环状海 (Pusa hispida) 在白令海,楚克奇海和波福特海的外出行为和出现时间
Jessica M Lindsay1,2, Paul B Conn2, Peter L Boveng2
1School of Aquatic and Fishery Sciences University of Washington Seattle Washington USA.
Ecology and evolution
|January 27, 2026
概括
环状海从冬季的巢穴中出现受到白天的长度和温度的影响. 了解这种过渡对于准确地利用北极地区的空中调查进行人口监测至关重要.
科学领域:
- 海洋哺乳动物生态学
- 北极的野生动物行为行为
- 保护生物学 保护生物学
背景情况:
- 环状海 (Pusa hispida) 是依赖冰的海洋哺乳动物,在重要生命阶段使用海冰上的雪洞.
- 春季从巢穴使用过渡到表面拖 (出现) 了解得很少,这影响了人口评估.
- 环状海出现的准确时间对于解释用于人口监测的空中调查数据至关重要.
研究的目的:
- 通过使用卫星遥测数据,估计冬季巢穴中环状海的出现日期.
- 确定影响环状海出现时间的环境因素.
- 提高对环状海种群监测的空中调查的准确性和计划性.
主要方法:
- 利用隐藏的马尔科夫模型 (HMM) 来分析2005-2021年间的卫星连接发射器数据.
- 模拟的拖出行为,区分成年和未成年海的"隐藏"和"出现"状态.
- 研究了诸如日长,温度,海冰度和融雪等共变量对出现时间的影响.
主要成果:
- 环状海的中位出现日期估计为5月12日,与之前的空中调查估计密切一致.
- 成年环状海出现的概率与日长的增加和空气温度的升温有积极的相关性.
- 出现的时间显示与度有积极的关联,在更高的度上的海后来出现.
结论:
- 隐藏的马尔科夫模型提供了一个有价值的工具,用于从遥测数据中估计环状海出现的时间.
- 日长和温度等环境因素对环状海出现的时间有很大影响.
- 对出现时间的更好理解提高了在气候变化中对北极海洋哺乳动物监测的空中调查的可靠性.
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