University of Khartoum

Effect of Some Environmental Factors on Forensic Insects using Rabbit Carcasses (Flies)

Effect of Some Environmental Factors on Forensic Insects using Rabbit Carcasses (Flies)

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Title: Effect of Some Environmental Factors on Forensic Insects using Rabbit Carcasses (Flies)
Author: Ismail, Taiseer Ali Mohamed
Abstract: Forensic entomology is the branch of forensic science in which information about insects is used to draw conclusions when investigating legal cases relating to both humans and wildlife, although on occasion the term may be expanded to include other arthropods.It gains its fame from interfering in the medico-legal application and determination of the post mortem interval (PMI). Any researches in this field will add to the knowledge of medico-legal findings.In this research I have tried to see the effect of some environmental factors on the succession of forensic flies using rabbit carcasses.These factors include shade and sun, dry and wet season and stratification.In these experiments 12 male rabbits were used (killed by cloroform) 6 for summer season and 6 for rainy season. Three heights were selected : The insectary (Animal House), The roof of the Zoology department about 8 m high and The roof of the Faculty of Science building about 19 m high.Two rabbits were placed in each height one in the shade side and the other under the sun.The carcasses were observed twice a day in the morning and afternoon, flies attracted and the day temperature were recorded.The results obtained showed that forensic flies, in this study, were represented by five dipteran families: Calliphoridae, Sarcophagidae, Muscidae, Drosophilidae and Ephydridae. And each family was represented by one genus or species, e.g. Sarcophaga tibialis, Chrysomya albiceps, Musca domestica, Drosophila melanogaster and Discomyza incurve respectively.The calliphorids which are the most important forensic flies concerned with determination of post mortem interval (PMI) appeared in both seasons at the three heights by different numbers. The maximum number of families was recorded for shaded carcasses at each height in the rainy season. This apparently means that degree of temperature and relative humidity affects the abundance of these families and ultimately affect the decomposition of the carcasses.
URI: http://khartoumspace.uofk.edu/123456789/25853


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