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Author : R. Kahler Martinson
Publisher :
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 : 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.
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Author :
Publisher :
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. 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.
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 :
Publisher :
ISBN 13 :
Total Pages : 888 pages
Book Rating : 4.F/5 ( download)
Download or read book Special Scientific Report--wildlife written by and published by . This book was released on 1949 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 1106 pages
Book Rating : 4.:/5 (89 download)
Download or read book Resource Publication (United States. Bureau of Sport Fisheries and Wildlife) written by and published by . This book was released on 1968 with total page 1106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William H. Goudy
Publisher :
ISBN 13 :
Total Pages : 1194 pages
Book Rating : 4.3/5 ( download)
Download or read book Woodcock Status Report, 1965 written by William H. Goudy and published by . This book was released on 1966 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Singing-ground surveys of the American woodcock indicate that breeding populations have increased gradually over the past 7 years while production, as indicated by wing-collection surveys, has remained relatively stable. The woodcock harvest, meanwhile, has probably more than doubled during the past decade. This suggests that while woodcock are probably becoming more important to North American sportsmen, hunting mortality is still relatively unimportant.
Author :
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ISBN 13 :
Total Pages : 644 pages
Book Rating : 4.3/5 ( download)
Download or read book Resource Publication written by and published by . This book was released on 1965 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 628 pages
Book Rating : 4.F/5 ( download)
Download or read book Population Ecology of the Mallard written by and published by . This book was released on 1972 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.3/5 (121 download)
Download or read book Bibliography of Published Research and Management Findings written by and published by . This book was released on 1974 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States Department of the Interior. U.S. Fish and Wildlife Service. Bureau of Sport Fisheries and Wildlife, author
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ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.3/5 (91 download)
Download or read book Population Ecology of the Mallard written by United States Department of the Interior. U.S. Fish and Wildlife Service. Bureau of Sport Fisheries and Wildlife, author and published by . This book was released on 1975 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.3/5 (121 download)
Download or read book Migratory Bird Populations and Habitat Relationships in Malheur-Harney Lakes Basin, Oregon written by and published by . This book was released on 1983 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Leigh M. Couling
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.:/5 (318 download)
Download or read book Reliability of Kill and Activity Estimates in the U.S. Waterfowl Hunter Survey written by Leigh M. Couling and published by . This book was released on 1982 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mail questionnaire survey of waterfowl hunters is conducted each year in the United States to provide information on waterfowl kill and hunter activity. We carried out a study using data from the 1971-73 and 1972-73 hunting seasons to determine the effectiveness of the present U.S. sampling and estimation techniques, and a number of modifications in both sampling and analysis is recommended.
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ISBN 13 :
Total Pages : 758 pages
Book Rating : 4.3/5 (555 download)
Download or read book Implementation of the Reclamation Reform Act of 1982 in the Central Valley Project written by and published by . This book was released on 1993 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : U.S. Fish and Wildlife Service
Publisher :
ISBN 13 :
Total Pages : 826 pages
Book Rating : 4.:/5 (319 download)
Download or read book Wildlife Abstracts written by U.S. Fish and Wildlife Service and published by . This book was released on 1976 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (318 download)
Download or read book Waterfowl Status Report, 1961 written by and published by . This book was released on 1961 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: And Fall Flight Forecast.
