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首页> 外文期刊>Caldasia >Potential fecundity, larval development, and survival of two invasive species of iArhopalus/i (Coleoptera: Cerambycidae) coexisting in southern South America
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Potential fecundity, larval development, and survival of two invasive species of iArhopalus/i (Coleoptera: Cerambycidae) coexisting in southern South America

机译：南美洲南美洲的潜在繁殖率，幼虫发育和两种侵入性物种的生存（殖民植物：Cerambycidae）共存

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摘要

Biological invasions are one of the main threats to forest health. Although Arhopalus rusticus and Arhopalus syriacus (Cerambycidae) are alien species in South America, the ecology of these invasive species is not well studied. Here, we examined the effect of the female size on potential fecundity, size and number of mature eggs in ovaries, in both insect species. We also compared egg morphometric characteristics, larval measurements, larval development and survival between these two species. We found a positive relationship between the female size and the number of eggs in their ovaries but no relationship between the female size and egg morphometric characteristics in each of these two species. The females of A. rusticus were significantly larger and had bigger eggs than those of A. syriacus, but no significant difference was observed in the number of eggs between them. Larval body length and head capsule exuviae width were larger in A. rusticus than in A. syriacus. Arhopalus rusticus had the highest larval survival rate, but A. syriacus had the shortest larval period. Thus, female and egg size, as well as larval size and survivorship are competitive advantages to A. rusticus. However, A. syriacus has a similar number of eggs to A. rusticus and faster larval development; these could be key features to explain the coexistence of these two species.
机译：生物侵犯是森林健康的主要威胁之一。虽然Arhopalus Rusticus和Arhopalus Syriacus（Cerambycidae）是南美洲的外星物种，但这些侵入物种的生态学都没有很好地研究。在这里，我们在昆虫物种中检测了女性大小对卵巢中卵巢成熟卵数的潜在繁殖力，大小和数量的影响。我们还将卵形态测量特征，幼虫测量，幼虫发育和生存进行了比较。我们在卵巢中的女性大小和卵数之间发现了积极的关系，但在这两个物种中的每一个中的女性大小和卵形态学特性之间没有关系。 A. rusticus的女性显着较大，并且具有比A. Syriacus的鸡蛋更大，但在它们之间的卵数中没有观察到显着差异。幼虫体长和头部胶囊外壳宽度在A. rusticus比A. Syriacus中更大。 Arhopalus rusticus具有最高的幼虫存活率，但A.Syriacus具有最短的幼虫时期。因此，女性和鸡蛋大小以及幼虫大小和生存是对A. rusticus的竞争优势。然而，A.Syriacus与A. rusticus的鸡蛋有类似数量的鸡蛋和更快的幼虫发展;这些可能是解释这两个物种共存的关键特征。

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