Download or read book Nesting Ecology of Ducks in Dense Nesting Cover and Restored Native Plantings in Northeastern North Dakota written by Ryan D. Haffele and published by . This book was released on 2012 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conservation efforts to increase duck production have led the United States Fish and Wildlife Service to restore grasslands with multi-species (3-5) mixtures of cool season vegetation often termed dense nesting cover (DNC). The effectiveness of DNC to increase duck production has been variable, and maintenance of the cover type is expensive. In an effort to decrease the costs of maintaining DNC and support a more diverse community of wildlife, restoration of multi-species (16-32) plantings of native plants has been explored. Understanding the mechanisms of nest site selection for nesting ducks within these plantings is important in estimating the efficiency of this cover at providing duck nesting habitat and determining appropriate management techniques. I investigated the vegetation characteristics between the 2 aforementioned cover types in the prairie pothole region of North Dakota, USA to see if native plantings provide the same vegetative structure to nesting hens as DNC. I also determined the nest density and nest success of upland nesting waterfowl in the cover types to determine if restored native plantings are providing the same nesting opportunity as DNC. Within each cover type I identified vegetation characteristics at nest sites of the 5 most common nesting species and compared them to random locations and within species to identify species specific factors in nest site selection. I located 3,524 nests (1,313 in restored-native vegetation and 2,211 in DNC) of 8 species in 2010-11. Native plantings had an average of 6.17 (SE = 1.61) nests/ha while DNC had an average of 6.71 (0.96) nests/ha. Nest densities were not different between cover types for the 5 most common nesting species. In 2010, nest success differed between cover types with restored-native plantings having 48.36% (SE = 2.4) and DNC having 42.43% (2.1) success. In 2011, restored-native planting success dropped considerably to 13.92% (1.7) while DNC success was similar to 2010 at 37.10% (1.7) The variability in nest success appeared to be impacted by late season success, as native plantings had similar success early in the nesting season, but much lower success later in the nesting season in both years. Vegetation data indicated no structural difference between cover types in 2010; however, a difference was detected during the late sampling period in 2011, with native plantings having shorter vegetation at random locations than DNC during this sampling period. In general ducks selected nest sites with greater leaf litter and denser, taller cover compared to random sites, however, vegetation density and height selection varied among species. Gadwall and mallards selected the tallest, densest vegetation, with northern pintail, blue-winged teal, and northern shovelers selecting vegetation of intermediate height and density. My results indicate native plantings are able to support similar densities of nests, but have great variability in nest success from year to year. In years with low nest success, native plantings may create an ecological sink as hens were not able to identify low quality patches and nested in similar densities despite lower success.

Download or read book Dense Nesting Cover Versus Native Grassland in Relation to Duck Nesting Success and Density written by Edward F. Rodriguez and published by . This book was released on 1984 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Landscape Characteristics on Duck Nesting Success in the Missouri Coteau Region of North Dakota written by Scott Eugene Stephens and published by . This book was released on 2003 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Program of Waterfowl Restoration written by J. Clark Salyer and published by . This book was released on 1934 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Predator Reduction on Nest Success of Upland Nesting Ducks in Low grassland Density Landscapes in Eastern North Dakota written by Michael Buxton and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Special Reference Briefs written by and published by . This book was released on 1983 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Habitat Use and Nesting Success of Dabbling Ducks in Western New York Grasslands written by Bridgett L. Estel and published by . This book was released on 1989 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted in western New York during the 1987 and 1988 waterfowl breeding seasons to identify locally nesting dabbling duck species, document key nesting habitats, and estimate nest success rates (NSR). Data were collected within a 7,963 ha area on the Iroquois National Wildlife Refuge and state- owned Oak Orchard and Tonawanda Wildlife Management Areas. Systematic nest searches were done in 4 grassland cover types: planted grassland, naturally seeded grassland, reverted cropland, and rights-of-way. The mallard (Anas platyrhynchos)and blue-winged teal (A. discors) were the predominant nesting species, comprising 39% and 53% respectively of the 338 nests found in grasslands. The overall nest success rate for mallards was .09 and the NSR for blue-winged teal averaged .21. Mallard nesting attempts were most successful in planted grassland (NSR = .28) and naturally seeded grassland (.11) and least successful in rights-of-way (1%) and reverted cropland (3%). Planted grasslands.

Download or read book The Influence of Habitat Features on Grassland Birds Nesting in the Prairie Pothole Region of North Dakota written by David Joseph Horn and published by . This book was released on 2000 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of habitat fragmentation studies on grassland and wetland birds are not consistent. Some studies have found positive relationships among abundance, nest success, field size, and distance to edges, whereas others have found no relationship. One reason for differing results may be the landscape composition in which the study took place. I examined how landscape composition influenced relations among: 1) occurrence and abundance of grassland songbirds and field size and 2) nest success of ducks, field size, and edges. I also investigated the effects of mowing on grassland songbirds, and how landscape features, such as amount of perennial grassland, and predator community composition influenced the nest success of ducks in fields. The study took place in the Prairie Pothole Region of central North Dakota during the 1996-1997 breeding seasons. Two types of 6.4 x 6.4 km study areas were selected based on the amount of perennial grassland they contained: 15-20% and 51-55%. The remaining portion of the study areas was primarily cropland and wetland.

Download or read book Effects of Agricultural Conservation Practices on Fish and Wildlife written by and published by . This book was released on 2008 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The bibliography is a guide to recent scientific literature covering effects of agricultural conservation practices on fish and wildlife. The citations listed here provide information on how conservation programs and practices designed to improve fish and wildlife habitat, as well as those intended for other purposes (e.g., water quality improvement), affect various aquatic and terrestrial fauna"--Abstract.

Download or read book Nesting Ecology and Population Genomics of American Black Ducks in North Carolina written by Daniel M. Lawson and published by . This book was released on 2020 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: North Carolina represents the southernmost extent of the American black duck's (Anas rubripes) breeding range; however, little is known about their breeding ecology in this region. I located and monitored 140 nesting black ducks over two years (2017-18) to assess nesting productivity and quantify nesting habitat within coastal North Carolina. Specifically, I quantified nest initiation, peak nesting dates, nest success rates, and causes of failure. I further assessed genetic integrity and population structure using high-throughput DNA sequencing methods and identified Anas platyrhynchos x A. rubripes hybrids using ADMIXTURE hybrid filial generation thresholds. Nests were found in brackish marshes (n = 105, 75%) within the Pamlico Sound, and on man-made dredge spoil-islands (n = 35, 25%) along the Outer Banks. The average nest initiation date over the study was April 16 with a peak nesting date of May 7. Apparent nest success rates varied from 31% (2017) to 63% (2018). Predation rates were 42% in 2017 and 28% in 2018. Nest predators included crows (Corvidae), raccoons (Procyon lotor), American mink (Neovison vison), and bald eagles (Haliaeetus leucocephalus).Using MCestimate, I found that the majority (73%) of variability in nest success was modeled best by nest location, vegetation density, maximum vegetation height, and elevation. Nesting black ducks selected high-marsh (NWI code E2EM1P) habitats where nests were located an average of 21.81 m from open water.at mean elevation of 1.36 m. In these habitats visual obstruction readings were 0.5 m with a maximum mean vegetation height of 0.81 m mainly consisting of grass (84.61%). Nesting density was 1 nest per 22 ha. Under the threat of sea level rise, identified selected nesting habitat will increase under the most liberal simulations, allowing for 42 more black duck nests with the study area. Results from my genetic analysis reveal that introgressive hybridization is occurring from the non-western game-farm mallard genome into this population of breeding black ducks. Breeding black duck management efforts in coastal North Carolina should focus on promoting selected nesting habitat, reducing nest predators, conserving lands for future marsh travel, and reducing game-farm mallard contact with black ducks.

Download or read book Duck Nest Success and Predators in North Dakota South Dakota and Montana written by Michael A. Johnson and published by . This book was released on 1987 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nesting Biology of Black Ducks and Mallards in Northern New England written by Malcolm W. Coulter and published by . This book was released on 1968 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Relating Predator Community Ecology and Duck Nest Survival in Eastern South Dakota written by Samantha R. Fino and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of Various Habitat Types by Nesting Ducks on Islands in the St Lawrence River Between Montr al and Trois Rivi res written by Luc Bélanger and published by . This book was released on 1995 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Studies published in the late 1970s and early 1980s have provided us with a better understanding of waterfowl nesting on Islands in the St. Lawrence River between Montréal and Trois-Rivières. The objective of our study was to describe the use of the islands by dabbling ducks and to assess the role of habitat characteristics (e.g., area, plant cover, human activities) in the selection of the Islands by waterfowl"--Abstract.

Download or read book Nesting Ecology of Ducks in Interior Alaska written by Michael J. Petrula and published by . This book was released on 1994 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study represents one of the first intensive efforts to locate and monitor duck nests in interior Alaska. We located 263, 409 and 450 nests of 12 duck species on Minto Flats in 1989, 1990 and 1991,respectively. We conclude that habitat for breeding waterfowl cannot be considered stable in interior Alaska. Flooding reduced the availability of meadows which precluded ducks from nesting in high-water years despite their presence during the Breeding Pair Survey.

Download or read book Effects of Two Haying Provisions on Duck Nesting in Conservation Reserve Program CRP Fields in South Dakota written by Kent A. Luttschwager and published by . This book was released on 1991 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Duck nesting in Conservation Reserve Program (CRP) fields was evaluated in 1989 and 1990 to determine the post-year effects of emergency haying.Due to severe drought some CRP fields were released in 1988 for emergency haying with the provision that 10% be left in idled strips and some fields were released in 1989 with the provision that 25% be left in idled blocks. Visual obstruction readings were used to index vegetation height-density. A cable- chain drag was used to find duck nests, and flush ring-necked pheasants (Phasianus colchicus) and white-tailed deer (Odocoileus virginianus) in 27 CRP fields in 5 eastern South Dakota counties. Duck nesting data in hayed and idled strips, hayed and idled blocks, and idled fields (not released for haying) were used to evaluate post-year haying effects on duck nest density and success. In 1989 mean residual and mean peak green growth vegetation visual obstruction readings in idled strips were significantly greater (P

Download or read book Effects of Weather on Breeding Ducks in North Dakota written by Merrill C. Hammond and published by . This book was released on 1985 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: