Page 



17. Estimates of the pup population based on tag recoveries from males, Pribilof Islands, 



Alaska, year classes 1959-62 16 



18. Estimates of the pup population based on recoveries of tagged male seals at ages 3 



and 4, Pribilof Islands, Alaska, year classes 1958-61 ■ 17 



19. Estimated number of pups born, Pribilof Islands, Alaska, year classes 1951-62 .... 17 



20. Estimates of the pup population based on tag recoveries from females, Pribilof 



Islands, Alaska, year classes 1958-62 18 



21. A comparison of total pup counts on four rookeries with pup population estimates 



from marked to unmarked ratios, St. Paul Island, year class 1964. 19 



22. Estimates of the pup population from marked to unmarked ratios obtained after shear- 



ing, St. Paul Island, year class 1964 20 



23. Estimates of the pup population from marked to unmarked ratios, St. Paul Island, 



year classes 1961-64 21 



24. Estimates of the pup population from live pup sampling and tag recoveries, Pribilof 



Islands, Alaska, year classes 1960-64 21 



25. Mean weights of untagged pups and male returns, Pribilof Islands, Alaska, year 



classes 1957-60 22 



26. Mean weights of seal pups, St. Paul Island, year class 1964 , 22 



27. Mean weights of seal pups approximately 1 week after tagging, St. Paul Island, year 



classes 1957-64 23 



28. Skins collected for experimental use, St. Paul Island, 1958 and 1961-64 23 



Appendix A tables 



1. The 3- and 4-year-old male kill and mean date of the 3-year-old male kill, St. Paul 



Island, year classes 1952-60 26 



2. The 3- and 4-year-old male kill and mean temperature, St. Paul Island, year classes 



1950-60 27 



3. Cumulative female population estimates, 1950-60 28 



4. Prediction of the kill in 1965, by age, Pribilof Islands, Alaska 29 



Appendix B tables 



Male data: 



5. Age classification of male seals killed on St. Paul Island, 1 July to 5 August and 



17-28 August 1964 31 



6. Cumulative age classification of male seals killed on St. Paul Island, 1 July to 



5 August and 17-28 August 1964 32 



7. Age classification of male seals killed on St. George Island, 1 July to 7 August and 



14-26 August 1964 33 



8. Cumulative age classification of male seals killed on St. George Island, 1 July to 



7 August and 14-26 August 1964 34 



9. Bull counts, Pribilof Islands, Alaska, 1911-41 and 1943-64 35 



Female data: 



10. Age classification of female seals killed on St. Paul Island, 17-28 August 1964 36 



11. Cumulative age classification of female seals killed on St. Paul Island, 17-28 August 



1964 36 



12. Age classification of female seals killed on St. George Island, 14-26 August 1964 ... 37 



13. Cumulative age classification of female seals killed on St. George Island, 14-26 



August 1964 37 



Tag recovery data: 



14. Recovery location of tagged male seals killed, by age and rookery, Pribilof Islands, 



Alaska, 1 July to 7 August 1964 38 



15. Soviet tags recovered from the kill, Pribilof Islands, Alaska, 1964 39 



