Table II. - Aerial Census of Waterfowl Production - Alleghany Stratum 
Size of Size of 
Size in Size in Sample Sample Ducks Observed Ducks Observed Production 
Sq. Mi. Linear Sq. Mi. L. Mi. in Sample / sq. or L. mile Index 
Type Year 2 Miles ** (1) (2) Broods Pairs Broods Pairs Broods Pairs 
Transect 1951 18, 924 - 67.9 e 7 4 0.10 0.06 1, 892 1,135 
1952 (3) 18,924 - 67.9 - ] 2 0.01 0.03 189 568 
1953 17, 924 - 67.9 - 1 7 0.014 0.10 251 1,792 
Lakes 1951 - 498 - 39 ] 0 0.03 0 15 0 
1952 (3) - 498 - 39 2 ] 0.05 0.03 25 15 
1953 - 473 - 39 0 2 0 0.05 0 25 
Rivers 1951 - 664 - 131 8 1 0.06 0.01 40 7 
1952 (3) - 664 - 131 2 3 0.02 0.02 13 13 
1953 - 664 - 147 7 3 0.06 0.02 40 13 
5 ee ai fe SSP SP SS SS i Se 
* 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, 
S22 
