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The purpose of this study was to evaluate the influence of biometric parameters of fruits of Spondias mombin L. on the level of infestation by Anastrepha spp. (Diptera Tephritidae) and parasitism. The variables studied were weight, length, and the fruit diameter. Collections were carried out in the urban areas of Macapa and Santana, in the state of Amapa. We collected 30 samples of hog plum, each sample consisting of 20 fruit from a single plant (each result corresponding to a sub-sample), totaling 600 sampling units. The sampled fruit were picked up at random from the canopy and newly fallen fruit. The results indicated that both the infestation and parasitism were related to fruit weight, suggesting a preference for fruit whose biometric characteristics (weight, diameter, and length) were not extreme (either very large or very small). The preference of Anastrepha spp. for medium sized fruit may be related to their survival strategy. Larvae infesting small fruit can be more easily parasitized and, conversely, larger fruit can serve as an oviposition site for other females, increasing the potential for competition for space and food. Thus medium sized fruit can show higher rates of infestation and therefore higher parasitism rates. Keywords: Anastrepha ; host; hog plum; Amazon; fruit flies.

biota amazônia

Influência dos Parâmetros Biométricos de Frutos de Spondias mombin L. Sobre os Índices de Infestação por Anastrepha spp. (Diptera: Tephritidae) e Parasitismo