TABLE 8. 



Record of Tag Recaptvires and Conanercial 

 Catch of Pigtoe Mussels in Wheeler Reservoir 

 ^Mile 308-316) by Time Periods. 



Year Month Catch Tag Recaptures 



1956 Jlme 927,000 12 



16 



5 



1957 March 211,000 k 



22 



3 



9 



13 



3 



87 



TABLE 9. 



Estimate of the Popiilation of Pigtoe Mussels in Wheeler 

 Reservoir (Mile 308-316) by Mark-and-Recovery Method. 

 Recaptures by Crowfoot Brail from June 1, 1956 to August 

 31, 1957. (Estimate as of August 31, 1957 with Poisson 

 Distribution Assumed for the Recaptures) . 



*Mortality estimated at 25 percent. 

 **Confidence limits - 95 percent. 



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