80 



83 



5 MIN.-80 LB. 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.--E)istribution of fish in pens, experiments 79-84. 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 indicated location. Numbers and dark bars 

 show distribution of fish after gates lowered. 



24 



