School of Life Sciences, Keele University, Keele, UK.
Am J Trop Med Hyg. 2011 Aug;85(2):265-70. doi: 10.4269/ajtmh.2011.10-0677.
Abstract. Upon mating, male mosquitoes transfer accessory gland proteins (Acps) that induce refractoriness to further mating in females. This can also occur because of cross-insemination by males of related species, a process known as mating interference (satyrization). This mechanism could explain the competitive displacement of resident Aedes aegypti by the invasive Aedes albopictus where they co-occur. We tested this hypothesis in mosquito populations in Florida. A new polymerase chain reaction species diagnostic applied to sperm dissected from 304 field-collected females revealed bidirectional cross-mating in five (1.6%) individuals. Cross-injections of females with Acps showed that Ae. albopictus males induced monogamy in heterospecific females but not Ae. aegypti males. Despite its low frequency in the areas under study, the first evidence of cross-mating in nature and the asymmetric effect of Acps on mating suggest that satyrization may have initially contributed to the observed competitive reduction of Ae. aegypti by invasive Ae. albopictus in many areas.
摘要。交配时，雄性蚊子会传递附属腺蛋白（Acps），使雌性对进一步交配产生抗性。这种情况也可能是由于雄性与相关物种的交叉授精，即交配干扰（性诱导）所致。这种机制可以解释在它们共同存在的情况下，入侵的白纹伊蚊对本地埃及伊蚊的竞争取代。我们在佛罗里达州的蚊子种群中测试了这一假设。一种新的聚合酶链反应种诊断方法应用于从 304 只现场采集的雌性蚊子的精子中进行分析，发现有 5 只（1.6%）个体存在双向交叉交配。对雌性进行 Acps 的交叉注射表明，白纹伊蚊雄性会诱导异源雌性的一夫一妻制，但埃及伊蚊雄性则不会。尽管在研究区域中的频率较低，但这是首次在自然界中发现交叉交配的证据，以及 Acps 对交配的不对称影响表明，性诱导可能最初导致了在许多地区观察到的入侵白纹伊蚊对本地埃及伊蚊的竞争减少。
