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 25 for “"microhabitat use"”.
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Microhabitat use and recolonisation in white-clawed crayfish: application to conservation
… and disease. This thesis investigates the microhabitat use of juvenile and adult white-clawed crayfish and quantifies the rate and pattern of recolonisation into an unoccupied reach of river. The microhabitat study was carried out over a 1 km stretch of the River Wansbeck, Northeast England …
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Small mammal microhabitat use and species composition at a wildlife crossing structure compared with nearby forest
… to the effects of reduced connectivity because of their limited mobility; however, few studies have evaluated their use of WCS. This study was conducted at a WCS under I-90 near Snoqualmie Pass, Washington. Our objective was to evaluate the small mammal species composition at the wildlife …
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Seasonal Microhabitat Use of Young-of-the-Year Bull Trout, Salvelinus Confluentus, in a Drought Year
This study examined the microhabitat use of young-of-the-year (YOY) bull trout, <em>Salvelinus confluentus, </em>throughout the summer and fall of 2015 in Gold Creek, a third order Cascade Mountain stream near Snoqualmie Pass, WA. It is crucial to understand YOY habitat requirements, as this life …
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Microhabitat use and its effect on growth of age-0 smallmouth bass in the North Anna River, Virginia
This study examined the relationship between microhabitat use and growth of age-0 smallmouth bass in the North Anna River. The study objectives were to describe microhabitat use during summer, assess the profitability of microhabitats, and determine if and how microhabitat use could determine which …
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Natural Environmental Gradients Predict The Microhabitat Use, Fine-Scale Distribution, And Abundance Of Three Woodland Salamanders In An Old-Growth Forest
… to gradients in environmental conditions. Because of their functional dominance in terrestrial ecosystems, woodland salamanders are responsible for the transformation of nutrients and translocation of energy between highly desperate levels of trophic organization (detrital food webs and …
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Short-term response of physical habitat and fish to the addition of large woody debris in two Appalachian Mountain streams
… in fish population parameters, and to observe microhabitat availability and use before and after L WD additions. In low-gradient Stony Creek, LWD was effective in modifying fish habitat through the formation of pools, the structuring of poo1/riffle sequences, and the enhancement of channel …
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Ecological niche responses of small mammals to gypsy moth disturbance
… populations exhibited extensive intraspecific microhabitat segregation. Female adults segregated from juveniles and male adults into more optimal microhabitats. Male adult microhabitat use significantly differed from male juvenile microhabitat use. The exclusion of young mice from optimal …
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Multi-scale patterns of habitat use by Roanoke logperch (Percina rex) in Virginia rivers: a comparison among populations and life stages
… This dissertation examines multi-scale habitat use patterns by logperch in three river systems in Virginia, including comparisons among rivers and life stages. The first study in this dissertation compares microhabitat use patterns of logperch among the Roanoke, Pigg, and Nottoway rivers. My …
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Patterns of habitat, microhabitat, and body size distribution in a lizard assemblage.
I investigated habitat use within an assemblage of four phrynosomatine lizards (Sceloporus graciosus, S. undulatus, Urosaurus ornatus, and Uta stansburiana) that are commonly syntopic in the pinyon-juniper woodland habitat on the elevated mesas of western Colorado. Lizard populations were censused …
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Ecological implications of introducing Leucaspius delineatus (Heckel, 1843) and Pseudorasbora parva (Temminck and Schlegel, 1842) into inland waters in England
… to the parasite fauna and overlaps in resource use. For sunbleak, these were also examined in terms of social integration of this species into a native fish assemblage. Biological resistance to topmouth gudgeon invasion was evaluated by stomach flushing and gut content analysis of native …
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The Ontogeny of Spatial Ecology and Habitat Use in a Population of Cottonmouths (Agkistrodon Piscivorus) in Southwest Missouri
… excluded from spatial ecology and habitat use studies. However, there is evidence that ontogeny, along with sex and reproductive condition, may play a large role in spatial distribution within snake populations. I tracked eight juvenile cottonmouths (Agkistrodon piscivorus) during the …
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Distribution, Movement, and Ecology of Etheostoma spilotum (Gilbert), the Kentucky Arrow Darter, in Gilberts Big Creek and Elisha Creek, Red Bird River Basin, Clay and Leslie Counties, Kentucky
… of movement patterns, identification of microhabitat use, and estimation of population size in both streams. Sampling was conducted during three seasons (spring summer, and fall) in 2013 utilizing a probabilistic sampling design, with a total of 752 microhabitat plots being sampled from …
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Longitudinal Patterns of Community Structure for Stream Fishes in a Virginia Tailwater
… over space and time. I characterized spawning microhabitat use and availability, and tested transferability of spawning microhabitat criteria for Etheostoma flabellare and Nocomis leptocephalus, two of the most common species in the Smith River. E. flabellare preferentially selected small and …
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Use of personality to improve reintroduction success: the effects of behavioural variation within release groups
… have investigated the proximate or ultimate causes of these individual differences. However, there is growing interest in their practical applications, particularly to conservation. Previous studies have shown that personality scores can affect individual behaviour response after release into a …
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Selection of benthic habitat by yellow-phase American eels (Anguilla rostrata)
… North American rivers, an understanding of the use and selection of habitat is important to conservation and management of the American eel. Yellow-phase American eels are often considered as habitat generalists, in part, because of their occurrence across a wide range of habitat types, but few …
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Microhabitat requirements of the great crested newt (<i>Triturus cristatus</i>) in a woodland area
… thesis aimed to increase our knowledge of the microhabitat use and ecology of great crested newts within a woodland area in the British Isles and suggest ways of improving measures for conservation. The study was conducted at Epping Forest Field Centre and surrounding deciduous woodland at High …
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Sources And Consequences of Ecological Intraspecific Variation In The Florida Scrub Lizard (Sceloporus Woodi)
… in foraging behavior of S. woodi and compared microhabitat use, behavior, diet, morphology, and ectoparasite load at a pine island site to S. woodi in scrub habitats. No variation in movement patterns existed between seasons and sexes. However significant seasonal and sexual differences did …
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Birds in coffee agroforestry systems of West Lampung, Sumatra
… in Southeast Asia. This study examines the use of coffee gardens and other habitats by birds in the Sumberjaya and Pesisir regions. Birds and their habitat use were surveyed, as were structural and floristic vegetation features. Interviews with farmers indicated land management practices and …
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The legacy of macroevolution: understanding and predicting evolutionary responses to novel environments
… of morphological traits and changes in microhabitat usage allows us to investigate the roles of these processes in generating variation in response to different habitats, and accounting for scale allows us to gain a more holistic picture of evolution. Understanding the role of …
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Life history of the endangered dwarf wedgemussel, Alasmidonta heterodon (Lea 1829) (Pelecypoda: Unionidae), in the Tar River, North Carolina and Aquia Creek, Virginia
… cycle, population dynamics, and habitat use of the dwarf wedgemussel (Alasmidonta heterodon) were studied in populations from the Tar River, North Carolina and Aquia Creek, Virginia during 1991 and 1992. This mussel is a long-term brooder, spawning in late summer and becoming gravid in …
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