High promiscuity among females of the invasive pest species Drosophila suzukii

Drosophila suzukii (Matsumura, 1931), the spotted-wing drosophila, is a highly invasive fruit fly that spread from Southern Asia across most regions of Asia, and in the last fifteen years has invaded Europe and the Americas. It is an economically important pest of small fruits such as berries and stone fruits. Drosophila suzukii speciated by adapting to cooler, mountainous and forest environments. In temperate regions, it evolved seasonal polyphenism traits which enhanced its survival during stressful winter population bottlenecks. Consequently, in these temperate regions, the populations undergo seasonal reproductive dynamics. Despite its economic importance, no data are available on the behavioural reproductive strategies of this fly. The presence of polyandry, for example, has not been determined despite the important role it might play in the reproductive dynamics of the populations.
We explored the presence of polyandry in an established population in Trentino, a region in North It...

斑翅果蝇（Drosophila suzukii, Matsumura, 1931，英文俗名spotted-wing drosophila）是一种极具入侵性的果蝇，其分布范围从南亚扩散至亚洲大部分区域，并在过去15年间入侵欧洲与美洲。该物种是浆果、核果类等小型果实的重要经济害虫。斑翅果蝇通过适应凉爽的山地与森林环境完成物种分化；在温带区域，其演化出季节性多型性状（seasonal polyphenism），以提升自身在冬季种群瓶颈胁迫环境中的存活率。因此，温带区域的该种群呈现出季节性繁殖动态。尽管其经济重要性突出，但目前尚无关于该蝇类行为繁殖策略的相关数据。例如，尽管一妻多夫制（polyandry）可能对种群繁殖动态发挥关键作用，但其存在性至今尚未明确。本研究针对意大利北部特伦蒂诺（Trentino）地区的一个已建立种群，探究了其中一妻多夫制的存在情况……