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Description: |
iv, 23 pages : illustrations, tables ; 26 cm |
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Research supported by the U.S. Fish and Wildlife Service. |
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Bibliography Note: |
Includes bibliographical references (page 17). |
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Summary, Etc. Note: |
Abstract: Nationwide dove population indexes presented in the 1967 Mourning Dove Status Report were obtained by essentially the same data gathering and analyzing procedures as in 1966. A refinement was made in the base year index, using the mean of the 1966 and 1967 readings as the base for all States. There was a slight adjustment in physiologic region boundaries. Data analyses suggest that the 1967 dove populations declined to approximately the 1965 level in all units. Present population indexes in all units are below the 10-year (1957-1966) mean. Long-term trends in population densities indicate that dove breeding populations in all units are considerably below the peak of 1960 and, with the exception of the Eastern Management Unite, are at their lowest level since 1957. |