Mourning Dove Status Report 1970
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Author | : James L. Ruos |
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Total Pages | : 638 |
Release | : 1971 |
Genre | : Bird populations |
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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
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Total Pages | : 36 |
Release | : 1977 |
Genre | : Birds |
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Total Pages | : 124 |
Release | : 1975 |
Genre | : Wildlife conservation |
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Total Pages | : 174 |
Release | : 1987 |
Genre | : Wildlife conservation |
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A bibliography comprising annotated citations of 2037 scientific and technical publications from ten series issued by the U.S. Fish and Wildlife Service. Includes a six-page introduction containing a history of the Service and a description of the research and development series.
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Total Pages | : 238 |
Release | : 1987 |
Genre | : Fisheries |
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Total Pages | : 424 |
Release | : 1987 |
Genre | : Wildlife conservation |
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Total Pages | : 866 |
Release | : 1971 |
Genre | : Fishing |
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Total Pages | : 116 |
Release | : 1972 |
Genre | : Wildlife research |
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Author | : Eldon Ralph Clark |
Publisher | : |
Total Pages | : 542 |
Release | : 1971 |
Genre | : Bird populations |
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Information on the current status and population trends of the American woodcock is provided by annual singing-ground surveys over much of the species' breeding range and a wing-collection survey in the eastern United States. the 1970 singing-ground survey showed no change in the breeding population index for the Eastern region, a 3.12% increase for the Western region, and a 2.11% increase rangewide. This index is based on 752 comparable survey routes, all randomly selected, 35% more than the 568 routes used in 1969. The wing-collection survey for the 1969-70 season suggested a decline of 7.03% in productivity the previous summer, a slight decline in the average daily bag per hunter, and a sharper drop of 11.1% in the average seasonal bag. There is evidence that the woodcock harvest and the number of hunters participating increased over previous years, with the 1969-70 harvest exceeding 1.1 million birds. Woodcock research is increasing, with the present emphasis directed to banding on breeding grounds.
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Total Pages | : 998 |
Release | : 1949 |
Genre | : Fishes |
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