• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >Site fidelity of Svalbard polar bears revealed by mark-recapture positions
【24h】

Site fidelity of Svalbard polar bears revealed by mark-recapture positions

机译：标记夺回的位置揭示了斯瓦尔巴北极熊的保真度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Quantifying the degree of site fidelity in polar bears' (Ursus maritimus) use of denning and mating areas in spring is of considerable interest for both basic and applied purposes. We analyzed 276 spring-to-spring movements (displacements) of 178 polar bears obtained from mark-recapture in the period 1987-2010 in Svalbard, Norway. Male and female subadults and adults showed site fidelity (only subadult females non-significantly) when their movements were compared to a scenario of random movements between all capture locations. The median observed displacement was 47.6 km (bootstrapped 95 % CI: 38.6-57.8 km), significantly smaller than the median potential displacement for random movements of 206.3 km (bootstrapped 95 % CI: 187.3-219.6 km). Subadult females tended to have the longest displacements, followed by adult males and adult females. However, large individual variation both in displacement distances and recapture frequency tended to blur age and sex differences. Analysis restricted to one movement for each bear showed that the difference between adult males and adult females was small and non-significant. This indicates that findings based on telemetry, which is almost always restricted to females, may be relatively representative of the whole adult Barents Sea population in the spring season.
机译：对于基本目的和应用目的，在春季量化北极熊（Ursus maritimus）定植区和交配区的位置保真度是相当重要的。我们分析了1987-2010年间在挪威斯瓦尔巴特群岛从标记回收中获得的178只北极熊的276个弹簧到弹簧的运动（位移）。将男性和女性亚成人和成年人的运动与所有捕获地点之间随机运动的情况进行比较时，它们显示出地点保真度（只有亚成人女性没有显着性）。观察到的中位位移为47.6 km（自举95％CI：38.6-57.8 km），显着小于206.3 km（自举95％CI：187.3-219.6 km）随机运动的中位潜在位移。亚成年女性倾向于位移最长，其次是成年男性和成年女性。但是，位移距离和捕获频率的个体差异较大，往往会模糊年龄和性别差异。对每只熊进行一次运动限制的分析表明，成年雄性和成年雌性之间的差异很小且不显着。这表明基于遥测的发现几乎总是限于女性，这可能是春季春季整个巴伦支海成年种群的相对代表。

著录项

  • 来源
    《Polar biology》 |2013年第1期|27-39|共13页
  • 作者

    Karen Lone; Jon Aars; Rolf Anker Ims;

  • 作者单位

    Norwegian Polar Institute, Fram Centre,9296 Tromso, Norway,Department of Arctic and Marine Biology,University of Tromso, 9037 Tromso, Norway;

    Norwegian Polar Institute, Fram Centre,9296 Tromso, Norway;

    Department of Arctic and Marine Biology,University of Tromso, 9037 Tromso, Norway;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ursus maritimus; philopatry; displacement; age and sex effects; arctic; movement;

    机译：ursus maritimus;哲学家移位;年龄和性别影响;北极;运动;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号