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首页> 外文期刊>The Coleopterists bulletin >RELATIONSHIP BETWEEN OVIPOSITION SITE SELECTION AND MANDIBULAR ASYMMETRY IN TWO SPECIES OF LIZARD BEETLES, ANADASTUS PULCHELLOIDES NAKANE AND DOUBLEDAYA BUCCULENTA LEWIS (COLEOPTERA: EROTYLIDAE: LANGURIINAE)
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RELATIONSHIP BETWEEN OVIPOSITION SITE SELECTION AND MANDIBULAR ASYMMETRY IN TWO SPECIES OF LIZARD BEETLES, ANADASTUS PULCHELLOIDES NAKANE AND DOUBLEDAYA BUCCULENTA LEWIS (COLEOPTERA: EROTYLIDAE: LANGURIINAE)

机译：两种蜥蜴，甲,、中N和双翅目昆虫的位点选择与下颌不对称之间的关系

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Mouthparts and genae of the adult females of Doubledaya bucculenta Lewis (Coleoptera: Erotylidae: Languriinae) exhibit distinct directional asymmetry. Females excavate holes with their mandibles on hard internodes of bamboos to deposit their eggs on the inner surface of internodes. To determine the relationship between the spatial distribution pattern of completed oviposition marks (COMs) and the degree of mandibular asymmetry, COMs were counted on the culms and internodes of the bamboo Pleioblastus simonii (Carrière) Nakai (Poaceae), and the survival rate of immature stages was investigated. Another languriine beetle, Anadastus pulchelloides Nakane, exhibits a smaller degree of mandibular asymmetry. For this species, COMs were also investigated on culms and internodes but of the perennial grass Arundinella hirta (Thunb.) Tanaka. Females of the two beetle species selected large basilar internodes of host plant culms for oviposition in the field. The mean number ± SD of COMs per COM-containing internode was 1.1 ± 0.4 for both D. bucculenta and A. pulchelloides, suggesting that COMs deterred females from ovipositing on COM-containing internodes. Larvae of D. bucculenta completed development within an internode. The survival rate of D. bucculenta immature stages increased as the internodes increased in size. Given the positive correlation between adult body size and internode size, it is possible that the markedly asymmetric mandibles of D. bucculenta females help with oviposition in internodes that give higher fitness to the offspring.
机译：Doubledaya bucculenta Lewis（鞘翅目：Erotylidae：Languriinae）成年雌性的口部和属显示出明显的方向不对称性。雌性用下颌骨在坚硬的竹节节上挖洞，以将卵沉积在节节的内表面上。为了确定完整的产卵标记（COMs）的空间分布模式与下颌不对称程度之间的关系，对中生的Pleioblastus simonii（Carrière）Nakai（Poaceae）的茎和节间计数COMs，以及未成熟的存活率阶段进行了调查。另一只金龟子甲虫Anadastus pulchelloides Nakane表现出较小的下颌不对称性。对于该物种，还对茎秆和节间的COMs进行了调查，但对多年生田ArArundinella hirta（Thunb。）Tanaka的草进行了调查。两种甲虫的雌性选择了寄主植物茎的大型基底节间在田间产卵。 D. bucculenta和A. pulchelloides的每个含COM的节间的COM的平均值±SD为1.1±0.4，这表明COM阻止了雌性在含COM的节间产卵。 D. bucculenta的幼虫在节间内完成了发育。球藻未成熟阶段的存活率随着节间大小的增加而增加。鉴于成年个体体重与节间大小之间存在正相关关系，鳞茎杜鹃雌性的明显不对称下颌骨可能有助于节间产卵，从而使子代的适应性更高。

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