Required Practical 10 - Movement of Maggots Flashcards

1
Q

Suggest why you were told to wipe the inside of the maze between trails

A
  • remove any substances/ scent left by the maggots

- ensure maggot behaviour is not affected

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2
Q

Describe how you might use a lamp to minimise the effect of changes in light intensity

A
  • light placed above so non-directional

- uniform light intensity so maggots do not have directional response

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3
Q

Describe how you would determine if there were temperature changes that could have affected the behaviour of maggots

A
  • measure temperature during each trial

- determine if there were any changes

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4
Q

Describe ways in which maggots should be similar

A
  • same age
  • same breed/species
  • same size
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5
Q

Suggest how to determine what sample size to use in your investigation

A
  • large enough to calculate a statistical test
  • small enough to complete in sufficient time
  • large enough so sample is representative
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6
Q

Suggest why maggots are not used more than one in investigation

A
  • reduce stress for ethical practice

- prevent learned behaviour

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7
Q

Suggest why 15 minutes are allowed before movement of maggots is recorded when investigation effect of humidity in particular

A
  • allow humidity of container to stabilise

- allow maggots to detect humidity and respond to it

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8
Q

Suggest why you cannot conclude that behaviour of maggots is caused by changing conditions

A
  • may be due to other factors

- correlation does not equal causation

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9
Q

Describe how you would use a maze to investigate whether maggots detect scent of raw meat

A
  • use T part of maze only
  • place maggots at one end and raw meat at other side
  • count number of maggots on meat after set time
  • use large sample size of maggots / statistical test
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