Habitat Preferences and Dispersal Patterns in Native Female Screwworm Flies (Diptera: Calliphoridae)

Author: MANGAN ROBERT L.   THOMAS DONALD B.  

Publisher: Entomological Society of America

ISSN: 1938-2901

Source: Annals of the Entomological Society of America, Vol.82, Iss.3, 1989-05, pp. : 332-339

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Abstract

Habitat preferences and dispersal patterns of female screwworm, Cochliomyia hominivorax (Coquerel), flies were studied in tropical habitats in Mexico and Belize. Flies were captured and released in two contrasting habitat types, open pasture and dense forest, situated such that movements within and between habitats could be measured. Flies were abundant at both study areas, and about one third of marked flies were recaptured at least once. For original captures and subsequent recaptures, there was a clear preference for forest habitats. Dispersal behavior of flies was significantly related to habitat type; flies in open habitats tended to disperse greater distances than those within forested habitats. There was a net movement of flies from pasture into forest habitats. These data indicate that surveys or studies should consider forested habitats as preferred sampling locations.