TABLE B-61. —Wood duck nesting effort and production data 
Missouri, 1964 and 1965 
1964 
1965 
Percent change 
from— 
1964-1965 
Lake and marsh censused (acres)- 
10,955 
7, 020 
-35.9 
Stream censused (miles)- 
730 
557 
-23. 69 
Wood duck: 
Nesting effort: 
Per square mile of lake and stream - 
6.0 
10.9 
+81.7 
Per mile of stream- 
.30 
.32 
+ 6.67 
Number of broods (stream)- 
105 
96 
- 8.57 
Broods per mile (stream)- 
.14 
0.17 
+21.4 
Number of broods (marsh)- 
25 
13 
-48.0 
Broods per square mile (marsh) 
1.5 
1.19 
-20.66 
Average number of ducklings: 
Class I- 
6.5 
6.28 
- 3.38 
Class II- 
5.5 
5.3 
- 2.46 
Class III- 
4.2 
5.4 
+28.09 
All classes- 
5.4 
5.6 
+ 3.88 
Mallards and blue-winged teal: 
Nesting effort: 
Per square mile of lake and marsh - - 
2.4 
1.3 
-45.8 
Per mile of stream- 
.02 
.055 
+180. 
TABLE B-62.--Number of water bodies, southwest Manitoba, 1964 and 1965 
Percent change from- 
Area 
1964 
1965 
1964-1965 
Streams----- 
45 
63 
+40 
Dugouts- 
52 
39 
-25 
Field (sheet) water —- 
344 
225 
-35 
Other - 
1, 647 
1,307 
-21 
Total. 
Water areas (per sq. mi.)- 
2,088 
26.9 
1,634 
20.7 
-26 
84 
