86 Carrying Capacity, Productivity, and Growth 



A 



Figure 4.6. Abnormal growth rings on fish scales. A. Yearling 

 blueliU from Fork Lake, 1938 year-class, taken September 22 

 1939, age 16 months, showing well-defined annulus (I) and talse 

 annulus (F). The false annulus was formed on this scale about 

 July. B. Largemouth bass, 10.1 inches, weight 0.49 pound, female 

 taken April 20, 1941, before the 1941 annulus had formed. This 

 is a 1938 year-class fish in which the 1939 annulus (I) and he 

 1940 annulus (11) are separated only in the anterior field ot the 

 scale. 



