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风险行为是否会损害繁殖,并增加暴露于捕鱼的鱼群的脆弱性?
Rucha Karkarey1, L Boström Einarsson1, Nicholas A J Graham1
1Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK.
Biology letters
|August 6, 2024
概括
捕鱼压力改变了雄性四角尾的反捕食者和繁殖行为. 增加警和减少捕捞地点的领土防御可能会影响交配成功和长期的人口生存.
科学领域:
- 海洋生物学 海洋生物学
- 行为生态学 行为生态学
- 渔业科学 渔业科学
背景情况:
- 人类的干扰影响动物的反捕食者行为,以及生存和繁殖之间的能量权衡.
- 捕鱼压力是一个重要的人类干扰,影响海洋生态系统和物种行为.
研究的目的:
- 研究渔业压力对雄性四角 (Plectropomus areolatus) 抗捕食和繁殖行为的影响.
- 为了比较捕捞和非捕捞产卵聚合点之间的行为反应,并随着时间的推移跟踪变化.
主要方法:
- 使用观测采样和捕食者暴露实验来分析恐惧反应 (飞行开始距离,返回时间).
- 用于警,求爱和领土防御的时间被量化.
- 在捕捞和未捕捞的地点进行了未配对和配对的雄性之间的比较.
主要成果:
- 在捕捞地点的未配对的雄性表现出高度的恐惧反应,较早逃离,较晚返回领土.
- 与未捕鱼的地点相比,在捕鱼地点配对的雄性表现出改变的求爱行为.
- 高捕捞压力与警度增加和领土防御受到损害有关,可能会影响伴侣选择.
结论:
- 捕鱼压力扰乱了四角的关键生殖行为,影响了伴侣选择和潜在的长期人口生存能力.
- 在渔业压力下改变的行为权衡可能会降低短期捕获风险,但通过破坏繁殖,危及种群的生存.
- 人类在产卵集群上的开采实践的影响超出了直接去除,影响了对人口持久性至关重要的行为.
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