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Entomology > Forensic Entomology > Flashcards

Forensic Entomology Flashcards

1
Q

what is forensic entomology?

A

application of insects and arthropods as evidence in a criminal investigation

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2
Q

Who is Sun Tzu?

A

Chinese death investigator who used flies to solve a murder by releasing flies into areas which drawn scent of blood

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3
Q

Three categories of forensic entomology

A

urban forensic entomology

medicolegal forensic entomology

stored-product entomology

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4
Q

what is urban forensic entomology?

A

deals with insects that affect humans and their immediate environment- pest infestations

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5
Q

what is medicolegal entomology?

A

criminal component of the legal system that involves insect remains on dead bodies

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6
Q

5 applications of forensic entomology

A

post mortem interval

determining body relocation

traumatic injury sites

possible abuse/neglect

entomotoxicology

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7
Q

What is post mortem interval?

A

time between dearth of individual and corpse discovery, from rigor mortis to livor mortis

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8
Q

What are necrophagous insects?

A

insects that feed on corpses and will feed on bodies

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9
Q

How are blow flies used in forensic entomology? (2)

A

by tracking its six stages of life cycle from egg, three larval stages, pupa and adult

at 70 degrees, each stage takes a known amount of time to complete metamorphosis

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10
Q

Four insects that feed on the dead

A

blow flies

flesh flies

carrion bettle

rove beetle

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11
Q

scientific name of blow flies

A

calliphoridae

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12
Q

scientific name of flesh flies

A

sarcophagidae

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13
Q

scientific name of carrion beetles

A

silphidae

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14
Q

scientific name of rove beetles

A

staphylinidae

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15
Q

when was forensic entomology first applied in court?

A

France in the 1800s, when insect that was found in remains of a child was submitted

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16
Q

what is autolysis?

A

when cells begin to die and enzymes start to digest

17
Q

what attracts insects to decomposing bodies?

A

apeneumones

18
Q

what four categories of insects are found on decomposing bodies?

A

necrophagous insects feeding on the body

predators and parasites feeding on the insects

omnivorous insects feeding on both bodies and the insects

other species using the body as its environment

19
Q

How are stages of decomposition seperated?

A

physical appearance, body temperature, and insect population

20
Q

what are the five stages of decomposition?

A

fresh

bloated

decay

post decay

remains

21
Q

What occurs during the fresh stage? (4)

A

day 1-2

moment of death until bloating occurs

cell breakdown occurs and attracts insects- no egg laying at this point

no physical changes

22
Q

what occurs during the bloated stage? (6)

A

2-7 days

putrefaction occurs

gas produced swells the body

body temperature rises

greatest attraction of insects

insect larvae begin to emerge

23
Q

what occurs during the decay stage? (5)

A

5-13 days

body deflates

body temp rises and then drops

body mass decreases

more larvae emerges

24
Q

what occurs during the post-decay stage? (3)

A

10-23 days

most larvae leave the body

carcass consists of bones, cartilage, tissues, hair, and byproducts of decay

25
Q

what occurs in byproducts of decay?

A

major insect activity

26
Q

what occurs during remains stage?

A

18-90 days

BOD dries up and bones are left

insect activity decline

27
Q

How long can insects provide evidence?

A

up to 1 month

28
Q

how is PMI measured?

A

by aging the larvae by weight and comparing it to thermal temperatures of the environment

29
Q

How can insects and site of crime be correlated?

A

different species correlating with corpses are found at different habitats

30
Q

How is insect species identified?

A

by studying its genome

31
Q

what is entomotoxicology?

A

using insects that were feeding on a corpse to study any accumulated drugs a person may have had

32
Q

How does cocaine affect larvae?

A

accelerates larval development

33
Q

how does poison affect larval development?

A

delays insect colonization

34
Q
A

Blow fly

35
Q
A

Carrion beetle

36
Q
A

flesh fly

37
Q
A

rove beetle

Entomology (16 decks)

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