PACIFIC FLYWAY 
Production Indices - 

Table III presents the production indices which were obtained 
during the July survey. 
Table III. Aerial Production Date 1953 - 1954 
Strata A =: Strata B : Strata Cc : Province 
: 1953: 4 o:1 h: 2:195h : : 






Area in : : (ik : oe rs eee : ; 
Sq. Mi.. : 22088 ; 22088 :26100 :26100 :16112 :16112 :64300 :64300 
Sample in : : : : : 
24.85 :263.25  :177575:184.5 :78.85 :85.5 501275; 
Tot. Braods : : : : 2 us ae : "4 
Seen : : : : : 

1.35: 0.81 ; O.41 ; 0.93 : 1.61 :.0.48 : 1.2h 
eG peas se ee e¢f4e € 


Pot. Later : . : : : 2 
Birds : : 
Tot, Ind. : : p St SE Ss : 
: 1095 _ ; 1563 : 588; T77 226 i 137: :_ 1909 : 2h 
Brds. sq. : : : ¢ : | 
mi, ind. 2hU7 : 5.93 : 3. 30 4, a1: 2 57: 1.60 ; : 3. 8B: 4 eh5 
Est. No. See : 
Brds. Ind, :98733 ;13098e2 86130 ee eoho 25779 23oTt2: 266oK2 
Aver. Brd. ; : 
Size | 5.59 De 7: 5.78 : : 5, 64 
Est. No. : 
Ducklings 540070 52188 “491812 ; o3ign2 221957 .393h0 1252291503061 
Percent : : 
Change f 26; : f 23: $.- 39: :¢ 17 
: 4.80, 

547: 


“Potential later broods. This figure is derived by tallying the pairs, 
lone mailes and lone femeles present on the transect in July. For pur- 
pose of comparison with 1953 figures we assume that each pair, male or 
female represents a potential brood and that 1 will hatch. As this is 
impossible, we know that this is an inflated figure. In a year such as 
this, however, we may estimate that between 60% and 75% would be 
successful. 
° 19 
