Table 
. Seasonal variation in observed sex-ratios in different age-groups of Hawaiian Monk Seals on Laysan Island 
_ ADULTS _ sub-adults/yearlings _ PUPS 
Season 
No. of 
f of 
dtr 
No. of 
?5 
% of 
?9 
No.of 
dtr 
io of 
dtr 
No. of 
9 ? 
i of 
99 
No. Of 
dtr 
/o of 
dtr 
No. of 
99 
io of 
99 
Spring (Mar.) 
6/191 
^3-3 
6/250 
56.7 
6/137 
45.8 
6/162 
54.2 
4 / 4 l 
52.6 
4/37 
47.7 
Summer (June, Aug.) 
3 A» 
k2.k 
3/65 
51-S 
3/21 
45.7 
3/25 
54.3 
4/72 
72.7 
4/27 
27.3 
Autumn (Sept.-Oct.) 
k/ik5 
62.5 
^/ 8 Y 
37.5 
4/57 
56.4 
4/44 
43.6 
2/17 
50.0 
2/17 
50.0 
Winter (Dec., Feb.) 
2/28 
50.9 
2/27 
49.1 
2/10 
35.7 
2/14 
64 .3 
1/1 
100.0 
1/0 
0.0 
■¥r 
The figure to the 
left of 
the virgule is the number 
• Of counts made in each season in 
which sex ratios were 
recorded for the 
age-class 
and for which data is available; 
the one 
to the right is 
the total number observed 
in each season. 
