Making a healthy choice: Tactical host selection behaviour of a parasitoid wasp

IF 2 3区 农林科学 Q2 ENTOMOLOGY
Aswathi Sasidharan, Enakshi Ghosh, Radhika Venkatesan
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引用次数: 0

Abstract

Abstract Image

做出健康的选择:寄生蜂的战术性宿主选择行为
寄主选择行为在决定寄生虫成功与否方面起着关键作用,尤其是在寄主质量参差不齐的环境中。在异质环境中,寄生虫经常会遇到受感染的寄主。我们进行了实验,以确定外寄生虫 Bracon brevicornis 是否能区分健康毛虫和受苏云金芽孢杆菌(Bt)感染的毛虫,并研究了这种宿主选择行为的影响。在嗅觉选择试验中,鲂会避开受 Bt 感染的 Spodoptera litura 宿主。在无选择试验中,雌性寄生虫在受感染的寄主身上表现出较低的麻痹率,这表明了一种强烈的选择行为。此外,我们还通过让雌蜂接触受 Bt 感染 24、48 和 72 小时的幼虫,探讨了感染持续时间的影响。选择和非选择试验都表明,无论感染持续时间长短,雌蜂都不会在受感染的幼虫上产卵。通过食用直接接触 Bt 不会影响受试寄生蜂的适应性。然而,宿主幼虫在感染 Bt 24 小时后,血细胞总密度增加,吞噬细胞数量特别高,黑色素化增强,使宿主幼虫不适合寄生蜂的发育。总之,我们的研究强调,寄生虫会主动避开受感染的寄主,从而表现出强有力的寄主选择行为。这一观点对于制定新的农业害虫控制策略,保护有益的寄生虫非常有价值。
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来源期刊
Ecological Entomology
Ecological Entomology 生物-昆虫学
CiteScore
4.90
自引率
4.50%
发文量
94
审稿时长
3 months
期刊介绍: Ecological Entomology publishes top-quality original research on the ecology of insects and related invertebrate taxa. Our aim is to publish papers that will be of considerable interest to the wide community of ecologists who are motivated by ecological or evolutionary theory. The suitability of a manuscript will usually be assessed within 5 days. We publish full-length Original Articles as well as Reviews, Short Communications, Methods and Natural History papers. In Original Articles, we greatly prefer papers that test specific hypotheses and which have a high degree of novelty. All categories aim for innovative contributions that advance the subject of ecological entomology.
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