PACIFIC FLYWAY 
Production Index 
Aerial Production Data - 1952-1953 

Stratum A . Stratum B Stratum C Province 





1952 1953 1952 1953 1952 1953 1952 1953 
Survey Area 
Sample Area. i. 
___Sq- Mile 240.7 244, 85 174,3 177.575 82.57 78.85 497.57 501.275 
Total Broods - ie = | } 
Seen 1,231 763 445 514 331 100 Zz,007 1,377 
Total Broods : | 
Indicated |. ala a 1, 231 1,095 445 588 331 226 2,007 1,909 
Broods per Sq. Mile See | 
Indicated : 5.11 4.47 2.55 3.30 4.00 Zz.85 4.03 3.88 
Est. Number of Broods | : ; 
Indicated 112, 870 98,733 66,555 86,130 64,448 45,019 243,873 230, 782 
Average Brood , . ; 
Size , 6.81 | 5.47 6.81 5.71 6.81 4,80 6.81 5.91 
Estimated Number of | | | 
Ducklings 768, 645 540,070 453,240 491,812 438,891 220,411 1,660,776 1,252,293 

