Table 55, Seasonal Changes in Sex Ratios of Adult Mallards in the 
Mississippi Flyway . 

a 0 =r 
Total Sex Ratio. 
Period Observed Weighted Observed Weighted 
Oct. 7-13 male 180 134 85 85 
female 211 L583 
14-20 male 6h, 57 100 102 
female 64 56 
21-27 male xe) 60 72 78 
female 68 77 
Oct. 2b- male 123 128 140 139 
Nov. 3 female ere) 92 
Nov. 4-10 male P21 225 210 216 
female 105 104, 
11-17 male 114 113 139 135 
female 82 Bh. 
' 16-24 male 54. 54 2bh 2b) 
female 19 19 
Nov. 25- male 162 163 208 209 
Dec. 1 female 78 78 
Dec. 244 male 121 122 133 134 
female 91 91 
9-15 male LOL 101 198 198 
female 51 51 
16-22 male 124 12h 188 18% 
female 66 66 
23-29 male 64, 64, 173 173 
female 37 37 
Dec. 30~ male LOT 107 223 223 
Jan. & female 48 LB 

~104- 
