Dispersal of the Western Treehole Mosquito, Aedes Sierrensis (Diptera: Culicidae), in an Orchard Habitat

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Abstract
In spring 1976, movements of adult Aedes sierrensis were compared within and between wooded habitats during mark-recapwre experiments in a cluster of small, but discrete, orchard groves at the University of California. Davis. More than 18,000 adults were released from 38 distinctly marked cohorts. Of the 3.921 females released, 745 (5.4%) were recaptured, all by collectors acting as bait. Females moved freely between orchards separated by 60–120 m of open farmland, but dispersal rates within and between groves were different and at least panly influenced by the character of local canopy cover. Although collected most often in sheltered areas, enough female Ae. sienensis were attracted to, or transported by, collectors in exposed fields to suggest that host movements may influence rates of inter-woodlot dispersal in this species.