Income resources and reproductive opportunities change life history traits and the egg/time limitation trade-off in a synovigenic parasitoid

文献类型： 外文期刊

第一作者： Zhang, Yibo

作者： Zhang, Yibo;Zhang, Hualong;Yang, Nianwan;Wan, Fanghao;Zhang, Yibo;Wang, Jinjun;Zhang, Hualong

作者机构：

关键词： Eretmocerus hayati;fecundity;host availability;host feeding;longevity;Ovigeny Index

期刊名称：ECOLOGICAL ENTOMOLOGY （ 影响因子：2.465； 五年影响因子：2.604 ）

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收录情况： SCI

摘要： 1. Synovigenic parasitoids emerging with no or only a few mature oocytes could not rely on only capital resources, but also need to acquire income resources. Income resources in nature can either contribute to egg maturation as a food resource and/or create unpredictability in realised reproductive opportunities for synovigenic parasitoids. Therefore, we hypothesised such resources could affect life history traits and the risks of egg/time limitation in synovigenic parasitoids. 2. Using the Ovigeny Index, we investigated the effects of various host availability levels (unavailable, limited, and unlimited availability) and non-host foods (water and honey) on life history traits and on the occurrence of egg/time limitation in Eretmocerus hayati, a predominant parasitoid on Bemisia tabaci. 3. The Ovigeny Index of Er. hayati was 0.28, which suggested it was a typical synovigenic species. Both host availability levels and non-food type had major effects on life history traits of this parasitoid, but the availability of hosts for both feeding and reproduction was the key factor. Meanwhile, egg/time limitation was encountered by all wasps and its intensity varied with host availability levels. 4. Our results confirmed that the income resource and reproductive opportunity played a central role in shaping the life history and risks of egg/time limitation of a synovigenic parasitoid.

分类号： Q96

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