TABLE 29.--Percent of complete rookery dead-pup counts represented by sample-area counts, 



St. Paul Island. 1956-62 



Rookery 



1956 



1957 



1958 



1959 



1960 



1961 



1962 



Percent 



1 Sample areas not counted separately in 1962. 



TABLE 30. --Comparison of total dead-pup count and sample areas count, St. Paul Island, 1956-62 



Year 



Total 



dead- pup 



count 



Sample 

 areas 

 count 



Total dead 

 pups esti- 

 mated from 

 ratio (total 

 count/sample 

 areas count*) 



Difference 



of total 

 dead pups 

 estimated 

 with ratio 

 and total 

 dead- pup 

 count 



Difference 

 as percent- 

 age of total 

 dead -pup 

 count 



Total dead 

 pups esti- 

 mated with 

 regression 

 equation ' 



Difference 

 of total dead 

 pups esti- 

 mated with 

 equation and 

 total dead- 

 pup count 



Difference 

 as percent- 

 age of total 



dead-pup 

 count 



1956 

 1957 

 1958 

 1959 

 1960 

 1961 

 1962 

 Total 



(a) 

 98,707 



61,662 



31,187 



39,964 



62,828 



57,867 



40,190' 



(b) 

 31,301 



19,729 



11,802 



14,125 



20,374 



20,615 



12,942 



(c) 

 93,829 



59,140 



35,378 



42,341 



61,073 



61,796 



38,795 



392,405 130,888 



392,352 



53 



392.757 



352 



1 Ratio used for estimate was: 7 years total dead-pup counts (392,405)/ 



7 years total sample-areas count (130,888). 



'Regression equation used for estimate was: Y» 3.3322X-6198. 

 'Count does not include Polovina Cliffs and Linle Polovina. 



39 



