No. Page 



4. Kill of female seals, by year class, Pribilof Islands, Alaska, 1943-67 6 



5. Primary causes of death among seal pups within three mortality study areas, St. 



Paul Island, 4 July to 15 August 1968 8 



6. Seal pups that died of malnutrition with secondary bacterial enteritis, all mortality 



study areas, St. Paul Island, 1964 and 1966-68 9 



7. Dead seals counted that were older than pups, Pribilof Islands, Alaska, 1965-68 ... 11 



8. Age composition of dead male seals, age 6 and older, Pribilof Islands, Alaska, 



1965-68 11 



9. Reproductive condition of female seals sampled fron-i the kill, by age, St. Paul 



Island, Z6 June to 16 August 1968 12 



10. Pregnancy rates of fennale seals from hauling grounds and rookeries, age 8 and 



older, St. Paul Island 12 



11. Variances in and means of the weights of living seal pups, St. Paul Island, 30 



August 1968 12 



12. Analysis of variance in the weights of living seal pups, St. Paul Island, 30 August 



1968 12 



13. Means of the weights of living seal pups, Robben and Bering Islands, U.S.S.R., 1968. 13 



14. Summary of tag loss for male seals tagged as pups, tag series O through S, Pribilof 



Islands, Alaska 15 



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



Alaska 16 



16. Tag recoveries from male seals tagged as pups in August and September, St. Paul 



Island, 1963-64 16 



17. Estimates of the seal pup population, year classes 1961-65, at time of marking 



from recoveries of n-iarked female seals killed in 1967 and 1968, Pribilof Islands, 

 Alaska 17 



18. Estimates of the seal pup population, year classes 1963-66, at time of marking 



from recoveries of marked male seals killed 26 June to 2 August 1968, Pribilof 

 Islands, Alaska 17 



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



recoveries of marked n-iale seals in ages 2 to 5, Pribilof Islands, Alaska 17 



20. Estimates of the seal pup population, year classes 1960-65, at time of tagging from 



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



Pribilof Islands, Alaska 18 



21. Estimates of the seal pup population, year class 1968, fronn shearing and sampling 



on selected rookeries, St. Paul Island 18 



ZZ, Mean estimates of the seal pup population, year classes 1966 and 1968, from 



shearing and sampling on selected rookeries, St. Paul Island 19 



23. Complete counts of living seal pups on selected rookeries in early August, St. 



Paul Island, 1963-68 19 



24. Estimates of the number of yearling nnale seals, year classes 1964-66, from re- 



coveries of tagged male seals, Pribilof Islands, Alaska . 20 



25. Summary of male seals known or believed to be 2 years old when tagged in 1966, 



and recovered in 1967 and 1968, St. Paul Island 21 



26. Estimates of the number of 2- and 3-year-old male seals, year classes 1963-64, 



from recoveries of male seals known or believed to be 2 years old when tagged, 



St. Paul Island 21 



27. Comparisons of forecast of kill of 4-year-old male seals, by method, St. Paul 



Island, 1965-68 22 



28. Comparisons of forecast of kill of 3-year-old male seals, by method, St. Paul 



Island, 1965-68 23 



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



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

 1953-64, St. Paul Island 24 



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



weight of living seal pups, and count of dead pups, year classes 1950-64, St. 



Paul Island 24 



31. Comparison of estimated and actual kill of 3- and 4-year-old male seals, year 



classes 1957-64, St. Paul Island 25 



32. Analysis of variance in a regression of the total kill of 3- and 4-year-old male 



seals (K) on count of dead seal pups (D) and mean weight of living seal pups (W). . 25 



