forensic entomology bud and patti bertino. forensic entomology is based on: insect life cycles...
TRANSCRIPT
![Page 1: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/1.jpg)
Forensic Entomology
Bud and Patti Bertino
![Page 2: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/2.jpg)
Forensic Entomology is based on:
• Insect life cycles• Knowledge of length of stage of
development• Predatory food chain on corpse• Gases produced by decomposing bodies
draw insects, not blood• These gases are carbon dioxide,
methane, ammonia and nitrogen
![Page 3: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/3.jpg)
![Page 4: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/4.jpg)
A first ‘wave’ of insects• Usually blow arrive first laying
150-300 eggs on soft tissue lining body openings on corpse• In 1-2 days, eggs hatch and
maggots feed on corpse (1st instar stage)
![Page 5: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/5.jpg)
•Maggots mature through 3 instar stages before forming a cocoon (pupa stage)•About a week later, adult flies emerge
![Page 6: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/6.jpg)
What might effect the accuracy
of the time sequence of the
life cycle of the blow fly?
![Page 7: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/7.jpg)
Blow fly arrives in less than one minute
![Page 8: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/8.jpg)
![Page 9: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/9.jpg)
Various Types of Maggots
![Page 10: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/10.jpg)
Life Cycle of the Flesh Fly
![Page 11: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/11.jpg)
Second wavecould include:
• Beetles or other insects who feed on blow flies and have a life cycle of their own
• The corpse may really be the origin of a food chain.
How does a food chain work?
![Page 12: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/12.jpg)
![Page 13: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/13.jpg)
![Page 14: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/14.jpg)
How would each of these factors affect time of death estimations?
• Burial• Immersion in water• Mummification• Geographic location
![Page 15: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/15.jpg)
![Page 16: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/16.jpg)
• Temperature & Humidity• Light & Shade• Season• Length of day• Manner of death (Poisons may slow down
decomposition)
![Page 17: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/17.jpg)
Time to get to work!
![Page 18: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/18.jpg)
Forensic examination kit
![Page 19: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/19.jpg)
![Page 20: Forensic Entomology Bud and Patti Bertino. Forensic Entomology is based on: Insect life cycles Knowledge of length of stage of development Predatory food](https://reader031.vdocuments.mx/reader031/viewer/2022020320/5697bf7a1a28abf838c82acd/html5/thumbnails/20.jpg)
Project ideas:1. Study the life cycle of a blow fly and
determine the timeline used by forensic scientists.
2. Obtain some liver and grow your own ‘time line’.
3. Search the internet for crimes that were solved through the use of forensic entomology.