LARVAL DISPERSION OF ORMIA-DEPLETA (TOWNS) (DIPT, TACHINIDAE)

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1993-01-01

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Blackwell Wissenschafts Verlag Gmbh

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The dispersion patterns of the larval planidia of Ormia depleta was studied in circular arenas. After placing 25 larvae in the center of the arena, their angle of distribution and distance travelled was recorded 15 min later. No innate directional orientations were evidenced, nor was evidence found for either positive or negative orientation to point sound and light sources. In all cases, dispersion was bimodal, with most dispersing only 1 cm, and a much smaller peak found at 10 cm. The bimodality of dispersal distances may be a response to the sexual behavior of its host, mole crickets of the genus Scapteriscus.

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Journal of Applied Entomology-zeitschrift Fur Angewandte Entomologie. Berlin: Blackwell Wissenschafts-verlag Gmbh, v. 115, n. 1, p. 107-110, 1993.