Ss 
a 
Q 
° 
< 
i] 
a 
z 
= 
ty 
z 
J 
0 
x 
2 
4 
2 
Q 
g 
= 
0 
w 
2 
<. 
to 
° 
On 
TABLE 4e-=TRENDS IN MOURNING DOVE BREEDING DENSITY INDEXES BY PHYSIOGRAPHIC REGIONs 1965-71 
1/ 
2/ 
a/ 
af 
THE AVERAGE NUMBER OF DOVES HEARO PER ROUTE ADJUSTED ANNUALLY TO A BASE YEAR ACCCRDING TO THE 
PERCENT CHANGE FROM PRECEDING YEAR ON COMPARABLE ROUTES. THE BASE YEAR REPRESENTS THE MEAN 
NUMBERS OF DOVES HEARD PER ROUTE IN 1968, 19695 AND 19703 THE RESULTANT VALUE BEING ASSIGNED 
TO 19692 NeE~s = NO ESTIMATE AVAILABLE. 
WHEN A PHYSTOGRAPHIC REGION IS BISECTED BY A MANAGEMENT UNIT BOUNDARY» ITS MEAN BREEDING DENSITY 
INDEX IS ASSIGNED TO BOTH UNITS. 
THE MANAGEMENT UNIT BREEDING INDEXES ARE OBTAINED FROM TABLE A3- 
REGRESSION ANALYSIS: (1) 0-0 CALCULATED AS ©.O0COl. 
(2) ANNUAL PERCENT CHANGE GREATER THAN 999 EQUALS NO ESTIMATE (NeEo)~ 
STATISTICAL SIGNIFICANCE OF TREND NeS- = NOT SIGNIFICANT (P<.90)3 NeEw = NO ESTIMATE AVAILABLE. 
LINEAR REGRESSION ANALYSIS FROM MOST RECENT AVAILABLE DATAs RESULTS NOT COMPARABLE TO OTHER 
ANALYSES. 

