在生命早期接触掠食者会影响克隆鱼的行为发展和个体变异
U Scherer1,2,3, K L Laskowski4,5, M M Kressler4,6
1SCIoI Excellence Cluster, Technische Universität Berlin, 10587, Berlin, Germany. u.k.scherer@gmail.com.
Scientific reports
|September 17, 2024
概括
捕食风险稳定了亚马逊 (Poecilia formosa) 的个体行为发展. 暴露于捕食者减少了活动,并随着时间的推移保持了一致的行为变化,与没有捕食者的环境不同.
科学领域:
- 行为生态学 行为生态学
- 发展生物学 发展生物学
- 进化生物学 进化生物学
背景情况:
- 捕食风险显著影响猎物种群内和猎物种群之间的行为差异.
- 关于捕食对个体行为变化的影响的先前研究产生了相互矛盾的结果.
- 了解在掠食压力下个体变化的发展轨迹至关重要.
研究的目的:
- 为了研究掠食风险如何塑造个人之间随着时间的推移行为变化的发展.
- 通过使用克隆亚马逊 (Poecilia formosa) 来控制遗传和经验因素.
- 为了分析特定的养行为 (活动,持续时间,访问) 作为对捕食者线索的反应.
主要方法:
- 青少年亚马逊被养了4周,在养期间有或没有可见的捕食者线索.
- 量化了养期间的活动水平,养时间和访问养地点的次数.
- 统计分析比较了掠食者暴露和对照组之间的行为变化.
主要成果:
- 与捕食者接触过的鱼在食期间活动减少,但与对照群相比,平均食行为没有变化.
- 在没有捕食者的情况下,个体间的食时间变化增加,而活动变化随着时间的推移而减少.
- 与对照者相比,捕食者暴露导致了所有测量行为的个人间变化稳定,并且往往较低.
结论:
- 捕食风险似乎对个体行为变化的发展轨迹产生稳定作用.
- 掠食风险的种群层面差异可能导致个体之间的行为变化模式的分歧.
- 这项研究强调了发育过程在调解生态因素对行为多样性的影响中的作用.
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