15 WIN. CONTROL 



57 



68 



49 



14 



15 M IN. -65,000 C.RS. 



56 



594 SOS 1 



401 



59 



15 MIN. CONTROL 



60 



I 665 I 97 



71 



59 



100 



10 MIN. CONTROL 



62 



34 



84 



76 



74 



Figure 18. Distribution of fish In pens, experiments 57-62. All experiments 

 started with 1,000 fish in pen No. 1 {^r left). In controls, gates between 

 pens lefted for indicated period, then lowered. Tests same, except sounds of 

 Indicated durations and frequencies (cycles per second) applied at indicated 

 location while f^ates up. Numbers and dark bars show distribution of fish 

 after gates lowered. 



22 



