(continued) 
Table IX - Upland Tundra between Mackenzie and Anderson Rivers, N. W. T. 
—— nn eee a yas hy 
1948 1949 1950 1951 1952 
Ducks per square mile 35.4 — 32.6 32.8 46.2 17.5 
Est. breeding pop. index 187, 620 172, 780 173, 840 244, 860 92,750 
% change from previous year - 8 + 1 + 41 - 62,1 
Swans per square mile LZ 1.0 1.0 2.8 eis 
Est. breeding pop. index 6, 360 5,300 5,300 14, 840 4,080 
% change from previous year - 17 n.c. + 180 -72.5 
Canada geese per square mile oo - 04 .4 - 
Est. breeding pop. index 2,650 - 212 2,120 - 
% change from previous year -100 + inf. + 1,.000 -100 
White-fronted geese per sq. mile 1.9 .7 Z2.5 1.5 1.1 
Est. breeding pop. index 10,070 3,710 13,250 7,950 5,724 
% change from previous year - 63 + 257 - 40 - 28 
Table X - Coastal Tundra between Mackenzie and Anderson Rivers, N. W. T. * 


1948 | 1949 1950 1951 1952 
Ducks per square mile 11.5 12.4 17.0 11.3, 13.5 
Est. breeding pop. index 10, 350 11, 166 15, 300 10,170 12,105 
% change from previous year + 8 + 37 - 34 + 16 
Swans per square mile 1.6 1.7 1,8 1.3 2.3 
Est. breeding pop. index 1, 440 1,530 1,620 1,170 2,070 
% change from previous year | + 6 + 6 - 28 + 77 
White-fronted geese per sq. mile 2.0 0.3 es) 0.5 1.2 
Est. breeding pop. index 1, 800 270 2,250 450 1,080 
% change from previous year - 85 +733 - 80 +140 
Percent Species Composition, 1952 
Species Percent Species Percent 
Old squaw 44.6 Pintail 11.2 
King eider 28.6 Scaup 3.0 
Scoters 12.6 
* Estimated area 900 square miles. 
Table XI - Transition Zone between Mackenzie and Anderson Rivers, N. W. T. * 
Percent Species Composition, 1952 
Species Percent Species Percent 
Scoters 52.3 Pintail 2.4 
Scaup 32.8 Mergansers 1.0 
Old squaw 8.4 Mallard 0,4 
Baldpate &.7 
* Estimated area 2,500 square miles. 
