TABLE B-53. — Waterfowl brood and late-nesting indexes, by stratum compared with 
previous year and* long-term average, southern Manitoba, 1964 
[ Index numbers in thousands] 
Species 
Stratum 
Total 
Average 
1954 to 
1963 
Percent change from 
Previous 
year 
Average 
A 
B 
1963 
1964 
Broods: 
Duckbrood index - -- 
12.2 
13.0 
32.3 
25.2 
34.5 
-22 
-27 
Average brood size 1 - - 
5.4 
4.5 
5.4 
5.0 
5.6 
-8 
-11 
Coot brood index- 
8.5 
4.3 
3.5 
12.8 
7.2 
+266 
+78 
Late-nesting index 2 : 
Dabblers: 
Mallards- 
4.7 
4.3 
13.3 
9.0 
16.5 
-32 
-45 
Gadwall- 
0.7 
— 
2.1 
0.7 
1.3 
-67 
-46 
American widgeon- 
1.2 
— 
4.3 
1.2 
3.2 
-72 
-62 
Green-winged teal- 
0.1 
— 
0.1 
0.2 
0.5 
-50 
-80 
Blue-winged teal- 
2.1 
3.2 
2.6 
5.3 
7.8 
+104 
-32 
Shoveler- 
0.4 
5.1 
0.2 
5.5 
0.8 
+1750 
+588 
Pintail-- 
0.3 
— 
2.2 
0.3 
2.5 
-86 
-88 
Subtotal-- 
19.5 
12.6 
24.9 
22.1 
32.6 
-11 
-32 
Divers: 
Redhead - 
0.4 
1.4 
0.7 
1.8 
1.5 
+157 
+20 
Canvasback - 
0.3 
— 
1.1 
0.3 
1.2 
-73 
-75 
Scaup - 
2.5 
— 
1.7 
2.5 
3.4 
+47 
-26 
Ring-necked duck- 
— 
— 
0.2 
— 
0.7 
— 
— 
Goldeneye - 
0.1 
— 
0.2 
0.1 
0.3 
-50 
-67 
Bufflehead- 
0.1 
— 
0.2 
0.1 
0.5 
-50 
-80 
Ruddy duck- 
5.2 
1.1 
8.0 
6.3 
4.8 
-21 
+31 
Subtotal- 
8.6 
2.5 
12.1 
11.1 
12.4 
-8 
-10 
Miscellaneous- 
0.1 
— 
— 
0.1 
0.2 
+100 
-50 
Total ducks- 
18.2 
15.1 
37.0 
33.3 
45.2 
-10 
-26 
1 
2 
Class n and m broods only. 
As indicated by adult pairs and singles. 
84 
