Table 22. —Tagged male and female seals without 

 checkmarks, Pribilof Islands, Alaska, 1963 



Table 23. — Summary of double-tagged seals 

 recovered from the kill, St. Paul Island, 

 1961-63 



Analysis of the data showed that the rate 

 of tag loss among males differed from year 

 to year (P< .005), but that the difference in 

 rate of loss between males and females re- 

 covered in 1962 and 1963 was not significant 

 (P >.25). 



Therefore, data for the sexes were com- 

 bined and the probabilities of tag loss among 

 double-tagged seals calculated for the years 

 1961-63 (table 24). The probabilities of tag 

 loss among recoveries of all males double 

 tagged and single tagged on St. Paul Island 

 in 1958 are also included in the table. Males 

 that had lost their single tag were identified 

 by their checkmarks. The estimates from 

 both groups were similar in that the rate of 

 tag loss increased with age from about 25 

 percent at age 3 to 50 percent at age 5. 



Homing Tendency 



Homing tendency of tagged male and female 

 seals is shown in table 2 5 by age and in table 

 26 bv rookery. 



Table 24. — Probability of tag loss among double- 

 tagged seals of both sexes and among double- 

 and single-tagged males, St. Paul Island, 

 1961-63 



21 



