Entomofauna de interés forense asociada a la descomposición de Sus scrofa domesticus (Cerdo doméstico) en la Amazonía peruana

Abstract

The objective of this study is to further our understanding of the dynamics of invertebrate decomposers of forensic interest. Our goal was to determine the relative abundance, species richness and the succession of invertebrate fauna according to distinct stages of decomposition of the domestic pig (Sus scrofa domesticus). The study was performed in March of 2017 in two distinct environments. One subject was exposed in tree provided shade and the second subject was in deteriorated terrain exposed to solar radiation. We identified five stages of decomposition: fresh, bloated, active decay, advanced decay and skeletonization. A total of 5,064 invertebrates were registered, belonging to the two Orders (Diptera and Coleoptera) comprising of 14 families, 18 species and 5 morphotypes. Diptera was the most abundant in both environments with 95,52% abundance in shade and 88,49% abundance in sunshine. The following species were identified: Chrysomya albiceps, Chrysomya megacephala, Lucilia sericata, Cochliomyia macellaria, Hemilucilia sp. (Diptera: Calliphoridae), Fannia canicularis, Fannia scalaris (Diptera: Fanniidae), Musca domestica, Morphotype I (Diptera: Muscidae), Megaselia scalaris, Morphotype I (Diptera: Phoridae), Sarcophaga sp., Morphotype I (Diptera: Sarcophagidae), Dermestes maculatus (Coleoptera: Dermestidae), Euspilotus sp., and Hister sp., (Coleoptera: Histeridae), Canthon subhyalinus, Eurysternus sp. (Coleoptera: Scarabaeidae), Oxelytrum cayennensis (Coleoptera: Silphidae), Polynonchus sp. (Coleoptera: Trogidae). The invertebrate composition of forensic interest recorded in this study can be used to plot a post-mortem time frame with relative accuracy.