MODIFICATION OF THE BEHAVIOR OF FISHES 



15 



CHART IV 

 Arrows indicate that the fishes were driven 



Experiment 1 and 1A Experi- Control 84 Control 58 



Control Experiment 1 and 1A Experi- 



1, 1A ment 84 



One space equals 20 sec. Boiled 



+ 

 Tap Tap Tap Boiled Boiled Tap Boiled C0 2 Tap Tap Tap Tap 



M-X t« — 1 I L 



