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食机会:在淡水鱼物种的巢守期间的捕食事件
Brett M Studden1,2, Timothy Fernandes1,2, Bailey McMeans1
1Department of Biology University of Toronto Mississauga Mississauga Ontario Canada.
Ecology and evolution
|March 14, 2025
概括
像鱼这样的捕食者可以食用被守护的鱼蛋,导致父母南瓜种子太阳鱼放弃巢. 这突显了掠食风险的增加,尽管的防御行为.
科学领域:
- 生态生态学 生态生态学
- 行为生态学 行为生态学
- 鱼类学 鱼类学 鱼类学
背景情况:
- 在淡水鱼类中,保护巢是常见的,影响性选择和社会层次.
- 筑巢和保护巢对后代的掠食风险和保护个体的影响还未得到充分研究.
- 南瓜种子太阳鱼 (Lepomis gibbosus) 是众所周知的筑巢者和防御者.
研究的目的:
- 为了记录筑巢的南瓜种子太阳鱼和普通鱼 (Chelydra serpentina) 之间的相互作用.
- 评估种巢的掠食企图和巢穴保护的有效性.
- 为了量化掠食者相互作用后的放弃情况.
主要方法:
- 在安大略省的一个湿地进行了三天的实地调查.
- 对密度,捕食者存在和捕食企图的观察.
- 在捕食者相互作用后放弃巢的量化.
主要成果:
- 观察到118个南瓜种子巢,主要是在殖民地.
- 抓在两个场合检查了九个守护的巢穴,并消耗了巢穴的内容.
- 在鱼与海互动48小时内,南瓜种子太阳鱼抛弃了三个巢.
- 守护雄性面临来自其他机会主义掠食者的掠食企图.
结论:
- 由南瓜种子太阳鱼守护的巢穴并不能完全阻止捕鱼的掠食.
- 捕食者可以食用被保护的鱼蛋,影响后代的生存.
- 在捕食者互动后,放弃可能会发生,影响繁殖成功.
- 需要进一步研究化对不同捕食者群体成人和后代生存的影响,以及蛋消费在捕食者能量预算中的作用.
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