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Week 2
Aplysia talk
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Aplysia Talk
This is an example of how you can structure overheads for a short oral presentation on a single experimental research paper.
Aplysia Navigation
Visual navigation
Disabled eyes
- Near shore
- Turns off shore
- Hydrodynamics, wave surge
- Off shore
- Erratic route
Experiment 1: Deflection
- 12 Aplysia
- Daylight conditions
- Florida, USA
- 475+ m off shore
- 20-60 cm deep water
- Direction at T = 15, 30, 45 sec
- Deflection at 180 deg
- Direction at T = 60, 75 sec
- Recovered post deflection direction, +/- 7 deg
Experiment 2: Celestial Cues
- 17 Aplysia
- Daylight conditions
- Florida, USA
- On shore
- 82.5 cm diameter arena
- Direction at T = 45 sec
- Move to second arena with
- no cover
- clear plastic cover
- 88-91% of 400-600 nm light
- opaque plastic cover
- 5-7% of 400-600 nm light
- Direction at 15 sec intervals for 5 min
- Conditions 1 and 2
- Maintained pre-move direction for 3 min
- Condition 3
- Random direction
Conclusions
Less surface scattering of light
- Aplysia maximally sensitive to 500 nm
Future Questions
- Wall
- Naturalistic study
Confounding variables
- e.g., air currents
Simple nervous system
Neurophysiological background