Page 



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



research vessel in March 1966, off California. The sides of each square measure 



18.52 km. (10 nautical miles). Squares V14-H18 and V29-H27 were not occupied. 



See table C-3 58 



33. Major food items found in stomachs of fur seals collected off California, by per- 



centage of total stomach volume, 1958-66 ^4 



TABLES 



1. Kill of male seals, by year class, Pribilof Islands, Alaska, 1947-64 5 



2. Estimated mortality of pups from birth to about 25 August, by rookery, year 



classes 1963-66, Pribilof Islands, Alaska Y 



3. Primary causes of death among pups. Reef Rookery study area, St. Paul Island, 



28 June to 22 August 1966 8 



4. Distribution of primary causes of death among pups, by age. Reef Rookery study 



area, St. Paul Island, 28 June to 22 August 1966 9 



5. Primary causes of death among pups, Reef Rookery study area, St. Paul Island, 



9 July to 22 August 1964 and 1966 10 



6. Comparison of number of dead pups on Reef Rookery study area and St. Paul Island, 



1964-66 10 



7. Ovarian activity of 3- and 4-year-old female seals, St. Paul Island, 1965 13 



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



Alaska, 6 July to 5 August 1966 I7 



9. Tag recoveries from nriale seals that had been selected and tagged as yearlings in 



previous years, Pribilof Islands, Alaska, 6 July to 5 August 1966 18 



10. Tag recoveries from nnale seals, by island and rookery of birth, and age, Pribilof 



Islands, Alaska, 1958-66 ig 



1 1. Tag recoveries from male seals, by island of birth, age, and year class, Pribilof 



Islands, Alaska, 1958-66 20 



12. Number of tags recovered from two periods of tagging, St. Paul Island 20 



13. Estimates of the pup population based on tag recoveries from 3- and 4-year-old male 



seals, by 5-day periods, year classes 1962-63, Pribilof Islands, Alaska 21 



14. Estimates of the pup population based on tag recoveries from male seals killed in 



1966 from year classes 1961-64, Pribilof Islands, Alaska 22 



15. Estimates of the pup population based on tag recoveries from male seals and the 



count of dead pups, year classes 1960-64, Pribilof Islands, Alaska 22 



16. Estimates of the pup population based on shearing and sampling, year class 1966, 



Pribilof Islands, Alaska 22 



17. Counts of pups on three rookeries compared to estimates based on shearing and 



sampling, year class 1966, St. Paul Island 23 



18. Estimates of the pup population at the time of marking based on shearing and 



sampling, year classes 1961-66, St. Paul Island 23 



19. Estimates of the total pup population based on shearing and sampling and the count 



of dead pups, year classes 1961-66, Pribilof Islands, Alaska 23 



20. Estimates of the number of pups per harem male, year classes 1963-66, Pribilof 



Islands, Alaska 24 



21. Estimates of the population of yearling male seals based on tag recoveries from 



male seals selected and tagged as yearlings, year classes 1961-62, Pribilof 



Islands, Alaska 24 



22. Data for regression of the kill of 4-year-old male seals on the kill of 3-year-old 



male seals and mean round of the kill of 3-year-old male seals, year classes 



1953-62, St. Paul Island 26 



23. The kill of 3- and 4-year-old male seals and mean air temperature, year classes 



1950-62, St. Paul Island 27 



24. Data on the mean weight of untagged pups and the kill of male seals at ages 3 and 4 



from the same year class, year classes 1957-63, St. Paul Island 28 



25. Estimated number of pups born, count of dead pups, and number of male seals 



killed at ages 2 to 5, year classes 1950-62, St. Paul Island 28 



26. Estimates of the total nunnber of pups born, based on shearing and sampling and on 



the counts of dead pups, year classes 1961-65, St. Paul Island 29 



27. Forecast of the kill of male seals in 1967, by age, Pribilof Islands, Alaska 29 



28. Forecasted and actual kill of male seals, Pribilof Islands, Alaska, 1966 30 



