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.

Download or read book Waterfowl Status Report 1961 written by Robert E. Stewart and published by . This book was released on 1961 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Status Report 1961 with List of Literature Cited written by and published by . This book was released on 1961 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Status Report 1963 written by and published by . This book was released on 1963 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Distribution in States and Counties of Waterfowl Species Harvested During 1961 70 Hunting Seasons written by Samuel M. Carney and published by . This book was released on 1975 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Average numbers of waterfowl harvested during the 1961-70 hunting seasons are estimated by species for each county in the continental United States. A brief account of the estimating procedure is included.

Download or read book Resource Publication written by and published by . This book was released on 1965 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Status Report written by and published by . This book was released on 1961 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wildlife Research Report written by and published by . This book was released on 1972 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Status Report 1975 Waterfowl Status Report 1976 written by James R. Goldsberry and published by . This book was released on 1980 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains information obtained from the 1974-75 midwinter waterfowl survey, the 1975 waterfowl breeding population and production surveys, and the waterfowl harvest surveys for the 1974-75 hunting season.

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 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resource Publication United States Bureau of Sport Fisheries and Wildlife written by and published by . This book was released on 1971 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Pacific Waterfowl Flyway Report written by and published by . This book was released on 1962 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Ecology of Migratory Birds written by and published by . This book was released on 1972 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1963 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Ecology of the Mallard written by David Raymond Anderson and published by . This book was released on 1972 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simple experiments and observations reveal the physical properties of light.