Resource allocation strategies for survival and reproduction by an invasive pest in response to intermittent fasting  

作　　者：Dwi RISTYADI Xiong ZHE Qiao WANG 

机构地区：[1]School of Agriculture and Environment,Massey University,Private Bag 11222,Palmerston North,New Zealand [2]Agriculture Faculty,Jambi University,Km 15 Mendalo Darat 36361,Jambi,Indonesia

出　　处：《Current Zoology》2023年第5期600-606,共7页动物学报（英文版）

基　　金：supported by a New Zealand ASEAN Scholarship(NZAS)to DR;a Massey University Research Fund(RM21456)to Q.W.

摘　　要：Intermittent fasting(IF)is a type of dietary restriction that involves fasting periods in intervals,which has been used as a strategy to improve health and extend longevity.Regular fasting is common during the process of biological invasions in nature.Yet,it is not clear how invasive animals adjust their resource allocations to survival and reproduction when periodical starvation occurs.Here,we used Tetranychus ludeni,a haplodiploid spider mite and an important invasive pest of horticultural crops around the world,to investigate the effects of IF on its life history strategies.We show that IF increased the longevity in females but not in males probably because of differences in resource storage,metabolic rate,and mating cost between sexes.In response to IF,females traded off fecundity and egg size but not the number of daughters for longevity gain,suggesting that T.ludeni females can adjust their life history strategies for population survival and growth during invasion process.Eggs produced by fasted females realized the same hatch rate and resultant young had the same survival rate as those by unfasted ones.In addition,IF had transgenerational maternal effects which prolonged offspring development period.We suggest that the longer immature developmental period can increase the body size of resulting adults,compensating egg size loss for offspring fitness.Our findings provide insight into resource allocations as responses to fasting,knowledge of which can be used for evaluation of pest invasions and for management of animal survival and reproduction by dietary regulations.

关 键 词：ACARI FASTING LONGEVITY offspring performance REPRODUCTION TETRANYCHIDAE 

分 类 号：Q95[生物学—动物学]