Related male Drosophila melanogaster reared together as larvae fight less and sire longer lived daughters.
Related male Drosophila melanogaster reared together as larvae fight less and sire longer lived daughters.
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DOI：
10.1002/ece3.1549
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发表时间：
2015-07
影响因子：
2.6
通讯作者：
Wigby S
中科院分区：
文献类型：
--
作者：
Carazo P;Perry JC;Johnson F;Pizzari T;Wigby S
争夺生殖机会可能导致雄性伤害雌性。然而，最近的研究表明，在果蝇中，在模拟雄性特异性群体粘性的条件下，雌性的雄性竞争和雄性伤害都减少了（即，在群体中，雄性是相关的，并且作为幼虫彼此一起饲养）。在这里，我们试图复制这些发现，并调查男性人口粘度是否会对下一代后代的健康产生影响。我们发现，不相关的不熟悉的群体（即，分开饲养的不相关个体）雄性比相关的熟悉的雄性群体（即，在幼虫期一起长大的全兄弟姐妹），支持先前的发现，并且需要暴露于雌性才能触发这些雄性-雄性竞争的差异模式。重要的是，我们表明，男性之间的竞争差异可以与跨代效应：暴露于无关的陌生男性的女性的女儿比暴露于相关的熟悉男性的女性的女儿遭受更高的死亡率。总的来说，这些结果表明，人口结构（即，当地雄性群体的亲缘关系和/或幼虫熟悉程度的变化）可以调节雄性与雄性之间的竞争，产生重要的跨代后果。
Competition over access to reproductive opportunities can lead males to harm females. However, recent work has shown that, in Drosophila melanogaster, male competition and male harm of females are both reduced under conditions simulating male-specific population viscosity (i.e., in groups where males are related and reared with each other as larvae). Here, we seek to replicate these findings and investigate whether male population viscosity can have repercussions for the fitness of offspring in the next generation. We show that groups of unrelated-unfamiliar (i.e., unrelated individuals raised apart) males fight more intensely than groups of related-familiar males (i.e., full siblings raised together as larvae), supporting previous findings, and that exposure to a female is required to trigger these differential patterns of male–male competition. Importantly, we show that differences in male–male competition can be associated with transgenerational effects: the daughters of females exposed to unrelated-unfamiliar males suffered higher mortality than the daughters of females exposed to related-familiar males. Collectively, these results suggest that population structure (i.e., variation in the relatedness and/or larval familiarity of local male groups) can modulate male–male competition with important transgenerational consequences.