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.
Results
Showing 1 to 15 of 15 for “"physiological costs"”.
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The physiological costs of arm motions while sitting and standing
Call number: LD2668 .T4 1968 H35
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A study of the physiological costs of symmetrical and simultaneous motions
Call number: LD2668 .T4 1966 J43
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A study of the physiological costs of symmetrical and simultaneous motions
Call number: LD2668 .T4 1966 J43
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Physiological costs of total cholesterol in European starlings across an urban to rural gradient
… (2) does elevated cholesterol come at a physiological cost to birds, and (3) to what extent are parental and nestling cholesterol correlated? We found that starlings from urban habitats showed elevated cholesterol compared to rural birds, and this difference increased with age. …
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Sexual dimorphism in the genus Leucadendron : Morphology and plant hydraulics
… serotinous females may incur extra resource costs in order to keep their transpiring cones alive between fires. This hypothesis predicts that the female morphology might be associated with more efficient resource acquisition compared to males in order to support their greater resource …
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Eco-physiological and molecular manipulation of leaf-level primary and secondary metabolism by arthropod herbivory
… resources for growth but often introduces unseen physiological costs mediated by a reallocation in resources from growth to defense or by alterations to primary and secondary metabolism. The type of feeding damage depends on the mouthparts of the herbivore and, in part, determines the magnitude …
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Thermoregulatory behavior of the crayfish Procambarus clarkii in a burrow environment
… the benefits of evaporative cooling, without the physiological costs incurred by long-term exposure to air.
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Pastoralism, Agriculture, and Stress: A Comparative Analysis of Two 19th Century Qing Dynasty Populations
… population is less likely to experience elevated physiological stress than a comparatively sedentary, aggregated, agriculture-dependent population. Three different indicators of subadult systemic stress were assessed in skeletal samples of two historic 19th century populations from the Qing Empire …
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Effect of glove port height on upper body stress for performing laboratory work
… ports on the efficiency of task performance and physiological costs of work for the glove box users. Seven male and two female participants performed liquid mixing and vial filling tasks within a portable glove box. The tasks were designed to simulate common glove box tasks performed in …
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Street-wise : does prey abundance buffer black sparrowhawks (Accipiter melanoleucus) from the negative health impacts of urbanisation?
… make use of human-subsidised resources; but the physiological costs and trade-offs faced by urban-dwelling species are poorly understood. Given that their range in South Africa has only recently expanded into the human-dominated landscapes of the Western Cape, the Black Sparrowhawk (Accipiter …
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Social and environmental causes and reproductive consequences of ornamented plumage in the Red-backed Fairywren (Malurus melanocephalus)
… maintained, the social cost hypothesis and the physiological cost hypothesis, using the Red-backed Fairywren (Malurus melanocephalus). Male Red-backed Fairywrens typically exhibit ornamented red-black breeding plumage, but this species offers unique opportunities to test the mechanisms that …
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Can sociality buffer the impacts of climate change on a cooperatively-breeding bird, the southern pied babbler Turdoides bicolor?
… implemented a non-invasive method for collecting physiological measurements (daily energy expenditure and water turnover). I also tested for the influence of interactions between weather and group size variables because the presence of significant interactions would provide evidence in support of …
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Phenotypic consequences of adaptive toxin production and resistance in coevolutionary partners
… conserved across vertebrates would have similar costs in snakes. However, many specialized adaptations evolve repeatedly. For example, TTX resistance has evolved independently at least three or four times in Thamnophis, which suggests selection may favor specialization in specific environments. …
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Constraints on plant resistance and tolerance trade-offs
… in the context of ecological trade-offs and costs of tolerance (Strauss et al. 2002). It was initially theorized that resistance and tolerance represented two alternative and redundant defense strategies given limited nutrients and energy available in the struggle against hervbivory (van der …
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The responses of subtropical nearshore fishes to climate change
… all been shown to result in varying degrees of physiological disturbance in organisms across ecosystems, yet little effort has been devoted to understanding the magnitude of these disturbances in nearshore fishes across seasons. Moreover, few studies have investigated the synergistic (or …