|
Description: |
[3], 27, [2], 27 pages : illustrations, tables ; 27 cm. |
|
|
General Note: |
Report for 1975 compiled by James L. Ruos and David D. Dolton. Report for 1976 compiled by David D. Dolton. |
|
|
Bibliography Note: |
Includes bibliographical references. |
|
|
Summary, Etc. Note: |
Abstract: Mourning dove population indices, as determined from the nationwide Call-Count Survey, increased from 1974 to 1975 by 10% in the Eastern Management Unit, remained unchanged in the Central Management Unit, and decreased by 3% in the Western Management Unit. The 1975 indices were below the 10-year means (1965-1974) by 4% in the Eastern and Central Units, but the index was 18% above the long-term mean in the Western Unit. Regression analyses of the call-count data for 1965-1975 indicate a downward trend in dove breeding populations in all management units; mean rates of annual decline were 2% in the Eastern and Central Units, and less than 1% in the Western Unit. |
|
|
|
Contents: Acknowledgements. |