CONTENTS -- Continued 



Page 



13. Number of seals seen per hour of effort in each area] unit occupied by a research 



vessel in February 1969 off Washington. The sides of each unit measure 10 

 minutes of latitude by 10 minutes of longitude. Units occupied for less than 0.5 

 hour are marked "X." See table B-l for detailed data 38 



14. Number of seals seen per hour of effort in each area] unit occupied by a research 



vessel in March 1969 off Washington. The sides of each unit measure 10 min- 

 utes of latitude by 10 minutes of longitude. Units occupied for less than 0.5 

 hour are marked "X." See table B-2 for detailed data 38 



15. Percentage of stomach content volume and percentage occurrence of principal food 



species in fur seal stomachs collected off Washington in 1969 42 



16. Locations where fur seal stomachs collected off Washington in 19(59 contained 



Engraulis mordax (48 occurrences) 44 



17. Locations where fur seal stomachs collected off Washington in 1969 contained 



Clupea harengus }>allnxi (16 occurrences) 45 



18. Locations where fur seal stomachs collected off Washington in 1969 contained 



MaUotus villosus (31 occurrences) 46 



19. Locations where fur seal stomachs collected off Washington in 1969 contained Salm- 



onidae (16 occurrences) 47 



20. Locations where fur seal stomachs collected off Washington in 1969 contained Sebas- 



todes spp. ( 18 occurrences) 48 



TABLES 



1. Kill of male seals, by year class, Pribilof Islands, Alaska, 1954-67 5 



2. Analysis of variance in the weights of living seal pups, St. Paul Island, 28-29 



August 1969 6 



3. Variances in, and means of, the weights of living seal pups, St. Paul Island, 28-29 



August 1969 7 



4. Dead seals counted that were older than pups, Pribilof Islands, Alaska, 1965-69 ... 7 



5. Primary diagnoses for causes of death among seal pups, three mortality study 



areas, St. Paul Island, 26 June to 15 August 1969 8 



6. Summary of tag loss for male seals tagged as pups, tag series Q through T, Prib- 



ilof Islands, Alaska 13 



7. Summary of tag loss for male seals tagged at age 1 or older, Pribilof Islands, Alaska 14 



8. Summary of recoveries of seal pups, year classes, 1965-66, marked by two methods, 



Pribilof Islands, Alaska 14 



9. Estimates of the seal pup population, year classes, 1963-67, at time of marking 



from recoveries of marked male seals in ages 2 to 6, Pribilof Islands, Alaska .... 15 



10. Estimates of the seal pup population, year classes 1960-66, at time of tagging, 



from recoveries of marked male seals in ages 3 and 4, and the count of dead 



pups, Pribilof Islands, Alaska 15 



11. Estimates of the seal pup population, year class 1969, at time of shearing, St. 



Paul Island 16 



12. Estimates of the number of seal pups born, year classes 1963-69, from shearing 



and sampling, St. Paul Island 16 



13. Estimates of the seal pup population, year classes 1961-66 and 1969, for St. Paul 



Island from shearing and sampling, and for the Pribilof Islands, Alaska from 



an extrapolation 17 



14. Comparison of estimates based on tag recoveries with estimates based on shearing 



and sampling, for number of seal pups born, year classes 1961-66, Pribilof Islands, 



Alaska 17 



