The movement and dispersal or Aeaes awopictus emerging at a cemetery to surrounding vegetation areas

摘要

Cemeteries are suitable habitats for Aedes albopictus. The dispersal of adults emerging at a cemetery was studied by a mark-release-recapture experiment during the period July 11-15,2016 in Okayama, Japan. Larvae and pupae of Ae. albopictus were collected from artificial containers found in the cemetery, reared to the adult stage, and used for the experiment. A total of 818 females and 810 males were sprayed with a 0.5% solution of Rhodamine B and released from a release site in a vegetation area surrounding the cemetery. Recapture of released ^4e. albopictus was conducted for 4 days, by human-bait sweep net collection, at 21collection sites located in vegetation areas. The recapture rate of females and males was 19.2% and 4.3%, respectively. The longest distance travelled by female and male mosquitoes observed1day post release was 99 m and 231m, respectively. The coefficient of determination indicated that the variation in the number of recaptured females among collection sites was explained 58 and 63% by the distance from release site. The flight range of Ae. albopictus was considered to be100 to 300 m in the urban area with vegetation.