.... Insects survive desiccating conditions by reducing water loss, increasing their total amount of water (and replenishing it) and increasing their tolerance of dehydration. The physiology underlying these traits is reasonably well understood, as are the sources of variation and phenotypic plasticity...

... after the first 24 h of the experiment. Additionally, we observed significant mass loss that is probably due to dehydration-associated anorexia a response to limit fluid loss by reducing waste and the solute load as well as allowing water reabsorption from the kidneys and gastrointestinal tract. Finally...

... periods are potentially problematic when investigating thermoregulation at T air > T b . First, rates of EWL increase rapidly at T air > T b and create a risk of lethal dehydration; in small passerines, rates of EWL at T air approaching 50°C may reach values equivalent to 7% of body mass...

... plasma osmolality (dehydration). Mass gain from drinking after the treatment period was higher in vipers from the heatwave and water-deprived group, suggesting that thirst was synergistically influenced by thermal and water constraints. Heatwave conditions and water deprivation also additively increased...

.... Oligosoma Dehydration Dry-skinned ectotherm Optimality model Behavioural thermoregulation University of Otago http://dx.doi.org/10.13039/100008247 Our study provides the first detailed analysis of thermoregulatory changes in a lizard in response to wind. Under laboratory conditions...

.... ‘hydrated’ and ‘dehydrated’; see ‘Description of treatments’, above), regardless of what value of plasma osmolality we obtained from the blood samples. This method enabled us to compare the results obtained from an information-theoretic criterion (AIC) with those based on a null hypothesis testing approach...

... freshwater amphibious species. All three species have relatively small and similar thresholds of dehydration (TH, approximately −4% loss of body mass) that elicit thirst and drinking of fresh water. These species have higher thirst sensitivity than several species of hydrophiine and laticaudine sea snakes...

... ). Smaller mammals also have a greater mass-specific metabolic rate, and hence metabolic heat production per gram of tissue, and a greater mass-specific rate of evaporation required to maintain homeothermy ( Fig. 4 ). Consequently, dissipating heat by evaporative cooling results in more rapid dehydration...

...Daniel E. Zajic; Jonathon P. Nicholson; Jason E. Podrabsky ABSTRACT Annual killifish survive in temporary ponds by producing drought-tolerant embryos that can enter metabolic dormancy (diapause). Survival of dehydration stress is achieved through severe reduction of evaporative water loss. We...

... will tolerate greater dehydration before drinking than will mainland snakes. (3) Insular snakes will avoid drinking seawater more strongly than will those from the mainland. Between 2001 and 2018, we quantitatively estimated the hydration status of 337 individual cottonmouth snakes from insular populations...

... during sloughing in L . caerulea . During active periods across all species, water loss rates were on average 232% higher in Bd infected frogs than in uninfected frogs. This indicates that dehydration stress may be a significant factor contributing to the morbidity of severely Bd infected anurans...

...Harvey B. Lillywhite ABSTRACT An important question related to the survival of dehydrating animals is whether feeding provides a net gain of water – contributing postprandial free water and metabolic water – or, alternatively, whether digestion and assimilation of ingested food incur a net loss...

...Karla T. Moeller; Guillaume Demare; Scott Davies; Dale F. DeNardo ABSTRACT The physiological challenges associated with dehydration can induce an increase in plasma glucocorticoid concentrations, a response thought to provide the mechanism for dehydration suppressing immune function. However...

... ( Vipera aspis ), a species naturally exposed to periods of water and food deprivation. We predicted a cumulative effect of pregnancy and dehydration on oxidative stress levels. Our results support the occurrence of an oxidative cost of reproduction as we found higher oxidative damage levels in pregnant...

... osmolality and baseline CORT levels. Together, our results suggest that dehydration increases maternal CORT levels, which may subsequently influence offspring development. Further long-term field studies are therefore required to assess whether there is an adaptive significance of this response...

... of the physiological interactions between pathogen and host. Pseudogymnoascus destructans severely damages wings and tail membranes, by causing dryness that leads to whole sections crumbling off. Four possible mechanisms have been proposed by which infection could lead to dehydration; in this study, we tested one: P...

.... Competing interests The authors declare no competing financial interests. 30 6 2014 2 11 2014 © 2014. Published by The Company of Biologists Ltd 2014 Marine reptile [ 2 H]deuterium Dehydration Osmoregulation Homeostasis Overwinter Water flux Salt accumulation...

... below −30°C. Also, some of these microarthropods are capable of cryoprotective dehydration to extend their supercooling capacity and reduce the risk of freezing. In contrast, the two best-studied Antarctic insects, the midges Belgica antarctica and Eretmoptera murphyi , are freeze-tolerant year-round...

... ureogenic and ureotelic in water, P. sinensis adopted a reduction in ammonia production, instead of increased urea synthesis, as the major strategy to ameliorate ammonia toxicity and problems associated with dehydration during terrestrial exposure. Some reptiles exhibit special adaptations to minimize...

... levels of dehydration. Gila monsters could not maintain water balance over long time scales through meal consumption alone. Animals fed a single meal took no longer to dehydrate than controls when both groups were deprived of free water. Additionally, meal consumption imparts an acute short-term hydric...