Forensic entomology_2

Forensic entomology_2 - Associated odor of decay c....

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a.i. Normal onset b/w 3-36 hours b. Stages of decomposition c. Insect behavior and lifecycles 2. Ecology of decomposition a. Necrophages – first species feeding on corpse tissue; true flies and beetles b. Omnivores – species such as ants, wasps, and some beetles that feed on both corpse and maggots c. Parasites and predators – beetles, true flies and wasps 3. Stages of Decomposition a. Fresh a.i. Body appears normal on body appears normal on outside, but is decaying on inside a.i.1. Bacteria a.i.2. Nematodes a.ii. Calliphorid flies a.ii.1. Bottle/blow a.ii.2. Screwworms a.iii. Arrive within first few hours a.iv. Lay eggs in orifices a.iv.1. Natural a.iv.2. mechanical b. Early decomposition b.i. Body bloated b.ii. Pressure forces fluids and by-products out b.iii.
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Unformatted text preview: Associated odor of decay c. Advanced decomposition (black putrifaction) c.i. Gases have escaped c.ii. Flesh is a creamy consistency c.iii. Odor of decay very strong c.iv. Insects = prime factor in decay c.iv.1. Mature maggots wander off to form pupae c.iv.2. Predatory maggots common c.iv.3. Increase in necrophagous/predaceous beetles and parasioid wasps d. Skeletonization d.i. Body dries out and becomes leathery d.i.1. Parts in contact with groud will mold d.i.2. Less conducive to maggots d.ii. Cheesy odor d.iii. Major insect succession d.iii.1. Dermestid beetles d.iii.2. Cheese skippers d.iii.3. Coffin fly d.iii.4. Still maintain predaceous beetles d.iii.5. And parasitoid wasps...
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This note was uploaded on 01/16/2012 for the course ENY 1001 taught by Professor Barfield during the Fall '11 term at University of Florida.

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