Biodiversidade de Muscidae (Diptera), Braconidae (Hymenoptera) e Chrysopidae (Neuroptera) (Insecta) nas serras de Carrancas, Cipó e Canastra, MG

Abstract

This work was aimed to perform the survey and to know both the inventorial and differential diversities of muscids (Diptera), braconids (Hymenoptera) and chrysopids (Neuroptera) (Insecta), in the phytophysionomies: forest, savanna area and rupestrian field on the Cipó and Canastra ranges, Minas Gerais, Brazil. The collections were performed in the months of July/August of 2004 (winter) and January/February of 2005 (summer). Both muscids and braconids were sampled by Malaise traps which, in the number of nine, were mounted in each of the study areas, that is, three per phytophysionomies, the first one placed at 30 meters ways from the border and the others at 50 meters apart from each other, towards the interior of the study area. The sampling of Chrysopidae consisted in the search for adult insects over the 72-hour period in the same periods and phytophysionomies, where both the braconids and muscids were collected. The captured specimens were carried into the Material Reception and Screening Laboratory of the Entomology Department of the Federal University of Lavras, where they were quantified and mounted. Those ones belonging to the families Muscidae and Braconidae were taken to the identification in the laboratories of the UFPR and UEL, respectively. Out of the 478 captured specimens, the ones belonging to the family Chrysopidae were the most abundant, but, among the braconids, a greater wealth was found. In open plant associations was found increased wealth and abundance and on the Cipó Range, a greater diversity among the groups studied was observed. Increased similarity was noticed as related to the plant association. On the basis of wealth estimators, it is supposed that with increasing sampling effort, new species could be added. Environmental preservation areas fulfill their role in biodiversity conservation.