16 
(continued) 
Table XI - Transition Zone between Mackenzie and Anderson Rivers, N. W. T. 



1948 1949 1950 1951 1952 
Ducks per square mile 12.4 8.9 13.2 17.0 25.6 
Est. breeding pop. index 31,000 22, 250 33,000 42,500 64, 000 
% change from previous year - 28 + 48 + 29 +50.6 
Swans per square mile ; 3 4 12 3 .8 
Est. breeding pop. index 750 1,000 500 750 2,000 
% change from previous year + 33 ~ 50 + 50 + 167 
Canada geese per square mile - - - 21s el 
Est. breeding pop. index = ~ - 325 250 
% change from previous year - - - ~ 23 
Table XII - Old Crow Flats, Yukon Territory * 
1948 1949 1950 1951 1952 
Ducks per square mile 56.2 38.0 43.0 71.1 65.5 
Est. breeding pop. index 112,400 76,000 86, 000 142, 200 131,000 
% change from previous year - 32 + 13 + 65 - 8 
Swans per square mile - - - 12 0.1 
Est. breeding pop. index - - ~ 240 200 
% change from previous year - - - - 17 
Geese per square mile | z.4 2.2 1.8 43 . 33 
Est. breeding pop. index 4,800 4,400 3,600 860 660 
% change from previous year - 8 - 18 - 76 - 23 
Percent Species Composition, 1952 
Species - Percent Species Percent 
scoters 51,3 Baldpate z2.0 
Old squaw 24.1 Merganser 0.1 
Scaup 13.5 Mallard 0.1 
Pintail 8.9 
* Estimated area 2,000 square miles. 
Table XIII - Brant and Goose Populations on the Deltas of the Mackenzie, 
Kugaluk and Anderson Rivers, and Cape Dalhousie 
1948 1949 1950 1951 1952 
Snow geese 7, 320 2,943 5,390 7,360 9,489 
Black brant 2,377 2,510 2,004 1,294 3,147 
White -fronted geese 901 825 1,112 120 8 
Canada peese 596 567 62 “ 
