Effects of Salt Water and Elevation of the Corpse on the Rate of Decomposition and Subsequent Insect Succession

Abstract

The post-mortem decomposition and corresponding insect succession is a continuous process, which commences from the moment of death, until skeletonisation. Many studies have been carried out looking at these processes, and what may have an effect upon them. The effect of salinity levels in water and elevation have on a corpse is very rarely touched upon at all. With the field of forensic entomology growing in popularity with law enforcement agencies all the time, more studies need to be undertaken. This study is designed to investigate the effects that elevation of the corpse and salinity level have on decomposition rates, whilst comparing insect biodiversity and population levels of insects on the individual corpses. So far no research has been carried out in this particular area of the field. Three pig corpses were left to decompose in the open air and therefore exposed to the insect population. One corpse was elevated, limiting its contact with the ground. A second corpse was soaked in a salt water solution, whilst a third corpse was used as a control. Insects were sampled and pictures were taken for a 43-day period during the months of March and April, in Leicestershire, England. The results indicate that insect succession and the rate of decomposition are both affected respectively with regards to salinity and elevation level.