
Table 3. May Waterfowl Population Indices ~ Southern Manitoba - 
Aerial Survey 
Stratum "A" Stratum "Bp" Strata "A" & "BR" 
Pairs &® Flocked Pairs & Flocked Paris & i#Flocked 
Year Drakes Ducks Drakes Ducks Drakes Ducks 
1951 472, 800 165, 900#* 638, 700% 
1952 343,200 177 , 300 520,500 . 
1953 209, 400 151, 600 361, 000 
1954 317,100 228, 300 545, 400 
1955 345,100 oh 200 769, 300 
1956 417,200 499,600 916,800 
1957 420, 300 hho ,ooo 860, 300 
1958 561,900 145,000%* 394,900 153,800%* 956,800 298, 800%* 
1959 349,900 gh, 500%* 331,300 128,600%* 681,200 223,100%* 
Average 
381, 900 312, 500 69h, 400 
1951-59 

* Stratum "B" data not corrected for absent hens in 1951. 
*#* Flocks of drakes and hens of species normally breeding in the 
area and not assumed to be migrants. 
118 
