A. M. Martell http://creativecommons.org/licenses/by/3.0/ CC-BY Rangifer; Vol 6 (1986): Special Issue No. 1; 253-259 1890-6729 caribou Rangifer tarandus activity winter range day length lying period info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1986 ftunitroemsoe https://doi.org/10.7557/2.6.2.656 2021-08-16T14:33:37Z Data on the activity pattern, proportion of time spent lying and the length of active and lying periods in winter are presented from a 3 year study on the Porcupine caribou herd. Animals were most active at sunrise and sunset resulting in from one (late fall, early and mid winter) to two (early fall and late winter) to three (spring) intervening lying periods. Mean active/lying cycle length decreased from late fall (298 mm) to early winter (238 min), increased to a peak in mid winter (340 min) then declined in late winter (305 min) and again in spring (240 min). Mean length of the lying period increased throughout the 3 winter months from 56 min m early winter to 114 min in mid winter and 153 min in late winter. The percent of the day animals spent lying decreased from fall to early winter, increased throughout the winter and declined in spring. This pattern was related, in part, to day length and was used to compare percent lying among herds. The relationship is suggested to be a means of comparing quality of winter ranges. Article in Journal/Newspaper Rangifer Rangifer tarandus Yukon University of Tromsø: Septentrio Academic Publishing Yukon Rangifer 6 2 253 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
caribou Rangifer tarandus activity winter range day length lying period |
spellingShingle |
caribou Rangifer tarandus activity winter range day length lying period Russell, D. E. Martell, A. M. Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying |
topic_facet |
caribou Rangifer tarandus activity winter range day length lying period |
description |
Data on the activity pattern, proportion of time spent lying and the length of active and lying periods in winter are presented from a 3 year study on the Porcupine caribou herd. Animals were most active at sunrise and sunset resulting in from one (late fall, early and mid winter) to two (early fall and late winter) to three (spring) intervening lying periods. Mean active/lying cycle length decreased from late fall (298 mm) to early winter (238 min), increased to a peak in mid winter (340 min) then declined in late winter (305 min) and again in spring (240 min). Mean length of the lying period increased throughout the 3 winter months from 56 min m early winter to 114 min in mid winter and 153 min in late winter. The percent of the day animals spent lying decreased from fall to early winter, increased throughout the winter and declined in spring. This pattern was related, in part, to day length and was used to compare percent lying among herds. The relationship is suggested to be a means of comparing quality of winter ranges. |
format |
Article in Journal/Newspaper |
author |
Russell, D. E. Martell, A. M. |
author_facet |
Russell, D. E. Martell, A. M. |
author_sort |
Russell, D. E. |
title |
Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying |
title_short |
Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying |
title_full |
Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying |
title_fullStr |
Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying |
title_full_unstemmed |
Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying |
title_sort |
winter ecology of the porcupine caribou herd, yukon: part iii, role of day length in determining activity pattern and estimating percent lying |
publisher |
Septentrio Academic Publishing |
publishDate |
1986 |
url |
https://septentrio.uit.no/index.php/rangifer/article/view/656 https://doi.org/10.7557/2.6.2.656 |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
Rangifer Rangifer tarandus Yukon |
genre_facet |
Rangifer Rangifer tarandus Yukon |
op_source |
Rangifer; Vol 6 (1986): Special Issue No. 1; 253-259 1890-6729 |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/656/623 https://septentrio.uit.no/index.php/rangifer/article/view/656 doi:10.7557/2.6.2.656 |
op_rights |
Copyright (c) 2015 D. E. Russell, A. M. Martell http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/2.6.2.656 |
container_title |
Rangifer |
container_volume |
6 |
container_issue |
2 |
container_start_page |
253 |
_version_ |
1766175080603189248 |