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

作　　者：Jia-Wen Guo Yu Cui Pei-Jiong Lin Bao-Ping Zhai Zhong-Xian Lu Jason W.Chapman Gao Hu 

机构地区：[1]State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products,Institute of Plant Protection and Microbiology,Zhejiang Academy of Agricultural Sciences,Hangzhou,310021 China [2]Department of Entomology,College of Plant Protection,Nanjing Agricultural University,Nanjing,210095 China [3]Centre for Ecology and Conservation,and Environment and Sustainability Institute,University of Exeter,Cornwall,Penryn,TR109FE UK

出　　处：《Insect Science》2022年第2期467-477,共11页昆虫科学（英文版）

基　　金：supported by the National Key Research and Development Program of China(2016YFD0300702);the Fundamental Research Funds for the Central Universities(China)(KJYQ201902,KJJQ201803).

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.

关 键 词：bursa copulatrix Cnaphalocrocis medinalis insect migration nuptial gifts SPERMATOPHORE 

分 类 号：Q96[生物学—昆虫学]