Synanthropy of dipterans collected in cattle feces in Brazil

Cattle feces accumulated in pastures and stables constitute an especially favorable microhabitat for the development of a rich and heterogeneous arthropod fauna. This study determined the species of Diptera of Medical, Veterinary and Agricultural importance present in forest, rural and urban areas in the municipality of Monte Alegre, state Minas Gerais Southeast region, Brazil in the period from March to November 2006. The dipterans pupae were individually placed in glass jars until the emergence of the dipterans. A total of 372 dipteran pupae were collected, 107 in the forest area, 194 in the rural area and 71 in the urban area. Percentage of dipterans in forest, rural and urban areas were 28.7%, 52.2% and 19.1%, respectively. Sorcophagula occidua (Fabricius, 1794) (Diptera: Sarcophagidae) was the most frequent species with 42.2%. Regarding the synanthropy index of the species Archisepsis scabra (Loew, 1861) (Diptera: Sepsidae) Palaeosepsis pusio (Schiner, 1868) (Diptera: Sepsidae), Brontaea quadristigma (Thomson, 1869) (Diptera: Muscidae) and S. occidua presented an index of 16.0%, - 64%, +18.4% and +7.7%, respectively. Dipterans constitute the adequate model for the study of synanthropy, not only for their ecological importance, but also for their medical-sanitary aspect.