EFFECT OF ELECTRICAL PARAMETERS ON YOUNG SALMON 



227 



Elecrrode Row 

 A 



T • • • 



2 

 •--2'— ••l'-|-l'-« 

 I '6" 



; 



I' 



I' 



• • • 



10' 



10' 2" 



5'6" 



Figure 6. — Staggered electrode array with spacing as 

 indicated. (Heavy dots represent the electrodes.) 



Figure 9. — Block diagram of sequential switching equip- 

 ment used to supply half sine-wave pulses, 



Wiring Pottern I 



Figure 7. — Square-wave (A) and half sine-wave (B) 

 pulses. 



manner that five electrical fields were produced. 

 These fields will be discussed later in the text. 



Pulse frequency. — Frequencies of 15 and 30 

 pulses per second were tested. Since both wiring 

 patterns produced five electrical fields, each field 

 was pulsed either three or six times per second, 



STARTER 



a 



OVERLOAD 



MOTOR 

 GENERATOR 



OVERLOAD 

 PROTECTOR 



2 Pulse 

 Supply 

 Cobles 



3 



Wiring Potlern II 



Figure 10. — Wiring patterns used in the experiment. 

 (Heavy dots represent the electrodes.) 



depending on the frequency being used, i.e., fre- 

 quency divided by number of electrical fields. 



Sequential pulsing — Wlien the array was wired 

 according to wiring pattern I (fig. 10) and ener- 

 gized with square-wave pulses, the polarity of the 



PULSING 

 UNIT 



CONTROL 



a 



SEO SW 



Figure 8. — Block diagram of sequential switching equipment used to supply square-wave pulses. 



