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 13 of 13 for “"Pattern variation"”.
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Phylogeography and Diversification of the Greenish Blue Butterfly (Plebejus Saepiolus) in Western North America
… of the Pleistocene, can influence dispersal patterns and create a disjunct and complex distribution in a species range. The Greenish Blue Butterfly, Plebejus saepiolus (Lycaenidae, Polyomattini), is a species which is widespread in North America, but populations are restricted to montane …
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Phylogeography and Diversification of the Greenish Blue Butterfly (Plebejus Saepiolus) in Western North America
… of the Pleistocene, can influence dispersal patterns and create a disjunct and complex distribution in a species range. The Greenish Blue Butterfly, Plebejus saepiolus (Lycaenidae, Polyomattini), is a species which is widespread in North America, but populations are restricted to montane …
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A contribution to species delimitation and taxonomy of North American Entomobrya (Collembola: Entomobryidae)
… solely on traditional morphological and color pattern characters provide a very conservative estimate of actual species diversity. Many described species in the genera Orchesella, Isotomurus and Lepidocyrtus have been shown to comprise complexes of several morphologically cryptic species …
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Insect Development and Evolution: Perspectives on Individual and Colony-Level Phenotypes
… colonies. The first four chapters focus on wing patterning in the bella moth Utetheisa ornatrix. I begin by quantifying the pattern variation in the species, then attempt to identify some of the mechanisms that give rise to the observed phenotypic differences. After describing how the primitive …
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The maintenance of variation in Cyprinodontiformes
Maintenance of genetic variation in the face of strong natural selection is a long-standing problem in evolutionary biology. Two extreme examples of this are the guppy (Poecilia reticulata) and the bluefin killifish (Lucania goodei), two freshwater species in the order Cyprinodontiformes with …
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Systematics and reproductive biology of the genus Morus L. (Moraceae)
… the population level, I studied sex expression pattern variation between the Morus native-exotic pair in the Flint Hills region, and assessed hybridization between these species at Konza Prairie Biological Station (KPBS). Both species are subdioecious, and Flint Hills populations exhibit …
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The ecological, behavioral, and genetic factors influencing the diversification of Lake Malawi's rock -dwelling cichlids
… is advocated with reference to this phylogenetic pattern. A population genetic survey of allele frequency distributions at four microsatellite loci is used to quantify levels of gene flow within the mbuna genus Metriaclima. Results from this study indicate that migration rates between adjacent …
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Utilizing automatically collected smart card data to enhance travel demand surveys
… as well as frequency of usage, and travel pattern variation at a much larger scale than is possible with manually collected survey data. Transport for London (TfL), the public body responsible for all transportation services in London, was chosen as a case study to determine how and to what …
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Developmental Basis of Wing Pattern Diversity in Heliconius Butterflies
… biological diversity. Heliconius butterfly wing patterns provide an excellent example of this diversity. In particular, the species H. melpomene and H. erato display wide variation in wing pattern across their ranges in Central and South America, but wherever they co-occur, they have converged on …
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A quantitative fluoroscopic study of the relationship between lumbar inter-vertebral and residual limb/socket kinematics in the coronal plane in adult male unilateral amputees. (Exploring the spine and lower limb kinematics of trans-tibial amputees).
… been identified. Finally, inter-vertebral motion pattern variation has been associated with chronic low back pain in the literature. It was discovered that there was more interdependence in passive inter-vertebral motion between and across levels in below knee amputees than controls in terms of …
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Hybridization and the genetics of wing colour-pattern diversity in Heliconius butterflies
… important source of genetic and phenotypic variation, upon which natural and/or sexual selection can operate. Hence, the idea that hybridization can actually promote diversification is becoming increasingly supported. In this thesis work, I explore the role of hybridization in the origin of …
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Debt detection and debt recovery with advanced classification techniques
… debt detection experts, there are usually some patterns in the sequence of activities of customers who commit debts. The patterns indicating the customers’ intention to be overpaid can thus be used to discover or predict debt occurrence. The development of debt detection and recovery over …