Time-dependent oviposition deterrence by an oviposition mark in a fungus-farming lizard beetle

Time-dependent oviposition deterrence by an oviposition mark in a fungus-farming lizard beetle
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真菌养殖蜥蜴甲虫中产卵标记的时间依赖性产卵威慑

DOI:
10.1007/s00114-020-01710-0
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发表时间:
2020
期刊:
The Science of Nature
影响因子:
--
通讯作者:
Toki Wataru
Toki Wataru
中科院分区:
--
文献类型:
--
作者:
Miyazaki Yuta;Toki Wataru

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在昆虫中,选择合适的产卵地点对后代的表现至关重要。产卵时避开已被同种幼鱼占据的寄主是减少种内竞争的机制之一。产卵的女性已经很好地记录在寄生蜂和植食性昆虫,但仍然未知的真菌性昆虫,以避免这样的主机。在这里,我们报告的产卵标志(OMs)的真菌养殖蜥蜴甲虫,Doubledaya bucculenta(鞘翅目:Erotillidae:Languriinae),阻止同种女性产卵。雌虫挖开寄主竹节间壁进入产卵洞,产卵后用切下的竹纤维堵塞。幼虫在单个节间内完成其发育。为了确定什么类型的OMs的功能作为产卵威慑和如何产卵威慑模式与后代的生存,我们研究了产卵行为,卵期的长度,和反应的幼虫卵。当一个单一的节间提供,大多数女性产卵的节间没有OM,不完整的OM,或插件删除完整的OM(COM),但很少有女性奠定了新鲜COM的节间,没有女性奠定了那些与老COM。当鸡蛋在恒温条件下饲养时,鸡蛋周期长度各不相同,这表明晚产的鸡蛋有时比早产的鸡蛋更早孵化。当幼虫遇到卵时,所有的卵很快就被杀死。这些结果表明,女性避免节间与后代死亡率高,COM的插头包含一个产卵威慑线索。考虑到产卵忌避昆虫包括D.由于颊蝇栖息在时空有限的地点,并且具有有限的移动性,幼虫阶段的高度资源竞争可能驱动了产卵威慑的进化。
In insects, the selection of a suitable oviposition site is critical for offspring performance. Avoiding hosts already occupied by conspecific immatures in oviposition is one of the mechanisms to reduce intraspecific competition. The avoidance of such hosts by ovipositing females has been well-documented in parasitoid wasps and phytophagous insects but remains unknown in mycophagous insects. Here, we report that oviposition marks (OMs) of the fungus-farming lizard beetle,Doubledaya bucculenta(Coleoptera: Erotylidae: Languriinae), deter conspecific females from oviposition. The females excavate a wall of host bamboo internodes to access cavities for oviposition and plug the holes with excised bamboo fibers after oviposition. A larva completes its development within a single internode. To determine what types of OMs function as oviposition deterrents and how the oviposition-deterring pattern associates with offspring survival, we examined the oviposition behaviors, egg-period lengths, and reactions of larvae to eggs. When a single internode was provided, most females laid eggs in internodes with no OMs, incomplete OMs, or plug-removed completed OMs (COMs), but fewer females laid in internodes with fresh COMs and no females laid in those with old COMs. When eggs were reared under constant temperatures, egg-period lengths varied, suggesting that later-laid eggs sometimes hatch earlier than earlier-laid eggs. When a larva encountered an egg, all eggs were killed shortly. These results suggest that the females avoid internodes associated with high offspring mortality and that the COM’s plug contains an oviposition-deterring cue. Given that larvae of oviposition-deterring insects includingD. bucculentainhabit spatiotemporally-limited sites and have limited mobility, high resource competition in the larval stage may have driven the evolution of oviposition deterrence.
Khin Mar Wai:“寄生于豆象甲幼虫的黄蜂之间的种内幼虫竞争。”
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