Page 



Summary 31 



Acknowledgments 32 



Glossary 32 



Part II. Pelagic fur seal investigations, 1968 34 



Research in 1968 34 



Distribution off Washington 34 



Distribution in Alaska waters 34 



Abundance 45 



Age and sex 45 



Tag recoveries 45 



Lengths and weights 45 



Reproduction , 45 



Feeding habits 48 



Relation of feeding habits to commercial fisheries 53 



Summary 69 



Literature Cited 69 



Appendix A tables 70 



Appendix B--Persons engaged in fur seal research on the Pribilof Islands in 1968 99 



Appendix C tables 100 



FIGURES 

 No. 



1. Location of rookeries and hauling grounds, St. Paul Island 3 



2. Location of rookeries and hauling grounds, St, George Island 3 



3. Kill of 3- and 4-year-old male seals, St. Paul Island, 26 June to 2 August 1968 .... 5 



4. Kill of 3- and 4-year-old male seals, St. George Island, 26 June to 5 August 1968 . . 5 



5. Seal pup mortality study areas 1 and 2, Reef Rookery, St. Paul Island, mid-July 



1968 7 



6. Seal pup mortality study area 3, Northeast Point Rookery, St. Paul Island, mid- 



July 1968 7 



7. Percentage of seal pups that died of various causes. Reef Rookery study area 1, 



1964 and 1966-68, and Northeast Point study area, 1967 and 1968, St. Paul 



Island 10 



8. Number of seals pups that died of various causes. Reef Rookery study area 1, 



1964 and 1966-68, and Northeast Point study area 3, 1967 and 1968, St. Paul 



Island 10 



9. Examples of mark locations that have been used on fur seals, Pribilof Islands, 



Alaska 13 



10. Number of seals seen per hour of effort in each square (areal unit) occupied by a 



research vessel in November 1967 off Washington. The sides of each square 



measure 18.52 km. (10 nautical miles). Squares occupied for less than 0.5 hours 



are n-iarked "X." See table C-2 for detailed data 35 



11. Number of seals seen per hour of effort in each square (areal unit) occupied by a 



research vessel in December 1967 off Washington. The sides of each square 



measure 18.52 km. (10 nautical miles). Squares occupied for less than 0.5 hours 



are marked "X." See table C-3 for detailed data 36 



12. Number of seals seen per hour of effort in each square (areal unit) occupied by a 



research vessel in January 1968 off Washington. The sides of each square meas- 

 ure 18.52 knn. (10 nautical miles). Squares occupied for less than 0.5 hours are 

 marked "X." See table C-4 for detailed data 37 



13. Number of seals seen per hour of effort in each square (areal unit) occupied by a 



research vessel in February 1968 off vVashington. The sides of each square 



measure 18.52 km. (10 nautical miles). Squares occupied for less than 0.5 hours 



are marked "X." See table C-5 for detailed data 38 



14. Number of seals seen per hour of effort in each square (areal unit) occupied by a 



research vessel in May 1968 in Alaska waters between Dixon Entrance and 



long. 156° W. The sides of each square measure 18.52 km. (10 nautical miles). 



Squares occupied for less than 0,5 hours are marked "X" 39 



