Numerators of the left-hand side of the equations, the B55 
are obtained from table 25, combining the recoveries at ages 3 and 4. 
The solutions are-— 
a 206,971 
Ni, = 114,944 
N = 9,877 
3 ave 
N = 39,549 
N,. = 132,834 
However, this is based on recovery of tags only; no allowance has been 
made for deliberate killing for tags or for the recovery of tag—lost 
animals. In a moment it will be shown that the corrected number of 
recoveries of tags and tag-lost animals is 2,303; the procedure above 
is based on 1,708 tags. Consequently each of the estimates must be 
reduced by the factor 
1,708 , or 0.7375 
2,316 
The entire foregoing estimations procedure was applied to 
the A-tags recovered in 1950 and the A-tags recovered in 1951 separately. 
The adjusted estimates for the five areas are shown below. 

Northeast The Reef~ Tolstei and The 
Point Polovinas Gorbatch Lukanin-Kitovi Zapadnis 
1950 returns 138,280 86, 316 27,122 29,762 86, 262 
1951 returns 195,121 83,606 18,289 29,202 128,627 
Composite 152,641 84,771 29,409 29,167 97,965 
Composite Total = 393,953 
Adjustment for number of tagged seals recovered 
Because the sealers were instructed in 1950 and 1951 to kill all 
tagged animals regardless of size, the kills were not representative with 
respect to tag recoveries. The tagged animals were killed because they 
wore tags, while the untagged animals were killed because they were of 
comercial size, approximately 41 to 45 inches in length. Hence, it is 
necessary to calculate the number of tagged animals that would have been 
recovered had they been killed for size, regardless of tags. This has 
been done in table 22 where the calculations were used to estimate through-_ 
the-season escapement. 
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