310 



U.S. BUREAU OF FISHERIES 



Distribution of pups on the Pribilof Islands, Aug. 10, 1933, and co)npatH»on with 

 distribution in 1932 



MORTALITY OF SEALS AT SEA 



The mortality rates used for computing the number of animals 

 in the herd are the same as were used in computing the estimate 

 for 1932. These rates will answer all practical purposes until very 

 abnormal conditions arise. 



COMPLETE COMPUTATION 



The following summary shows the methods used for computing the 

 number of animals in the fur-seal herd of the Pribilof Islands in 

 1933. The total number of seals of all classes is 1,318,568, or 98,607 

 more than in 1932. This is an increase of 8.08 percent. 



