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在捕食鱼的存在下,当地淡水的行为变化
Arthur Afeitos Silva1, Thais Dias Mendonça1, Carolina Alves Ribeiro2
1Universidade Federal de Ouro Preto, Programa de Pós-graduação em Ecologia de Biomas Tropicais, Instituto de Ciências Exatas e Biológicas. Departamento de Biodiversidade, Evolução e Meio Ambiente. Campus Morro do Cruzeiro, s/n, Bauxita, Ouro Preto, Minas Gerais 35402-136, Brazil.
Behavioural processes
|September 8, 2024
概括
捕食者的存在改变了的行为,减少了食和运动,同时增加了庇护所的使用. 红腹海豚在Macrobrachium jelskii中引发了反捕食者反应.
科学领域:
- 行为生态学 行为生态学
- 水生生态学 水生生态学
- 捕食者和猎物的动力学
背景情况:
- 捕食压力显著影响猎物的行为,影响食,活动和息地选择.
- 捕食物种通常减少食和活动,并在捕食者存在时避免高风险区域.
研究的目的:
- 调查红腹海豚 (Pygocentrus nattereri) 对Macrobrachium jelskii的行为和息地利用的视觉影响.
- 为了测试这种假设,会在捕食者的存在下表现出改变的行为,包括减少活动和增加寻求庇护的行为.
主要方法:
- 进行了20项行为试验,比较了的行为,并没有捕食鱼的存在.
- 对于Macrobrachium jelskii,使用扫描采样收集行为数据,在5分钟的试验中每15秒记录一次即时记录.
- 每个试验使用五只单独的来评估行为变化.
主要成果:
- 红腹海豚的存在显著降低了M. jelskii的运动和食行为.
- 当捕食者在场时,会表现出更多的环境探索和捕食者检查行为.
- 在捕食者的存在下,M. jelskii的避难所利用率显著增加.
结论:
- 红腹海豚在Macrobrachium jelskii中有效地引起了反捕食者的行为.
- 观察到的反捕食者策略,如减少活动和增加避难所使用,通过尽量减少警和积极的逃跑行为,似乎是有益的.
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