
Considering the factors that affected both the waterfowl breeding 
population and the aerial survey, it is believed that the eastern Canada waterfowl 
breeding population was about the same as last year. 
Production Indices - 
For comparative purposes all the duck broods, complete, incomplete, 
unclassed, and unidentified were used to compute the data used in Table 1. This 
was done for comparative purposes with last year's data and also to give us a 
total brood and young duckling production. 
The average brood size in 1955 was 
4.62 as compared to 4.35 in 1954, indicating an increase of 6 percent in brood 
size. Comparing total young produced, we find it is down 21 percent from last 
year. Noting in our breeding pair count in May and June a decline of 23 percent, 
a reduced production of 21 percent was not unexpected. 
Table 1 - Duck Brood Production Indices, Quebec and Labrador - 1955 
Class I 
No. Broods 
Aver. Size 
No. Young 
Class [I 
No. Broods 
Aver. Size 
No. Young 
Class III 
No. Broods 
Aver. Size 
No. Young 
Totals 
No. Broods 
Aver. Size 
No. Young 
Mixed 
Boreal 
0 
0 
0 
i=) 
i) 
i) 
Main 
Boreal 
0 
=) 
0 
5,962 
5. 83 
34, 759 
6,953 
4.14 
28, 785 
12,915 
4.92 
63, 544 
Open Boreal 
and Forest 
Tundra 
285 
7.00 
1,995 
12,525 
4.50 
56, 363 
3,131 
3.67 
11,491 
15,941 
4.38 
69, 849 
Total 
1955 
285 
7.00 
1,995 
18,487 
4.93 
91,122 
10, 084 
3.99 
40,276 
28, 856 
4.62 
133, 393 
Total 
1954 
12,890 
4.58 
59, 080 
17,207 
4.27 
73,423 
8,462 
4.18 
35,409 
38,559 
4.35 
167,912 
Percent 
Change 
~ 98 
- 98 
+ 19 

Note: Above data based on adjusted broods. 
broods in ratio to complete classed broods. 
Stratum in 1955. 
data for that year for comparative purposes. 
Includes incomplete and unclassed 
No transects run in Tundra | 
1954 figures have been corrected by omitting Tundra 
