TABLE F-3, --Waterfowl species composition and nest density, 
Kashunuk river study area, Alaska, 1951 and 1961 
Number of nests found in-- 
“Specie 
‘ 1951 1961 
Ducks: Pee 
Pintail---------- be seh 2 5 
Old squaw---------------- 0 1 
Spectacled eider--------- 8 34, 
Steller's eider---------- 3 1 
Subtotal---~------------ ; 13 41 
Geese; 
Cackling goose--------+-+ 49 bd, 
Black brant--------~------ : ", 261 
Subtotal---------------- a? 
nee ge 2 TH 

TABLE F-4, --Black brant nest and brood data, by years, 
Kashunuk study area, Alaska 










Nests: 
Number located--------------- 135 
Average clutch size?-----~---- 3.6 | 
Hatching success------------- 85% 
Broods: 
Number counted--------------- 454 
Average brood size: 
Pitdt, week*-nsecasen---n~- 3.4 
Second week*®--------------- 2.8 
Third week?----~~----------- 2.8 
1 Based on clutches that had been incubated 10 to 15 days. 
@ Age-class I. : 
3 Age-class II. 
106 
mre 
TS 
