title: Dispersal behavior of yellowjacket (Vespula germanica) queens.
abstract: Understanding the factors that affect animal dispersal behavior is important from both fundamental and applied perspectives. Dispersal can have clear evolutionary and ecological consequences, but for nonnative insect pests, dispersal capacity can also help to explain invasion success. Vespula germanica is a social wasp that, in the last century, has successfully invaded several regions of the world, showing one of the highest spread rates reported for a nonnative insect. In contrast with nonsocial wasps, in social species, queens are responsible for population redistribution and spread, as workers are sterile. For V. germanica, it has been observed that queen flight is limited to 2 distinct periods: early autumn, when new queens leave the nest to mate and find sheltered places in which to hibernate, and spring when new colonies are founded. Our aim was to study the flight behavior of V. germanica queens by focusing on the different periods in which dispersal occurs, characterizing as well the potential contribution of queen flight (i.e., distance) to the observed geographical spread. Our results suggest that the distances flown by nonoverwintered queens is greater than that flown by overwintered individuals, suggesting that the main queen dispersal events would occur before queens enter hibernation. This could relate to a behavioral trait of the queens to avoid the inbreeding with related drones. Additionally, given the short distances flown and remarkable geographical spread observed, we provide evidence showing that queen dispersal by flight is likely to contribute proportionately less to population spread than human-aided factors.
authors.affiliation: CONICET, CCT Comahue, Bariloche, Argentina.|INTA, Grupo de Ecología de Poblaciones de Insectos, INTA EEA Bariloche, Argentina.
authors.forename: Maité
authors.initials: M
authors.lastname: Masciocchi
authors.affiliation: CONICET, CCT Comahue, Bariloche, Argentina.|INTA, Grupo de Ecología de Poblaciones de Insectos, INTA EEA Bariloche, Argentina.
authors.forename: Andrés S
authors.initials: AS
authors.lastname: Martinez
authors.affiliation: CONICET, CCT Comahue, Bariloche, Argentina.|INTA, Grupo de Ecología de Poblaciones de Insectos, INTA EEA Bariloche, Argentina.
authors.forename: Ana J
authors.initials: AJ
authors.lastname: Pereira
authors.affiliation: INTA, Grupo de Ecología de Poblaciones de Insectos, INTA EEA Bariloche, Argentina.
authors.forename: José M
authors.initials: JM
authors.lastname: Villacide
authors.affiliation: CONICET, CCT Comahue, Bariloche, Argentina.|INTA, Grupo de Ecología de Poblaciones de Insectos, INTA EEA Bariloche, Argentina.|Centro Regional Universitario Bariloche, U. N. del Comahue, Bariloche 8400, Argentina.
authors.forename: Juan C
authors.initials: JC
authors.lastname: Corley
mesh_terms: D063147:Animal Distribution; D000818:Animals; D005260:Female; D005426:Flight, Animal; D014863:Wasps
keywords: German wasps; flight potential; hibernation; invasive wasps; social insect