312 



CHEMICAL SENSES 



100 



to 



z 

 <r 



60 



U. 



o 



>- 

 u 



z 



UJ 

 3 

 O 

 UJ 



or 

 u. 



20 



EXP 607 

 FLOW 



QUADRANT 4 



(a) Flowing water. 



100 



V) 



z 

 cr 



3 



& 60 



>- 

 O 



z 



UJ 



3 

 O 

 UJ 



cr 



20 - 



EXP 609 

 NO FLOW 



QUADRANT 



X 



2 3 4 



SOURCE 



(b) Stagnant water. 



Figure 29 Ginglymostoma cirratum: frequency of turns vs 

 the site of stimulus release in quadrants 1 and 4 of the 

 monitor tank. From Kleerekoper et al. (1975). 



