Re-estimating the Size of the Polar Bear Population in Western Hudson Bay
Re-estimating the Size of the Polar Bear Population in Western Hudson Bay
复制标题
重新估计哈德逊湾西部北极熊的数量
DOI：
10.14430/arctic1105
复制
发表时间：
1997
期刊：
影响因子：
1.2
通讯作者：
G. B. Kolenosky
中科院分区：
文献类型：
--
作者：
N. Lunn;I. Stirling;D. Andriashek;G. B. Kolenosky
1994年和1995年对哈德逊湾无冰期间上岸的北极熊(Ursus Maritimus)进行了一项标记-重新捕获研究，以重新估计哈德逊湾西部的种群数量。之前的估计是基于在丘吉尔河和纳尔逊河之间捕获的动物；因此，该种群地理范围南部的熊没有被抽样。我们使用Jolly-Seber模型从两个数据集中重新估计了种群数量：1984年至1995年在丘吉尔和纳尔逊河之间处理的熊，以及1984至1986年在丘吉尔和马尼托巴省-安大略省边界之间处理的熊，以及我们在1994年和1995年处理的熊。这两组数据给出了类似的估计。因此，我们对1995年秋季哈德逊湾西部北极熊数量的最佳估计是1200±250只。关键词：人口估计，人口模型，北极熊，黑熊，马尼托巴省，安大略省
A mark-recapture study of polar bears ( Ursus maritimus ) ashore during the ice-free period of Hudson Bay was undertaken in 1994 and 1995 to re-estimate the size of the western Hudson Bay population. Previous estimates were based on animals caught between the Churchill and Nelson Rivers; consequently, bears in the southern part of the geographic range of this population were not sampled. We used Jolly-Seber models to re-estimate population size from two data sets: bears handled between the Churchill and Nelson Rivers from 1984 to 1995 and bears handled between Churchill and the Manitoba-Ontario border from 1984 to 1986 and by us in 1994 and 1995. Both data sets gave similar estimates. Thus, our best estimate of the size of the western Hudson Bay polar bear population is 1200 ±250 animals in autumn 1995. Key words: population estimates, population models, polar bear, Ursus maritimus , Manitoba, Ontario