TABLE F-1.--Number and size of duck broods, Tetlin and Fort Yukon study areas, Alaska, 1960 and 1961 
Fort Yukon 

Species 1961 
Number of Average 
size 
Dabblers: © 
Pintail----.-.----- *. 
Mallaré-------.----- ae 
American widgeon~-- _ 
Shove lere------=-<- ig 
Blue-winged teal--- 8 
Green-winged teal-- big: 
Subtotal~-----~---- - 
Divers: 
Scaup---=--------=- din 
Canvasback--=+=+-+--- iy 
Redhead------.--.-- 5 
Ring-necked duck--- Ee 
Goldeneye~--------- - 
Bufflehead--------— ne 
Subtotal---------- my 
Miscellaneous: Scoter ais 
Total ducks------- z 
TABLE F-2.--Average size of duck broods by age class, Minto Lakes study area, Alaska, 1961 
ie anne HoH 
Species 
Number of broods Average size Number of broods Average size 
Dabblets: 
Pintall------02-------~-------<20n- 72 5.0 
Mallard------------0 222-2025 --2---- 10 5.3 
American widgeon------~---+-------<- 20 6.3 
Shoveler-------<------+40----------~ 42 6.6 
Green-winged teal------=----------- 29 6.3 
Subtotal--------------<.<8--------- 173 6.0 
Divers | 
SCQU Powe n mn ewe nse n nn sane sn ner nnsa= = 
Canvasback-----------<---e0en-c2n- -- 
Redhead-------s8~+-+-22n ene nnn nen=- -~ 
1 : 
Totel ducks-------=-----------===- Deo ie: & 173 6.0 
105 
