. PACIFIC FLYWAY 
Breeding Ground Surveys 
A LASKA 
weather and Water Conditions - 
All of Alaska was considered to have a "retarded'! spring although 
the break-up came at an average date. Water conditions were extremely high 
in the Minto Lakes area and on the lower Iditarod River, although no adverse 
effect on production should have been caused by these early floods. Elsewhere, 
water levels seemed to be adequate to normal. 
®reeding Population and Production Trend - 
i ma a ee 
Because of the change in stratification in some areas, a quantitative 
gomparison of the breeding population trend between 1954 and 1955 is not 
possible there. On the Fort Yukon Flats, however, there seems to be about a 
50 percent reduction of the breeding population from a density of 10.0 pair per 
gquare mile in 1954 to 5.5 pair per square mile in 1955, In the Minto Lake 
area there is little or no change. The Copper River Delta shows some reduction 
in duck brood stock, but no comparative figures are available for Canada geese. 
The Lake Louise area indicates little or no change from last year. The Innoko- 
Iditarod River system, Yukon-Kuskokwim Delta, and Koyukuk area show an 
increase, although no statistically valid comparison is possible. 
Gable 1 - Breeding Density and Population Index - Game Ducks - 
? May 31 to June 10, 1955 
No. of Mean Density Population 
Area, 16-Mi. Square Pairs Per Index, Total 
cation Stratum Sq.Mi. Tran. Mi.Sample Square Mile Breeding Pairs 



Bikon Delta 2 9, 380 7 14 8.3 77, 895 
3 16, 300 28 56 2.6 42, 380 
Innoko - 2 1,050 2 4 10.0 10, 000 
Iditarod 3 1,500 12 24 4,3 6,450 
4 520 4 8 8 416 
flaska 3 _ 6,200 7 28 3.2 19, 840 
Peninsula , 
Selawik 3 2, 700 3 6 4.0 10, 800 
Buckland =, 200 i 2 13.5 2,700 
River 
Norton Bay 2 400 2 4 8.0 3, 200 

11 Continued 
