Temperature coupling of mate attraction signals and female mate preferences in four populations of Enchenopa treehopper (Hemiptera: Membracidae)
Temperature coupling of mate attraction signals and female mate preferences in four populations of Enchenopa treehopper (Hemiptera: Membracidae)
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DOI：
10.1111/jeb.13506
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发表时间：
2019-07-30
影响因子：
2.1
通讯作者：
Fowler-Finn, Kasey D.
中科院分区：
文献类型：
--
作者：
Jocson, Dowen Mae, I;Smeester, Morgan E.;Fowler-Finn, Kasey D.
温度的变化可以影响各种重要的与适应性相关的行为的表达，包括那些与配偶吸引和选择有关的行为，从而影响在不同环境下的交配协调。我们研究了温度如何影响雄性交配信号和雌性交配偏好的表达，以及雄性信号和雌性交配偏好在不同温度下的变化（信号-偏好-温度耦合）之间的关系。这些以植物为食的小昆虫通过植物传播的振动进行交流，我们的实地调查表明，它们在交配季节经历了显著的自然温度变化。我们在一个受控的实验室环境中，通过控制温度，测试了四个种群的信号-偏好温度耦合。我们测量了雄性信号的频率——雌性表现出最强烈偏好的特征——以及雌性的峰值偏好——雌性最喜欢的信号频率——在生物学相关的温度范围内（18摄氏度至36摄氏度）。我们发现温度对雄性信号和雌性偏好都有很强的影响，这在每个种群中产生了信号-偏好温度耦合。即使在一个雄性信号与雌性偏好不匹配的种群中，温度耦合也加强了在所有温度下预测的方向选择。此外，我们发现不同种群在信号和偏好上的热敏感性相似，尽管种群在雄性信号的平均频率和雌性偏好的峰值上有所不同。总之，这些结果表明，温度变化不应该影响通过雌性选择进行性选择的行为，而是应该加强信号偏好匹配种群的稳定选择，以及信号偏好不匹配种群的定向选择。最后，我们没有预测温度变化会通过在极端温度下产生信号偏好不匹配而破坏该物种的交配协调。
Variation in temperature can affect the expression of a variety of important fitness-related behaviours, including those involved with mate attraction and selection, with consequences for the coordination of mating across variable environments. We examined how temperature influences the expression of male mating signals and female mate preferences-as well as the relationship between how male signals and female mate preferences change across temperatures (signal-preference temperature coupling)-in Enchenopa binotata treehoppers. These small plant-feeding insects communicate using plantborne vibrations, and our field surveys indicate they experience significant natural variation in temperature during the mating season. We tested for signal-preference temperature coupling in four populations of E. binotata by manipulating temperature in a controlled laboratory environment. We measured the frequency of male signals-the trait for which females show strongest preference-and female peak preference-the signal frequency most preferred by females-across a range of biologically relevant temperatures (18 degrees C-36 degrees C). We found a strong effect of temperature on both male signals and female preferences, which generated signal-preference temperature coupling within each population. Even in a population in which male signals mismatched female preferences, the temperature coupling reinforces predicted directional selection across all temperatures. Additionally, we found similar thermal sensitivity in signals and preferences across populations even though populations varied in the mean frequency of male signals and female peak preference. Together, these results suggest that temperature variation should not affect the action of sexual selection via female choice, but rather should reinforce stabilizing selection in populations with signal-preference matches, and directional selection in those with signal-preference mismatches. Finally, we do not predict that thermal variation will disrupt the coordination of mating in this species by generating signal-preference mismatches at thermal extremes.