Table Z = Water Areas on Aerial Transects, May 1957 
Stratum A Stratum B Stratum C _.- Province 
Six-Yr,. Six-Yr, : Six-Yr. Six-Yr. 
_______—sCAverage (1957 Average 1957 Average 1957 Average 1957 _ 



Estimated 
Ponds 358186 186667 568023 442270 131661 81595 1057878 710532 
Percent ; 
Change -48 =22 ~38 -33 

Table 3 = Water Areas on Aerial Transects, May and July, 1957 
Stratum A Stratum B Stratum C  __ Province 
May J uly May J uly May J uly May J uly 
Total Ponds . 
Seen 2225 1429 3203 2082 433 224 5861 3735 
Ponds Per 
Square Mile 8.45 5.43 16.88 11.01 -25,06 2.62 11.05 6.94 
Loss =~ 36% - 34% ~48% -37% 

Breeding Population Indices 
Comparisons of breeding populations in 1956 and 1957 are 
given in Tables 4 and 5. Table 4 gives a comparison of the current season 
with last year while Table 5 compares this season with the six-year 
average. Ona Provincial basis, there has been no change in over-all 
breeding populations, There was, however, a shift of ducks from the dry- 
ing Strata A and C to the more favorable parkland area (Strata B). Strata 
A and C respectively, show a loss of 10 percent and 27 percent from 1956 
populations and a lost of 10 percent and 33 percent compared to the six- 
year average. Conversely, Stratum B reflected an 18 percent and 28 
percent increase. This increase in the parklands was sufficient to nullify 
the losses in the other strata. 
22 
