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PUBMED FOR HANDHELDS

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  • Title: Post-feeding larval behaviour in the blowfly, Calliphora vicina: effects on post-mortem interval estimates.
    Author: Arnott S, Turner B.
    Journal: Forensic Sci Int; 2008 May 20; 177(2-3):162-7. PubMed ID: 18243615.
    Abstract:
    Using the rate of development of blowflies colonising a corpse, accumulated degree hours (ADH), or days (ADD), is an established method used by forensic entomologists to estimate the post-mortem interval (PMI). Derived from laboratory experiments, their application to field situations needs care. This study examines the effect of the post-feeding larval dispersal time on the ADH and therefore the PMI estimate. Post-feeding dispersal in blowfly larvae is typically very short in the laboratory but may extend for hours or days in the field, whilst the larvae try to find a suitable pupariation site. Increases in total ADH (to adult eclosion), due to time spent dispersing, are not simply equal to the dispersal time. The pupal period is increased by approximately 2 times the length of the dispersal period. In practice, this can introduce over-estimation errors in the PMI estimate of between 1 and 2 days if the total ADH calculations do not consider the possibility of an extended larval dispersal period.
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