The effect of different dietary sugars and honey on longevity and fecundity in two hyperparasitoid wasps
The effect of different dietary sugars and honey on longevity and fecundity in two hyperparasitoid wasps
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DOI：
10.1016/j.jinsphys.2012.03.002
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发表时间：
2012-06-01
影响因子：
2.2
通讯作者：
Gols, Rieta
中科院分区：
文献类型：
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作者：
Harvey, Jeffrey A.;Cloutier, Josianne;Gols, Rieta
在自然界中，寄生蜂或“类寄生蜂”等成虫往往依赖补充营养来源，如糖和其他碳水化合物，以最大限度地延长它们的预期寿命和生殖潜力。这些食物通常是从动物分泌物或植物渗出物中获得的，包括蜜露、果汁以及花和花外花蜜。除了外源性营养来源外，成虫还通过“取食宿主”行为从宿主获得内源性营养来源，即从宿主吸收血液。从宿主获得的资源含有脂质、蛋白质和糖，被认为可以延长寿命和/或繁殖力。在这里，我们进行了一项实验，探索天然存在的糖对独居超寄生物Lysibia nana和Gelis agilis的寿命和繁殖力的影响。虽然这两个物种有密切的关系，但nana不以宿主为食，而g.a ilis则以宿主为食。在另一项实验中，我们比较了用蜂蜜、一种蜂蜜糖“模拟物”和葡萄糖饲养的g.g ilis的繁殖和寿命。两种高寄生蜂的繁殖成功率和寿命在摄食不同糖类时差异显著。然而，只有甘露糖和水喂养的黄蜂比其他四种糖喂养的黄蜂表现得更差。喂食蜂蜜的雌性敏捷蛛的后代数量是喂食蜂蜜-糖模拟物或葡萄糖的雌性的两倍，而雌性的寿命仅在喂食模拟物混合物时减少。这一结果表明，不仅寄主的摄食会影响蜜蜂的繁殖成功，蜂蜜中的非糖成分也会影响蜜蜂的繁殖成功。讨论了蜂蜜中非糖营养物质对寄生蜂繁殖的重要性。(C) 2012 Elsevier Ltd.版权所有。
In nature adult insects, such as parasitic wasps or 'parasitoids' often depend on supplemental nutritional sources, such as sugars and other carbohydrates, to maximize their life-expectancy and reproductive potential. These food resources are commonly obtained from animal secretions or plant exudates, including honeydew, fruit juices and both floral and extra-floral nectar. In addition to exogenous sources of nutrition, adult parasitoids obtain endogenous sources from their hosts through 'host-feeding' behavior, whereby blood is imbibed from the host. Resources obtained from the host contain lipids, proteins and sugars that are assumed to enhance longevity and/or fecundity. Here we conducted an experiment exploring the effects of naturally occurring sugars on longevity and fecundity in the solitary hyperparasitoids, Lysibia nana and Gelis agilis. Although both species are closely related, L. nana does not host-feed whereas G. agilis does. In a separate experiment, we compared reproduction and longevity in G. agilis reared on either honey, a honey-sugar 'mimic', and glucose. Reproductive success and longevity in both hyperparasitoids varied significantly when fed on different sugars. However, only mannose- and water-fed wasps performed significantly more poorly than wasps fed on four other sugar types. G. agilis females fed honey produced twice as many progeny as those reared on the honey-sugar mimic or on glucose, whereas female longevity was only reduced on the mimic mixture. This result shows not only that host feeding influences reproductive success in G. agilis, but also that non-sugar constituents in honey do. The importance of non-sugar nutrients in honey on parasitoid reproduction is discussed. (C) 2012 Elsevier Ltd. All rights reserved.