80 



83 



5 MIN- 80 L8. AIR / 150 LB. WATER 



5 MIN.- NO AIR/ 90 LB. WATER 



5 MIN.- NO AIR / 150 LB. WATER 



5 MIN.- NO AIR/ 150 LB. WATER 



Figure 25. Distribution of fish in pens, experiments 79-8U. All experiments 

 started with 100 fish in each pen. In controls, gates between pens lifted for 

 indicated period, then lowered. Tests same, except sounds under indicated 

 operating conditions applied for Indicated time at ir-.dicated location. Num- 

 bers andchrk bars show distribution of fish after gates lowered. 



29 



