TABLE D-21. — Age ratios of black duck determined from wing collections, during 
hunting seasons 1960-61, 1961-62, 1962-63, and 1963-64 
Location of kill 
Numbe 
>r of— 
Wings received 
Immatures per adu] 
t 
1960-61 
1961-62 
1962-63 
1963-64 
1960-61 
1961-62 
1962-63 
1963-64 
Mississippi Flyway: 
Minnesota- 
50 
8 
44 
42 
2.3 
— 
3.0 
6.0 
Wisconsin- 
114 
89 
220 
156 
3.4 
3.5 
1.7 
1.5 
Michigan- 
216 
200 
338 
261 
2.0 
2.5 
1.6 
1.3 
Iowa- 
8 
3 
5 
11 
— 
— 
— 
— 
Illinois- 
30 
52 
48 
50 
2.0 
1.4 
1.5 
1.0 
Indiana —------ 
141 
55 
57 
87 
1.2 
1.1 
1.7 
1.1 
Ohio- 
207 
62 
110 
194 
1.2 
1.5 
1.3 
0.7 
Missouri- 
14 
4 
3 
9 
— 
— 
— 
— 
Kentucky-- 
141 
126 
96 
67 
1.1 
1.0 
1.1 
0.7 
Arkansas - 
27 
8 
3 
11 
2.0 
— 
— 
— 
Tennessee- 
241 
67 
85 
161 
1.3 
1.0 
1.2 
0.9 
T/MiiHiflna —-—-- 
13 
3 
19 
19 
— 
— 
— 
— 
Mississippi- 
32 
7 
11 
11 
2.6 
— 
— 
— 
Alabama- 
41 
9 
75 
108 
1.9 
— 
0.7 
0.5 
Flyway weighted ratio 2 
— 
— 
— 
— 
1.83 
2.04 
1.49 
1.11 
Atlantic Flyway: 
Maine- 
878 
379 
564 
797 
3.0 
1.8 
1.7 
2.1 
Vermont- 
233 
186 
232 
237 
5.5 
3.8 
3.5 
4.6 
New Hampshire -- 
71 
72 
193 
195 
4.9 
3.5 
2.8 
3.4 
Massachusetts- 
636 
329 
566 
639 
2.2 
1.8 
1.6 
1.8 
Connecticut- 
183 
122 
294 
209 
2.4 
2.1 
1.6 
3.2 
Rhode Island- 
159 
93 
204 
255 
1.9 
1.0 
1.1 
1.7 
New York- 
435 
418 
524 
613 
2.7 
2.3 
1.6 
2.2 
Pennsylvania- 
163 
73 
277 
251 
3.0 
0.6 
1.2 
1.4 
West Virginia- 
66 
26 
65 
60 
0.6 
0.9 
0.4 
0.7 
New Jersey-- 
1,132 
712 
1,152 
1,157 
1.9 
1.6 
1.0 
1.1 
Delaware- 
200 
122 
259 
276 
1.2 
2.0 
1.6 
1.4 
Maryland- 
378 
131 
557 
396 
1.4 
2.2 
1.0 
1.1 
Virginia- 
161 
148 
247 
277 
1.6 
1.1 
1.0 
1.1 
North Carolina- 
228 
59 
93 
104 
1.5 
1.7 
1.0 
1.1 
South Carolina- 
46 
53 
54 
95 
1.6 
1.0 
1.1 
1.4 
Georgia- 
2 
_1 
8 
20 
— 
— 
— 
0.7 
Florida--- 
25 
24 
25 
47 
4.0 
3.0 
2.1 
1.9 
Flyway weighted ratio 2 -- 
— 
— 
— 
— 
2.11 
1.75 
1.32 
J - 51 . 
Continental United States weighted ratio 2 
2.00 
1.82 
1.35 
1.38 
^Ratio not shown if based on less than 20 wings. 
2 
In estimating Flyway and United States ratios, the ratio for each State was weighted in proportion 
to the estimated size of the kill in that State. 
135 
