Table IV, - Aerial Production Data - 1953 - 1954. 



: Strata A : Strata B : Strata ¢ : Province : 
: 1953 : 1954 ;: 1953 : 1954 : 1953 ; 1954 : 1953 : 1954 : 
Area ‘4 ¢ ‘ . : : : : : 


22088 ; 26100 : 
26100 




. Mi. : 22088 : 
Sample : 
- Mi. 
16112 : 16112 : 64300 : 64300 :, 
7244.85 :263.25 :177.575: 184.5 : 85.5 :501.275 : 533.25 : 




Tot. Broods: ; : 4 : : : : : 
Seen : 763 : 1349 : 514 ; 605 : 100 ;: 96 : Lov? : 2050 : 
Brds/ $q. Mi: : : : : : : : : 
Seen * 8.12 2 5.12% 2.89 : 3,28 : 1.2653 1.12: 2.74 ; ro ty ges 
Est. No. ; ; : : : : : : ‘ 
Brds Seen : 68915 :113091 : 75429 : 85608 : 20301 : 18045 : 164645 : 216744 : 
Pot. later : : : : 7 : : : : 
Brds.* : 332: 214: 74: #172 : 126: 41: 532 : 427 : 
Pot. Brds/ : 4 : 2 ; : : : : 
‘ : : 0.78 

Pot. later : 
Brds. : 29818 
Tot. Ind. : : : : : : 
Brds. : 1095: 
17891 : 10701 : 24273 : 25939 : 7734 : 66458 
ee eefee 6 
49818 

1563 ; O88 : AK a 137 : 1909 ; 2477 
226 3 



Mi. Ind. : 4.47 : 5.93 : 3,30 : 4.21 2.87 : 1,60: 3.88 : 4.15 : 
Est. No. : : : : ; : : : ; 
Brds. Ind. : 98733 :130982 : 86130 :109881 : 46240 : 25779 : 230782 : 266642 : 
Aver. Brd. ;: : : ; : ‘ : ; : 
Size s 6,47. :.°5.59. 3 5.71 +. 5.78: 4.60 : -5.25 * 5.0L. * 5.64 : 
Est. No. : : : : ; : : : : 
Youn, :540070 :732189 :491812 :634912 :221957 :135340 :1252293 :1503861 : 

* Potential later broods. This figure is derived by tallying the pairs, 
lone males and lone females present on the transect in July. 
For the purpose of comparison with 1953 figures we assume 
that each pair, male or female represents a potential brood and 
that it will hatch. As this is impossible, we know that this is 
an inflated figure. In a year such as this, however, we may 
estimate that between 60 and 75 percent would be successful. 
The delayed nesting season, good water conditions (except in Stratum C) and 
a large breeding population have all combined to make 1954 a 'first hatch’ year in 
Alberta. Beginning June 1, the prairie hatch was sudden and spectacular and by 
June 15 the hatch was general throughout the parklands. By mid-July, during the 
brood survey, about 90 percent of all broods observed were of either Class II or 
III size. The remaining 10 percent were primarily Class I broods of blue-winged 
teal, scaup and other late nesting species. Brood sizes were somewhat smaller 
than the long-time average in all strata but an increase in numbers of broods raised 
the brood index 12 percent above the average and 11 percent above 1953. 
