Size-dependent flight capacity and propensity in a range-expanding invasive insect  

作　　者：Chelsea Jahant-Miller Russell Miller Dylan Parry 

机构地区：[1]Forest Health Protection,U.S.Forest Service,Coeur d’Alene,ID,83815,USA [2]School for Environment and Sustainability,Cooperative Institute for Great Lakes Research,University of Michigan,Ann Arbor,Ml,48106,USA [3]Department of Environmental and Forest Biology,College of Environmental Science and Forestry,State University of New York,Syracuse,NY,13210,USA

出　　处：《Insect Science》2022年第3期879-888,共10页昆虫科学（英文版）

基　　金：Funding was provided by Macrosystems Biology(Grant 1702701 to Kristine Grayson,Sal Agosta,and Dylan Parry);Gypsy Moth Slow-the-Spread Foundation,Inc(Grant 19-01-13 to DP).

摘　　要：For capital-breeding insects,all resources available for adult metabolic needs are accumulated during larval feeding.Therefore,body size at adult eclosion represents the total energetic capacity of the individual.For female capital breeders,body size is strongly correlated with lifetime fecundity,while in males,body size,which correlates with fitness,is less understood.In capital-breeding species with wingless,flightless,or dispersal-limited females,flight potential for male Lepidoptera has important implications for mate-finding and may be correlated with body size.At low population densities,failure to mate has been identified as an important Allee effect and can drive the success or failure of invasive species at range edges and in species of conservation concern.Th capital-breeding European subspecies of Lymantria dispar(L.),was introduced to North America in 1869 and now ranges across much of eastern North America.In L.dispar,females are flightless and mate-finding is entirely performed by males.We quantified male L.dispar flight capacity and propensity relative to morphological and physiological characteristics using fixed-arm flight mills.A range of male body sizes was produced by varying the protein content of standard artificial diets while holding other dietary components constant.Wing length,a proxy for body size,relative thorax mass,and forewing aspect were all important predictors of total flight distance and maximum speed.These results have important implications for mate-finding and invasion dynamics in L.dispar and may apply broadly to other capital-breeding insects.

关 键 词：flight mill Lymantria dispar LIFE-HISTORY invasion dynamics selective pressure 

分 类 号：Q96[生物学—昆虫学]