Obligate, but not facultative, satellite males prefer the same male sexual signal characteristics as females
Obligate, but not facultative, satellite males prefer the same male sexual signal characteristics as females
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卫星男性是专性的，但不是兼性的，更喜欢与女性相同的男性性信号特征
DOI：
10.1016/j.anbehav.2018.07.014
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发表时间：
2018
期刊：
影响因子：
2.5
通讯作者：
M. Zuk
中科院分区：
文献类型：
--
作者：
Rachel Olzer;M. Zuk
平翼雄性和雌性偏好相同的鸣叫模式。正常翅膀的雄鸟对四种鸣叫模式没有任何偏好。我们的研究表明，雄性可以区分发出信号的雄性。有吸引力的男性可能会吸引更多的窃听者，因此适合度较低。信号传递在能量上是昂贵的，并且增加了被捕食和寄生虫感染的风险。为了平衡吸引配偶的成本和收益，个体可能会采用另一种交配策略，如卫星行为，在这种策略中，不发出信号的雄性会在发出信号的雄性附近定居，并试图拦截接近的雌性。虽然许多人认为其他的策略是“在糟糕的工作中取得最好的结果”，但很少有研究调查卫星，特别是义务卫星，是否有可能通过优先选择更有吸引力的信号者来提高它们的交配成功率。我们使用太平洋蟋蟀，Teleogryllus oceanicus，测试了这样一个假设：雄性蟋蟀更有可能像卫星一样，用特别有吸引力的歌声向雄性发出信号，因为这些鸣叫声可能吸引最多的雌性。在这个物种中，一种新的雄性翅膀突变，“平翼”，使一些雄性无法呼叫。平翼是专性卫星，而非突变的正常翼雄性在呼叫和卫星策略之间切换。我们给雄性提供了不同比例的鸣叫声模型，这是雌性选择的一个重要特征。正如之前对雌性的研究所显示的那样，扁翼鸟对60%的鸣叫声表现出强烈的偏好。正常的雄鸟不喜欢任何特定的鸣叫模式。我们的研究结果得出了一个矛盾的结论，即拥有非常有吸引力的歌曲的雄性可能没有最高的交配成功率。这种雄性对雄性性信号的偏好可能会反对雌性的选择，并增加信号雄性和卫星雄性之间的竞争。这可能会减缓雄性特征进化的速度，并影响雄性竞争的进化。
HighlightsFlatwing males preferred the same calling song model as females.Normal-wing males showed no preference for any of the four calling song models.Our work shows that males can discriminate among signalling males.Attractive males may attract more eavesdroppers and thus have lower fitness.Signalling is energetically expensive and increases the risk of predation and parasite infection. To balance the costs and benefits of mate attraction, individuals may adopt an alternative mating strategy such as satellite behaviour, in which nonsignalling males will settle near signalling males and attempt to intercept approaching females. While many suggest that alternative strategies are ‘making the best of a bad job’, little research has examined whether satellites, particularly obligate satellites, have the potential to increase their mating success by preferentially targeting more attractive signallers. Using the Pacific field cricket, Teleogryllus oceanicus, we tested the hypothesis that males are more likely to act as satellites to signalling males with particularly attractive songs, as these callers are likely to attract the most females. In this species, a novel male wing mutation,‘flatwing’, renders some males unable to call. Flatwings are obligate satellites, while nonmutated, normal-wing males switch between calling and satellite strategies. We presented males with calling song models varying in the percentage of long-to-short chirps, a characteristic important in female choice. As was shown for females in previous work, flatwings exhibited a strong preference for calling songs composed of 60% long chirp. Normal wing males did not prefer any particular calling song model. Our results lead to the paradoxical conclusion that males with highly attractive songs may not have the highest mating success. Such male preference for male sexual signals may oppose selection by females and increase competition between signalling and satellite males. This could potentially slow the rate of male trait evolution and influence the evolution of male competition.
果蝇中的伴侣选择是理性的和适应性的。
影响因子：
16.6
作者：
Arbuthnott D;Fedina TY;Pletcher SD;Promislow DE
通讯作者：
Promislow DE