Abstract
This study investigated the effects of three temperature regimes representing several specific development conditions of this blowfly: (25.7, 28.4and 30.6oC) and tissue types. Furthermore, Chrysomya megacephala colonies were reared on three different food sources (all rabbit carcasses, Liver and muscles) on the development of C.megacephala as important forensic fly, and their possible implications to calculate the postmortem interval (PMI). The results showed that the mean durations period from egg to adult eclosion of C. megacephala when reared on control rabbit at 25.7, 28.4 and 30.6 oC were 303.5, 217 and194.5 hrs, respectively. In addition, the mean duration period from egg to adult eclosion when the larvae reared on liver tissue at 25.7, 28.4and 30.6oC were 275.5, 205.5 and 188.5 hrs, respectively. Moreover, The Larvae of C.megacephala reared on muscle tissues from rabbit carcasses, the mean duration from egg to adult eclosion at 25.7oC 28.4oC, and 30.6oC were 293, 214.5 and 192.5 hrs, respectively. From the previous results, it is obvious that the mean duration in larvae reared on control rabbit carcasses was longer than those fed on muscle which longer than those reared on the liver at all temperature regimes.
Highlights
Knowledge of the distribution, biology, and behavior of insects found at a crime scene can provide information on when, where and how the crime was committed (Hall, 2008)
Forensic entomologists estimate the minimum time between death and discovery of a corpse (PMI) mainly in terms of the parameters of body size and developmental stages of blowflies which are found in or on a corpse (Li et al, 2014)
The purpose of this study was to determine the effect of temperature regimes and tissue types on the development and growth of C. megacephala larvae as well to verify the time of emergence of adults that can affect the estimation of postmortem interval
Summary
Biology, and behavior of insects found at a crime scene can provide information on when, where and how the crime was committed (Hall, 2008). Forensic entomologists estimate the minimum time between death and discovery of a corpse (PMI) mainly in terms of the parameters of body size and developmental stages of blowflies which are found in or on a corpse (Li et al, 2014). Some death that occurs by poisoning remains undiscovered until the body is wholly or partially skeletonised In such cases, the analysis of toxicology using body fluids and tissues is almost impossible. Warmer temperatures accelerate development while cooler temperatures have an inverse impact This relationship has been documented in past growth studies on blowflies at varying temperatures Byrd and Allen (2001). The purpose of this study was to determine the effect of temperature regimes and tissue types on the development and growth of C. megacephala larvae as well to verify the time of emergence of adults that can affect the estimation of postmortem interval
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