Download or read book Waterfowl Population Estimates written by P. M. Rose and published by . This book was released on 1997 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl population estimates draft written by and published by . This book was released on 1993 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Population Status written by and published by . This book was released on with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wisconsin Breeding Duck Populations written by and published by . This book was released on 1992 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Breeding Population Survey for Wisconsin written by and published by . This book was released on 2003 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl populations and breeding conditions written by and published by . This book was released on 1949 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Status of Waterfowl and Fall Flight Forecasts written by and published by . This book was released on 1991 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Population Status 2005 written by U. S. Fish U.S. Fish and Wildlife Service and published by CreateSpace. This book was released on 2015-02-14 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This section summarizes the most recent information about the status of North American duck populations and their habitats in order to facilitate development of harvest regulations in the U.S. The U.S. Fish and Wildlife Service and its partners conduct a variety of surveys to collect information on ducks. The annual status of these populations is assessed using databases resulting from these surveys, which include estimates of the size of breeding populations, production, and harvest. This report details abundance estimates and production outlooks; harvest survey results are discussed in separate reports. The data and analyses were the most current available when this report was written. Future analyses may yield slightly different results as databases are updated and new analytical procedures become available.

Download or read book Waterbird Population Estimates written by Simon Delany and published by . This book was released on 2006 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Population Status 2006 written by U. S. Department of the Interior U.S. Fish and Wildlife Service and published by CreateSpace. This book was released on 2006-07-25 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the most recent information about the status of North American duck populations and their habitats in order to facilitate development of harvest regulations in the U.S. The U.S. Fish and Wildlife Service and its partners conduct a variety of surveys to collect information on ducks. The annual status of these populations is assessd using databases resulting from these surveys, which include estimates of the size of breeding populations, production, and harvest. This report details abundance estimates and production outlooks; harvest survey results are discussed in separate reports.

Download or read book Population Estimates of Waterfowl in Northern Wisconsin 1987 1991 written by David F. Caithamer and published by . This book was released on 2002 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Population Status written by and published by . This book was released on 2001 with total page 56 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 1980 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Breeding Population Survey Minnesota 2013 written by and published by . This book was released on 2013 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Status Report of Waterfowl written by U.S. Fish and Wildlife Service and published by . This book was released on 1972 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Waterfowl Population Status 1996 written by and published by . This book was released on 1996 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Critical Review of Michigan s Spring Waterfowl Survey written by Nathaniel Thomas Yost and published by . This book was released on 2020 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: To monitor the status of waterfowl populations, the Michigan Department of Natural Resources (MDNR) began surveying abundance of breeding ducks and geese in 1991 and developed goals for waterfowl population and habitat management tied to the spring waterfowl survey. The spring waterfowl survey required flying a series of fixed-width transects using fixed-wing aircraft to estimate statewide abundance of Canada geese (Branta canadensis), mallards (Anas platyrhynchos), mute swans (Cygnus olor), and sandhill cranes (Grus canadensis) among others. To get consistent results, standard operating procedures (SOP) have been implemented and maintained across the years. Since observers did not see all birds from the fixed-wing aircraft, estimation of waterfowl abundance required surveying a portion of transects with helicopters to establish visibility correction factors (VCF). MDNR used the VCF to adjust fixed-wing estimates assuming observers saw all birds in transects flown with helicopters. To potentially improve precision and reduce costs, we developed alternate VCFs and aerial survey designs to understand how the accuracy and precision of the waterfowl population estimate changed from the existing SOP methodology. To meet MDNR standards, we considered alternate population estimates that produced a coefficient of variation (CV) of less than 20% to be acceptable and worth consideration. We found comparable population estimates and CVs from eleven alternate VCFs and three alternate aerial survey designs compared to the SOP.