Condition, not eyespan, predicts contest outcome in female stalk-eyed flies, Teleopsis dalmanni.
Condition, not eyespan, predicts contest outcome in female stalk-eyed flies, Teleopsis dalmanni.
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DOI：
10.1002/ece3.1467
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发表时间：
2015-05
影响因子：
2.6
通讯作者：
Seddon, Nathalie
中科院分区：
文献类型：
--
作者：
Bath, Eleanor;Wigby, Stuart;Vincent, Claire;Tobias, Joseph A.;Seddon, Nathalie
关键词：
在男性之间的竞赛中，身体状况往往是决定胜负的关键因素，而战斗能力则通过所谓的武器来体现，即夸张的、依赖于条件的特征。然而，尚不清楚条件和夸大特征在女性中是否以同样的方式发挥作用。在这里，我们通过改变茎眼蝇（Teleopsis dalmanni）幼虫的营养来控制成虫的状况，该物种的两性眼跨都被夸大，并且我们测量了具有相似或不同身体状况和相对眼跨的雌性之间竞争的结果。我们发现，体格较高、体格较大、眼距较大的雌性在与体格较低的对手竞争时，获胜的比例较高。然而，当雌性处于同等条件时，眼距和体长都不会影响比赛结果。对之前发表的数据的分析显示，男性也存在类似的模式：相对眼距较大的个体在与体型相似的个体竞争时并没有赢得更多的遭遇。与预期相反，也与之前在男性中的研究结果相反，体型或眼距的差异对女性比赛持续时间没有明显影响。总而言之，我们的研究结果表明，尽管眼距可以提供诚实的状况指标，但大眼距在性内攻击性遭遇中对任何性别都没有提供额外的好处；相反，身体尺寸是最重要的因素。
In contests among males, body condition is often the key determinant of a successful outcome, with fighting ability signaled by so-called armaments, that is, exaggerated, condition-dependent traits. However, it is not known whether condition and exaggerated traits function in the same way in females. Here, we manipulated adult condition by varying larval nutrition in the stalk-eyed fly, Teleopsis dalmanni, a species in which eyespan is exaggerated in both sexes, and we measured the outcome of contests between females of similar or different body condition and relative eyespan. We found that females in higher condition, with both larger bodies and eyespan, won a higher proportion of encounters when competing against rivals of lower condition. However, when females were of equal condition, neither eyespan nor body length had an effect on the outcome of a contest. An analysis of previously published data revealed a similar pattern in males: individuals with large relative eyespan did not win significantly more encounters when competing with individuals of a similar body size. Contrary to expectations, and to previous findings in males, there was no clear effect of differences in body size or eyespan affecting contest duration in females. Taken together, our findings suggest that although eyespan can provide an honest indicator of condition, large eyespans provide no additional benefit to either sex in intrasexual aggressive encounters; body size is instead the most important factor.
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影响因子：
0.9
作者：
Griggio, Matteo;Zanollo, Valeria;Hoi, Herbert
通讯作者：
Hoi, Herbert
DOI：
10.1111/j.1095-8312.1995.tb01063.x
发表时间：
1995-07-01
影响因子：
1.9
作者：
FITZPATRICK, S;BERGLUND, A;ROSENQVIST, G
通讯作者：
ROSENQVIST, G
影响因子：
2
作者：
ENQUIST, M;LEIMAR, O
通讯作者：
LEIMAR, O
影响因子：
1
作者：
Al-khairulla, H;Warburton, D;Knell, RJ
通讯作者：
Knell, RJ
影响因子：
2.4
作者：
Cotton, Alison J.;Cotton, Samuel;Pomiankowski, Andrew
通讯作者：
Pomiankowski, Andrew