
Table 13 (with graph).--Mortality rate of pups on a portion of 
Vostochni rookery, by 5-day intervals in 1951. 

NUMBER OF DEAD PUPS 
Cumulative total Increment at 
Date of dead pups 2-day intervals 
June 25 O 
July 2 2 2 
; oF 20 18 
12 45 25 
1? 95 30 
22 160 15 
27 235 15 
Aug. 1 317 82 
6 385 68 
11 4o7 hoe 
16 4.30 3 
100 
80 
60 
40 
20 
JULY2 7 i2 17 22 2? AUG.| 6 i is 
32 
