G2 
Table 10. -- The Influence of Size of Type A 1 Potholes on Use by Broods 

Pothole Size (Acres) 
Species 0.0 to 0.5 to 1.0 to 1.5 to 2.0 to 2.5 to 3.0 to 3.5 to 
0.49 0.99 1.49 1.99 z.49 2.99 3.49 3.99 
(2)* (5) (4) (6) (2) (2) (1) (3) 
Mallard 
Brood-days per pothole 0 12.0 3,0 10,7 7.0 ° 20.8 9.5 11,3 
Brood-days per acre 0 16.7 2.4 6.0 3.2 8.1 3.2 3.0 
Pintail 
Brood-days per pothole 0 1.6 6.4 1.8 11.0 4.5 3.0 12.0 
Brood-days per acre 0 2.2 5.0 1.0 5.0 1.8 1,0 3.2 
Blue-winged teal 
Brood -days per pothole 0 0.0 4.6 13.0 17.5 17.0 30,0 7.0 
Brood-days per acre 0 0.0 3.6 7.4 8,0 6.7 10.0 1.8 
Baldpate _ 
Brood-days per pothole 0 4.0 13.3 1.3 5.5 22.5 12.0 30.7 
Brood-days per acre 0 5.6 10.6 0.8 2.5 8.8 4,0 8.1 
Redhead | 
Brood-days per pothole 0 0.6 0.0 0.5 4.0 32.0 11.0 12.5 
Brood-days per acre. 0 0.8 0.0 0.3 1.8 12.6 3.7 3.3 
Canvasback 
Brood-days per pothole 0 2.0 z.8 2.3 31,0 25.3 27.5 21.2 
Brood-days per acre 0 z2.8 2.2 1.3 14.1 9.9 9.2 5.0 
a 
* Number in parentheses indicates number of potholes. 
