The fruit fly, Drosophila suzukii, is an invasive species that causes widespread crop damage in the United States. We examined a series of basic reproductive behaviors in this species in order to expand our knowledge of the life history of D. suzukii. We also conducted a comparison study using its sister species, D. biarmipes, to determine if the two species shared any similarities in sexual behavior. The behaviors investigated were sexual attractiveness, sexual receptivity, and offspring production. The sexual attractiveness and remating frequency (possibly reflecting sexual receptivity) of both D. suzukii and D. biarmipes females decreased significantly after an initial copulation and did not recover within 14 days. D. suzukii and D. biarmipes females also produced an average of 85.19 ± 6.27 and 104.45 ± 6.90 viable offspring, respectively, over the two weeks following the initial copulation, suggesting that they were able to store sperm over an extended period of time. We also found that the sexual attractiveness of virgin D. suzukii decreased as they aged. This decline may be related to nutrition, as their attractiveness did not diminish when the females were raised on a blueberry as well as standard media and yeast. Our results, coupled with the findings of other studies investigating basic life history and reproductive biology parameters, can aid in the effort to halt the spread of D. suzukii by informing and refining future and current pest management strategies.

中文翻译：

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铃木果蝇和双臂果蝇雌性交配后行为的分析

果蝇 Drosophila suzukii 是一种入侵物种，在美国造成广泛的农作物损害。我们检查了该物种的一系列基本繁殖行为，以扩展我们对 D. suzukii 生活史的了解。我们还使用其姐妹物种 D. biarmipes 进行了一项比较研究，以确定这两个物种在性行为方面是否有任何相似之处。调查的行为是性吸引力、性接受度和后代生产。D. suzukii 和 D. biarmipes 雌性的性吸引力和再交配频率（可能反映了性接受能力）在初次交配后显着下降，并且在 14 天内没有恢复。D. suzukii 和 D. biarmipes 雌性也分别产生了平均 85.19 ± 6.27 和 104.45 ± 6.90 个有活力的后代，在初次交配后的两周内，这表明它们能够在很长一段时间内储存精子。我们还发现原始 D. suzukii 的性吸引力随着年龄的增长而下降。这种下降可能与营养有关，因为当雌性用蓝莓以及标准培养基和酵母饲养时，它们的吸引力并没有减弱。我们的结果，再加上调查基本生活史和生殖生物学参数的其他研究的结果，可以通过告知和完善未来和当前的害虫管理策略来帮助阻止 D. suzukii 的传播。这种下降可能与营养有关，因为当雌性用蓝莓以及标准培养基和酵母饲养时，它们的吸引力并没有减弱。我们的结果，再加上调查基本生活史和生殖生物学参数的其他研究的结果，可以通过告知和完善未来和当前的害虫管理策略来帮助阻止 D. suzukii 的传播。这种下降可能与营养有关，因为当雌性用蓝莓以及标准培养基和酵母饲养时，它们的吸引力并没有减弱。我们的结果，再加上调查基本生活史和生殖生物学参数的其他研究的结果，可以通过告知和完善未来和当前的害虫管理策略来帮助阻止 D. suzukii 的传播。