TABLE F-41.--Wood duck broods observed by stream section and age class, Indiana, 1963 
Number oe broods 











Percent 5-year 10-year 
























Stream 
on i change average average 
from 1962 1958-62 | 1953-63 
Maumee ~--s<-<-e= 6.7 
Elkhart----------- 3.7 
Troquois-----~-=== Be 
Minnissinewa---~-- hy 
Big Blue------<-<=-- 6.7 
White, West Fork-- 13.5 
Muscatatuck----<-- 36.3 
Salt Creekew-n-an- 10.2 
Eel River--------> 10.1 
Total------<----= gh..2 
Percent change from 1962------enn- nen nee wen nen ne ne ee een ene ee ot 
Percent change from 5-year average 1958-62---.---~--~-.--------~-.--~~--- . An 
Percent change from 10-year average 1953-62 +59.2 
Percent 
change 
from 
1962 



Lake and marsh censused (acres )-------- i + 13.2 
Streams censused (miles )--------------- + 58.0 
Wood duck: 
Nesting effort: 
Per sq. mile of lake and marsh 
Per mile of stream----------------- s : ; . ‘ + 3.1 
Number of broods (stream)---------- +130.1 
Broods per mile (stream)----------- 2 ; ‘ . : + 45.4 
Number of broods (marsh)----------- =- 
Broods per sq. mi. (marsh)--------- : . : : : -- 
Average number of ducklings in 
Class [+------cennnee cnn en cenen= -- 
Class IIl------<00--22 7 eer nerer--= -- 
Class [Il I--<--------------ercenen- t . S -- 
All classes---+---+---<--<--------- . . . . : -- 
Mallard and blue-winged teal: 
Nesting effort: 
Per sq. mi. of lake and marsh------ » x : : - +437.5 
Per mile of stream----------------- a -O4 
157 
