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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Language: | English |
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Septentrio Academic Publishing
1986
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Online Access: | https://doi.org/10.7557/2.6.2.656 https://doaj.org/article/90115d7d9c404e5e9427c255df293e12 |
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ftdoajarticles:oai:doaj.org/article:90115d7d9c404e5e9427c255df293e12 2023-05-15T15:53:30+02:00 Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying D. E. Russell A. M. Martell 1986-06-01T00:00:00Z https://doi.org/10.7557/2.6.2.656 https://doaj.org/article/90115d7d9c404e5e9427c255df293e12 EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/656 https://doaj.org/toc/1890-6729 doi:10.7557/2.6.2.656 1890-6729 https://doaj.org/article/90115d7d9c404e5e9427c255df293e12 Rangifer, Vol 6, Iss 2 (1986) caribou Rangifer tarandus activity winter range day length lying period Animal culture SF1-1100 article 1986 ftdoajarticles https://doi.org/10.7557/2.6.2.656 2022-12-30T21:58:56Z 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 caribou Rangifer Rangifer tarandus Yukon Directory of Open Access Journals: DOAJ Articles Yukon Rangifer 6 2 253 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
caribou Rangifer tarandus activity winter range day length lying period Animal culture SF1-1100 |
spellingShingle |
caribou Rangifer tarandus activity winter range day length lying period Animal culture SF1-1100 D. E. Russell A. M. Martell 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 Animal culture SF1-1100 |
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 |
D. E. Russell A. M. Martell |
author_facet |
D. E. Russell A. M. Martell |
author_sort |
D. E. Russell |
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://doi.org/10.7557/2.6.2.656 https://doaj.org/article/90115d7d9c404e5e9427c255df293e12 |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
caribou Rangifer Rangifer tarandus Yukon |
genre_facet |
caribou Rangifer Rangifer tarandus Yukon |
op_source |
Rangifer, Vol 6, Iss 2 (1986) |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/656 https://doaj.org/toc/1890-6729 doi:10.7557/2.6.2.656 1890-6729 https://doaj.org/article/90115d7d9c404e5e9427c255df293e12 |
op_doi |
https://doi.org/10.7557/2.6.2.656 |
container_title |
Rangifer |
container_volume |
6 |
container_issue |
2 |
container_start_page |
253 |
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1766388610852978688 |