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 22 for “"character evolution"”.
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Phylogeny and character evolution in the Lampranthus-group (Aizoaceae-Ruschioideae)
… Lampranthus, was studied using morphological characters and DNA sequence from the trnL - trnF region of the chloroplast genome, the nuclear ribsomal internal transcribed space (ITS) region and the 5S non-transcribed spacer. The phylogenies 59 species in the 29 genera of succulent Aizoaceae, …
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Phylogenetic Relationships and Character Evolution of the Neotropical Butterfly Genus Hamadryas (Nymphalidae: Biblidinae)
… Furthermore, this dissertation provides testable evolutionary hypotheses about the pattern of change for some of their most interesting natural history characters such as sound production and sexual dimorphism. The dissertation is organized in three chapters that can be visualized as manuscripts …
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Marked Superheroes and Villains: 21st Century Embodied Rhetorics of (Dis)Abilities and (Hyper)Masculinity
… Manifestations of Superhero Strength, Character Evolution, and Mental and Emotional Dis/Abilities</p> <p>III. Savage! Vanished! Appropriated!: Misrepresentations of Native Americans in Green Arrow</p>
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The phylogenetics, taxonomy and biogeography of African arid zone terrestrial birds : the bustards (Otididae), sandgrouse (Pteroclidae), coursers (Glareolidae) and Stone Partridge (Ptilopachus)
… aim of this research is to use insights from the evolutionary relationships of these families to assess the current state of their taxonomy, as well as to assess character evolution and other life history attributes (including evolution of their mating systems).
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Molecular and morphological phylogenetic analyses of Euphorbia L. (Euphorbiaceae) with an emphasis on Southern African representatives
… within the monophyletic groups. Morphological characters recovered broad groups within Euphorbia. Due to inadequate sampling in some sections, modifications in the present classification of Euphorbia are not suggested. The total evidence tree was used to explore morphological character …
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A Phylogenetic Analysis of Species Relationships in Hemlocks, the Genus <em>Tsuga</em> (Pinaceae).
… biochemical, and molecular sequence data. Characters obtained from published and unpublished literature were combined with new morphological characters from seeds, seedlings, and leaf cuticle material. Results from parsimony analyses of these characters differed from the published molecular …
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Relações filogenéticas na família Balanidae (Leach, 1917) sensu Newman & Ross, 1976 (Crustacea, Cirripedia)
… aspects of soft and hard parts provided 70 characters. The hypothesis of relationship were obtained through PAUP, software packages using Fitch parsimony as the optimization criterion.As a result, 252 trees with 125 steps (ci = 0.728; ri= 0.87) were obtained. The strict consensus tree showed …
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Hidden Diversity of Madagascan Freshwater Crabs (Brachyura: Potamoidea) Revealed by Morphological and Molecular Studies
… the tree. Chapter 4 reconstructs ancestral character states by mapping morphological characters onto the molecular phylogeny of the Malagasy freshwater crabs to better understand character evolution in these crabs. Character states of the mandibular palp, the ambulatory legs, and the …
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Studies on the evolution of morphological traits in ferns, with an emphasis on the family Dipteridaceae.
… that seed plants occupy today. Studying the evolution of characters within this separate line of evolution to the seed plants is thus useful in understanding the variability and distribution of extant plant life. My dissertation comprises of several studies that look into the evolution of …
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Integrating genomic, transcriptomic and developmental approaches to investigate coloniality and life cycle evolution in the Hydractiniidae (Hydrozoa: Cnidaria)
Integrative approaches to evolutionary biology yield rich data through which we can truly begin to understand the marvels of life. This dissertation integrates genomic, transcriptomic, and developmental approaches to understand the evolution of prominent life history characters of the cnidarian …
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Hiding in plain sight: accounting for rate heterogeneity in trait evolution models
… work on two main themes. First, most phenotypic evolution is not independent of other phenotypes. Changes in a particular character may influence changes in another and modeling these characters in isolation can mislead our inferences. Second, evolutionary change is heterogeneous. Not all species …
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Petal cell shape and flower-pollinator interaction in Nicotiana
… This project aims to further understand character evolution of petal cell shape in Nicotiana and its implications in pollination systems, combining tools of molecular biology, morphology and pollinator behaviour experiments. First, using a candidate gene approach, I explore in parallel …
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Phylogeography and the evolution of correlated traits under multiple origins of aposematism in the poison frog family
… only for one, but also for several inheritable characters at the same time. Well-sampled and well-supported phylogenies are necessary for the studies of character evolution and their history. The poison frogs (Dendrobatidae) are a well-known example of aposematism in anurans. They include ~270 …
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The Origin and Early Evolution of the Dinosauria
… This dissertation looks at the earliest evolution of the clade Dinosauria by focusing upon the interrelationships of the major subsidiary clades within it. It does this following examination, comparison and description of early dinosaur material, and by utilising modern phylogenetic …
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Systematic studies in the tribe Amaryllideae (Amaryllidaceae)
… classification and an enquiry into the tribe's evolution. The focus is on the monotypic Kamiesbergia Snijman and Carpolyza Salisb., Hessea Herbert (nine species), Namaquanula D. & U. Muller-Doblies (three species) and Strumaria Jacq. (23 species), for which a full taxonomic treatment is given. …
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Systematics of the Freshwater Amphipod Genus <i>Crangonyx</i> (Crangonyctidae) in North America
… programs (PAUP, Hennig86, MacClade) based on 26 characters. Wagner parsimony produced 18 parsimonious trees and Fitch parsimony produced 45 trees. The consensus tree of both methods and a hypothesis phylogenetic tree of the North America species of Crangonyx are developed along with a discussion …
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Phylogenetics and biogeography of Australian subterranean Parabathynellidae.
… their diversity, some aspects of character evolution and their biogeographic history within Australia. In addition, taxonomic descriptions are provided for the first parabathynellid species from South Australia. For the first data chapter molecular sequence data from the …
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Vision and Bioluminescence in Cephalopods
… light environment affects the ecology and evolution of vision and bioluminescence through an examination of cephalopods, a highly visual group that exhibits a broad diversity of eye adaptations and multiple evolutions of bioluminescence. My research investigates (1) vision and behavior in a …
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The Role of Cognitive Dissonance in Fin de Siècle Jamesian Narratives
… Subsequent analyses of narrative subtleties and character evolution in James’s major works of fiction have often been considered through constructs of psychological realism. One particular aspect of the majority of early Jamesian criticism highlights the connections between stringent Victorian …
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Oviraptorosauria: Morphology, Phylogeny, and Endocranial Evolution
… for informing the origin of modern birds and characters that make birds distinctive among living vertebrates, including the origin of flight. The current list of shared similarities between oviraptorosaurs and modern birds includes such striking features as loss of teeth, extreme …
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