Table IV - Aerial Production Data -- 1951-1952 
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STRATA A STRATA C STRATA B 
(Prairie) (Short Grass Prairie) (Parklands) PROVINCE 
1951 1952 1951 1952 1951 1952 1951 1952 
Survey Area 
Square Miles 22,088 22,088 16,112 16,112 26, 100 26,100 64, 300 64, 300 
Sample Area 
Square miles 266. 31 240.7 114.12 82.57 118.31 174.3 -- -- 
Total Broods Seen 718 1,231 67 331 281 445 -- es 
Broods per Sq. Mi. 2.69 5. El 58 4.00 2.37 2.55 2.03 3.79 
Est. Number of 
Broods 59,417 112,870 9,345 64,448 61, 857 66, 555 130, 619 243,873 
Average Brood Size 
(from ground check) 6.38 6.81 6.38 6.81 7.12 6. 81 6.73 6.81 
Est. Number of 
Ducklings 379, 080 768, 645 59,621 438, 891 440,422 453, 240 879,123 1,660,776 
Strata A and C together make up all prairie. 
Table V - Population and Production Comparisons -- 1951-1952 
Population Per Square Mile Percent Broods Per Square Mile Percent 
1951 1952 Increase 1951 Increase 
Strata A 23.47 27.45 16.9 2.69 89.9 
Strata B 15. 66 17.56 12.1 a, 37 7.6 
Strata C 10. 43 16. 43 57.5 .58 589.6 
Province 17.03 20.67 21.4 2.03 86.7 
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