— - - = — —_—- — -— = 
Table II - Data Obtained by Use of 1/8-Mile Wide Aerial Transects and Sampling the Various Ecological Strata 



Separately 
Size of Ducks Observed , Ducks Observed 
Strata or Area in Sample in in sample per Sq. Mile Population Index 
Types Sq. Mile Sq. Mile Broods Pairs Broods Pairs* Broods Pairs 
Atlantic Slope 784.9 98.1 4 } T T 80,05 80.05 
Estuarine Marsh 
Unditched 177.4 22.2 7 109 31 4.92 54.99 872.81 
Estuarine Marsh, 
Ditched 62.6 7.8 0 5 0 0.64 0 40.06 
Coastal Marsh, 
Ditched 40.6 5.1 0 5 0 0.98 0 39.79 
A 
Total 135.04 1032.71 
* Singles observed were considered as pairs for this computation. 
T62 
