MISSISSIPPI FLYWAY 
Breeding Ground Surveys 
SOUTHERN MANITOBA 
Weather and Water Conditions - 
Water was more abundant in southern Manitoba during the spring 
of 1955 than during any year since the surveys began. Precipitation during 
May was normal, but with the already wet ground it was enough to retard 
agriculture but not duck production. Precipitation continued during June and 
July sufficient to maintain the high water conditions which prevailed during 
May. 
Breeding Population Indices - 
Table 1 shows the May population indices for the past five years. 
The indices for 1954 and 1955 have been corrected for scaup in flocks that 
were considered to be non-breeders and may or may not have been migrating 
farther north. 
Table 1 - May Waterfowl Population Indices - Southern Manitoba - 
Aerial Survey 
Stratum "A?! Stratum ''B!! Stratum "A'"' & 'B" 
Year (10, 368 Sq. Mi.) (28, 600 Sq. Mi. ) ‘38,968 Sq Mi.) 
1951 472, 800 165, 900* 639, 700+ 
1952 343,200 143, 300* 486, 500°: - 
1953 209, 400 117, 300+ 326, 700* 
1954 325,600 225,900 551,500 
1955 403, 900 424,200 828 100 
% Change 
1954-55 + 24% + 88% + 50% 

* Data uncorrected for absent hens in these cases 
The species composition of the May population for 1954 and 1955 
is shown in Table 2. 
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