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 30 for “"range overlap"”.
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Habitat Selection and Range Overlap of Moose and White-tailed Deer in the Boreal Plains of Saskatchewan
… uncommon in boreal forests, have expanded their range over the past 50 years. This expansion raises concerns about apparent competition, where one species increases predation or pathogen pressure on another. Such interactions are well documented between white-tailed deer and caribou; here, I …
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Monitoring for Chronic Wasting Disease in Mule Deer and White-Tailed Deer at Wind Cave National Park: Investigating an Emerging Epizootic
… biopsy for CWD testing; 2) evaluate home-range overlap and direct contacts for potential transmission of CWD; 3) determine probabilities of detection and death related to CWD from deer mortalities; and 4) examine sample size and smoothing parameters on home ranges from GPS collars on home …
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Ecology of the eastern quoll dasyurus viverrinus, (Dasyrudae: Marsupialia)
… early juvenile independence. The average home range size for males was 44 ha and for females was 35 ha. Although home ranges overlapped extensively, residents tended to avoid the areas used intensively by their neighbours. 'Neighbourhoods ' formed throughout the study area based on the extent …
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Ecology of the eastern quoll dasyurus viverrinus, (Dasyrudae: Marsupialia)
… early juvenile independence. The average home range size for males was 44 ha and for females was 35 ha. Although home ranges overlapped extensively, residents tended to avoid the areas used intensively by their neighbours. 'Neighbourhoods ' formed throughout the study area based on the extent …
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Topography as a determinant of range extent and overlap : a species level phylogenetic reconstruction and geographical range analysis of Syncarpha (Asteraceae)
Understanding what determines species' geographic range extents has several implications for questions in ecology, evolution and conservation biology. The Cape Floristic Region of South Africa is noted for its remarkably high geographic species turnover, often attributed to the exceptional …
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Evaluating Competition Between Sympatric Flying Squirrels (Glaucomys Spp.) In Northeastern Minnesota
… Climate change is causing unprecedented spatial overlap of previously allopatric species, which can lead to competition between species with similar niches. Northern flying squirrels (Glaucomys sabrinus) and southern flying squirrels (G. volans) have increasingly overlapping ranges due to warming …
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Demographics and ecology of an isolated population of the desert pocket mouse, Chaetodipus penicillatus sobrinus, in the Las Vegas Valley, Nevada
… C. p. sobrinus has significantly larger home range estimates compared to females. The maximum dispersal distance was 133 meters and sex-biased dispersal was not observed. Home range overlap varied between sexes. Female intrasexual overlap was significantly greater when compared to intersexual …
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Home Range, Activity Period, Burrow Use, and Body Temperatures of the Nine-Banded Armadillo (Dasypus Novemcinctus) on the Northern Edge of Its Range
… armadillo has been steadily expanding its range. This study examines some aspects of the armadillo's natural history at the northern edge of its currently expanding range. Armadillos were observed utilizing from one to four burrows and mulitiple individuals were found in the same burrow. …
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Winter/Spring Population Characteristics of White-Tailed Deer in an Agricultural/Wetland Complex in Northeastern South Dakota
… preference was assessed using 95 and 50% home range contours that were estimated using an adaptive kernel method. Agricultural crops (i.e., corn [Zea mays], row crops other than corn [e.g., soybeans [Glycine max]], small grains [e. g., wheat [Triticum aestivum]], and alfalfa [Medicago sativa]) …
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Modelling the spatial distribution of blackbird (Turdus merula) and ring ouzel (Turdus torquatus) in Switzerland
… lowlands up to the timber line. The altitudinal range overlap of the two species is up to 400 m. Despite both species coexist on macroscale, a direct niche overlap on territory scale is rare. Small-scale differences in vegetation cover and structure seem to play a dominant role for habitat …
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Home range and activity in a Virginia population of Sceloporus undulatus
… Virginia, was designed to determine whether home range size, home range overlap, and patterns of behavior reflected the requirements of polygyny. The lizards were seen most often on the piles of debris that characterized the study site. Home range size was most strongly influenced by the debris …
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Survival, Home Range and Spatial Relationships of Virginia's Exploited Black Bear Population
… (16.7%) were the causes of mortality. Total home range size for males and adult, subadult, and transitional age females were 7.2, 5.5, 5.6 and 7.2 km2 (95% MCP) and 11.2, 6.8, 9.0, and 10.0 km2 (95% normal kernel). Females with cubs had larger fall ranges than spring and summer ranges. Seasonal …
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Space Use And Habitat Selection By Bobcats In Southeastern Kentucky
… Mean annual minimum convex polygon (MCP) home range size for all bobcats was 14.7 km2 (n = 5, SE = 3.9 km2), and 22.2 km2 (n = 5, SE = 7.5 km2) using the adaptive kernel (AK) method. Mean female annual home range size was 17.4 km2 (MCP, n = 4, SE = 3.9 km2) and 27.4 km2 (AK, n = 4, SE = 7.5). …
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Ecology of raccoons at High Knob Recreation Area, Virginia
… 20.8% of aggregate weight, respectively. Home range sizes were larger among males (649.1 ± 112.6 ha) and females (239.0 ± 40.0 ha) at High Knob than home range sizes reported from high quality habitats, which may reflect the poorer quality of habitat at High Knob. Home range overlap was …
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Migratory Ecology and Movement Patterns of Mid-Continent and Eastern Sandhill Cranes
… harvested in the state. Although the historical range boundaries of these populations have not been in close proximity during the 20th century, EP cranes are currently experiencing a significant increase in population size and a concurrent expansion of breeding range. A better understanding of …
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Ecology of Mountain Lions (Puma concolor) in the North Dakota Badlands: Population Dynamics and Prey Use
… populations in the region. Annual adult home ranges averaged 231.1 km2 ± 21.8 [SE] for males and 109.8 km2 ± 20.2 for females; we did not see seasonal shifts in home range size or distribution for either sex. Home range overlap between adult males averaged 13.7% ± 2.4 [SE]. Average male …
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Comparative ecology of the endemic Cyprus Warbler and the congeneric Sardinian Warbler: Implications of recent coexistence
… Both species appeared to establish home-ranges without reference to the other species, resulting in considerable interspecific home-range overlap. A playback experiment indicated that Cyprus Warblers reacted equally strongly to conspecific and congeneric song in areas where the two …
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Holomorphology and systematics of the eastern Nearctic stonefly genus Remenus Ricker (Plecoptera: Perlodidae)
… and R. daniellae sp. n. However, sympatry and range overlap precludes the use of this character in distinguishing R. bilobatus and R. daniellae sp. n. Ova of the four species apparently lack distinguishing characteristics and thus are not separable at this time. Distribution maps, biological …
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Modeling Point Patterns, Measurement Error and Abundance for Exploring Species Distributions
… and subsequently developing measures of range overlap from posterior draws. This kind of simultaneous inference can potentially have implications for questions related to biodiversity and conservation studies. .</p>
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Dietary Shifts, Niche Relationships and Interspecific Competition in Sympatric Grey Langur (Semnopithecus entellus) and Purple-faced Langur (Trachypithecus vetulus) in Sri Lanka
… the behavior and ecology of organisms in a wide range of ecological communities. However, the broader role of interspecific competition in primate communities is unclear as relatively few studies have explored this question. This is especially true for folivorous primate communities, such as …
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