Experiment to investigate Response to Light in Blowfly Maggots
Assessment
Data Collection / Data Analysis and Evaluation
Aim
To investigate quantatively the movements of maggots in response to light.
This experiment will analyse the behavour of maggots in response to light and water.
Can the maggot eye detect differences in colour?
Hypothesis
Maggots have a simple eye and can respond to light. In order to conserve bodily fluids and to keep away from predators they will move away from light. Are they sensitive to colour? With a simple eye it is probable that they will not be able to see colour.
Direct sunlight will dry them out. They may also be sensitive to humidity and able to move towards water.
Method
Put 10 maggots into a choice chamber, Five in the light side and five in the dark side.
Count the number in the light and dark every minute for ten minutes. (you may wish to shorten this time if the experiment works more quickly...remember fair testing though.)
Results
| Time (mins) | Shaded Side (darker) | Bright Side (light) |
| 0 | ||
| 0.5 | ||
| 1 | ||
| 1.5 | ||
| 2 | ||
| 2.5 | ||
| 3 | ||
| 3.5 | ||
| 4 |
Plot graphs and describe the pattern in your results.
Is it a Taxis or Kinesis?
Is it a Positive or negative photo response?
Conclusion
What did you find out?
Evaluate your experimental procedure for accuracy.
Make suggestions to improve the experiment.