200 



100 

 90 

 80 

 70 

 60 



^50 



LU 40 

 O 

 2 30 



O 



X 



20 

 1.5 



10 

 9 

 8 



7 

 6 



AGE DETERMINATION FROM SCALES OF LAKE TROUT 



■I I , , , , |,,,.|i...|....|....|i. M |....|.i..|..ii | iiii|i.ii|.i.i|...i, . .T U ^   '  I  '   I   



37 



' 1 ' ' " I ■' "r 



log W = -2.470 + 3.112 log L 

 or 



W= 3.390xI0'l"" 



1 I I , I I I I I ,1 ,i,iImi, iiiil ,iil , 1„ In liJ 



2 3 456789 10 20 



LENGTH (INCHES) 



30 40 



FioiRE 18. — Length-weight rehitiou of 1,197 lake trout from northern Lake Michigan. (Dots give empirical values 

 line represents values obtained from solution of the length- weight equation]. 



