Figure I. Trends in Waterfowl Production along a Transect 58 miles 
In length located in the Coteau Region of North Dakota 
NUMBER OF BROODS 
90 - 
87 
84 
81 
78 
75 
72 
69 
66 
63 
60 
57 
54 
5] 
48 
45 
4? 
39 - 
36 
33 
30 
27 
24 - 
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a eee CMWONHTODONT OMOA—-MNNHKRA-—MNEO—MNnrD 
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