Table 2. Breeding Population Indices by Strata in North Dakota South Dakota, and 
Minnesota in 1959 and Comparison with 1958 (Cont'd 
SL 

_SOUTH DAKOTA 
West Central East 159 Total "50 Total 
a 
Stratum Size (sq. mi.) 26,598 25,591 21,481 73,670 
Sample Size (sq. mi.) 130.5 358.0 68.5 S57 = 
Expansion Factor 203.8 ya 313.6 = es 
Population Index (sample) 205 928 142 2 . 
Population Index (total) 41,779 66, 352 hh 530 152 661 48h , 500 
Species Composition 
Pintail 1,838 3,981 1,692 7,511 127, 600 
Mallard 24,817 18,977 18,480 62,274 236,650 
Baldpate - 2, 322 = 2,322 - 
Shoveler 2,423 6,038 2,538 10,999 35,800 
Gadwall - - - - 2, 300 
BW Teal 12,701 28,797 18,480 59,978 70,350 
GW Teal - - - oo. - - 
Scaup - 4,180 3, 340 7,520 3,520 
Canvasback - 2,057 - 2,057 - 
Redhead = ~ - - 3,600 
Ruddy : - - - 4,650 
Total 1959 41,779 66, 352 4h, 530 152,661 4 
Percent Change -67 “71 -65 = -68 
Coot 1959 3,464 1,216 627 5,307 - 
Coot 1958 0 1,263 ahs - 1,511 
Percent Change ~ 153 251 
