CONTENTS 



Page 



Introduction 1 



Part I, Fur seal investigations, Pribilof Islands, Alaska 2 



Age classification and number of seals killed, by sex 2 



Males 2 



Females 6 



Survey data 7 



Mortality 7 



Counts of living adult male seals 10 



Reproductive condition of female seals. , 10 



Weights of pups 11 



Marking 11 



Application of marks 11 



Recoveries of marked seals 12 



Population estimates 16 



Number of pups born 16 



Number of yearling male seals 17 



Forecast of the kill of male seals in 1968 18 



Forecast of the kill of 4-year-old male seals on St, Paul Island 19 



Combined estimates of the kill of 4-year-old male seals on St. Paul Island 21 



Forecast of the kill of 3-year-old male seals on St. Paul Island „ . , 22 



Combined estimates of the kill of 3-year-old male seals on St. Paul Island 22 



Forecast of the total kill on the Pribilof Islands 23 



Special study: Nutrition of pups 2 3 



Summary 25 



Acknowledgments 26 



Glossary 27 



Part EL. Pelagic fur seal investigations 28 



Equipment, methods, and personnel „ 28 



Distribution , 28 



Distribution off Washington in January and February 1967 28 



Distribution off Washington, Oregon, and northern California in August and 



September 1967 33 



Distribution in the Bering Sea and near the eastern Aleutian Islands in 



November and December 1965-66 33 



Tag recoveries 38 



Size 38 



Reproduction 38 



Attached organisms (commensals) 41 



Food 41 



Stomach contents of fur seals taken off Washington 41 



Ingestion of marine organisms by pups 44 



Relation of fur seals to commercial fisheries 45 



Observations of Japanese pelagic fur seal research 47 



Summary 54 



Literature cited 54 



Appendix A 56 



Appendix B 84 



Appendix C 85 



