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Flashcards in Forensic entomology Deck (8):

Explain the fly cycle

Pupa to young adult to mature egg laying female to egg to 1st stage larvae to 2nd stage larvae to 3rd stage larvae back to pupa


What are fly/beetles successions?

Beetle larvae posses a hard, head capsule, brown in colour and have 6 legs. Maggots are legless


What are important species in decomposition and when do they appear?

Blow flies (first), Flesh flies (Early/later stages decomp), House flies (later stages decomp), Carion bettles (wet stage decomp), Clown beetles (First beetles), Rove beetles (Wet stage decomp), Skin beetles (late decomp)


What is the accumulated degree days and how is it calculated?

Amount of development occurring in 1 day when temperature is 1 degree above lower development threshold. To calculate growing degree day- take ave temp-threshold temp X 24 to give ADH


What are the achievements of Forensic entomology?

PMI- species succession, insect life cycle, larval weight, larval lengh, species preference, ADD


What is circumstantial evidence?

Evidence that requires something to corroborate it


What is the collection and preservation method for forensic entomology?

Insect net, Collection jars (different larval stages, adults flies, beetles), Kill insect/adult flies by freezer or alcohol, larvae kill by boiling, collect adults first, collect various species and various stages and preserve in 75% ethyl alcohol


What are the limitations of forensic entomology?

PMI estimated on accurate temperature (may be wrong), must have insect abundance, cannot produce answers immediately, identifying maggots is hard, wrapping/graves may keep beetles away, treatment exclude insects (freezing/burial) and presence of drugs will affect