Abstract
The different collected insect species were distributed on the carcasses according to the decomposition stages or postmortem intervals (PMI). In the winter season, the insect succession showed that carcasses placed outdoor attracted the greatest numbers and highest diversity of insect species. The calliphorid fly; Chrysomya albiceps was first attracted to the bloated and decay stages. In both habitats (outdoor and indoor), the numbers and diversity of insect species on carcasses were decreased during the advanced decay stage and then increased again during the dry stage. In the spring season, Chrysomya albiceps was the first fly attracted to the fresh or bloated stage of dog carcass in both habitats. Moreover, calliphorid flies were disappeared during the advanced decay stage in both habitats. While Coleopteran insects appeared during the decay and advanced decay stages. In the summer season, the forensic insect species showed nearly the same distribution of the different decomposition stages. Also, Chrysomya albiceps was the first fly attracted to the early stages of decomposition. In general, it appeared that the diversity and numbers of forensic insect species, which colonize dog carcass, were increased outdoor and decreased indoor. In the autumn season, carcasses placed outdoor attracted the greater numbers and higher diversity of forensic insects. The calliphorid fly, Chrysomya albiceps,and housefly, Musca domestica were first attracted to the fresh and bloated stages, especially of carcasses placed outdoor. The adult beetles, Dermestes maculatus, Necrobia rufipes and Hister sp.were early seen during bloated, decay and advanced decay stages.
Highlights
The decomposition of terrestrial animals, including humans, involves the actions of organisms such as bacteria and fungi and those of a large number of arthropod species, the saprophagous insects (Nuorteva et al, 1974)
The most valuable use of forensic insects associated with the corpse is the estimation of the postmortem interval or the time that elapsed since death (Hall, 2001)
The present study aimed to investigate the entomofauna associated with certain animal carcass as a human model, and its succession pattern in relation to decomposition stages of carcass, type of carcass and size, climatic conditions, and habitat
Summary
The decomposition of terrestrial animals, including humans, involves the actions of organisms such as bacteria and fungi and those of a large number of arthropod species, the saprophagous insects (Nuorteva et al, 1974). The rate at which decomposition progress is further influenced by a variety of environmental factors, including temperature, humidity, precipitation, and the degree of isolation, and by the composition of the carrion- associated fauna and the circumstances of death (Smith, 1986). The most valuable use of forensic insects associated with the corpse is the estimation of the postmortem interval or the time that elapsed since death (Hall, 2001).
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