FORECAST OF THE TOTAL KILL 

 ON THE PRIBILOF ISLANDS 



Table 23 shows the forecast of the total 

 kill of males on the Pribilof Islands in 1968. 

 We have rounded the number of males in 

 ages 2 and 5 to the nearest five hundred. 

 The forecasted kill for both islands was de- 

 termined by the usual method, that of extra- 

 polating the estimates for St. Paul Island to 

 St. George Island by a factor of 1.25. Because 



we believed the estimates were low, they were 

 rounded upward. 



The forecasted and actual kills of males in 

 1967 are compred in table 24. 



The absolute error between the forecasted 

 and actual total kill of slightly under 1,500 was 

 almost identical with that obtained for the 

 forecasted and actual total kill in 1966. 



In 1967, the kill on St. George Island was 

 22.8 percent of the total, slightly higher than 

 the long-term average of 20.0 percent. 



Table 23. — Forecast of the kill of male seals in 1968, by age, 

 Pribilof Islands, Alaska 



Table 24. --Comparison of forecasted and actual kill of male seals, 

 Pribilof Islands, Alaska, 1967 



SPECIAL STUDY: NUTRITION OF PUPS 



The nutritional requirements of newborn 

 fur seals have been studied since 1963 by 

 analyzing fur seal milk and by feeding various 

 formulas. The primary purpose of these efforts 

 has been to make newborn fur seals available 

 for studies in a controlled environment. 



In 1967, a feeding trial was conducted to: 

 (1) test the theory that the addition of selenium, 

 vitamin E, methionine, and glycerin to the diet 

 enhances the utilization of fatty acids, and (2) 



provide subjects for experiments in freeze- 

 branding and disease susceptibility. Three pups 

 were fed formula (table 25) with selenium, 

 vitamin E, methionine, and glycerin added; and 

 three were fed formula without this supple- 

 ment. 



The pups were captured when 1 to 3 days old 

 and had presumably nursed. On the first day 

 they were weighed and bathed, had their 



23 



