-42- 



Table 10, Largemouth bass growths at Heyburn and Upper Spavinaw compared with 

 growths made in other new Oklahoma reservoirs „ 



1 Unpublished data on file at the Oklahoma Fisheries Research Laboratory. 



2 Data from Oklahoma Fisheries Research Laboratory Report No, 32, October, 1953. 



3 Growths at Canton and Wister were based on calculated body-scale relationships 

 and probably average slightly higher in the younger age groups than if calculated 

 by the direct proportion method used in all other samples. These and the Clear 

 Creek data were taken from Jenkins and Hall (1953), 



J 



Of 56 bass collected in 1954, 64 percent were in their fourth year or older, 32 

 percent were in their third year, and only one yearling fish was taken. The 

 seunples were mostly taken by rotenone, \mdoubtedly the least selective of any 

 available method. In 1955, 35 bass were aged of iriiich 23, or approximately two- 

 thirds, were in their third year or older and only 12 were second-year fish. 

 Young-of-t he-year bass were extremely scarce at Heyburn in 1954 and 1955. Ex- 

 tensive seining in all areas and the nine rotenone samples yielded only 57 

 young in 1954, and 39 in 1955. All evidence points to a small population dominated 

 by slow-growing, older bass, with very limited recruitment through natural re- 

 production. It seems extremely doubtful that the population 



