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 Effects of Agricultural Conservation Practices on Fish and Wildlife written by National Agricultural Library (U.S.) 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 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 Birdscapes written by and published by . This book was released on 2001 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 A Spatial Model of Waterfowl Nest Site Selection in Grassland Nesting Cover written by Duane Bruce Pool and published by . This book was released on 2004 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ducks Unlimited's (DU) mission statement is focused on providing for the annual lifecycle needs of migratory waterfowl. The largest impacts to the success and numbers of continental populations are determined by their activities on the breeding grounds. To model and therefore manage habitats and landscapes for ducks (Anas and Aythya spp.) it is necessary to understand several characteristics of their behavior. This research builds a model of nest site selection from nest probability based on remotely sensed data, presence data and minimum threshold theory. The methods used are applicable to other sensor platforms as well as other target species or phenomenon. Using data compression techniques, logistic regression, and spatial statistical functions (Ripley's k-function, a global k-function, and Multiple Response Permutation Procedure) we tested the observed point patterns and developed a point process model to predict nesting patterns. The application of this type of fine resolution da.
Download or read book The Impact of Human Landscape Features and Associated Predator Influences on Duck Nest Survival in the Prairie Pothole Region written by Scott Adam Abel and published by . This book was released on 2007 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Factors Affecting Duck Nesting in the Aspen Parklands written by David William Howerter and published by . This book was released on 2003 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Habitat fragmentation often has been cited as a cause for reduced reproductive success of grassland-nesting birds, including ducks, though results of many studies have been equivocal. As remotely sensed habitat data become increasingly available, an increased understanding of how habitat configurations affect demographic parameters will allow wildlife managers to make better decisions about habitat preservation and restoration. We used duck (Anas spp.) nesting data from 15 65-km2 study areas (n=6300 nests) dispersed throughout the aspen (Populus tremuloides) parklands of south-central Canada, to test hypotheses and build models that predict hatching rates and nest-site distributions in relation to landscape features. We constructed separate models using landscape features generated at 3 different spatial extents and using 3 different habitat classification schemes. Generalized linear mixed-modeling techniques were used to model hatching rates, and logistic regression was used to discr.
Download or read book Ducks Unlimited written by and published by . This book was released on 2005 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Mammalian Predator Removal and Other Factors Affecting Dabbling Duck Reproduction in North Dakota written by Pamela Renee Garrettson and published by . This book was released on 1999 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the prairie pothole region, high predation rates often reduce duck nest success below the 15-20% thought necessary for population stability. Lethal removal of mammalian predators of duck nests is one potential management option, but there is little reliable information about effects on nest success of removing mammalian predators without using poisons. On 16 4,150-ha blocks half of them trapped during spring and summer, I found higher (P0.001) nest success on trapped sites (45%) than on untrapped sites (17%). There were no year (P=0.296)year-treatment (P=0.423), or species-treatment (P0.895) effects. Nest success of blue-winged teal (Anas discors) and gadwalls (A. strepera)was higher than that of mallards (A. platyrhynchos) and pintails (A.acuta, P=0.028) on trapped and untrapped sites. Nest success was positively related to numbers of predators removed (P
Download or read book Golden winged Warbler Ecology Conservation and Habitat Management written by Henry M. Streby and published by CRC Press. This book was released on 2016-10-26 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Golden-winged Warblers (Vermivora chrysoptera) are migratory songbirds that breed in temperate North America, primarily in the Great Lakes region with remnant populations throughout the Appalachian Mountains, and winter in Central and northern South America. Their breeding range has contracted dramatically in the Appalachian Mountains and many populations have dramatically declined, likely due to habitat loss, competition and interbreeding with Blue-winged Warblers (Vermivora pinus), andglobal climate change.. As a result of population declines in much of the eastern portion of their breeding range, Golden-winged Warblers are listed as endangered or threatened in 10 U.S. states and in Canada and have been petitioned for protection under the U.S. Endangered Species Act. Published in collaboration with and on behalf of The American Ornithological Society, this volume in the highly-regarded Studies in Avian Biology series compiles extensive, current research on Golden-winged Warblers and summarizes what is known and identifies many remaining unknowns, providing a wealth of peer-reviewed science on which future research and listing decisions can be based.
Download or read book Duck Nest Success in the Prairie Pothole Region written by Albert T. Klett and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Northern Prairie Wildlife Research Center of the United States Geological Survey (USGS) presents the full text of an article entitled "Duck Nest Success in the Prairie Pothole Region," by Albert T. Klett, Terry L. Shaffer, and Douglas H. Johnson. The article discusses the nest success of mallard, gadwall, blue-winged teal, northern shoveler, and northern pintail for regions in North Dakota, South Dakota, and Minnesota between 1966 and 1984.
Download or read book Landscape Ecology of Mammalian Predators and Its Relationship to Waterfowl Nest Success in the Prairie Pothole Region of North Dakota written by Michael Lee Phillips and published by . This book was released on 2001 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Furthermore, the frequency of turn angles was highly variable in cropland. In contrast, skunk pathways did not differ between LGC and HGC landscapes. They were more influenced by wetlands than by the landscape composition of grassland. Skunks spent more time in back and forth movement in all habitats. The rate of movement was faster in cropland than in planted cover in LGC but not in HGC landscapes. When I simulated random combinations of predator movement and waterfowl nests there was essentially no relationship between planted cover patch size and the predicted proportion of nests that would be encountered by predators. However, the observed proportion of nests encountered by predators in intermediate sized patches (50- 120 ha) was frequently greater than the proportion predicted by random activity. This study has led to a refined understanding of how predators perceive the landscape and is an important contribution to both predator landscape ecology and waterfowl management.
