Social signals mediate oviposition site selection in Drosophila suzukii.

Social signals mediate oviposition site selection in Drosophila suzukii.
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DOI:
10.1038/s41598-021-83354-2
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发表时间:
2021-02-15
期刊:
影响因子:
4.6
通讯作者:
Burrack HJ
Burrack HJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Elsensohn JE;Aly MFK;Schal C;Burrack HJ

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雌性昆虫在产卵地点选择过程中感知和使用的信息很复杂,并且因物种和生态位而异。即使在相对未开发的生态位中,雌性也会在产卵地点与同种直接或间接地相互作用。这些相互作用可以采取宿主标记和在决策过程中重新评估先前产卵地点的形式。大量研究集中在多食性入侵害虫 Drosophila suzukii Matsumura(双翅目:果蝇科)的生态位宽度和宿主偏好上,但关于同种信号如何调节产卵行为的信息很少。我们研究了雌性铃木 D. suzukii 在产卵地点选择中可能使用的三层社会信息——(1) 预先存在的卵密度,(2) 预先存在的幼虫占据,以及 (3) 成虫的宿主标记。我们发现,幼虫和寄主标记的存在,而不是卵密度,影响产卵行为,并且这两个因素随着时间的推移相互作用。成虫标记似乎仅在存在未标记基质的情况下才能阻止产卵。这些结果是果蝇物种中宿主标记信息素的第一个行为证据。这些发现还可能有助于阐明铃木虫在农田和自然区域内的侵染和偏好模式。
The information that female insects perceive and use during oviposition site selection is complex and varies by species and ecological niche. Even in relatively unexploited niches, females interact directly and indirectly with conspecifics at oviposition sites. These interactions can take the form of host marking and re-assessment of prior oviposition sites during the decision-making process. Considerable research has focused on the niche breadth and host preference of the polyphagous invasive pest Drosophila suzukii Matsumura (Diptera: Drosophilidae), but little information exists on how conspecific signals modulate oviposition behavior. We investigated three layers of social information that female D. suzukii may use in oviposition site selection—(1) pre-existing egg density, (2) pre-existing larval occupation, and (3) host marking by adults. We found that the presence of larvae and host marking, but not egg density, influenced oviposition behavior and that the two factors interacted over time. Adult marking appeared to deter oviposition only in the presence of an unmarked substrate. These results are the first behavioral evidence for a host marking pheromone in a species of Drosophila. These findings may also help elucidate D. suzukii infestation and preference patterns within crop fields and natural areas.
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