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Author: James L. Ruos
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 638
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Book Description
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
Author: James L. Ruos
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 638
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Book Description
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
Author:
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 36
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Book Description
Author: R. Kahler Martinson
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 490
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Book Description
Groups of data are organized by flyways, from Pacific to Atlantic, with appendixes of tables to correspond. Individuals or organizations that submitted a report have been credited. Although many of the narrative statements have been briefed, and a few tables deleted or shortened if they contained data submitted previously or in another form, the essential information from each report has been retained to the greatest extent possible.
Author:
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 694
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Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 998
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Author:
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 866
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Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category : Animals
Languages : en
Pages : 1020
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 644
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Author: Lytle Houston Blankenship
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 34
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Author:
Publisher:
ISBN:
Category : Wildlife conservation
Languages : en
Pages : 424
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Book Description
