Analysis of the colonization of dipteran fauna in open and closed environments in Oryctolagus cuniculus carcasses Franciellen Mouradian Emidio Teixeira, Ana Beatriz Carollo Rocha-Lima

Abstract

Insects of the order Diptera are widely used for the solution of crimes by forensic entomology, since their life cycle can be affected by biotic and abiotic factors, and through the analysis of these factors it is possible to determine the postmortem interval (PMI). This study aimed to determine the incidence and colonization of carrion insects of the order Diptera in carcasses in indoor and outdoor environment in the region of Campo Limpo Paulista and Jarinú, and thus contribute with information that may assist in forensic investigations in the region. For this, two medium-sized rabbit carcasses (Oryctolagus cuniculus) (approximately 2 kg) were arranged in an open and closed place, inside a trap to collect dipterans. The collection of mature and immature dipterans in the carcasses was performed daily and the specimens collected were fixed in 70% alcohol. Samples were taken to the laboratory Charles Darwin at Universidade Paulista - UNIP Jundiaí campus, where there was the process of screening and identification. The experiment had a duration of 18 days, and in the internal environment skeletonization of the carcass occurred on the eighteenth day and in the external environment skeletonization occurred in five days. Ten species were identified, 5 of the Calliphoridae family and 4 of the Fannidae family. According to the literature, the colonization of Calliphoridae and Fannidae families occurs mainly in the hot season and in the southwest region. The results of the present study may contribute to future forensic investigations in the region.