TABLE F-29. --Waterfowl brood and late-nesting indexes, by species, southern Manitoba, July 1954-61 
[Index numbers, in thousands] 
Species 1956 | 1957 1958 | 1959 1960 1961 
Broods: ; 
Duck brood index--------~--------- 28 23 25 63 31 32 36 
Average brood size------~--------- 347 306 Jel 2 6.6 5.4 6.2 5.5 
Coot brood index------------------ 6 3 2 13 1 19 5 
Late-nesting index: —aear 
Dabblers:; 
Pintall---------------------+---- 
Mal Lard=<<ss-cesse.0-25---0--- — 2 1 
American widgeon---------------- 
Shove ler----+--+----------e2-nece= 
Gadwal]--+---s.---4-+--+2------- 
Blue-winged teal---------------+= 
Green-winged teal--------------+ - 
Subjictel-—---2. secant. 43 - 34 36 
RAO 



ie) 
HIP APR 
OrMrH ND ty 
8. 
B | Pond van 
Divers: 
2 ot Coo 
: 
gE g 
iB g 
p 
e 
hd kak i ae 
pi ten Te Pete Te To Te To 
TABLE F-30.--Percentage age-~class distribution of duck broods, by stratum, southern Manitoba, 1954-61 


Stratum A 








1954------~------- 61.5 33.5 5.0 62.9 20.0 17.1 26.4 11.4 
1955 ------- nnn nen e 41.9 30.2 27.9 17.4 43.5 39.1 36.7 33.4% 
1956 ee 31.2 41.6 272 17.6 50.0 32.4 42.8 27.8 
1957-------------- 29.2 43.2 27.6 28.1 36.1 15.8 44.4 26.5 
1958----+--------- 51.7 34.5 13.8 45.62 45.2 9.7 35.4 13.5 
1959-------------- 60.4 327 6.8 63.0 34.8 2.2 33.0 6.2 
1960---------+---~ 47.4 45.4 762 41.0 5401 4.9 47.5 6.7 
1961 eee ee, 35.6 50,0 14.4 28.8 59.1 12.1 56.3 12.8 



120 
