TABLE B-8. - -Waterfowl brood and late nesting indexes by stratum compared with 
previous year and long-term average, southern Alberta, 1965 
[Index numbers in thousands; T = trace] 
Stratum 
Total 
Average 
1956- 
1965 
Percent change 
from— 
A 
B 
C 
1964 
1965 
1964 
Average 
Broods: 
Duck brood index -j- 
31 
60 
16 
189 
107 
221 
-43 
-52 
Average brood size 1 
6.1 
6.4 
5.5 
6.2 
6.1 
5.9 
NC 
+ 3 
Coot brood index- 
2 
14 
11 
18 
27 
45 
+50 
-40 
2 
Late nesting index 
Dabblers: 
Mallard- 
4 
5 
3 
3 
12 
5 
Gadwall-- 
3 
4 
1 
1 
8 
2 
Widgeon- 
2 
2 
1 
1 
5 
1 
Green-winged teal— 
T 
T 
— 
— 
T 
T 
Blue-winged teal- 
2 
2 
3 
T 
7 
2 
Shoveler- 
2 
4 
2 
2 
8 
2 
Pintail..— 
4 
2 
2 
T 
8 
1 
Subtotal- 
17 
19 
12 
7 
48 
13 
+586 
+269 
Divers: 
Redhead - 
1 
1 
T 
T 
2 
1 
Canvasback- 
T 
T 
T 
— 
T 
T 
Scaup- 
5 
7 
2 
3 
14 
7 
Ring-necked duck — 
— 
T 
— 
— 
T 
T 
Goldeneye- 
— 
— 
— 
— 
-- 
T 
Bufflehead- 
— 
— 
— 
— 
T 
Ruddy duck- 
1 
4 
-- 
1 
5 
3 
Subtotal- 
7 
12 
2 
4 
21 
11 
+425 
+91 
Total.. 
24 
31 
14 
11 
69 
24 
+527 
+188 
Class II and in broods only. 
2 
As indicated by adult pairs and singles. 
46 
