2 
SOUTHERN ALBERTA - Continued 
Table I. Water Areas on Aerial ‘transects - Alberta 
Stratum A Stratum B 
May July th ow ae We Gn a ep 
Average 1957 __195€ Average 1957 1958 Average 19571955 Average 105771050 
Total Ponds ae eg ae es eee ee Cr ae a 
Seen 2225 3036 1k29 © 1622 3203-3118 2082 2043 
Ponds Per SE Sn Ry Rea a ae a 
Square Mile 815 11.56 543 6.16 16.9 16.50 11.01 10.81 
Index 343404 186647 254720 230837 119893 136086 548400 42334 b30596 355269 28752 282138 
Percent 30% #13 - 3 =) 
Change ~ 26%% - 4 ~ 21 een 



Stratum C Province 
May July ae May July 
Average 1957 1950 Average 1957 1950 Average 1957 1955 Averase 1957 1950 
Total Ponds 
Seen 433 638 224 281 5061 6792 3735 3946 
Fonds Per 
Square Mile 5.06 7.46 2.02 3.29 ek -d2.030,, 6.94 7.34 
Index 130027 81595 120225 79340 Wohiy 52952 1021173 705992 805541 665434 hhoses 471176 
Percent r L7* 7 25 Z 14 7 5 
Change - Tk* = 33 ee - 
* Percent change from previous year. 
*¥ Percent change from average. 
AVMATA OLA OVd 
