Calf Production, Calf Survival, and Recruitment of Muskoxen on Banks Island during a Period of Changing Population Density from 1986–99
sex and age classification surveys of muskoxen were conducted during summer. We estimated calf production (number of calves per 100 females aged 2 years or more), calf survival, and recruitment (number of yearlings per 100 females aged 2 years or more). Calf production ranged from 31.3 to 56.3 and w...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.525.5632 2023-05-15T14:19:36+02:00 Calf Production, Calf Survival, and Recruitment of Muskoxen on Banks Island during a Period of Changing Population Density from 1986–99 Nicholas C. Larter John A. Nagy The Pennsylvania State University CiteSeerX Archives 2001 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.5632 http://pubs.aina.ucalgary.ca/arctic/Arctic54-4-394.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.5632 http://pubs.aina.ucalgary.ca/arctic/Arctic54-4-394.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic54-4-394.pdf Key words demography forage muskoxen Northwest Territories Ovibos moschatus population weather text 2001 ftciteseerx 2016-01-08T10:20:34Z sex and age classification surveys of muskoxen were conducted during summer. We estimated calf production (number of calves per 100 females aged 2 years or more), calf survival, and recruitment (number of yearlings per 100 females aged 2 years or more). Calf production ranged from 31.3 to 56.3 and was similar between periods of increasing and decreasing density (mean = 42.3 vs. 40.8). Calf survival ranged from 23 % to 83 % and was generally higher while density was increasing than during its decline (mean = 60 vs. 45). Survival at a given density was lower following the 1994 peak in density. Recruitment ranged from 10.0 to 41.7 and was higher (p = 0.06) during the period of increasing density than during the decline (mean = 28.0 vs. 17.2). Calf survival and recruitment were lowest following two consecutive severe winters, but animal density explained more of the variation in survival and recruitment than did late-winter snow depth. There was a positive relationship between the proportion of sedge (Carex spp., Eriophorum scheuchzeri) in the summer diet and calf survival and recruitment. Patterns of calf survival and recruitment plotted against density were consistent with those modelling a density-dependent relationship. Our results suggest that severe weather alone cannot explain the fluctuations in the population dynamics of Banks Island muskoxen and that underlying density-dependent Text Arctic Banks Island Eriophorum scheuchzeri Northwest Territories ovibos moschatus Unknown Northwest Territories |
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ftciteseerx |
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English |
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Key words demography forage muskoxen Northwest Territories Ovibos moschatus population weather |
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Key words demography forage muskoxen Northwest Territories Ovibos moschatus population weather Nicholas C. Larter John A. Nagy Calf Production, Calf Survival, and Recruitment of Muskoxen on Banks Island during a Period of Changing Population Density from 1986–99 |
topic_facet |
Key words demography forage muskoxen Northwest Territories Ovibos moschatus population weather |
description |
sex and age classification surveys of muskoxen were conducted during summer. We estimated calf production (number of calves per 100 females aged 2 years or more), calf survival, and recruitment (number of yearlings per 100 females aged 2 years or more). Calf production ranged from 31.3 to 56.3 and was similar between periods of increasing and decreasing density (mean = 42.3 vs. 40.8). Calf survival ranged from 23 % to 83 % and was generally higher while density was increasing than during its decline (mean = 60 vs. 45). Survival at a given density was lower following the 1994 peak in density. Recruitment ranged from 10.0 to 41.7 and was higher (p = 0.06) during the period of increasing density than during the decline (mean = 28.0 vs. 17.2). Calf survival and recruitment were lowest following two consecutive severe winters, but animal density explained more of the variation in survival and recruitment than did late-winter snow depth. There was a positive relationship between the proportion of sedge (Carex spp., Eriophorum scheuchzeri) in the summer diet and calf survival and recruitment. Patterns of calf survival and recruitment plotted against density were consistent with those modelling a density-dependent relationship. Our results suggest that severe weather alone cannot explain the fluctuations in the population dynamics of Banks Island muskoxen and that underlying density-dependent |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Nicholas C. Larter John A. Nagy |
author_facet |
Nicholas C. Larter John A. Nagy |
author_sort |
Nicholas C. Larter |
title |
Calf Production, Calf Survival, and Recruitment of Muskoxen on Banks Island during a Period of Changing Population Density from 1986–99 |
title_short |
Calf Production, Calf Survival, and Recruitment of Muskoxen on Banks Island during a Period of Changing Population Density from 1986–99 |
title_full |
Calf Production, Calf Survival, and Recruitment of Muskoxen on Banks Island during a Period of Changing Population Density from 1986–99 |
title_fullStr |
Calf Production, Calf Survival, and Recruitment of Muskoxen on Banks Island during a Period of Changing Population Density from 1986–99 |
title_full_unstemmed |
Calf Production, Calf Survival, and Recruitment of Muskoxen on Banks Island during a Period of Changing Population Density from 1986–99 |
title_sort |
calf production, calf survival, and recruitment of muskoxen on banks island during a period of changing population density from 1986–99 |
publishDate |
2001 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.5632 http://pubs.aina.ucalgary.ca/arctic/Arctic54-4-394.pdf |
geographic |
Northwest Territories |
geographic_facet |
Northwest Territories |
genre |
Arctic Banks Island Eriophorum scheuchzeri Northwest Territories ovibos moschatus |
genre_facet |
Arctic Banks Island Eriophorum scheuchzeri Northwest Territories ovibos moschatus |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic54-4-394.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.5632 http://pubs.aina.ucalgary.ca/arctic/Arctic54-4-394.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291402493263872 |