
229 
Table Il. - Wisconsin Waterfowl Breeding Pair Trends .* 
Percent Change of 

Ave. Index 1954 1955 1955 Index From 
Species 1951 - 1954 Index % Lone M. Index % Lone M. Average 1954 
SS NN — a ne lg ars epg pps npr RS 
Mallard , 04 05 45 .04 54 None - 20 
B-w. Teal . 06 .09 21 » 08 38 + 33 - ll 
Black Duck . 005 . 008 - . 005 - None - 36 
Wood Duck . 006 . 009 39 . 006 19 None - 33 
Ringneck — Ol 01 65 . 01 37 None None 
Total .13 .18 28 15 - + 15 - 17 
/ a a a eee 
Average of 
1951 - 1954 1954 1955 
Adult coot observed per acre 04 .09 .08 
Percent Change of 1955 From +100 -11 = 
* Total estimated pairs based on pairs, lone males, lone fernales, and 
unidentified duck pairs and single ducks observed. Index figures 
are based on the number of pairs per acre sampled. 
Table Ill. - Comparison of Wisconsin Waterfowl Breeding Survey Figures, 1951-1955. 
Of Total Young 
Duck Flocked /Breed- 
Prs./ Indicated Ducks,% ing Indicated Average Indicated % Duck Prs. on 
Year Acre Change Female Pair Change Brood Size Change Brood Survey* 
1951 .O78 - 16% 1,46 - 6.5 - 43 
1952 -092 +418% 19% 2.58 +77% 6.6 +2% 42 
1953 .180 +96% 27% 2.35 - 9% 7.0 +6% 39 
1954 .180 None 35% 1.51 - 36% 7.0 None 41 
1955 .153 -15% 18% 1,88 +24% 7.4 +6% 47 

* Each duck pair is considered to represent a potential brood which may 
- appear after the brood survey is completed. The percentage 
fipure piven was computed by dividing the total number of adult 
ducks observed on the June survey by the total estimated number 
of pairs on that survey. 
