Sex ratio and the evolution of aggression in fruit flies.
Sex ratio and the evolution of aggression in fruit flies.
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DOI：
10.1098/rspb.2020.3053
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发表时间：
2021-03-31
期刊：
影响因子：
--
通讯作者：
Perry JC
中科院分区：
文献类型：
--
作者：
Bath E;Edmunds D;Norman J;Atkins C;Harper L;Rostant WG;Chapman T;Wigby S;Perry JC
攻击性行为是动物最引人注目的表现之一，攻击性强烈影响许多物种的适应性。攻击性随着社会环境的变化而发生可塑性变化，但我们缺乏直接的测试来研究攻击性如何在性内竞争中进化。我们研究了如何侵略在两性进化的竞争环境中，使用果蝇种群，我们实验性地发展下女性偏见，平等，和男性偏见的性别比例。我们发现，在一个偏向雌性的环境中进化后，雄性对配偶的竞争减少了，雄性在食物块上的争斗减少了，尽管攻击行为的总频率和持续时间没有改变。在雌性中，在雌性偏向的环境中进化雌性对资源的竞争更激烈导致交配后的雌性之间更频繁的攻击性互动，沿着交配后攻击性的增加。这些变化，女性的侵略不能仅仅归因于进化，无论是在女性或男性刺激女性的侵略，这表明性别之间的共同进化的相互作用决定女性交配后的侵略。我们发现的证据与男性和女性之间的侵略性正相关的遗传相关性一致，表明共同的遗传基础。这项研究证明了与健身密切相关的行为的实验进化，以及社会环境塑造竞争行为进化的潜力。
Aggressive behaviours are among the most striking displayed by animals, and aggression strongly impacts fitness in many species. Aggression varies plastically in response to the social environment, but we lack direct tests of how aggression evolves in response to intra-sexual competition. We investigated how aggression in both sexes evolves in response to the competitive environment, using populations of Drosophila melanogaster that we experimentally evolved under female-biased, equal, and male-biased sex ratios. We found that after evolution in a female-biased environment—with less male competition for mates—males fought less often on food patches, although the total frequency and duration of aggressive behaviour did not change. In females, evolution in a female-biased environment—where female competition for resources is higher—resulted in more frequent aggressive interactions among mated females, along with a greater increase in post-mating aggression. These changes in female aggression could not be attributed solely to evolution either in females or in male stimulation of female aggression, suggesting that coevolved interactions between the sexes determine female post-mating aggression. We found evidence consistent with a positive genetic correlation for aggression between males and females, suggesting a shared genetic basis. This study demonstrates the experimental evolution of a behaviour strongly linked to fitness, and the potential for the social environment to shape the evolution of contest behaviours.
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影响因子：
9.2
作者：
Carvalho, GB;Kapahi, P;Benzer, S
通讯作者：
Benzer, S
DOI：
10.1080/10236249309378862
发表时间：
1993-01-01
期刊：
MARINE BEHAVIOUR AND PHYSIOLOGY
影响因子：
--
作者：
GRANT, JWA
通讯作者：
GRANT, JWA
影响因子：
3.3
作者：
Aronsen, Tonje;Berglund, Anders;Rosenqvist, Gunilla
通讯作者：
Rosenqvist, Gunilla
影响因子：
2.5
作者：
Gaskin, T;Futerman, P;Chapman, T
通讯作者：
Chapman, T
影响因子：
56.9
作者：
Clark, AG;Begun, DJ;Prout, T
通讯作者：
Prout, T