Table III. - Aerial Census of Waterfowl Production - Beech-Maple Stratum 
EC A I LC A I A te 
Type 
‘Transect 
Lakes 
Rivers 
Swamps 
Marshes 
Year 
1951 
1952 (3) 
1953 
1951 
1952 (3) 
1953 
1951 
1952 (3) 
1953 
1951 
1952 (3) 
1953 
1951 
1952 (3) 
1953 
Size of Size of 
Size in Size in Sample Sample Ducks Observed Ducks Observed 
Sq. Mi. Linear Sq. Mi. L. Mi. in sample / sq. or L. mile 
Miles ** (1) (2) Broods Pairs Broods Pairs 
5,628 - 14,3 - 2 0 0.14 0 
5,628 - 14,3 - 2 3 0.14 0.21 
9,912 - 26,0 - 10 3 0.38 0.12 
o 450 - 94 0 0 0 0 
_ 450 - 94 0 0 0 0 
a 159. - 20 2 2 0.10 0.10 
- 131 - 36 0 0 0 0 
- 131 - 36 ] 0 0,03 0.03 
- 460 0 85 4 aS 0,05 0.05 
7.8 ~ 0.9 - 0 0 0 0 
7,8 - 0.9 - 0 0 0 0 
23.7 - 2.8 - l 4 0.36 1,43 
31.4 - 6.5 - 17 1 2.62 0.15 
31.4 - 6.5 ~ 8 7 1,23 1,08 
47.9 - 7.2 - 33 17 4,58 2.36 
Production 
Index 
Brood Pairs 
788 0 
788 1,182 
3, 767 1,189 
0 0 
0 0 
16 16 
0 0 
4 0 
23 31 
0 0 
0 0 
8 34 
82 5 
39 34 
219 113 

* Includes only transects, Swamps and marshes. 
*%* Includes only shoreline of all major lakes and rivers. 
(1) Includes only random samples of transect area, swamps and marshes to give + 30 percent 
error. 
(2) Includes only random samples of shoreline of major lakes and river to give + 20 percent 
error for rivers; recommended minimum for lakes. 
(3) Figures for the July 2 to 14 flights only; also flown in 1952 on July 22-28, 
922 
