Table I, - Results of Spring Aerial Surveys, Alaska - Breeding Population Data - Ducks* 
SS eS eee eee Sucks 


Mean Density Pop. Stand. 
z No. of Pairs Per Ind. Range _—— Dev. Sampling 
tratum Area in 16 Mi. Dates of Sq. 16 Mi. Tot. Br. Prs. Per Prs. Per Error ** 
No. Location Sq. Mi. Tran. Surveys Mi. Tran. Pairs Tran. Tran, : 
la Misc. Low Density 189, 120 48 5/25 -6/14 0.9 3.73 170,208 O18 (18) 4,65 36 
Areas 
lb Lower Innoko 3,584 1 6/12 17 7.00 6,093 - : : 
lc Selawik 1,472 2 6/8 5.2 21.00 7,654 15-27 (12) 8.48 364 
ld Susitna 7,638 2 6/1 1.9 7.50 14,512 7-8 (1) 0.71 85 
i WE ro rr ed es, i ee 
Total 201, 814 53 5/25 -6/14 1.1 4-58 221,995 0-27 (27) 5.69 34 
2a Alaska Pen. 14,144 8 5/25 -5/27 4.2 17.00 59,405 4-44 (40) 11.99 59 
2b Upper Innoko 2,624 2 6/2 8.0 32.00 20,992 32-32 (0) - - 
2c Kobuk Delta 760 1 6/8 8.5 34.00 6,460 - - - 
2d Yukon Delta 24,960 15 6/13 3.2 12.80 79,872 3-34 (33) 10.73 46 
Total 42,488 26 5/25 -6/13 4.1 16.38 174,201 1-44 (43) 12.02 30 
3. Koyukuk 6,464 5 6/7 2,6 10.48 16,806 1-30 (29) 11.54 138 
4 Lake Louise 8, 384 10 6/4 4.0 16.10 33,536 1-28 (22) 7.20 32 
5a Minto Lakes 2,048 4 6/2 11.1#**44.50 22,733 16-90 (74) 31.86 114 
5b Ft. Yukon Flats 18, 368 34 6/3 - 6/5 10.0 40.00 183,680 2-81 (79) 20.62 18 
5c Tanana-Kuskokwim 30,720 53 5/26 - 6/8 3.6 14.40 110,592 0-134(134) 27.26 52 
Total 51,136 91 5/26 - 6/8 5.6 22.24 286,362 0-134 (134) 26.44 ~ 25 
6 Copper R. Delta 1,536 8 5/26 39.1 156.62 60,058 37-288 (251) 88.91 48 
All Strata Combined 311, 822 193 5/25-6/14 2.6 10.26 798,264 0-288 (288) 0.77 15 
(Weighted) (Weighted) 
