Abstract Larvae of the mosquito Toxorhynchites rutilus (Coquillett) prey upon other container-dwelling insects, including larvae of Aedes albopictus (Skuse), which is native to Asia but was introduced into the United States, and on the native tree hole mosquito Ochlerotatus triseriatus (Say). Previous work has established that O. triseriatus adopts low-risk behaviors in the presence of predation risk from T. rutilus. It is unknown whether introduced A. albopictus show a similar response to this predator. Behavior of fourth instars of A. albopictus or O. triseriatus was recorded in water that had held either A. albopictus or O. triseriatus larvae alone (control) and in water that had held T. rutilus larvae feeding on either A. albopictus or O. triseriatus (predation). Activity and position of larvae were recorded in 30-min instantaneous scan censuses. In response to water-borne cues to predation, O. triseriatus adopted low-risk behaviors (more resting, less feeding and movement), but A. albopictus did not change its behavior. We also tested the species specificity of the cues by recording the behavior of A. albopictus in water prepared using O. triseriatus and vice versa. O. triseriatus adopted low-risk behaviors even in predation water prepared by feeding T. rutilus with A. albopictus, but A. albopictus did not alter its behavior significantly between predation and control treatments prepared using O. triseriatus. Thus, A. albopictus does not seem to respond behaviorally to cues produced by this predator and may be more vulnerable to predation than is O. triseriatus.

中文翻译：

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两种容器蚊子对水源捕食线索的不同行为反应


摘要 红毛弓蚊 (Coquillett) 的幼虫捕食其他容器栖息的昆虫，包括原产于亚洲但被引入美国的白纹伊蚊 (Skuse) 幼虫，以及本地树洞蚊 Ochlerotatus triseriatus (说）。先前的研究已经证实，在存在 T. rutilus 捕食风险的情况下，O. triseriatus 会采取低风险行为。目前尚不清楚引入的白纹伊蚊是否对这种捕食者表现出类似的反应。在单独饲养白纹伊蚊或三列纹蜱幼虫的水中（对照）以及以白纹伊蚊或三纹纹蜱幼虫为食的金红纹蜱幼虫的水中记录了白纹伊蚊或三纹纹蜱第四龄的行为。 . triseriatus（捕食）。在 30 分钟的瞬时扫描普查中记录幼虫的活动和位置。为了应对水中的捕食信号，三纹伊蚊采取了低风险行为（更多地休息，更少的进食和运动），但白纹伊蚊并没有改变其行为。我们还通过记录白纹伊蚊在用三列伊蚊制备的水中的行为来测试线索的物种特异性，反之亦然。即使在用白纹伊蚊喂食红纹伊蚊而制备的捕食水中，三纹伊蚊也采取了低风险行为，但白纹伊蚊在捕食和使用三纹伊蚊制备的对照处理之间没有显着改变其行为。因此，白纹伊蚊似乎不会对这种捕食者产生的信号做出行为反应，并且可能比三纹伊蚊更容易受到捕食。