使用多州开放的强大设计模型量化与岛屿相关的旋海豚的繁殖率和生存率
Liah McPherson1, Janelle Badger2, Kyleigh Fertitta3
1Marine Mammal Research Program, Hawai'i Institute of Marine Biology, University of Hawai'i at Mānoa, Honolulu, HI, USA. liahlm@hawaii.edu.
Scientific reports
|June 26, 2024
概括
这项研究估计了旋转海豚 (Stenella longirostris亚种). 在奥阿胡岛附近使用照片识别来获取丰富和生存信息. 这些发现为保护这些脆弱的海洋哺乳动物提供了关键数据.
科学领域:
- 海洋哺乳动物生态学
- 人口动态 人口动态
- 保护生物学 保护生物学
背景情况:
- 螺旋海豚 (Stenella longirostris亚种) 是一个有趣的动物. 在夏威夷近海水域面临人类的威胁,由于限制行为和遗传隔离.
- 准确的数量和生存数据对于有效保护旋海豚至关重要,但目前缺乏.
- 之前的研究已经描述了旋转海豚的发生和行为,但没有描述种群规模或生存率.
研究的目的:
- 为了估计鱼在瓦胡岛的瓦伊阿纳海岸附近的大量,明显的生存和迁徙率.
- 为夏威夷旋海豚提供支持知情化的保护和管理策略的数据.
- 建立未来人口监测和研究的基准.
主要方法:
- 基于设计的照片识别调查在两年的八个季节性实地季节中进行.
- 采用多态开放稳固设计 (MSORD) 和POPAN建模来分析数据.
- 用标记回收技术来评估种群参数.
主要成果:
- 季节性丰度估计范围从140个到373个个体,在冬季观察到的数量最低.
- 估计的明显生存率为0.95,有临时移民的证据.
- 在整个研究期间,该研究区域的超级人口规模估计为633个人.
结论:
- 这项研究提供了第一个系统的标记-重新捕获估计的丰富性和O'ahu的旋转海豚的生存.
- 这些发现突显了旋海豚的脆弱性,并为保护工作提供了必要的数据.
- 建议进一步研究岛际流动,以了解更广泛的人口动态,并为奥阿胡/4岛群的管理提供信息.
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