240 

Table I. - Nesting Efforts Per Census Unit - Waterfowl Nesting Survey in Missouri 
May 10 to June 10, 1954. 



Broods Total Nesting 
4931 Acres of Lone Lone Total Young / Nesting Effort Per 
Lake and Marsh Drake Hen Pairs No. Young Brood Effort Square Mile 
Wood duck 17 2 10 5 29 5.8 34 4.4 
Mallard 11 0 5 Z 21 10.5 18 2.3 
Blue -winged teal 0 0 3 0 0 0 3 .4 
Lake and Marsh Totals 28 2 18 7 50 9.1, 55 7.2 
581 Miles of Stream 
Wood duck 42 25 33 26 164 7,1 129 2d 
Mallard 6 6 0 2 13 6.5 14 . 02 
Blue -winged teal 24 10 24 0 0 0 58 -10 
Stream Totals” 72 41 57 28 177 6.3 201 | 35 
Grand Total 100 43 75 35 227 6.5 256 - 
Table Il. - Wood duck, Mallard, Blue-winged teal Trend Data - Waterfowl Nesting 
Surveys - Missouri, 1953-1954. 
1953 1954 Percent Change 
Acres of lake and marsh censused 4976 4931 - 
Nesting effort per square mile 10.5 7.2 -31 
Miles of stream censused 371 581 - 
Nesting effort per mile of stream 43 35 -18 
Number of broods observed 45 35 -22 
Number of young observed 215 227 + 6 
Average young per brood 4.8 6.5 +35 
ey SS SS 9 rs Sf en 
