LL 
Table 2. Breeding Population Indices by Strata in North Dakota, South Dakota, and 
Minnesota in 1959 and Comparison with 1958 (Cont'd) 
, TRI-STATE AREA 



‘Total 59 ~—=—=—“‘“‘<=~*#*«r al 58 a Chance 
Stratum Size (sq. mi.) | 181,631 = 4 
Sample Size (sq. mi.) 1097.0 - = 
Expansion Factor - - _ 
Population Index (sample) 
Population Index (total) 414,187 951, 647 -56 
Species Composition : 
Pintail ' 21,645 217, 469 ~90 
Mallard 166, 602 419,802 -60 
Baldpate 28,785 11,611 £148 
Shoveler | 21,005 57,870 -64 
Gadwall 7,271 29 , 800 -76 
BW Teal 127,155 165, 339 -23 
GW Teal : - 909 -~ 
Seaup 24,915 8,026 #210 
Canvasback 10, 349 23,429 ~56 
Redhead 2,280 9,405 -76 
Ruddy 4,180 , 7,987 -L8 
Total 1959 ; 41h 187 
Total 1958 i 951, 647 
Percent Change -56 
Coot 1959 87,915 
Coot 1958 30, 140 
cc nn a SAO SI Snel ESS SSCS ena =epa assesses gSNSSSNSDNSNe roel reas =P Sen anjuren en SSRN SSS rs 
Percent Change #192 

