Name 



Arrival Departure 



Affiliation 



Work 



Lee Eberhardt 



7 Aug. 



12 Aug. 



Don Watson 



Dennis Bordukofsky 1 



David Galaktionoff ' 



Patrick Kozloff 1 

 Agafon Krukoff, Jr. 1 

 Lavrenty Stepetin 1 

 Herman Lestenkof 



Innokenty C. Lestenkof 1 



General Electric 

 (AEC) 



St. Paul Island resi 

 dent 



St. George Island 

 resident 



Collect reindeer 

 flesh, bones, 

 and stomach 

 contents for 

 analysis of ra- 

 dioactivity 



Behavior of fur 

 seals 



Fur seal re- 

 search, gen- 

 eral 



Temporary employees. 



POPULATION 



MALES 

 Age Classification 



The male seals killed on the Pribilof Islands 

 in 1963 are classified by age in appendix 

 tables 4, 5, 6, and 7. The length limits origi- 

 nally prescribed for taking males were 42 to 

 48-3/4 inches, tip of nose to tip of tail. The 

 maximum length limit, however, was removed 

 early in the season to permit the killing of an 

 abundance of overlimit animals of commercial 

 quality. The number of males of each age 

 class that were taken as a result of the change 

 has been conservatively estimated at: 450 

 3-year-olds, 2,200 4-year-olds, and 500 5- 

 year-olds. 



The practice of confining the kill of male 

 seals within minimum and maximum length 

 limits has protected most 2-year-olds and has 

 assured replenishment of the breeding stock 

 through escapement of overlimit 4-year-olds. 

 The large number of idle bulls present in the 

 herd, however, indicates that the killing of 

 males has been too restrictive in recent years. 

 Where the ratio of idle to harem bulls in 1930 

 was 1 to 4 on land, it is now about 1 to 1 . 

 Because the number of idle bulls seemed 

 excessive, the male killing season was ex- 

 tended well into August in most years since 



1956 to reduce recruitment of males into the 

 breeding reserve. But the effect of the extended 

 season was moderated by concurrent use of a 

 maximum length limit, especially in years 

 when there were large returns of one or more 

 age classes. Length data from known-age 

 males have shown that some 3-year-olds and 

 many 4-year-olds are longer than 48-3/4 

 inches. 



When the maximum length limit is removed 

 because it is too restrictive, an alternative 

 guide for killing should be provided. Absence 

 of secondary sex characteristics may be an 

 acceptable substitute. When present, the most 

 obvious secondary sex characteristic is the 

 mane, which is easily identified by the long, 

 silver-colored guard hairs on the neck. Most 

 or all 6-year-old males have a developing 

 mane; some 5-year-old males may have a 

 rudimentary mane. Underfur length, however, 

 is about the same regardless of age or size 

 of the animal. 



A satisfactory solution to regulation of male 

 escapement may be to use a maximum length 

 limit when additional breeding stock is needed 

 and to use absence of the mane when elimina- 

 tion of all available 4-year-olds is desirable. 

 Presumably, fewer breeding males are needed 

 as the number of females are reduced. 



