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标题：Population demography of the muskoxen in Jameson Land, 1982-1990
其他标题：Population demography of the muskoxen in Jameson Land, 1982-1990
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作者：Peter Aastrup ; Anders Mosbech
期刊名称：Rangifer
印刷版ISSN：1890-6729
出版年度：2000
卷号：20
期号：4
页码：229-238
DOI：10.7557/2.20.4.1518
语种：English
出版社：Swedish University of Agricultural Sciences
摘要：Studies of the Jameson Land muskox population in Northeast Greenland were conducted 1982-1990 in conjunction with an oil exploration. A population monitoring program consisted of one yearly aerial survey in late winter and a ground survey for population composition in August. The estimated unadjusted minimum average population size was approximately 4000 with a maximum size of 4700 and a minimum of 2800 muskoxen. The monitoring program was adequate to detect an annual change of about 10%. Population composition data proved to be essential. The only indication of a negative impact from oil exploration was detected in the fraction of yearlings. The average calf proportion was roughly 18% and about half of the calves died during their first year. The population density and composition was similar to the Banks Island muskox population in Canada and to the West Greenland population although the latter population had a higher productivity. Seismic operations and/or climatic conditions may have had a negative impact on the calf survival during 1986-1989, when fractions of yearlings were significantly lower than before and after the exploration.
关键词：Population Demography; Muskoxen; Greenland;Greenland; monitoring; muskox; population composition; population size; population trend; seismic surveys; pupulation dempgraphy; muskoxen; Jameson Land