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Showing 1 to 20 of 35 for “"nesting sites"”.
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Landsat Evaluation Of Trumpeter Swan Historical Nesting Sites In Yellowstone National Park
… The purpose of this study was to map historical nesting areas for trumpeter swans in Yellowstone National Park (YNP) and evaluate Landsat images for changes to habitat. Historical nesting sites were evaluated through image classification and Normalized Difference Vegetation Index (NDVI) and …
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Hormone analyses of Black-Footed Albatross (Phoebastria Nigripes) at Midway Atoll NWR and Tern Island, Hawaiian Islands NWR
… The objective of this study was to determine if nesting in PCB-contaminated areas affects hormone balance due to endocrine disruption in both adult and chick black-footed albatross on Midway Atoll National Wildlife Refuge (NWR) and black-footed albatross chicks on Tern Island, Hawaiian Islands …
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Premigratory movements of a long-distance migratory species: the Wood Thrush (Hylocichla mustelina)
… and dispersed 307-5300 m from their natalsites to join flocks of conspecifics. About half (46%) of the young birds stayed in onedispersal site until migrating, but the rest visited other sites. In 40 instances, 15fledglings moved up to 6 km out of the dispersal site and, after 1-5 days, …
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Aspects of the ecology of Namib Desert ants
… ants' requirements for honeydew, nectar and/or nesting sites. The vast majority of ant species were not dependent on perennial vegetation and relied primarily on seeds, insects or both for food.
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Breeding and dispersal implications for the conservation of the Southern Ground Hornbill Bucorvus leadbeateri
Populations of secondary tree-cavity nesting bird species are often limited by a shortage of natural nesting sites. For the Southern Ground Hornbill Bucorvus leadbeateri that typically nests in natural tree cavities, the shortage of nesting sites is one factor potentially limiting population …
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A comparative study of honey mesquite woodlands in southern Nevada and their use by phainopeplas and other avian species
… compare avian community indices among the four sites, and (3) locate breeding Phainopepla populations and determine breeding season, nesting success, and habitat requirements. Groundwater was closest to the surface at Stewart Valley, which contained the oldest and largest tRees Moapa had the …
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Do wetland characteristics, specifically plant communities, surface water, and soils play a significant role in whooping crane (<i>grus americana</i>) site selection?
… analyzed throughout nineteen established nest sites and twenty non-nesting wetland sites. Due to past fire management throughout the refuge, the effects of fire history were also investigated by comparing burned (n=17) and un-burned (n=22) areas.</p> <p>A multi-dimensional scaling analysis did …
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Nest-site resources for cavity-nesting birds in the southern Allegheny Mountain forests of West Virginia
Cavity-nesting birds may be negatively impacted by a lack of proper nesting sites. Southern Allegheny Mountain forests of West Virginia are unique due to the juxtaposition and diversity of forest cover types. Management must focus on monitoring wildlife population levels as well as habitat …
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Productivity of A Resident Giant Canada Goose Flock in Northeastern South Dakota
… nest structures (ANS) available were used by nesting geese. Artificial nesting structures, islands, muskrat houses and peninsulas were used by geese as nesting sites. Mean clutch size of completed nests was 5.14 in 1974 and 5.26 in 1975. Mean clutch size was 5.38 on ANS and 4.89 on NNS for the …
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Helminth communities of ring billed gulls (Larus delawarensis) collected along the St. Lawrence River and Estuary
… communities of gulls collected in May from four nesting sites (Montreal, Sorel, Quebec City, Les Pilliers), suggesting that infective pools are widespread along the St. Lawrence. Adults arriving in April had light infections. Infection levels and diversity increased during the nesting season, and …
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Aspects of municipalities associated with occupancy of Chimney Swifts and Common Nighthawks in Illinois
… practices change, and the loss of available nest sites may be driving declines. To understand factors of decline, I conducted surveys in municipalities of varying size throughout Illinois and examined the influence of various habitat and landscape factors (e.g., land cover surrounding points, …
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Effects of Prescribed Burning on Black-Capped Vireo Habitat, Territory Establishment, and Production
… of prescribed buming on Black-capped Vireo nesting habitat, territory establishment, and production. This study was conducted in the Rock and Doe Pastures of the Area. In 1993, the North Rock, Middle Rock, South Rock, North Doe, and South Doe Pastures were surveyed for Black-capped Vireo …
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Use of Waterfowl Production Areas by Ducks and Coots in Eastern South Dakota
… of the habitat influenced the number of coots nesting on the area. Lowered water levels in 1971 left many emergents standing in very shallow water or on dry ground, limiting available nesting sites. Renesting by coots depended on the stage of incubation at the time of egg removal; 90 percent of …
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A wetland vulnerability assessment : consequences for the avian communities of saltmarshes
… to determine the impacts of sea level rise on nesting avifauna; and to derive recommendations for conservation practice.Vegetation classification methods using data from satellites and Unmanned Aerial Vehicles (UAV) for the Upper Mersey Estuary were explored. Satellite data failed to provide …
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Effects of biochar, subsoiling, and native seeding on the establishment of pollinator habitat in log landings
… and diversity of floral resources and bee nesting sites may assist in this goal. Log landings (areas where harvested timber is stored and loaded for transport) have the unique potential to act as early successional pollinator habitat in otherwise densely stocked forests. While challenged …
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Habitat Selection by weaver Birds in the Middle Zambezi Valley
… selection of particular habitats. A sample of 76 nesting colonies of the different weavers were described. 14 habitat and nesting colony features were measured and were analysed using principle component analysis (PCA). Food habits were determined by field observations supplemented by stomach …
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Habitat Selection by weaver Birds in the Middle Zambezi Valley
… selection of particular habitats. A sample of 76 nesting colonies of the different weavers were described. 14 habitat and nesting colony features were measured and were analysed using principle component analysis (PCA). Food habits were determined by field observations supplemented by stomach …
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Etude des facteurs écologiques et écotoxicologiques impliqués dans la réussite d’incubation chez la tortue luth, Dermochelys coriacea, de Guyane Française
… success is lower for this species than on other nesting sites, emphasising the problem of recruitment for the population. Understanding the causes of low hatching success is therefore an important conservation step towards preventing extinction in this population. During my thesis, I investigated …
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Characteristics of the nesting habitat of the black-throated blue warbler
… similarities of the vegetation surrounding these sites and to determine the contribution of each location to the description of the territory. Principle component analysis (PCA) was used to determine habitual variables correlated with the location of the nest and perches. Factors derived from the …
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Nest Predation by brown-headed cowbirds (Molothrus ater)
The reproductive success of parasites is entirely dependent on their ability to encounter suitable hosts. Obligate brood parasitic birds may increase host encounter rate, and consequently their reproductive output, if they cause unsuitable late-stage host nests to fail thereby stimulating the host …
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