Figure 13. — Number of seals seen per hour of effort 

 in each areal unit occupied by a research vessel in 

 February 1969 off Washington. The sides of each 

 unit measure 10 minutes of latitude by 10 minutes 

 of longitude. Units occupied for less than 0.5 hour 

 are marked "X." See table B-l for detailed data. 



Table B-5 gives the numbers and percentages 

 of animals collected, wounded and lost, and 

 killed and lost among seals sighted, and table 

 B-6 gives these data for seals shot between 

 California and the Bering Sea from 1958 to 

 1969. 



We saw solitary seals more frequently than 

 paired animals or larger groups (table B-7). 

 For example, 38 percent of the animals seen 

 were single and 27 percent were paired; the 

 largest group of seals sighted contained 16 ani- 

 mals; and 32 percent of the animals were in 

 groups of 3 to 7. 



Age and Sex 



Table 41 gives the age and sex of seals col- 

 lected in 1969. Fifty-four percent of 299 fe- 

 males killed were 1 to 7 years old, and 48 year- 

 ling seals (17 males and 31 females) from the 

 1968 year class were taken. We appraised the 

 general physical condition of yearling seals by 



measuring the depth of the subcutaneous layer 

 of fat over the sternum and pelvis (table B-8). 



Recoveries of Marked Seals 



We killed 26 marked seals (table 42). A 

 7-year-old female had a tag applied by Soviet 

 biologists on Bering Island in 1962. Three 

 males and twenty-one females had tags at- 

 tached by U.S. biologists on the Pribilof Islands, 

 who also had removed the tip of the first digit 

 on the right hind nipper of one female that we 

 collected (fig. 9). 



Lengths and Weights 



Tables B-9 to B-l 4 give the mean lengths 

 and weights of males and pregnant and non- 



Figure 14. — Number of seals seen per hour of effort 

 in each areal unit occupied by a research vessel in 

 March 1969 off Washington. The sides of each unit 

 measure 10 minutes of latitude by 10 minutes of 

 longitude. Units occupied for less than 0.5 hour 

 are marked "X." See table B-2 for detailed data. 



38 



