Gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate
According to optimality theory, an individual's characteristics should play a major part in determining antipredator strategies. We studied behavioural reactions to human presence of gender and age classes of 35 thinhorn sheep (Ovis dalli Nelson, 1884) in late winter 2001 in Faro, Yukon Territo...
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crcansciencepubl:10.1139/z05-162 2024-09-30T14:34:38+00:00 Gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate Loehr, J Kovanen, M Carey, J Högmander, H Jurasz, C Kärkkäinen, S Suhonen, J Ylönen, H 2005 http://dx.doi.org/10.1139/z05-162 http://www.nrcresearchpress.com/doi/pdf/10.1139/z05-162 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 83, issue 12, page 1602-1607 ISSN 0008-4301 1480-3283 journal-article 2005 crcansciencepubl https://doi.org/10.1139/z05-162 2024-09-05T04:11:16Z According to optimality theory, an individual's characteristics should play a major part in determining antipredator strategies. We studied behavioural reactions to human presence of gender and age classes of 35 thinhorn sheep (Ovis dalli Nelson, 1884) in late winter 2001 in Faro, Yukon Territory, Canada. The behaviour of undisturbed sheep was observed from distances of 400–1200 m and compared with the behaviour recorded when one or two people were in close proximity to the sheep. Ewes decreased bedding and increased foraging when humans were present, but there were no changes in these behaviours in rams. Disturbance caused an increase in vigilance and a trend was found for adults to react more strongly to disturbance than juveniles. We demonstrate the importance for disturbance research of gaining detailed information about all different kinds of population members and using applicable statistical tests in the data analyses. Article in Journal/Newspaper Faro Yukon Canadian Science Publishing Yukon Canada Faro ENVELOPE(-133.353,-133.353,62.231,62.231) Canadian Journal of Zoology 83 12 1602 1607 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
According to optimality theory, an individual's characteristics should play a major part in determining antipredator strategies. We studied behavioural reactions to human presence of gender and age classes of 35 thinhorn sheep (Ovis dalli Nelson, 1884) in late winter 2001 in Faro, Yukon Territory, Canada. The behaviour of undisturbed sheep was observed from distances of 400–1200 m and compared with the behaviour recorded when one or two people were in close proximity to the sheep. Ewes decreased bedding and increased foraging when humans were present, but there were no changes in these behaviours in rams. Disturbance caused an increase in vigilance and a trend was found for adults to react more strongly to disturbance than juveniles. We demonstrate the importance for disturbance research of gaining detailed information about all different kinds of population members and using applicable statistical tests in the data analyses. |
format |
Article in Journal/Newspaper |
author |
Loehr, J Kovanen, M Carey, J Högmander, H Jurasz, C Kärkkäinen, S Suhonen, J Ylönen, H |
spellingShingle |
Loehr, J Kovanen, M Carey, J Högmander, H Jurasz, C Kärkkäinen, S Suhonen, J Ylönen, H Gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate |
author_facet |
Loehr, J Kovanen, M Carey, J Högmander, H Jurasz, C Kärkkäinen, S Suhonen, J Ylönen, H |
author_sort |
Loehr, J |
title |
Gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate |
title_short |
Gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate |
title_full |
Gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate |
title_fullStr |
Gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate |
title_full_unstemmed |
Gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate |
title_sort |
gender- and age-class-specific reactions to human disturbance in a sexually dimorphic ungulate |
publisher |
Canadian Science Publishing |
publishDate |
2005 |
url |
http://dx.doi.org/10.1139/z05-162 http://www.nrcresearchpress.com/doi/pdf/10.1139/z05-162 |
long_lat |
ENVELOPE(-133.353,-133.353,62.231,62.231) |
geographic |
Yukon Canada Faro |
geographic_facet |
Yukon Canada Faro |
genre |
Faro Yukon |
genre_facet |
Faro Yukon |
op_source |
Canadian Journal of Zoology volume 83, issue 12, page 1602-1607 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z05-162 |
container_title |
Canadian Journal of Zoology |
container_volume |
83 |
container_issue |
12 |
container_start_page |
1602 |
op_container_end_page |
1607 |
_version_ |
1811638181192269824 |