遥测揭示了夏威夷的虎 (Galeocerdo cuvier) 的潜在交配聚合行为
Paige Wernli1, Mark Royer2, Anke Kügler2
1Hawai'i Institute of Marine Biology, University of Hawai'i at Mānoa, 46-007 Lilipuna Rd, Kaneohe, HI, 96744, USA. pwernli@hawaii.edu.
Scientific reports
|December 18, 2025
概括
虎在夏威夷展现季节性迁徙,可能是为了交配. 研究人员观察到成熟的雄性和雌性聚集在一起,这表明这个孤独的物种以前没有记录的交配行为.
科学领域:
- 海洋生物学 海洋生物学
- 行为生态学 行为生态学
- 保护科学 保护科学
背景情况:
- 虎 (Galeocerdo cuvier) 通常是海洋生态系统中孤独的顶峰捕食者.
- 关于它们的社会行为,迁移模式和聚合动态的数据有限.
- 了解这些方面对于有效的保护和管理策略至关重要.
研究的目的:
- 研究夏威夷群岛内在虎中观察到的季节性部分迁移的驱动因素.
- 为了确定这些迁移是否主要受到交配或食行为的影响.
- 为了记录虎的潜在交配聚合,这种行为以前没有在这个物种中观察到.
主要方法:
- 对在夏威夷群岛标记的虎的长期声学遥测数据的分析.
- 鱼迁徙时间和聚合模式与已知的交配季节和猎物可用性 (驼背) 的相关性.
- 对成熟的雄性和雌性虎的时空空间分析重叠,并直接观察与交配相关的行为.
主要成果:
- 在奥阿胡岛附近标记的成熟虎展现了季节性迁移到毛伊岛,与当地交配季节相吻合.
- 在毛伊附近标记的虎显示全年居住,在Olowalu有明显的季节性爱.
- 成熟的雄性和雌性高度重叠,以及身体交配的迹象,表明在Olowalu.有潜在的交配聚合.
- 鱼的丰富性在驼存在之前达到顶峰,这表明捕食机会也可能影响聚合时间.
结论:
- 这项研究提供了第一个证据,证明了虎的潜在季节性交配聚合.
- 这些发现表明,交配和寻找食物的行为都有助于形成这些聚合物.
- 记录的聚合物是分散的,延伸了几公里,持续了几周,挑战了虎纯粹是孤独的概念.
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