Optimizing the Duration of Point Counts for Monitoring Trends in Bird Populations PDF Download
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Author: Jared Verner
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 4
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Book Description
Minute-by-minute analysis of point counts of birds in mixed-conifer forests in the Sierra National Forest, central California, showed that cumulative counts of species and individuals increased in a curvilinear fashion but did not reach asymptotes after 10 minutes of counting. Comparison of the expected number of individuals counted per hour with various combinations of counting time and noncounting times for record keeping and travel between counting stations showed that 10-minute counts were most efficient in most cases. Counting longer than 10 minutes is not recommended, because other increased risk of double counting some individuals.
Author: Jared Verner
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 4
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Book Description
Minute-by-minute analysis of point counts of birds in mixed-conifer forests in the Sierra National Forest, central California, showed that cumulative counts of species and individuals increased in a curvilinear fashion but did not reach asymptotes after 10 minutes of counting. Comparison of the expected number of individuals counted per hour with various combinations of counting time and noncounting times for record keeping and travel between counting stations showed that 10-minute counts were most efficient in most cases. Counting longer than 10 minutes is not recommended, because other increased risk of double counting some individuals.
Author: C. John Ralph
Publisher: DIANE Publishing
ISBN: 9780788143441
Category :
Languages : en
Pages : 192
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Book Description
Point counts of birds are the most widely used quantitative method and involve an observer recording birds from a single point for a standardized time period. In response to the need for standardization of methods to monitor bird populations by census, researchers met to present data from various investigations working under a wide variety of conditions, and to examine various aspects of point count methodology. Statistical aspects of sampling and analysis were discussed and applied to the objectives of point counts. The final chapter presents these standards and their applications to point count methodology.
Author:
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 440
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Book Description
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 114
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Author:
Publisher:
ISBN:
Category : Bird populations
Languages : en
Pages : 0
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 192
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Book Description
Author: J. Michael Wuerth
Publisher:
ISBN:
Category : Design
Languages : en
Pages : 216
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 282
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Book Description
Author: Todd R. Mills
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 12
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Book Description
Author: John R. Sauer
Publisher: Wildlife Research Group
ISBN: 9780899046525
Category :
Languages : en
Pages : 192
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Book Description
