Monthly Catalog, United States Public Documents
Monthly Catalog, United States Public Documents

Author: United States. Superintendent of Documents

Publisher:

Published: 1973

Total Pages: 1252

ISBN-13:

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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.

Mourning Dove Status Report, 1970
Mourning Dove Status Report, 1970

Author: James L. Ruos

Publisher:

Published: 1971

Total Pages: 638

ISBN-13:

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U.S. mourning dove population indexes increased by 4% from 1969 to 1970 in the Eastern Management Unit, but declined 2% in the Central Management Unit and 11% in the Western Management Unit. The changes were below the 10-year means, 1960-69, by 3% in the Eastern Unit, 15% in the Central, and 27% in the Western. Regression analyses of the call-count data for 1960-70 indicate a statistically significant downward trend in dove breeding populations in all management units; mean rates of decline were 1% a year in the Eastern Unit, 3% a year in the Central, and 4% in the Western