... thermoregulating thorax temperature when compared with moths raised in normoxia or hyperoxia (30% oxygen), when moths were warming up in atmospheres with 21–30% oxygen. In addition, moths raised in hypoxia had lower critical oxygen levels when flying. These results suggest that chronic developmental exposure...

... to start answering questions about developmental plasticity. In this study, we examined the effect of developmental oxygen levels (hypoxia: 10% oxygen, and hyperoxia: 30% oxygen) on the respiratory and metabolic phenotype of adult moths, focusing on morphological and physiological cellular...

... ) and snakes ( Python molurus ) are exposed to hyperoxia. In toads, hyperoxia caused similar elevations of arterial P CO 2 at 20 and 30°C, indicative of a temperature-independent oxygen-mediated drive to breathing, whereas P CO 2 was unaffected by hyperoxia in snakes at 25 and 35°C. These findings do...

... strategies, including phenotypic plasticity, to modify their physiology and behaviour, thus maintaining homeostasis in challenging physical conditions. Hypoxia Hyperoxia Killifish Sculpins Phenotypic plasticity Salinity Natural Sciences and Engineering Research Council of Canada http...

...Tristan J. McArley; Daniel Morgenroth; Lucas A. Zena; Andreas T. Ekström; Erik Sandblom ABSTRACT In fish, maximum O 2 consumption rate ( Ṁ O 2 ,max ) and aerobic scope can be expanded following exhaustive exercise in hyperoxia; however, the mechanisms explaining this are yet to be identified. Here...

... of temperature and oxygen concentrations. Hyperoxia did not extend upper thermal limits, nor did it prevent the loss of size or fertility experienced near upper chronic thermal limits. At moderate temperatures, the TSR pattern was observed under conditions of hyperoxia, normoxia and hypoxia, suggesting little...

... focused on measuring short-term performance responses in animals under acute exposure to critical thermal maximums. The OCLTT hypothesis, however, emphasises the importance of sustained animal performance over acute tolerance. The present study tested the effect of chronic hypoxia and hyperoxia during...

... in the elasmobranch S qualus suckleyi . Hypoxia and hyperoxia had little effect on heart rate but did alter breathing frequency and amplitude. Atropine yielded an overall tachycardia in all oxygen conditions and abolished all heart rate variability (HRV), suggesting that HRV solely reflects fluctuating vagal tonus...

.../ Summary: The avian yolk bears the burden of an elevated oxidative challenge, without the embryo having to compromise its endogenous antioxidant supply or suffer oxidative damage itself. Antioxidant Hyperoxia Lipid peroxidation Oxidative stress Prenatal development Vitamin E...

... in the amphibious Kryptolebias marmoratus on land is driven by higher O 2 availability in atmospheric air, and the alternative hypothesis that remodeling is induced by a different environmental or physiological condition that fish experience on land. Fish were acclimated to 28 days of air, or to aquatic hyperoxia...

... applied to the blocks. Each block included the normoxic (20.9% O 2 ) control and one of the P O 2  manipulations (hyperoxia/hypoxia), because we had only two chambers where P O 2  manipulation was possible. Plywood chambers (56×48×14 cm) with Plexiglas lids were used for manipulating P O 2...

... values indicate an inverse relationship between blood pressure and ventilation (or breathing frequency), i.e. as blood pressure increases, ventilation decreases, and vice versa], while temperature had no effect on these sensitivities. Hyperoxia (30%; 25°C) diminished ventilation, but did not abolish...

... of endogenous NO production using l -NAME suppressed the hypoventilatory response to hyperoxia, supporting an inhibitory role of NO in adult zebrafish. Neuroepithelial cells (NECs), the putative oxygen chemoreceptors of fish, contain neuronal nitric oxide synthase (nNOS). In zebrafish larvae at 4 days post...

... ectotherms. However, few studies have directly investigated the dependence of thermal limits on oxygen transport capacity. By manipulating oxygen availability (via environmental hyperoxia) and blood oxygen carrying capacity (via experimentally induced anaemia) in European perch ( Perca fluviatilis Linneaus...

... 9 2013 15 7 2014 © 2014. Published by The Company of Biologists Ltd 2014 Dragonfly Flight Hyperoxia Hypoxia Insect Respirometry Why are insects so small compared with vertebrates? Several possible explanations have been proposed. Smaller body sizes may be adaptive...

... approximately 300 cells per larva at 3 days post-fertilisation (d.p.f.) to ~120 cells at 7 d.p.f., and were rarely observed in adults. Acclimation to hypoxia (30 mmHg) or hyperoxia (300 mmHg) resulted in delayed or accelerated development, respectively, of peak resting ventilatory frequency and produced changes...

..., suggesting that this is not a common mechanism coupling upper and lower limits in terrestrial arthropods. * Author for correspondence ( [email protected] ) 18 3 2010 © 2010. 2010 CT max CT min hyperoxia hypoxia Ectotherms challenged by heat or cold reach limits...

... thereafter. After 22 h,CO 2 production from the food was measured and subtracted from the output. Hyperoxia measurements were conducted under conditions similar to the hypoxic experiment except that flies were supplied with a small amount of sterile food. To avoid the potential confounding effect...

...Tomasz Owerkowicz; Ruth M. Elsey; James W. Hicks SUMMARY Recent palaeoatmospheric models suggest large-scale fluctuations in ambient oxygen level over the past 550 million years. To better understand how global hypoxia and hyperoxia might have affected the growth and physiology of contemporary...

...,metallothionein (MT) and CYP1A, were examined with real-time quantitative (q)RT-PCR in hepatic tissue of Atlantic cod exposed to 46% (hypoxia), 76%(normoxia) and 145% (hyperoxia) O 2 saturation (tank outlet). To evaluate the oxidative stress state, the levels of total glutathione (tGSH),reduced glutathione (GSH...