94 
It is evident that population fluctuations during the summer of 1954 were 
quite erratic although the general trend of a pre-breeding high to a breeding low toa 
post-breeding high is discernable. These fluctuations can be explained, in part at 
least, by the shifting of concentrations of molting baldpates, the utilization of a 
accessible molting waterfowl and com lets with banding operations. 
The somewhat higher Svecding population of 1954 was apparently due toa 
substantially increased redhead population (76.6 percent increase over 1932) and 
Slightly higher numbers of canvasback and mallards. 
Production 
The results of the two brood counts conducted with outboard motor and 
canoe are as follows: 
July 26 - 30, 1954 August 5 - 11, 1954 
Age Total Total Age Total Total 
Class Broods Young Class Broods Young 
I (a-b) 7 36 I (a-b) 6 35 
II (b) 5 20 II (b-c) 3 19 
Ill - = III - - 
Total 12 56 Total 9 54 
Calculated production combining elements of the second survey not seen on 
the first with the first: 



Broods Young 
7. + Combined Surveys 83 
X6 Conversion Factor X 6 
“102 498 
+4 Seen off Transect +24 
106 522 
Average Brood Size = 4. 92 
Data from previous years are available (see Table II), but they are probably 
not directly comparable (with the exception of 1953) because of inconsistent sampling 
methods. 
