... Summary: Cardiac taurine deficiency impairs heart function in brook char and alters whole-animal sensitivity to thermal, hypoxic and exercise stress. β-Alanine Heart rate Critical thermal maximum Hypoxic bradycardia Isolated perfused heart Regulatory volume decrease Osmorespiratory compromise...

... different combinations of these traits to maintain similar metabolic rates and hypoxia tolerance. Teleost Osmorespiratory compromise Ionoregulation Aerobic metabolism Exercise Hypoxia Natural Sciences and Engineering Research Council of Canada http://dx.doi.org/10.13039/501100000038...

... [HCO 3 − ]. Aerial hypoxia (15.3 kPa) and aerial hyperoxia (>40.9 kPa) had no effects on UFR, but both inhibited branchial Na + influx, revealing novel aspects of the osmorespiratory compromise. Aquatic hypoxia (4.1 kPa), but not aquatic hyperoxia (>40.9 kPa), inhibited gill Na + influx, UFR...

... increase during exercise, in accord with the traditional concept of the osmorespiratory compromise. The Efflux experiment refers to trials in which the fish were caudally injected with [ 3 H]PEG-4000, and branchial and renal effluxes of [ 3 H]PEG-4000 were monitored, whereas Influx experiments were...

... ( sfperry@uottawa.ca ) 26 7 2010 © 2010. 2010 gill Rh proteins interlamellar cell mass osmorespiratory compromise nitrogen metabolism Ammonia excretion in fish occurs predominantly at the gill with only a minor fraction (<10%) being excreted by the kidney ( Maetz, 1972...

... promoting adjustments in gill morphology, also will influence a suite of other thermally dependent variables including metabolic rate, cardiac output and ventilation. Such changes are also likely to affect the osmorespiratory compromise. For example,increases in cardiac output and ventilation in warmer...

... hypoxia,which may be indicative of cell damage or muscle depolarization, however,further studies are required to investigate this. The concept of the osmorespiratory compromise was originally developed to describe the trade-off between gas exchange and ionoregulatory requirements during exercise in fish...

...Richard J. Gonzalez; D. G. Mcdonald ABSTRACT An increase in the functional surface area (FSA) of the gills of freshwater fish facilitates increased oxygen consumption but also increases ion loss across the gills - a phenomenon that has been termed the osmorespiratory compromise. This study...