保持球滚动:在不同程度的感知掠食压力下,陆地同类动物的凝聚行为中的性差异
Francisco Javier Zamora-Camacho1
1Department of Biogeography and Global Change, Museo Nacional de Ciencias Naturales, Madrid, Spain.
PeerJ
|December 25, 2023
概括
木的反掠食者行为受到感知到的掠食风险的影响,雄性比雌性表现出更长的防御反应. 这表明,抗捕食者策略中的性别特异性适应适应不同风险.
科学领域:
- 行为生态学 行为生态学
- 动物行为 动物行为
- 进化生物学 进化生物学
背景情况:
- 反捕食者行为是由成本效益平衡所塑造的,当收益不超过成本时,理论上将其最小化.
- 费用包括能源支出和减少其他增强健身活动的时间.
- 捕食风险影响反捕食者的行为,预计更高的风险可以最大限度地提高这些行为,特别是在显眼的个体中.
研究的目的:
- 为了研究性别,体型和反掠食者行为之间的相互作用,在常见的药丸木 (Armadillidium vulgare).
- 为了确定暴露于捕食者线索是否会影响凝聚的持续时间 (防御性滚动).
- 分析性别和体重如何影响反捕食者反应.
主要方法:
- 在这项研究中,木暴露在掠食者 (便),非掠食者 (子) 或对照者 (蒸水) 的化学线索中.
- 在标准化机械刺激后测量了凝结延迟 (解卷时间).
- 性别和体重被列入分析变量.
主要成果:
- 暴露于捕食者线索的木表现出更大的延迟来展开,表明长期的防御行为.
- 这种强烈的抗捕食者反应仅在男性中观察到,而不是女性.
- 身体尺寸与展开的延迟没有显著的相关性.
结论:
- 反捕食者行为是由捕食者线索调节的,与成本效益考虑保持一致.
- 抗捕食者行为中的性二态性表明,雄性可能面临更高的捕食风险,导致进化,更敏感的防御策略.
- 研究结果强调,反掠食者策略与环境风险微调,并且性别之间可能存在显著差异.
相关概念视频
Predator-Prey Interactions
16.2K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
16.2K
Types of Selection
40.5K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
40.5K
Mate Choice
8.0K
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
8.0K
Competition
21.7K
When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
21.7K
Speciation Rates
21.2K
Overview
21.2K
Fixed Action Patterns
16.0K
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
16.0K


