Host specificity and variation in oviposition behaviour of milkweed stem weevils and implications for species divergence

Host specificity and variation in oviposition behaviour of milkweed stem weevils and implications for species divergence
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马利筋茎象甲的寄主特异性和产卵行为的变化及其对物种分化的影响

DOI:
10.1111/een.12899
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发表时间:
2020
影响因子:
2.2
通讯作者:
Agrawal, Anurag A.
Agrawal, Anurag A.
中科院分区:
农林科学3区
文献类型:
--
作者:
Arcila Hernández, Lina M.;Davis, Steven R.;Agrawal, Anurag A.

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1.草食动物的生活史策略,包括资源利用的优化,受到其进化历史和生态因素的限制。我们问,如果相关的和共分布的草食动物物种保持一致的主机偏好和产卵行为沿着物种的范围。调查了两种乳草茎象甲,线颈乳草象甲和线颈乳草象甲。annectens,与其寄主叙利亚马利筋(Asclepiassyriaca)和阿氏马利筋(A.化身3.我们证实了两种象鼻虫的地位,形态和一个bilocus基因同源性的差异支持。此外,我们发现,物种分化概括了象鼻虫目前的寄主植物使用。4.我们发现产卵的物种内和物种之间的变化。R.在产卵前,触角随意地戳茎或环绕茎。与此同时,R. lineaticollis主要是在北部的沟茎,但在南部戳或环带。产卵模式的变化可能是对寄主植物防御变化的反应。5.在自然界中,象鼻虫严格地在各自的寄主植物上产卵,而在
1. An herbivore’s life-history strategy, including optimization of resource use, is constrained by its evolutionary history and ecological factors varying across the landscape.2. We asked if related and co-distributed herbivore species maintain consistency of host preference and oviposition behaviours along the species’ range. We surveyed two putative species of milkweed stem weevils, Rhyssomatus lineaticollis and R. annectens, which co-occur alongside their hosts, Asclepias syriaca and A. incarnata. 3. We confirmed the two species status of weevils, supported by differences in morphology and a bilocus gene phylogeny. Furthermore, we found that species divergence recapitulated the weevils current host plant use. 4. We found oviposition variation within and between species. R. annectens poked the stem haphazardly or girdled it before oviposition. Meanwhile, R. lineaticollis primarily trenched stems in the north, but poked or girdled in the south. Variation in oviposition patterns could be a response to variation in host plant defenses. 5. In nature, weevils strictly oviposited on their respective host plants, while in
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