NEBRASKA - Continued 
Table 1. 1959 Waterfowl Copulation Indices 

Bastern Central Western Total 
— See en 



Square miles in study area 
Stratum A 3,859 2, 02h hy 186 10, 869 
Stratum B 734 1, 815 a, 814 Dy 363 
Observed ducks/sq. mile 
Stratum A 6.74 8.51 9.97 
Stratum 3B 0.75 0.92 1.47 
Aerial survey index* 26,561 25,702 45,871 98,134 
Perent non-breeders 15.7 5.1 16.3 
Breeding duck index 22,408 2h,385 38,407 85,200 
Percent lone males 22.3 15.0 9.4 
Hen-on-nest correction 5, O41 3,356 4,273 ©6114, 070 
Corrected breeding duck 
indices 28,349 28,023 43,402 99,774 


* Ducks per square mile x square miles in study area. 
Table 2. Waterfowl Breeding Population Trends 


1959 aerial index 98.134 
1958 aerial index 173,805 change to 1959 ~ th 0% 
Average, 1955-58 
aerial indices 128,452 change to 1959 - 23.6% 
1959 breeding duck index* 99,774 ! 
1958 breeding duck index 176,376 change to 1959 - 43.4% 
Average, 1955-58 breeding 
duck indices 117,035 change to 1959 - 9,8% 

92 
