Sagrario Cordero-Molina, Laura Mendoza, Yesenia Alvarado, Indrikis Krams, Jorge Contreras-Garduño
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引用次数: 0
摘要
在终端投资策略中,生物在死亡风险高、未来繁殖机会不确定的情况下,分配资源以最大化当前繁殖。然而,压力和生殖投资(求偶vs求偶和交配)之间的时间间隔是否会触发终端投资策略仍不清楚。我们用氧化应激作为应激源在黄粉虫中检验了这一假设。考虑到这是第一次使用氧化应激来触发终端投资,我们首先进行了配偶选择试验,雄性暴露于5,20,40或80毫米的促氧化剂百草枯(PQ)中,对雌性进行求爱行为。随后,我们分析了每种剂量下的男性死亡率。与对照组相比,暴露于5毫米处理的雄性小鼠存活率更高,而暴露于80毫米处理的雄性小鼠寿命更短。求偶后,对照组与20或40 mM PQ处理组之间的死亡率无显著差异。值得注意的是,只有暴露于40毫米PQ的雄性比对照组更受欢迎。在第三个实验中,我们量化了雄性在氧化应激(40 mM)后不同时间间隔求偶和交配的生存成本。当雄性暴露于40 mM PQ并在3 h后交配时,它们的死亡率明显低于暴露于氧化应激、求偶和交配但在24 h后交配的雄性。我们认为,氧化应激剂量与求偶和交配之间的时间间隔的相互作用可能解释了支持终端投资或诚实信号的相反结果。
期刊介绍:
Ecological Entomology publishes top-quality original research on the ecology of insects and related invertebrate taxa. Our aim is to publish papers that will be of considerable interest to the wide community of ecologists who are motivated by ecological or evolutionary theory. The suitability of a manuscript will usually be assessed within 5 days.
We publish full-length Original Articles as well as Reviews, Short Communications, Methods and Natural History papers. In Original Articles, we greatly prefer papers that test specific hypotheses and which have a high degree of novelty. All categories aim for innovative contributions that advance the subject of ecological entomology.