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 18 of 18 for “"fluctuating asymmetry"”.
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Variation in fluctuating asymmetry among nine damselfly species.
Fluctuating asymmetry (FA), measured as random deviations from bilateral symmetry, likely results from developmental disturbances by internal or environmental stresses. However, comparisons of FA in single damselfly species (Odonata: suborder Zygoptera) from stressed environments have often been …
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Using Fluctuating Asymmetry to Understand the Biological Implications of Social Race
No abstract prepared.
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Fluctuating asymmetry as a measure of developmental instability in Arikara bioarchaeological assemblages
Fluctuating asymmetry (FA) has been advanced as a tool for investigating the developmental instability of human populations and has more recently found its way into bioarchaeological investigations. The research presented here seeks to build upon those investigations and determine whether specific …
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Expression of fluctuating asymmetry in primate teeth: Analyzing the role of growth duration
… and developmental noise (DN) by examining fluctuating asymmetry (FA) in a non-sexually selected and a sexually selected structure. FA occurs as small, random deviations from bilateral symmetry without any directionality between sides. Extended periods of growth may provide a `window of …
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Variations in Phenotypic Plasticity and Fluctuating Asymmetry of Leaf Morphology of Three Quercus (Oak) Species in Response to Environmental Factors
… confounded with phenotypic plasticity and fluctuating asymmetry (FA). However, the study of variation is mostly limited to leaf morphology. This study was extended to plasticity and FA variations in <em>Q. alba</em> (white oak), <em>Q. palustris</em> (pin oak), and <em>Q. velutina</em> …
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A Study of Habitat Selection and Fluctuating Asymmetry of <em>Amybstoma tigrinum</em> at Henderson Island Wildlife Management Area in Jefferson County TN.
… the salamanders and to detect any difference in fluctuating asymmetry (FA) between larval populations in a large, permanent pond and an ephemeral wetland. Drift fences were installed with pitfall traps at selected locations around each pond to determine nonbreeding habitat use by adults. Most …
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Human skeletal asymmetry. A study of directional and fluctuating asymmetry in assessing health, environmental conditions, and social status in English populations from the 7th to the 19th centuries.
Asymmetry is a useful tool for osteological analysis as it detects disruptions in the developmental stability of osseous structures attributed to environmental and biomechanical environments. The primary aim of this study is to establish a baseline for normal levels of asymmetry in English …
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Developmental, ecological and biological drivers of macroevolutionary trajectories of postcranial morphological diversification in bats
… 3) measuring the presence and magnitude of fluctuating asymmetry across humeral prenatal development, 4) evaluating the role of foraging and roosting behaviour in humeral morpho-biomechanical diversity found in modern bats, and 5) assessing the role that phylogeny, ecology and biology have …
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On the Effects of Stress, Resistance to Stress, and Developmental Stability On Life History Characters In <em>Drosophila Melanogaster</em>
… and their developmental stability as measured by fluctuating asymmetry. The theoretical implications of this and other stresses and selection pressures that may be operating in <em>Drosophila melanogaster</em> and other taxa are discussed.</p>
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A Study of Asymmetry in Mosquitofish Populations in Polluted and Nonpolluted Environments Using a New Scale Staining Technique.
Levels of fluctuating asymmetry were compared in two populations of mosquitofish (Gambusia affinis) from polluted waters and two populations from nonpolluted waters. Two of the characters studied, pectoral fin rays and lateral line scales, showed no asymmetry in these populations and therefore …
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Inheritance of Dorsal Fin Coloration in the Metriaclima Species Complex (Teleostei: Cichlidae) of Lake Malawi
… Two meristic variables displayed significant fluctuating asymmetry in F, hybrids relative to parental and control groups, but this degree of asymmetry was less than predicted under a null model. UPGMA clustering resulted in M. thapsinogen and M. emmiltos grouping closer together than …
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Social behavior and kinship in the four-toed salamander, Hemidactylium scutatum
… stress or genetic diversity within populations. Fluctuating asymmetry, differences in the bilateral symmetry of a character due to disturbances in internal or external environments, influences color pattern in many in amphibian taxa and has the potential to be used as an indicator of at-risk …
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Bilateral Asymmetry in Incisors: Implications for Miocene Hominoid Species Diagnosis
… University at Carbondale. TITLE: BILATERAL ASYMMETRY IN INCISORS: IMPLICATIONS FOR MIOCENE HOMINOID SPECIES DIAGNOSIS MAJOR PROFESSOR: Dr. Robert S. Corruccini The primary purpose of this dissertation is to show how knowledge of variation and asymmetry in incisor antimeric pairs of living …
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Bilateral Asymmetry in Chickens of Different Genetic backgrounds
… measures of stability were type and degree of asymmetry of bilateral traits and heterosis. Higher relative asymmetry (RA), which was defined as (|L-R| / [(L+R)/2]) x 100, was observed in lines of White Leghorns selected 23 generations for high or low antibody response to sheep red blood cells …
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Population genetic history of the British roe deer (Capreolus capreolus) and its implications for diversity and fitness
… Therefore, fitness of roe was examined using fluctuating asymmetry (FA) of 10 skull traits as an indicator of developmental stability. Correlations of FA and genetic diversity indices were examined at the level of individuals within populations, across all populations and among populations. …
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BEES AND WASPS IN A CHANGING ENVIRONMENT: MULTIPLE RESPONSES TO ANTHROPISED LANDSCAPES
… dominula) and higher values of wing fluctuation asymmetry (a proxy for larval developmental stress) (A. plumipes, H. scabiosae, and P. dominula) were found in hotter and more fragmented urban areas. Furthermore, O. cornuta (in more fragmented urban areas) and A. plumipes (in hotter urban areas) …
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COST OF TRANSPORT, LOWER LIMBS ASIMMETRY AND THE DYNAMICS OF RUNNING.
… instability and genetic problems, is called Fluctuating Asymmetry (FA). In numerous studies regarding FA, it has been demonstrated that this index is related to several different features, like sexual selection, body mass, running performance in humans and in racehorses. Similarly, symmetry …