SURVEY DATA 



We collected several kinds of data in 1969 

 to increase our knowledge of the herd's reaction 

 to management programs. Living adult males 

 and dead seals were counted, causes of and 

 trends in pup mortality were established or 

 extended, and living pups were weighed. 



Living Adult Male Seals Counted 



The living adult males (approximately age 

 7 and older) on all rookeries were counted in 

 June and July on St. Paul and St. George 



Islands and on Sea Lion Rock (tables A-5 to 

 A-8). 



Attempts to increase the utilization of young 

 males in recent years by harvesting large 4- 

 year-olds and some of the small 5- and 6-year- 

 olds have been successful, as shown by a de- 

 cline in the number of idle males counted in 

 mid-July of 1969 (table A-9) to 25 percent of 

 the average number counted from 1960 to 1962. 

 A decrease in the number of harem males to 

 58 percent of the average number counted 

 during the same period is attributed partly 

 to the decline in numbers of idle males but 

 primarily to a reduction in the number of 

 breeding females. 



Table 1. --Kill of male seals. L' by year class- p ri bilof Islands, Alaska. 1954- 



. 7 



1_/ Includes only age 2- to 5-year-old seals taken during the kill of male seals on the Pribilof Islands. 

 From 1956 to 1967, 131 1-year-olds and 685 6-year-olds were taken on St. Paul Island and 20 1-year-olds 

 and 319 6-year-olds were taken on St. George Island. In addition, age was not determined for 4, 919 males 

 taken on St. Paul Island, nor for 1, 522 taken on St. George Island. 



2/ Incomplete returns. 



3/ 1965, 1966, and 1967 year classes not included. 



