Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"dens"”.
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Lateral atlanto-dens interval variation in a normal South African population using Computed Tomography
… of the cervical spine, the lateral atlanto-dens interval (LADI) is routinely observed and can readily be measured. Although values greater than the upper limit of normal may indicate atlanto-axial subluxation or ligament rupture, it is uncertain what the upper limit of normal for this …
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Space use behavior and multi-scale habitat selection of American marten (Martes americana) in northeastern Minnesota
… forest cover types. Rest sites and reproductive dens facilitate recruitment and protect marten from predators and inclement weather during periods of inactivity. We located 200 rest sites and 31 reproductive dens and measured vegetative characteristics at 31 reproductive dens, 62 rest sites, and …
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Den Tree Avaliability and Denning Success of Black Bears on Industrial Forest Lands and National Forest Lands in Virginia and West Virginia
… forest lands and 5 on industrial forest lands. Densities of potential den trees ranged from 12.5/km2 to 437.5/km2 on the national forest lands and on the industrial forest lands the densities ranged from 0-187.5/km2. There were significantly higher densities (F1, 69=5.86, P=0.0181) of potential …
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Reproduction, Survival, and Denning Ecology of Black Bears in Southwestern Virginia
… tulipifera</i>; <u>n</u> = 1) were used as tree dens. Habitat characteristics did not differ between ground dens and tree dens; however, older bears used ground dens more frequently (<u>Z</u> = -2.484, <u>P</u> = 0.013) than tree dens. Fifty-seven percent of bears denned on public land, and we …
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Reproductive biology and denning ecology of Virginia's exploited black bear population
… February in 1996. Pregnant females did not enter dens earlier (T=0.74, P=0.4598) than other bears, and did not emerge later (T=-1.69, P=0.0925) than other bears. cavities in trees and snags composed 82.4% (n=56) of all dens. Red oak (<i>Quercus rubra</i>) and chestnut oak (<i>Quercus prinus</i>) …
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Effects of Wildfires on Rattlesnake (Crotalus Oreganus) Growth and Movement in Washington State
… The snakes from the Methow Valley region, in dens affected by the Carlton Complex wildfire of 2014, showed no difference in growth rates before as compared to after the fire, which may be because those snakes have not had sufficient time to respond to potential changes in their prey …
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Population dynamics of Virginia's hunted black bear (Ursus americanus) population
… During winters 1995–2001, located 215 dens of radio-collared bears; 68% were in trees. Ground dens used by bears included nests in laurel thickets, excavations, brush piles, and rock cavities. The proportion of bears using tree dens did not differ between our 2 study areas (n = 203, ÷ …
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Kinetic modeling of the hydrotreatment of light cycle oil/diesel
… based on structural contributions was applied. DENs and DENt are the denominators of the Hougen-Watson rate expressions for hydrodesulfurization of dibenzothiophene (DBT) and methyl-substituted dibenzothiophenes contained in the LCO. Both denominators comprise the concentration of all adsorbing …
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Aspects of Mammalian Predation on Upland Nesting Waterfowl in Central North Dakota
… nests was examined in relation to nest density, vegetation cover, distance from roads, active predator dens, and other artificial nests in a plot. Survival of artificial nests was also compared between an area with predator control and one without predator control.</p> <p>Artificial …
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The Influence of Heterogeneous Landscapes on Banded Mongoose (Mungos mungo) Behavior in Northern Botswana: Inferences about Infectious Disease Transmission
… identified the important characteristics of dens across land use areas. In human-modified environments, man-made den sites persisted longer than did natural dens which became unsuitable through environmental processes (e.g., collapse). We also document the occurrence of nighttime activity for …
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Ecology of the eastern quoll dasyurus viverrinus, (Dasyrudae: Marsupialia)
… during the post-weaning period, when population density was greatest. Quolls were opportunistic predators of insects and small prey but consumed carrion and vegetable matter when it was available. Seasonal fluctuations in insect abundance and availability were reflected in the diet. Lepidopteran …
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Ecology of the eastern quoll dasyurus viverrinus, (Dasyrudae: Marsupialia)
… during the post-weaning period, when population density was greatest. Quolls were opportunistic predators of insects and small prey but consumed carrion and vegetable matter when it was available. Seasonal fluctuations in insect abundance and availability were reflected in the diet. Lepidopteran …
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Evaluating Campylobacter spp at the human-wildlife interface
… as mongooses utilizing man-made structures as dens had significantly higher levels of C. jejuni than mongooses using natural dens (p=0.019). A similar association was found across all wild mammals with significantly greater number of urban dwelling species positive for C. jejuni than urban …
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Red fox ecology and interactions with piping plovers on Fire Island, New York
… reproduction, survival, and population density. We used GPS data to investigate red fox space use, habitat selection, and responses to piping plover nest exclosure setup, pre-hatch pipping, and hatching. We used fecal dietary analyses and data from den prey item surveys to quantify the …
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Ecology and growth of Tamias palmeri and testing of a protocol to monitor habitat relationships
… correlated with slope. Timing of emergence from dens by juveniles was earlier and weights of juveniles were greater in ravine areas as compared to upslope areas. Track plates were not correlated with trap captures. Track plate success was not correlated with habitat variables. The results of this …
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Ecological Impact of Epigeal Termitaria on Vertebrates in the Tsavo Region of Southeast Kenya
… (mounds) used by many other species as dens, lookouts or food sources. The role of termite mounds in biological communities is relatively unknown, despite their ubiquitous nature. I investigated their impact on vertebrates in the Tsavo region of Kenya. Through the characterization of …
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Vertebrated Richness of Waterfowl Production Areas in the Prairie Pothole Region of Minnesota
… from field observations, tracks, droppings, dens, or lodges. Diversity was measured using species richness. While it appeared to have the highest species richness, the Border Prairie region was not significantly different from other regions. Species richness was directly related to WPA size. …
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Home range, site fidelity, reproductive ecology, and den site characteristics of the San Clemente Island fox
… since the 1970s. Females used two or three dens in succession and dens were almost exclusively found in rock crevices. Five of 23 foxes had home ranges that included supplemental food sources and human habitation, including all four females observed with pups, suggesting this could be a …
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Home Range, Home Range Expansion, Dispersal, and Mortality of Juvenile Red Foxes in Southeastern South Dakota
… 1977. The majority (88%) of the active red fox dens was located in pastures and idle lands although these cover types constituted only 24% of the available cover. Twenty-nine juveniles and 3 adults were captured and marked during spring, 1976. Trappers and hunters returned 62% of the tags placed …
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Fox-Prey Relationships in Eastern South Dakota
… and in or near check areas were examined. Fox densities in the study areas in 1966 were low compared to past densities in certain other states. Aerial den counts showed that active fox dens were 67% fewer on the reduction than on the check areas in 1966. Fox reproductive rates increased in the …
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