Intercanyon Movement of Marked Culex Tarsalis (Diptera: Culicidae)1

Abstract

Field-collected Culex tarsalis mosquitoes were marked and released in each of 3 adjacent canyons in California, USA, to study population exchange. Males failed to disperse from the canyon in which they were released. Females moved freely among the canyons; immigrants were more likely to have mated prior to recapture than nonmigrants. Parity rates were generally lower for females collected in shelters than for those in CO₂-augmented trap collections; a high degree of autogeny may have resulted in undersampling of nullipars in traps.