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Thermal Tolerance And Physiology Of Eleutherodactylus Coqui Along An Elevational Gradient In Hawai‘I, Karen H. Beard, Susannah S. French, Jack Marchetti
Thermal Tolerance And Physiology Of Eleutherodactylus Coqui Along An Elevational Gradient In Hawai‘I, Karen H. Beard, Susannah S. French, Jack Marchetti
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The purpose of this study was to determine if the thermal tolerance and physiology of the coqui frog changed along HawaiÔiÕs elevation gradient. A short acclimation experiment was used to test the baseline thermal tolerance and physiology, and an extended acclimation experiment to test the acclimation ability of the thermal tolerance and physiology metrics of the coqui frogs collected from low (m), medium (350-550 m) and high elevations (>750 m).
Elevation Influences The Microhabitat Use And Baseline Physiology Of Coqui Frogs In Hawai‘I, Karen H. Beard, Susannah S. French, Jack Marchetti
Elevation Influences The Microhabitat Use And Baseline Physiology Of Coqui Frogs In Hawai‘I, Karen H. Beard, Susannah S. French, Jack Marchetti
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The purpose of this study was to determine whether elevation in HawaiÔi affects the coquiÕs microhabitat use such as substrate choice and height off the forest floor and physiological metrics such as osmolality, oxidative status, and energy metabolites (glucose, free glycerol, and triglycerides).
Blood Chemistry And Biliverdin Differ According To Reproduction And Tourism In A Free-Living Lizard, Susannah French
Blood Chemistry And Biliverdin Differ According To Reproduction And Tourism In A Free-Living Lizard, Susannah French
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Changes in the physiological health of species are an essential indicator of changing conditions and environmental challenges. Reponses to environmental challenges can often induce stress, influence physiology, and change metabolism in organisms. Here we tested blood chemistry parameters indicative of stress and metabolic activity using an i-STAT point-of-care blood analyzer in seven populations of free-ranging rock iguanas exposed to varying levels of tourism and supplemental feeding. We found significant differences in blood chemistry (glucose, oxygen, carbon dioxide, hematocrit, hemoglobin, calcium, potassium, and biliverdin levels) among populations exposed to varying levels of tourism, and also some variation between sexes and reproductive …
Data From: Complex Tourism And Season Interactions Contribute To Disparate Physiologies In An Endangered Rock Iguana, Susannah French
Data From: Complex Tourism And Season Interactions Contribute To Disparate Physiologies In An Endangered Rock Iguana, Susannah French
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To promote survival and fitness, organisms use a suite of physiological systems to respond to both predictable and unpredictable changes in the environment. These physiological responses are also influenced by changes in life history state. The continued activation of physiological systems stemming from persistent environmental perturbations enable animals to cope with these challenges but may over time lead to significant effects on the health of wildlife. In the present study, we tested how varying environmental perturbations driven by tourism and associated supplemental feeding affects the energetics, corticosterone and immunity of six discrete populations of the northern Bahamian rock iguana (Cyclura …
Data From: Glucose Tolerance Of Iguanas Is Affected By High Sugar Diets In The Lab And Supplemental Feeding By Ecotourists In The Wild, Susannah S. French
Data From: Glucose Tolerance Of Iguanas Is Affected By High Sugar Diets In The Lab And Supplemental Feeding By Ecotourists In The Wild, Susannah S. French
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Physiological responses to both natural and anthropogenic perturbations involve changes in glucose use and metabolism to enable animals to respond to challenges. The responses are at least partially mediated via the glucocorticoids, and the proper functioning of these systems are critical to animal health. Prolonged high-sugar diets in humans can compromise physiological functions and lead to a range of diseases including diabetes. Such outcomes are less common in natural, non-human systems, likely because of evolutionarily based balances between sugar intake and the ability to process it. Due to both landscape changes and human feeding of wildlife, the introduction of unnatural …