50 - 



W 40 



i^ 30 - 

 O 



tt 20 I- 



UJ 

 CO 



5 10 [- 



^ 



^ 



^ t^??7?1 



UJ 



I 

 o 



z 



I 



H 



o 



z 



UJ 



_J 



_) 

 < 



H 

 O 



I- 



I 2 3 4.5 6 7 8 

 AGE IN YEARS 



FIG. 5. — Shaded areas show numbers of largemouth bass of different 



ages taken from Sportsmen's Lake following first poisoning. 



Unshaded areas represent numbers of bass arbitrarily assigned to 



age groups on basis of size: 2 from first poisoning, 21 from second. 



16 



14 



12 



2 — 



3 4 



AGE IN 



5 

 YEARS 



FIG. 6. — Rate of growth of largemouth bass In Sportsmen's Lake. 

 Solid line, sum of length Increases; broken line, average lengths. 



13 



