Insects Flashcards

1
Q

Metamorphosis

A
  • Shape change in post embryonic development

- Separate growth from reproductive stages

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2
Q

Feeding strategies

A

-ability to exploit highly specific resources e.g saprophages (scavenging decaying material)

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3
Q

Sophisticated behaviour

A

censory and neuro-motor systems
response to environmental stimuli
complex patterns developed

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4
Q

Small size

A

more room, +ve = loss of water more rapid/heat
power/weight ratio =high
surface area/volume ratio

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5
Q

Strength due to

A

Chitin - physically tough and chemically resistant

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6
Q

Wings

A

Ability to escape earthbound predators/ unsuitable habitats

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7
Q

Life Cycles

A

Rapid, fecundity - short generation time

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8
Q

Forensic Entomology

A

Able to estimate time of death or post mortem interval (PMI) from insects present

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9
Q

Succession: first 3 months

A

Blow flies (feed on liquefied food) -use chemical detection

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10
Q

Succession: 3-6months

A

Dermestid beetles (fats are rancid)

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11
Q

Succession: 4-8months

A

various flies and beetles (Ammonia and fermentation)

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12
Q

Succession: 6-12months

A

Mites

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13
Q

Succession: 1-3 years

A

Dermestid beetles (corpse completely dry)

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14
Q

Succession: 3+years

A

Beetles

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15
Q

Insect succession extremely variable depending on conditions

A

-Larvae grown and hatched to identify exact species
-some preserved in exact state
-

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16
Q

summary

A
  • found in nearly every habitat
  • eat almost anything
  • behave in complex manners
  • can fly
  • rapid life cycle and short generation time
17
Q

forensic entomology

A
  • insects accumulate on and around a body

- able to estimate time of death or post mortem interval (PMI) from insects present