
oo 
8 
Table 1, -- Hatching Success and Brood Survival 

Before 
Reaching 
Species Water Class l Class 11 Class 111 
No. DKLS/ No. DKLS/ No. DKLS/ No. DKLS/ 
Broods Brood Broods Brood Broods Brood Broods Brood Remarks 








Blacks 
Av. (45-50) 5# 10.0# 20.3 7.9 11.8 5.9 15.8 6.2 #1 year 
1950 - - 6 5.8 9 5.0 14 4,6 
B-w. teal 
Av. (45-50) - - 1.3 6,8 3.2 5.8 4.44 7.2# #5 years 
1950 - - 1 4.0 3 8.7 4 6,3 
G-w. teal 
Av. (45-50) - : 2.48 6.7# 2.5 6.2 5.0° 5.6° #5 years 
1950 - - - - 3 9.0 5 5.2 °%3 years 
Wood duck 
Av. (45-5 - - 7,.6# 6.34 10.0 5.9 8.7 5.8 #5 years 
1950 - - 5 7.4 12 6.1 12 5.3 
Ringneck 
Av. (45-50) - - 23.2 6.7 17.0 6,6 8.4 5.6 
1950 - - 16 8.0 20 7.2 7 6.3 
Golden-eye 
Av. (45-50) - - 25.24% 6.2# 9.5 4.6 8.2 4.9 #5 years 
1950 - - 14 7,8 4 7.5 4 2.3 
Class 1 ... Up to 1/4 grown, i.e. in the down 
Class ll... 1/4 - 3/4 grown 
Class 111 ... 3/4 grown to a-wing 
Species Composition of the Breeding Population 
The species composition of the breeding population is shown in Table 2. 
Table 2, -- Species Composition 
Species Total Population Percent 
Blacks 1302 54,7 
Wood duck 347 . 14.5 
Ringneck 299 -12.5 
B-w, teal | 214 9.1 
G-w. teal 159 6.4 
Golden-eye 51 2.1 
Mallard 8 0.3 
Unidentified 7 0,3 
Scaup 2 0.1 
— 
i] 
oS 
oS 
Total 2389 
This table shows that black ducks have increased about nine percent in 
importance on the area over last year. This is the second time in the past six years 
that the black ducks have increased their relative importance, Ringnecks, golden-eye, 
and green-winged teal have also increased in importance, but wood ducks, blue-winged 
teal, and mallards have decreased slightly from last year. 
