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Male nutritional status does not impact the reproductive potential of female Cnaphalocrocis medinalis moths under conditions of nutrient shortage

文献类型： 外文期刊

作者： Guo, Jia-Wen 1 ; Cui, Yu 2 ; Lin, Pei-Jiong 2 ; Zhai, Bao-Ping 2 ; Lu, Zhong-Xian 1 ; Chapman, Jason W. 2 ; Hu, Gao 2 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China

2.Nanjing Agr Univ, Coll Plant Protect, Dept Entomol, Nanjing 210095, Peoples R China

3.Univ Exeter, Ctr Ecol & Conservat, Penryn TR10 9FE, Cornwall, England

4.Univ Exeter, Environm & Sustainabil Inst, Penryn TR10 9FE, Cornwall, England

关键词： bursa copulatrix; Cnaphalocrocis medinalis; insect migration; nuptial gifts; spermatophore

期刊名称：INSECT SCIENCE （ 影响因子：3.262； 五年影响因子：3.206 ）

ISSN： 1672-9609

年卷期：

页码：

收录情况： SCI

摘要： In addition to sperm, some accessory substances transferred to females during copulation act as nuptial gifts by passing on valuable nutrients in many insect species. The nutritional status of the males can thus have a great effect on the mating behavior, fecundity and even the longevity of females. However, little is known about the effect of male nutritional status on the female reproductive traits in migratory insect species, particularly when females experience nutrient shortage and have to choose between reproduction and migration. Here, Cnaphalocrocis medinalis, a migratory rice pest in Asia, was studied to explore this issue. Our results showed that in male moths fed with honey solution, their gonads had higher energy content than gonads of starved males, resulting in increased energy content of the bursa copulatrix of females after mating with fed males. Such females showed increased mating frequency, fecundity and longevity compared to females mating with starved males, indicating that male moths deliver nuptial gifts to females and improve their reproductive performance. However, when females were starved, only about 45% mated, with just a single copulation, regardless of male nutritional status. Starved females showed lower fecundity, and a longer pre-oviposition period (indicating a greater propensity to migrate), compared to fed females. However, copulation still significantly extended their longevity. These results suggest that starved females invest in migration to escape deteriorating habitats, rather than investing the nuptial gift to increased fecundity. Our results further our understanding of the reproductive adaptability of migratory insects under conditions of food stress.

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