CONTENTS 



Page 



Introduction 



Population 



Males 



Age classification 



Bull counts 



Females 



Age classification 



Reproduction 



Tag recoveries and tagging 



Tag recoveries 



Tagging- -pups 



Survey--yearlings 



Mortality 



Population estimates 



Estimates of the pup population from the recovery of tagged males 



Estimates of the pup population from the recovery of tagged females 



Estimated number of yearling males, 1961 year class 



Estimated pup population from sampling live pups 



Estimated pup population from the count of pups on four rookeries 



Discussion of the estimates of the pup population 



Seal-pup weights 



Related studies 



Summary 



Acknowledgments 



Literature cited 



Glossary 



Appendix A. Predictions of 1965 male kill 



Appendix B. Appendix tables and figures 



FIGURES 



1. Kill of male seals, by age and round, St. Paul Island, 1964 



2. Percent 3- and 4-year-old male seals in cumulative kill, by date, Pribilof Islands, 



Alaska, 1964 



TABLES 



1. Kill of male seals, by year class, Pribilof Islands, Alaska, 1947-62 



2. Kill of 3- and 4-year-old male seals at various dates, St. Paul Island, 1954-64 



3. Cumulative number of male seals killed, St. Paul Island, 1955-64 



4. Harem and idle bull count, by rookery, Pribilof Islands, Alaska, 1964 



5. Kill of female seals, by year class, Pribilof Islands, Alaska, 1939-63 



6. Percent age composition of female seals sampled from the kills, Pribilof Islands, 



Alaska, 1958-64 



7. Age classification of female seals in kill, by source, St. Paul Island, 1964 



8. Summary of tagged and tag-lost seals recovered, by age and sex, Pribilof Islands, 



Alaska, 1964 



9. Homing tendency of male seals, by age, Pribilof Islands, Alaska, 1964 



10. Homing tendency of male and female seals, by rookery, Pribilof Islands, Alaska, 



1964 



11. Tag recoveries in 1964 from seals selected and tagged as yearlings, Pribilof Islands, 



Alaska 



12. Homing tendency of seals selected and tagged as yearlings, by sex and rookery, 



St. Paul Island, 1964 



13. Summary of Soviet tags recovered from the kill, Pribilof Islands, Alaska, 1964 



14. Fur seal pup tagging, Pribilof Islands, Alaska, 1964 



15. Known-age yearlings counted, by rookery, date, and sex, St. Paul Island, 1964 



16. Dead-pup counts, Pribilof Islands, Alaska, 1964 



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