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 53 for “"small populations"”.
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Allee effects and the persistence of small populations
… in the establishment success of insect pest populations during the early phases of invasion. Secondly, to examine how spatial management at the point of introduction could render populations more vulnerable to the Allee effect and facilitate their eradication. Both aims are important, as …
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Demography, conservation, and management of small populations: Theory and applications.
Demography, conservation, and management of small populations: Theory and applications.
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The effects of population size on agathosma collina (rutaceae) and its conservation implications
… reasons, when population size becomes too small. Initially, therefore, a study was carried out to assess if there was any discernible effect of population size on the population structure. As predicted by theory, the demographic status of small populations was worse than larger ones, …
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Consequences of plant population size for pollinator visitation and plant reproductive success
… prominent role in determining the size of plant populations, and can affect plant-pollinator interactions. It is hypothesized that in small plant populations the ability to set seeds can be reduced due to limited pollination services, since individuals in small populations can receive less …
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Effects of Inbreeding on Endangered Red Wolves (Canis rufus)
… mating among close relatives, is widespread in small populations and a major concern in conservation biology because it can affect population persistence. The negative effects of inbreeding results in the evolution of inbreeding avoidance behaviors; within small populations, such behaviors may …
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The Role of Intraspecific Variation, Species Interactions, and Eco-evolutionary Feedbacks in Population Persistence
… and species persistence, especially in small populations. However, the role of some evolutionary processes, such as balancing selection mechanisms, in the persistence of small populations remains unclear. Furthermore, recent studies have shown that intraspecific trait variation (ITV) in …
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The Epidemiology and Health System Impact of Medium-Chain Acyl-CoA Dehydrogenase Deficiency Among Affected Children and Those with False Positive Newborn Screening Results in Ontario, Canada
… to estimating robust health event rates for small populations, this study described health services use among infants diagnosed with MCADD or received a false positive newborn screening result for MCADD from April 2006 through March 2010. Each cohort was compared with screen negative infants …
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A Comparison of Growth of Primary Mouse Marrow Explants
… cell in tissue culture has been limited. Small populations of cells have been successfully maintained and grown using chemically defined media and media enriched with non-defined constituents such as horse serum and chick embryo extract. However the media which are presently available are …
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Conservation Genetics of Threatened Gopher Tortoises, <i>Gopherus polyphemus</i>: An Assessment of Genetic Variation and Parentage in Two Populations in South Mississippi
… portion of their range for over twenty years, populations of the De Soto National Forest (DNF) in southern Mississippi experience low recruitment and lower hatching success than populations in the eastern portion of the range, and the causes of this are unknown. Previous work has shown that …
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MOVEMENTS, ACTIVITY RANGE, HABITAT USE, AND CONSERVATION OF THE JAMAICAN (YELLOW) BOA, EPICRATES SUBFLAVUS
… This vulnerable species is now fragmented into small populations throughout the island due to habitat loss, introduced species, human persecution and poaching. Conservation of the boa requires knowledge of the basic ecology of the boa and education of local people. Jamaican boas were studied in …
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MOVEMENTS, ACTIVITY RANGE, HABITAT USE, AND CONSERVATION OF THE JAMAICAN (YELLOW) BOA, EPICRATES SUBFLAVUS
… This vulnerable species is now fragmented into small populations throughout the island due to habitat loss, introduced species, human persecution and poaching. Conservation of the boa requires knowledge of the basic ecology of the boa and education of local people. Jamaican boas were studied in …
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Where's the Disconnect? Analyzing barriers to web-based e-participation tools for planning
… and community development departments that serve smaller, less densely populated areas; areas that by their remote or sparsely populated nature could benefit greatly from easily accessed information exchange. The purpose of this work is to provide a benchmark study for how online, e-participation …
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Habitat suitability and recommendation for the reintroduction of the European pond Turtle Emys Orbicularis (Lininnaeus 1975) to the area of community interest "Locknitztal" in Brandenburg (Germany)
… and the protection of the few still existing small populations. For the protection of the species, reintroduction to its former range is taken into consideration. The present study evaluates the habitat suitability of the nature reserve and FFHb (Flora-Fauna Habitat) area “Löcknitztal” …
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Genetic Assessment of Rare Blackbanded Sunfish (Enneacanthus Chaetodon) Populations in Virginia
… endangered status and individuals persist in six populations. Mitochondrial DNA (mtDNA) and microsatellite data were assessed to determine the genetic characters and gene diversity of the Virginia populations. The results of these analyses were then compared to five additional populations; four …
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Dynamic Mutation Rates and Extinction in Sexual Organisms
… rate in both finite and infinite randomly-mating populations. Germ-line mutator alleles, alleles that increase the genomic mutation rate, frequently occur when mutations alter the structure or regulation of genes involved in DNA repair, a fraction of the genome called the "repair genome”. The …
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Temporal Comparisons on the Genetic Variation of the Dusky Gopher Frog (Lithobates sevosus)
… temporal changes in genetic diversity within populations can provide vital information on future viability. The dusky gopher frog, Lithobates sevosus, exists in isolation with an estimated population size of 100-200 individuals, and previous research has shown that low genetic variability …
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Is it all about the ants? What are the factors influencing the presence of Plebejus argus (the Silver-studded Blue butterfly) on Studland Peninsula?
… throughout most of its range in the UK and its small populations are particularly vulnerable to local extinction.Current research ascertains that early successional vegetation, with a high abundance of host plants and the presence of the symbiotic Lasius ant species, is vital for the longevity …
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Farmers' markets as contested sites: From neoliberal redevelopment governance to lifestyle activism
… markets in the United States is due in no small part to their compatibility with and incorporation into the entrepreneurial strategies through which cities strive to be competitive. Here cities put these markets in the service of creating a marketable urban image and producing ideal …
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Genomics of Climatic Adaptation in Populus Trichocarapa
… the local pattern of growth and dormancy in tree populations is expected to become uncoupled with shifting seasonal environmental signals, particularly temperature. Thus, an understanding of the genetic underpinnings of local adaptation is key to predicting the fate of tree populations in the …
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Minimum-error, energy-constrained source coding by sensory neurons
… error is reduced in simulations of small populations of independent neurons. This suggests that jittered spike-trains provide a method for small populations of sensory neurons to improve encoding error. Finally, a sound coding method for applying the neural source coder to timing …
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