130 
Table I. - Hatching Success and Brood Survival -:1953 5° 2 os, 
Species Class I Class II Class III Remarks 
No, ‘Dkls. / ‘No. Dklis. / No. Dkls. ] 
Broods Brood Broods’ Brood Broods Brood 
Black Ducks . 


“Av. 45-53 16.1 cast EL. 1 6.2 14.8 6.9 
1952 8 8.0 12 tet 17 7.6 
1953 8 TS 9 6.1 7 7.0 
B-w. Teal é' aK 
“Av. 45-53 2.8 6.5 3.6 6.2 4.5% 6.9% 8 yrs. only 
1952 4 6.0 3 7.7 5 8.2 
1953 LZ 9.2 9 6.3 4 5.5 
G-w. Teal 
Av. 45-53 2.3% 7.4% 2.64+ 6.64 4,2° 5.9 * 7 yrs. only 
1952 - “ 3 8.7 4 5.8 +8 "! Me 
1953 Ss = _ 7 = by og '" tt 
Wood Duck 
“Av. 45-53 7.4% 6.4% 9.1 6.0 7.5 5.6 *8 yrs. only 
1952 3 8.7 12 6.5 6 5.8 
1953 12 8.2 3 7.0 3 5.7 
Ringneck 
Av. 45-53 19.2 7,0 14.7 6.4 6.4% 5.5* *8 yrs. only 
1952 ll 8.2 16 6.4 1 4.0 
1953 18 7.9 8 5.4 1 5.0 
Goldeneye 
Av. 45-53 21.6% 6.2% 9.3 4.9 8.3 4.6 *8 yrs. only ° 
1952 18 6.7 15 5.8 12 4.2 
1953 14 7.0 5 5.4 4 5.8 

Population Changes from 1952 
Table II shows the changes in total waterfowl population on the study area since 
1952. There is an over~all decrease of 40 percent from last year at the end of the 
survey on August 17. This is considered to be mainly due to the low water levels 
which has dried up most of the sloughs. 
Table II. - Population Changes from 1952 
Total Population Percent Increase or 
Species 1952 1953 Decrease from 1952 
ANE A a NS eT OTE eee er, Pe a A eR ae ES AE ae 
Black Ducks 1,405 738 - 48 
B-w. Teal 160 363 +127 
Wood Duck 333 122 - 63 
Goldeneye 127 19 - 38 
Ringneck 210 65 - 69 
G-w. Teal — 78 —= 20 - 74 
Mallard 3 2 -- 
Pintail - 2 -- 
cg er Ss aS SS i SS a 
Total 2,316 1,391 - 40 
