Table Il. - Physiographic Distribution of the Breeding Waterfow1 Population and 1954-1955 Trends. 
Uncorrected 
Physiographic Ducks/Sq. Mi. Corrected* Ducks/Sq. Mi. Est. Minimum Pop. % State-wide Population 
Division 1954 1955 1954 1955 Change 1954 1955 1954 1955 _— Change 
Minnesota Valley, 10.14 5.45 12.37 6.43 - 48% 15,000 8, 000 2% 2% - 
Prairie Hills 18. 31 9.28 22.34 10.95 ~ 51% 181,000 88, 000 22% 24% + 2% 
James River : 
Valley 16.87 5.89 20.58 6.95 - 66% 387,000 130,000 47% 36% - 11% 
Missouri Hills 11.71 5.16 14.29 6.09 - 57% 108,000 45,000 13% 13% - 
Missouri Plateau 2,83 1.95 3.45 2.30 - 33% 135,000 89,000 16% 25% + 9% 
State-wide ** 8. 89. 4.08 10.85 4.81 - 56% 826,000 360,000 100% 100% 
a 
* Corrected from ground transect data to compensate for unobserved females on nests. 
Corrected by 1. 22 in 1954 and 1.18 in 1955. 
** Based on twice the number of ducks observed and twice the number of square miles of 
the reduced Missouri Plateau coverage. 
T6T 

