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 19 of 19 for “"metabolic costs"”.
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Ecological Aspects of Insect Detoxication Enzymes and Their Interaction With Plant Allelochemicals
… to phytosynergists among insect species, and metabolic costs of MFO induction are investigated in a series of experiments.
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An Examination of the Basis for Poor Growth Performance in the Hybrid Grass Carp
… causes of the low energy intake and the large metabolic costs that effect the poor growth performance of the hybrid.
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Inducible Chemical Defenses in Temperate Reef Sponges of the South Atlantic Bight, U.S.A.
… consumers while simultaneously minimizing the metabolic costs of maintaining these defenses. To investigate if reef sponges in the South Atlantic Bight employ inducible chemical defenses, I tested two predictions with Ircinia campana, I. felix, and Aplysina fulva. First, concentrations of …
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Autonomous active ankle exo-skeleton devices provide metabolic cost reduction
… an experiment that looks to confirm the metabolic cost decrease associated with the usage of an autonomous active ankle exoskeleton. The primary method to identify the associated metabolic costs was through the comparison of cardiovascular and respiratory activity during gait with and …
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Distribution of leaf dissection and sclerophylly along microhabitat gradients in pteridophytes of the Cape peninsula
… low-light environments, perhaps because of lower metabolic costs or to reduce self-shading.
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Water and energy balance in the Namib sand-dune lizard, Angolosaurus skoogi
The field metabolic rate (FMR) and water flux of the herbivorous Namib sand-dune lizard, Angolosaurus skoogi, was measured during the summer non-breeding period (early January) by means of doubly labelled water. FMR was about half that expected for a lizard of this size. Water flux and laboratory …
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Mono-Oxygenase Activity and Nutritional Ecology of Larvae of the Gypsy Moth, Lymantria Dispar
… fed a poor quality food may incur increased metabolic costs and decreased lipid stores.
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Swan-plant interactions in a chalk river catchment.
… between spring and summer, which reduced the metabolic costs of river feeding and increased the relative profitability of aquatic food resources. I used a mathematical population model and an individual-based behavioural model respectively to explore two management options for the alleviation …
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Effects of drifting prey abundance on food consumption and growth of brook trout in Shenandoah National Park
… or to excess temperatures and increased metabolic costs. Purposes of this study were to quantify the relation between prey density and food consumption in brook trout, identify how diel feeding and prey size selectivity by brook trout affect the relation, and to determine if slow growth …
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Marine Biodiversity of Antarctic Hard Rock Communities: Species Biomass and Energy Use
… community structure did not vary seasonally, low metabolic costs due to slowed growth rates, reproduction, development with the ability to cease feeding for the winter months may explain the lack of change between season. Community structure did, however, vary with depth, which agrees with …
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Modeling photosynthesis and related metabolic processes : from detailed examination to consideration of the metabolic context
… cycle, those suitable for development of metabolic engineering strategies were identified. Driven by the question why starch rather than sucrose is the predominant transitory carbon storage in higher plants, the metabolic costs for their synthesis were examined. The incorporation of the …
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The Effects of Global Change on Avian Biodiversity
… During winter, temperature influences the metabolic costs associated with thermoregulating and therefore food requirements, while snow cover and daylight influence foraging ability. Consequently, food has the potential to mediate the sensitivity of bird populations to winter climate. I …
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Language like behavior in protein secondary structure and analysis of mitochondrial genomes and transposable elements in Antarctic notothenioid fishes
… maintaining the system’s overall functional and metabolic costs. I checked the dependence of length of secondary structure elements against the number of secondary structures in a protein domain in 60 proteomes and observed a negative correlation between the number of secondary structures and …
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The computations of neural circuits underlying flexible cognition and how they come to be
… to optimise performance while minimising metabolic costs. Specifically, the new model reveals potential optimisation mechanisms which jointly shape how the brain’s structure and function develops. Chapter 5 is then applying the principles of co-optimisation observed in the spatially …
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Characteristics of Nitrogen- and Iron-Limited Growth in the Diatom Phaeodactylum tricornutum, and in Natural Phytoplankton Populations.
… conditions of N-limitation due to the extra costs associated with nitrate reductase (NR) and nitrite reductase (NiR) activity. The metabolic costs of growth on nitrate may be significantly increased under iron (Fe)-limitation, as both NR and NiR require Fe. Fe-limited chemostat cultures …
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Changing consumer strength in a changing climate
… Ocean warming and acidification alter the metabolic demands of organisms and the strength at which they interact with each other. The metabolic costs of changing abiotic conditions vary between interacting pairs of species, and as such, their strength of influence on one another may change …
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Foraging ecology of two piscivores in woody habitat and effects of their introduction on lake ecosystems
… efficiency of piscivores, which may influence metabolic costs and therefore piscivore energy balance (as net energy for reproduction and growth is equal to energy consumption minus losses due to excretion, egestion and metabolism). Collectively, my results suggest that coarse woody habitat may …
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Within- and among-individual variation in metabolic rate in juvenile Atlantic salmon, Salmo salar
… relationships between growth performance, metabolic strategies and individual behaviour. Juvenile salmonid fish have been a particularly useful subject for exploring individual variation in metabolism because it has been possible to relate standard metabolic rate (SMR) to behavioural traits …
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Effects of environmental warming on lentic freshwater communities and the behavioral and physiological responses by fishes to warming
… physiological mechanisms, influencing growth and metabolic costs that alter how individuals allocate energetic resources or how predators interact with prey. Some reproductive and life history strategies may be more beneficial in warmer temperatures, such as small body sizes and rapid growth. …