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Visibility Bias In Waterfowl Brood Surveys And Population Ecology Of Dabbling Ducks In Central Washington Anas
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Book Synopsis Visibility Bias in Waterfowl Brood Surveys and Population Ecology of Dabbling Ducks in Central Washington (anas) by : John H. Giudice
Download or read book Visibility Bias in Waterfowl Brood Surveys and Population Ecology of Dabbling Ducks in Central Washington (anas) written by John H. Giudice and published by . This book was released on 2001 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: I investigated the feasibility of using sightability models to estimate and correct visibility bias in waterfowl brood surveys. Visibility bias is an important source of error in brood surveys, but most surveys do not account for imperfect detection or sightability covariates. I used 93 radio-marked mallard (Anas platyrhynchos) broods and a point-count method to develop predictive sightability models and assess the relative importance of sightability covariates. Mean brood visibility was 24%, but detection rates ranged from 13 to 51% depending on year and scale of application. Brood visibility was negatively correlated with percent visual obstruction and brood age. Observer experience, ambient temperature, and wind speed also influenced detection probabilty, but effects were less important than percent visual obstruction or brood age. Brood visibility was not strongly correlated with wetland-basin characteristics (e.g., size, shape, and percent surveyed). Brood and survey-area charact.
Book Synopsis Evaluations of Duck Habitat and Estimation of Duck Population Sizes with a Remote-sensing-based System by : Lewis M. Cowardin
Download or read book Evaluations of Duck Habitat and Estimation of Duck Population Sizes with a Remote-sensing-based System written by Lewis M. Cowardin and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2001 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Waterfowl Brood Survey Manual by : Merrill C. Hammond
Download or read book Waterfowl Brood Survey Manual written by Merrill C. Hammond and published by . This book was released on 1970 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Waterfowl Management Handbook by : James Kent Ringelman
Download or read book Waterfowl Management Handbook written by James Kent Ringelman and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Habitat Use and Response to Wetland Management Practices of Non-breeding Dabbling Ducks in Western Tennessee by : Matthew Doddridge McClanahan
Download or read book Habitat Use and Response to Wetland Management Practices of Non-breeding Dabbling Ducks in Western Tennessee written by Matthew Doddridge McClanahan and published by . This book was released on 2015 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Western Tennessee is an important area for non-breeding waterfowl in the Mississippi Flyway, including over 40% of the Mississippi Flyway population of American black ducks (Anas rubripes, hereafter black ducks), a species in decline. Information is lacking on waterfowl community ecology in the region, and managers must identify key habitats and consider functional use and potential predictors of resource use by non-breeding communities. Impacts of wetland management practices, such as moist-soil disking and subsequent planting of desirable grasses (i.e., Japanese millet [Echinochloa frumentacea], hereafter millet), must also be tested relative to impacts on waterfowl use and habitat quality. During winters 2011-2013 (November-February), I estimated food densities, diurnal habitat use, activities, and potential predictors of use of dabbling ducks (Anatini) at the Duck River Unit of Tennessee National Wildlife Refuge and Cross Creeks National Wildlife Refuge in western Tennessee, and I interpreted patterns relative to black ducks observed in concurrent studies (Chapter II). I also estimated autumn vegetation response, dabbling duck use and activities, and food densities in moist-soil wetland plots disked and planted with millet (Chapter III). Dabbling ducks primarily used moist-soil areas, and foraging was the dominant activity. Mudflats and scrub-shrub areas were also used as foraging areas. Habitat use was positively correlated with increasing emergent cover and energetic carrying capacity and was negatively correlated with increasing water depth. Black ducks occurred with other Anatini species in each habitat type, especially in moist-soil and scrub-shrub areas. Food densities were initially greatest in moist-soil areas, but foods declined rapidly. Vegetation was taller and percent cover of desirable species greater in un-manipulated than disked wetland plots, but duck use and food densities did not differ between treatments. Foraging was more frequently observed in disked than un-manipulated plots. Disking and millet planting did not improve wetland use by black ducks. My results suggest that managers should provide a complex of natural wetland types to accommodate non-breeding dabbling duck communities in western Tennessee. Disking and millet planting should not be used to improve moist-soil wetlands for black ducks, and other wetland manipulation techniques should be investigated.
Book Synopsis Fireside Waterfowler by : David E. Wesley
Download or read book Fireside Waterfowler written by David E. Wesley and published by Harrisburg, Pa. : Stackpole Books. This book was released on 1987 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Habitat Management on Dabbling Ducks During Spring Migration in Southwestern Indiana by : John Michael Lindstrom
Download or read book Effect of Habitat Management on Dabbling Ducks During Spring Migration in Southwestern Indiana written by John Michael Lindstrom and published by . This book was released on 2017 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, management for migratory waterfowl was focused around providing hunting opportunity each fall. More recently habitat during spring migration has received attention as a potentially limiting factor for some species of waterfowl, considering the carry-over effects that have been observed in both capital and income breeders. Habitat needs have been compounded by the flashy flood events that now occur in the highly modified landscape. The discovery of carry-over effects has led to an increase in habitat management actions and a diversification of available management strategies. In my study I hoped to identify the best management strategies for spring migratory waterfowl. I also wanted to identify how quickly waterfowl can respond to flood events. In 2012 and 2013, I examined the effect of habitat management on dabbling duck behavior and distribution during spring migration in southwest Indiana. I investigated three management options for wetlands: active management, passive management, and agricultural food plots. Actively managed wetlands are wetlands where the hydrology is managed and controlled. In passively managed wetlands and agricultural food plots; the hydrology is provided naturally. I surveyed both duck behavior and abundance on 14 wetlands on the Patoka River National Wildlife Refuge and Management Area. I also surveyed short-lived wetlands to determine the response rate of waterfowl to inundation following rain events. The agricultural food plot areas had the lowest estimates of food availability followed by the actively managed areas with the passive managed wetlands having the highest estimate. Waterfowl abundances were highest on the actively managed wetlands with the food plots coming in second and the passive wetlands coming in a distant third. The passive wetlands had the highest proportions of time spent feeding followed by the active and food plot wetlands. Dabbling ducks were not distributing themselves relative to food density but are feeding in the highest proportions in these areas. Waterfowl use was recorded less than 24 hours after inundation on 14 of 21 short-lived wetlands. Short-lived wetlands may be important to migratory waterfowl. Conservation prioritization of passively managed areas would provide larger areas for dabbling ducks to feed, but active management provides habitat regardless of climatic variability. Moving forward, wetland complexes encompassing diverse wetland management approaches would be the best option for spring migrating waterfowl as these complexes can provide high quality habitats and buffer against uncontrollable climactic conditions.
Book Synopsis Habitat Management for Migrating and Wintering Waterfowl in North America by : Loren M. Smith
Download or read book Habitat Management for Migrating and Wintering Waterfowl in North America written by Loren M. Smith and published by Texas Tech University Press. This book was released on 1989 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important compilation on habitat management for waterfowl throughout North America addresses practicing waterfowl biologists and managers, researchers, and students of waterfowl ecology and management.
Book Synopsis Field Manual of Wildlife Diseases by :
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:
Book Synopsis Bioindicators for Assessing Ecological Integrity of Prairie Wetlands by : Paul R. Adamus
Download or read book Bioindicators for Assessing Ecological Integrity of Prairie Wetlands written by Paul R. Adamus and published by . This book was released on 1996 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Ducks, Geese and Swans of North America by : Francis H. Kortright
Download or read book The Ducks, Geese and Swans of North America written by Francis H. Kortright and published by . This book was released on 1942 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Critical Review of the Aerial and Ground Surveys of Breeding Waterfowl in North America by : Graham W. Smith
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:
Book Synopsis The Ecology and Management of Breeding Waterfowl by :
Download or read book The Ecology and Management of Breeding Waterfowl written by and published by U of Minnesota Press. This book was released on 1992 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Diseases of Wild Waterfowl by : Gary A. Wobeser
Download or read book Diseases of Wild Waterfowl written by Gary A. Wobeser and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Management of wild waterfowl has become increasingly intensive. Many birds now hatch in managed nesting cover or in artificial nesting structures, use man-made wetlands, and winter on crowded refuges while consuming a grain diet The water they use is often limited in supply and may contain residues from its many prior users. Unfortunately, intensified management often results in new problems, among which disease is important There are many similarities between the current form of management used for some waterfowl and that used in domestic animals. In both, the objective is to maintain a healthy, productive population. Dealing with health problems in waterfowl will benefit from combining the skills of veterinary medicine and wildlife ecology. Revisiting this book after 15 years allowed me to consider changes at the interface between the two disciplines. Veterinary medicine traditionally has been concerned with the individual and with treating sick animals, while the ecologist is concerned with populations and the manager has limited interest in treating sick birds. During this period there has been a marked increase in awareness among veterinarians that they have a responsibility in wildlife and conservation biology. Curricula of many veterinary colleges now include material on non-domestic animals and attempt to put disease in an ecological context. Also during this time, waterfowl managers have become more aware of disease as a factor in population biology and there are early attempts to put numbers to "disease" in models of continental waterfowl populations.
Book Synopsis Current Ornithology Volume 17 by : Charles F. Thompson
Download or read book Current Ornithology Volume 17 written by Charles F. Thompson and published by Springer Science & Business Media. This book was released on 2010-09-09 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Ornithology publishes authoritative, up-to-date, scholarly reviews of topics selected from the full range of current research in avian biology. Topics cover the spectrum from the molecular level of organization to population biology and community ecology. The series seeks especially to review (1) fields in which an abundant recent literature will benefit from synthesis and organization, or (2) newly emerging fields that are gaining recognition as the result of recent discoveries or shifts in perspective, or (3) fields in which students of vertebrates may benefit from comparisons of birds with other classes. All chapters are invited, and authors are chosen for their leadership in the subjects under review.
Book Synopsis Waterfowl Management Handbook by : Angela V. Graziano
Download or read book Waterfowl Management Handbook written by Angela V. Graziano and published by . This book was released on 1993 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
