Within-group male relatedness reduces harm to females in Drosophila.
Within-group male relatedness reduces harm to females in Drosophila.
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DOI：
10.1038/nature12949
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发表时间：
2014-01-30
期刊：
影响因子：
64.8
通讯作者：
Pizzari T
中科院分区：
文献类型：
--
作者：
Carazo P;Tan CK;Allen F;Wigby S;Pizzari T
解决将竞争转变为合作的机制是理解生物组织的关键。这与性内竞争特别相关，这往往导致雄性伤害雌性。最近的理论认为，亲属选择可以通过放松亲属之间的竞争来调节女性的伤害。我们通过实验操纵了雄性黑腹果蝇（Drosophila melanogaster）竞争雌性的群体的相关性，以证明正如预期的那样，群体内的相关性抑制了雄性竞争和雌性伤害。与暴露于彼此无关的雄性三胞胎的雌性相比，暴露于与雌性无关的三个兄弟的雌性具有更高的终生生殖成功率和更慢的生殖衰老。兄弟三胞胎之间的争斗也更少，追求雌性的频率也更低，而且比没有血缘关系的雄性三胞胎寿命更长。然而，兄弟之间的关联可能容易受到少数无关男性的入侵：当两个兄弟与一个无关男性配对时，后者平均产生的后代数量是任何一个兄弟的两倍。这些结果表明，相关性可以深刻地影响健身通过其调制的性内竞争，苍蝇可塑性调整性行为的方式与亲属选择理论相一致。
Resolving the mechanisms that switch competition to cooperation is key to understand biological organization. This is particularly relevant for intrasexual competition, which often leads to males harming females. Recent theory proposes that kin selection may modulate female harm by relaxing competition among relatives. We experimentally manipulated the relatedness of groups of male Drosophila melanogaster competing over females to demonstrate that, as expected, within group relatedness inhibits male competition and female harm. Females exposed to three brothers unrelated to the female had higher lifetime reproductive success and slower reproductive ageing compared to females exposed to triplets of males unrelated to each other. Triplets of brothers also fought less with each other, courted females less intensively and lived longer than triplets of unrelated males. However, associations among brothers may be vulnerable to invasion by minorities of unrelated males: when two brothers were matched with an unrelated male, the latter sired on average twice as many offspring as either brother. These results demonstrate that relatedness can profoundly affect fitness through its modulation of intrasexual competition, as flies plastically adjust sexual behaviour in a way consistent with kin selection theory.
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DOI：
10.1073/pnas.1631700100
发表时间：
2003-08-19
影响因子：
11.1
作者：
Liu, HF;Kubli, E
通讯作者：
Kubli, E
影响因子：
10.5
作者：
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通讯作者：
Noll, M
影响因子：
2.1
作者：
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通讯作者：
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影响因子：
56.9
作者：
MCDONALD, DB;POTTS, WK
通讯作者：
POTTS, WK
影响因子：
2.1
作者：
Fedorka, KM;Zuk, M
通讯作者：
Zuk, M