照顾的幼寄生虫:亚社会黄蜂的替代巢穴策略
The American naturalist
|November 14, 2023
概括
繁殖寄生虫和宿主之间的物种间冲突是常见的. 亚社会黄蜂 (Ammophila pubescens) 表现出不寻常的繁殖寄生,入侵者提供宿主后代,导致复杂的相互作用和潜在的进化军备竞赛.
科学领域:
- 行为生态学 行为生态学
- 进化生物学 进化生物学
- 昆虫的行为昆虫的行为
背景情况:
- 卵巢寄生是宿主-寄生虫冲突的经典例子,寄生虫在宿主巢中产卵,造成成本.
- 亚社会黄蜂 (Ammophila pubescens) 表现出一种独特的繁殖寄生虫形式,在同类中交替在开始和蛋更换之间.
- 侵入者黄蜂经常在宿主巢中提供后代,这与典型的繁殖寄生虫行为有所不同.
研究的目的:
- 调查Ammophila pubescens中入侵者提供行为背后的原因.
- 了解这些不寻常的繁殖寄生虫相互作用的动态和健康后果.
- 为了探索这种物种中卵子替代策略的进化影响.
主要方法:
- 现场数据收集关于Ammophila pubescens的行为.
- 对主机和入侵者的供应策略和健身回报的分析.
- 卵子替代策略和结果的比较分析.
主要成果:
- 侵入者黄蜂不能通过采用非供应的繁殖寄生虫策略来改善健康状况;后代的生存取决于宿主供应.
- 虽然一些主机从入侵者提供中受益,但整体相互作用代表了寄生主义,主机承担了成本,入侵者受益.
- 侵入者更有可能在替换序列中产下最后一只蛋,这表明这种策略具有优势.
结论:
- 侵入者黄蜂在Ammophila pubescens中的供应行为是一种复杂的适应,由不确定的宿主供应驱动.
- 这种形式的同类繁殖寄生对宿主造成净成本,凸显了社会冲突的复杂性质.
- 选择可能有利于增强后代歧视,可能导致代价昂贵的卵子替代和反适应周期.
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