Table 4 . --Kill of female seals, by year class, ~ 

 Pribilof Islands, Alaska, 1943-67 



1/ 



1/ Includes pelagic research kill of the United States and Canada, 

 1958-68. In addition, 138, 665 females age 7 and older and 7, 067 

 females ol undetermined age were taken. 



SURVEY DATA 



Data were collected on: (1) numbers of dead 

 pups, (2) causes of pup mortality, (3) seasonal 

 and annual trends in pup mortality, (4) number 

 of dead adults, (5) number of living adult 

 males, (6) reproductive condition of females, 

 and (7) weights of living pups. 



DEAD SEAL PUPS COUNTED 



Total counts of dead pups have been made 

 after 15 August on the Pribilof Islands nearly 

 every year since 1941. About twice as many 

 were counted in 1968 than in 1967 (table A- 13), 

 Of 31,438 dead pups counted in 1968, 26,563 

 were on St. Paul Island and 4,875 were on St. 

 George Island. 



In 1966, the rookeries on St. Paul Island 

 were subdivided into sections that contained 



about 100 class 3^ males counted on land in 

 mid-July 1965. Records of counts by section 

 (table A- 14) have now been kept for 3 years. 

 Mortality, according to the counts, does not 

 vary uniformly on all rookeries nor on sections 

 of rookeries. For example, the counts of dead 

 pups on Polovina Cliffs Rookery were 809, 

 825, and 1,616 in 1966, 1967, and 1968, re- 

 spectively, but the total counts (nearest 1,000) 

 for St. Paul Island in each of the 3 years were 

 21,000, 14,000, and 27,000. Apparently the 

 mortality differs among the rookeries, and 

 if true, mortality from various causes probably 

 varies among rookeries and sections of rook- 

 eries within a year. 



""" Territorial males with females. 



