CHEMORECEPTION: LOCOMOTION AND ORIENTATION 



295 



30 



-20 



a> 



"o 

 o 



o 



10 







_L 



A- 



Scyllorhinus stellar is 

 September 10- 12, 1964 

 before stimulation 

 n= 2056 



j_ 



2 3 4 5 6 7 8 

 Jumps 



Figure 16 Scyliorhinus stellaris: frequency distribu- 

 tion of the number of compartments bypassed 

 ("jumps"), as a percentage of all entries, prior to stimu- 

 lation. From Kleerekoper (1967). 



30r- 



in 



c 20 



C 



o 



k. 

 a> 

 0. 



10 - 









Must el us mustelus 

 October 29,1964 

 before stimulation 



n= 1492 



I 2 3 4 5 6 7 8 

 Jumps 



Figure 17 Mustelus mustelus: frequency dis- 

 tribution of the number of compartments by- 

 passed ("jumps"). From Kleerekoper (1967). 



time, they were also verified in the teleost Diplodus sargus, which has a 

 highly pronounced handedness and jump preference, suggesting species speci- 

 ficity of the bias magnitudes. &These results led to the postulate that loco- 

 motion, even when not oriented, is not the outcome of a random sequence 

 of independent locomotor actions (turns, steps, velocities), unsystematic in 

 their occurrence, magnitudes, and temporal relationships, but of an orga- 

 nized, systematic array of such actions under the control of the central 

 nervous system. Initially, supporting evidence for the above postulate was 

 sought in studies on the locomotor behavior of the goldfish by the advanced 

 techniques afforded by the second monitor system (a square matrix of 

 photocells). In a series of reports (Kleerekoper et al. 1969, 1970; VVestlake 



