Résumé:
Work on forensic entomology is fragmentary and limited in Algeria. Knowing its
importance in forensic science, this study contributestothe improvement of the
knowledge on the biodiversity of the scavenging fauna and a better understanding of the
activity of Diptera, Calliphoridae during the four seasons of the year for this family is
considered the most important in dating the Interval Post Mortem (IPM).
For these experiments, four dog corpses (Canis) have been used as substrates,each in a
different season of the year 2012/2013.The study was conducted in an open space near
the laboratory of Biosystematics and Ecology of Arthropods in ChaabatErsas (36 °
20'16.20 ""N; 6 ° 37'33.32"" E) Constantine, Algeria.
One hour after the dogs’ euthanasia, they have been put in a cage covered with an iron
fence to protect them from predators.From this moment, daily samples of the adult
necrophagous insects present on the corpses and thereabouts have been taken.
Daily sampling allowed us to harvest a total of 2132 necrophagous insects belonging
mainly to three types namely that of Diptera (43.99%), Coleoptera (55.44%) and
Hymenoptera (0.56%). ). 23 necrophagous species have been listed.
The analysis of the results reveals that the fauna collected on the corpse in Spring is the
most diversified compared to the other three seasons, and that the Diptera Calliphoridae
belonging to the genera Lucilia and Chrysomia (green flies) are more adapted to the
heat, unlike those belonging to the genus Calliphora (blue flies) which are better
adapted to the cold.
Moreover, the obtained results reveal that the colonization of the substrate by
necrophagous insects varies depending on the seasons and therefore the climatic
conditions.
