Dipterofauna associada às massas fecais de bovinos em Campos dos Goytacazes- RJ

Abstract

The decomposition of manure is of great importance for the productivity of dairy cattle grazing systems and for the control of parasitic diseases in herds. This process is largely developed by the arthropod community, and among these, dipterans are an important group. In Brazil, there are few studies dedicated to the subject, although there are important economic losses in Brazilian livestock related to the parasitism by flies that develop in the bovine manure. Thus, the main one this study was to inventory the main species that compose the dipterofauna of bovines dung pats and how the community behave throughout the different seasons. For this purpose, nine dairy farms of Campos dos Goytacazes were visited every three months, distributed in three different biogeographical regions (Mountains, Tabuleiros and lowlands), where six fecal masses of different ages (eight and 12 days of age) were collected. exhibition). The fecal masses were immediately taken to the laboratory, where, for the extraction of pupae of the dipterans, the flotation method was used. After adult emergence, these were identified. Members of the families Sepsidae, Muscidae, Sphaeroceridae, Aulacigastridae, Stratiomyidae and Sarcophagidae were found. The most important species were Archisepsis excavata, Gymnodia quadristigma, Archisepsis scabra, Musca domestica, Gymnodia normata, Coproica sp. and Cyrtoneuropsis pararescita. In general, there were greater emergence of dipterans in the fall. The structure of the dipterous community also changed along gradients elaborated from productive factors linked to the intensification of milk production systems, such as yield, pasture stocking rate, concentrated feed intake and the presence and absence of irrigation