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Author :
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ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (18 download)
Download or read book Factors Influencing Waterfowl Counts on Aerial Surveys, 1961-66 [with List of References] written by and published by . This book was released on 1967 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. Kahler Martinson
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.3/5 (91 download)
Download or read book Factors Influencing Waterfowl Counts on Aerial Surveys, 1961-66 written by R. Kahler Martinson and published by . This book was released on 1967 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surveying of selected transects from the air and from the ground has been used since 1959 to determine the proportion of waterfowl, by species, that are observed by aerial crews. This method attempts to resolve obvious biases in aerial indexes relating to habitat differences, seasonal differences, aerial crew changes, etc. Assumptions in this method of correction are that (1) the ground crew observed substantially all waterfowl present and (2) the selected comparison transects adequately represent surrounding transects to which the correction is to be applied. This report, utilizing data of 1961 to 1966, reviews the necessity for air:ground correction and evaluates the procedure as a solution to aerial index biases ; problems apparent are lack of representativeness of air:ground transects and inadequate numbers of transects. Lack of representativeness appears in population density and in species composition differences between air:ground and operational transects. The degree to which the numbers of air:ground ratios varies according to areas and according to species. Recommendations to improve the air:ground technique are: (1) make two daily surveys of one aerial pass each, at an interval of at least two hours, in the same direction and at the same time as the adjacent operational transects are surveyed ; (2) make ground counts the day before or day after aerial surveys ; (3) lay out all air:ground comparison transects in the same direction (west-east) as the operational transects ; and (4) match new or relocated transects as nearly as possible to density and species composition of the survey stratum or area they represent.
Author : R. K. Martinson
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (246 download)
Download or read book Factors influencing waterfowl counts on aerial surveys written by R. K. Martinson and published by . This book was released on 1967 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surveying of selected transects from the air and from the ground has been used since 1959 to determine the proportion of waterfowl, by species, that are observed by aerial crews. This method attempts to resolve obvious biases in aerial indexes relating to habitat differences, seasonal differences, aerial crew changes, etc. Assumptions in this method of correction are that (1) the ground crew observed substantially all waterfowl present and (2) the selected comparison transects adequately represent surrounding transects to which the correction is to be applied. This report, utilizing data of 1961 to 1966, reviews the necessity for air:ground correction and evaluates the procedure as a solution to aerial index biases ; problems apparent are lack of representativeness of air:ground transects and inadequate numbers of transects. Lack of representativeness appears in population density and in species composition differences between air:ground and operational transects. The degree to which the numbers of air:ground ratios varies according to areas and according to species. Recommendations to improve the air:ground technique are: (1) make two daily surveys of one aerial pass each, at an interval of at least two hours, in the same direction and at the same time as the adjacent operational transects are surveyed ; (2) make ground counts the day before or day after aerial surveys ; (3) lay out all air:ground comparison transects in the same direction (west-east) as the operational transects ; and (4) match new or relocated transects as nearly as possible to density and species composition of the survey stratum or area they represent.
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1967 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (319 download)
Download or read book Selected Research Publication Series of the U.S. Fish and Wildlife Service, 1889-1985 written by and published by . This book was released on 1987 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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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ISBN 13 :
Total Pages : 238 pages
Book Rating : 4.3/5 (91 download)
Download or read book Resource Publication written by and published by . This book was released on 1987 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 424 pages
Book Rating : 4.:/5 (318 download)
Download or read book Research and Development Series written by and published by . This book was released on 1987 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 746 pages
Book Rating : 4.:/5 (31 download)
Download or read book Technical Bulletin written by and published by . This book was released on 1967 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wisconsin. Department of Natural Resources
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ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.E/5 ( download)
Download or read book Technical Bulletin - Department of Natural Resources written by Wisconsin. Department of Natural Resources and published by . This book was released on 1983 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. Kahler Martinson
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ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (633 download)
Download or read book Factors Influencing Waterfowl Counts written by R. Kahler Martinson and published by . This book was released on 1967 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Superintendent of Documents
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ISBN 13 :
Total Pages : 1504 pages
Book Rating : 4.F/5 ( download)
Download or read book Monthly Catalog of United States Government Publications, Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1979 with total page 1504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Total Pages : 176 pages
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Download or read book Resource Publication - United States, Fish and Wildlife Service written by and published by . This book was released on 1975 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark R. Fuller
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ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (3 download)
Download or read book Raptor survey techniques written by Mark R. Fuller and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1032 pages
Book Rating : 4.3/5 (91 download)
Download or read book National Union Catalog written by and published by . This book was released on 1980 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.
Author : Environmental Science Information Center
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ISBN 13 :
Total Pages : 500 pages
Book Rating : 4.0/5 ( download)
Download or read book Bibliography of the New York Bight: List of citations written by Environmental Science Information Center and published by . This book was released on 1974 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Graham W. Smith
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ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.3/5 ( download)
Download or read book A Critical Review of the Aerial and Ground Surveys of Breeding Waterfowl in North America written by Graham W. Smith and published by . This book was released on 1995 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher : Geological Survey (USGS)
ISBN 13 :
Total Pages : 444 pages
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Download or read book Field Manual of Wildlife Diseases written by and published by Geological Survey (USGS). This book was released on 1999 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
