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#1- G ROLE OF VISION IN MATING BEHAVIOR OF MALE NASONIA VITRIPENNIS

Like many insects, the parasitoid wasp Nasonia vitripennis displays stereotypic courtship behaviors characteristic of the species. These behaviors occur within minutes after the first exposure of males to females. The latent period before the male mounts the female and begins head nods that lead to female receptivity can be particularly important for male N. vitripennis because they are brachypterous and cannot follow a female that flies away. Courtship begins when a male pursues the female for a short distance and then mounts the female’s head. This is followed by cyclical repetitions of characteristic combinations of head nods, mouthpart extrusions and antennal sweeps that usually elicit female receptivity, followed by copulation. This research explores the effect of vision on courtship behavior in male N. vitripennis. The hypothesis was that N. vitripennis males lacking vision would be handicapped in the beginning of the courtship. Males were visually impaired by placing a small drop of diluted acrylic paint over their eyes. The results indicate that the time elapsed for visually-impaired males to begin courtship (N=39, mean=3.80 minutes) were significantly longer than that for control males (N=30, mean=2.60 minutes). This suggests that vision contributes to eliciting male courtship in this species.