Table 62.——Yariations in Adult kallard Mortality Rates in 1928-35, Based 
on Hunters! Reports of Males Banded on the Pacific Coast 
These birds were banded mostly by A. J. Butler in British Columbia and by G. M. Benson 
and his colleagues at the Malheur National Wildlife hsfuge in Oregon. The last colum 
on the right represents the annual mortality rate for first year indicated, based on a 
single cohort only (thus for birds banded in 1927, 162 + 252 equals 64 per cent for the 
year starting Sept. 1, 1928). Mortality rates at bottom of table are based on all banded 
cohorts available (thus 171 in the Total Shot column + 270 in the iotal Alive ccolum 
equals 63 per cent for the year starting Sept. 1, 1928). 

when Mortality and Survival Data Cle ssitied b pecitic Tears (JA/1-VIiI/ 31) 
Banded B 125 830 "31 132 1 36 5 TSS TO Th! LL 45 Total q,+1 
Nunbers Reported Shot 
126 _& & @ 2 & 2 18 
127 142 48 28 8 O 1 2 0 2 1 252 6 
128 231 6 12 1k kh 3 12 OO 1 345 67% 
29 69 1h 8 13 3 2 109 6h¢ 
130 ae” a re a ae Orr ae 67 
131 29 19 8 1 0 2 59 
132 98 h2 17 1 2 2 2 2 0021 167 59% 
133 109 35 17 10 7 2 3 #3 186 59% 
13h, 80 24 23 19 12 15 3 2 2 1 12 181 XQhg 
Sg tal F 
Shot 171 285 179 73 60 1)1 176 137 45 39 30 15 20 6 2 3 #1 11384 
Alive at Start of Hunting Season (September 1) 
126 ms Ff § 3 2 1 36 
127 252 90 2 1h 6 6 5 3 3 21 22 
128 3u5 Dh 32 20 9 5 2 1 1D 529 
929 109 hO 26 18 5 2 200 
130 67 29 18 13 4 3 2 2 138 
131 so 30 12 3 2 2 107 
132 167 69 27 10 9 7 5 3 1 1 21 300 
t 33 186 77 2 25 15 8 6 3 362 
13), 181101 77 Sk 35 2h 9 6 hk 2 2 
r) 
Alive 270 dy 268 156 1h2 2h9 29) 299 162 117 78 8 33 13 7 +S 2 1 2588 
Mortality Rates (per cent per annum, September 1 to August 31) 
63 64 67 4&7 2 57 60 hK6 = = = © = = &©= = = = 5365 

Ly5a 
