Rapid Loss of Resistance to Satyrization in Invasive Mosquitoes and the Effects of Age on Interspecific Mating Frequency
Rapid Loss of Resistance to Satyrization in Invasive Mosquitoes and the Effects of Age on Interspecific Mating Frequency
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DOI：
10.1093/jme/tjy153
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发表时间：
2019-03-01
影响因子：
2.1
通讯作者：
Lounibos, L. Philip
中科院分区：
文献类型：
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作者：
Bargielowski, Irka;Honorio, Nildimar A.;Lounibos, L. Philip
在埃及伊蚊Aedes Aegypti(L.)(双翅目：蚊科)和白纹伊蚊(Skuse)(双翅目：蚊科)在成功入侵后进行了接触，Ae.埃及人已经被Ae迅速取代。白纹伊蚊。最近的研究证实，交配干扰，以色氨酸的形式，可能是这些竞争性移位的驱动因素。然而，在共处的地点，Ae.埃及伊蚊雌性进化出对色素化的抗性，在实验室中，对色素化敏感的Ae。埃及伊蚊可以在笼子里暴露于Ae的几代内进化出抵抗力。白纹伊蚊。这种抗性特征的维持成本可能很高，因为已有研究表明，抗盐碱化的雌性在配偶选择上投入了更多的时间。在这里，我们表明，在没有盐化压力的情况下，增加的盐化阻力并不持续，这证实了维持这一特性的成本。天哪。以前被选来提高抗盐碱化能力的埃及品系在八个世代中表现出这一性状的快速下降。越来越多的人支持这一假设，即条件依赖的配偶偏好会导致种群内不同质量的个体在交配选择上的差异。在这里，我们研究了与年龄相关的生殖努力或生殖价值的变化如何导致年龄相关的配偶选择。我们假设，年龄较大、素质较低的个体可能更有可能接受低于平均水平的交配，在这种情况下是种间交配。我们的结果表明，蚊子的年龄显著影响种间交配率，年龄较大的蚊子(雄性和雌性)比年轻的蚊子更频繁地进行种间交配(26.32比9.41%)。我们讨论了与年龄相关的信号变化导致交配障碍随着年龄的增加而被打破的可能性。
In several areas where Aedes aegypti (L.) (Diptera: Culicidae) and Aedes albopictus (Skuse) (Diptera: Culicidae) have come in contact following successful invasions, Ae. aegypti have been rapidly displaced by Ae. albopictus. Recent work has confirmed that mating interference, in the form of satyrization, is likely a driving factor in these competitive displacements. However, in sites of sympatry, Ae. aegypti females evolve resistance to satyrization, and in the laboratory, satyrization-susceptible Ae. aegypti can evolve resistance within a few generations of cage exposure to Ae. albopictus. The resistance trait may be costly to maintain, as satyrization-resistant females have been shown to invest more time in mate selection. Here, we show that increased satyrization-resistance does not persist in the absence of satyrization pressure, confirming a cost to maintaining this trait. Ae. aegypti lines that had been previously selected for increased satyrization-resistance demonstrated rapid decreases in this trait over eight generations. Support for the hypothesis that condition-dependent mate preferences lead to variation in mating choice among individuals of differing quality within a population has been accumulating. Here we examine how age-related changes in reproductive effort or reproductive value may result in age-dependent mate choice. We hypothesize that older, lower quality individuals may be more likely to accept a subpar mating, in this case an interspecific mating. Our results demonstrate that mosquito age significantly affects interspecific mating rates with older mosquitoes (male and female) engaging in interspecific mating more frequently than younger counterparts (26.32 vs 9.41%). We discuss the possibility of age-related signal variation causing the breakdown of mating barriers with age.