... dives to great depths, while typically avoiding (or tolerating) hypoxia, hypercarbia, acidosis and decompression sickness (DCS). Over the last few decades, research has revealed that diving physiology is underdeveloped at birth. Here, I review the postnatal development of the body's oxygen stores...

...R. B. Shartau; D. W. Baker; T. S. Harter; D. L. Aboagye; P. J. Allen; A. L. Val; D. A. Crossley; Z. F. Kohl; M. S. Hedrick; C. Damsgaard; C. J. Brauner ABSTRACT Acute (<96 h) exposure to elevated environmental CO 2 (hypercarbia) induces a pH disturbance in fishes that is often compensated...

... with reductions in extracellular pH (pH e) compensation. It is unknown whether these reductions are due to intrinsically lower capacities for pH e compensation, hypercarbia-induced reductions in water pH or other factors. To test how water pH affects capacities and strategies for pH compensation, we exposed...

... costly than coupled pH regulation (Baker and Brauner, 2012) and protects cardiac performance during acute hypercarbia exposure (Baker et al., 2011 ; Hanson et al., 2009 ; Shartau et al., 2016), there may be unquantified long-term costs associated with preferential pH i regulation. This premise remains...

...Ryan B. Shartau; Dane A. Crossley, II; Zachary F. Kohl; Colin J. Brauner ABSTRACT The nests of embryonic turtles naturally experience elevated CO 2 (hypercarbia), which leads to increased blood P CO 2 and a respiratory acidosis, resulting in reduced blood pH [extracellular pH (pH e)]. Some fishes...

... to hypercarbia when acutely transitioned to a warm-terrestrial environment. Temperature acclimation Control of breathing Bullfrog Environmental physiology Hypercarbia Hypoxia Anurans and other ectothermic vertebrates operate over a wide range of body temperatures that depend on time of day...

... prior and continued exposure to hypercarbia (HCSW), and compared with a normocarbic freshwater (NCFW) control. Hypercarbia induced a severe extracellular acidosis (from pH 7.65 to pH 7.2) in HCSW sturgeon, and these fish had a 2-fold greater rise in plasma osmolarity over NCSW by day 2 of SW exposure...

... cardiorespiratory responses to environmental hypercarbia in the air-breathing fish, Hoplerythrinus unitaeniatus (jeju). Fish were exposed to graded hypercarbia (1, 2.5, 5, 10 and 20% CO 2) and also to graded levels of environmental acidosis (pH ~7.0, 6.0, 5.8, 5.6, 5.3 and 4.7) equal to the pH levels...

... and mitochondria-rich cells in the interlamellar region and along the lamellae of the gills. Exposure of rainbow trout to hypercarbia (∼0.8% CO 2) for 24 h resulted in significant increases in tCAc mRNA expression (∼20-fold;quantified by real-time PCR) and protein levels (∼1.3-fold; quantified by western analysis...

...K. M. Gilmour; W. K. Milsom; F. T. Rantin; S. G. Reid; S. F. Perry SUMMARY Experiments were carried out to test the hypothesis that ventilatory and cardiovascular responses to hypercarbia (elevated water P CO2) in the tambaqui Colossoma macropomum are stimulated by externally oriented receptors...

...Steve F. Perry; Stephen G. Reid SUMMARY Experiments were performed to test the hypothesis that the marked ventilatory and cardiovascular responses to hypercarbia in rainbow trout Oncorhynchus mykiss arise from specific stimulation of chemoreceptors localised to the first gill arch...

... relative contributions of CO 2 versus H + in promoting the cardiorespiratory responses of dogfish (Squalus acanthias) and Atlantic salmon (Salmo salar) to hypercarbia and to evaluate the relative contributions of externally versus internally oriented receptors in dogfish. In dogfish, the preferential...

...J. E. Mckendry; W. K. Milsom; S. F. Perry ABSTRACT Adult Pacific spiny dogfish (Squalus acanthias) were exposed to acute (approximately 20 min) hypercarbia while we monitored arterial blood pressure, systemic vascular resistance (R S), cardiac output and frequency (f H) as well as ventilatory...

...-existing vascular tone, CO 2 was without effect on systemic resistance. In contrast, hypercarbia in vivo triggered a statistically significant increase in systemic resistance (approximately 70 %) that was associated with elevated ventral aortic (approximately 42 %) and dorsal aortic (approximately 43...

...Lena Sundin; Stephen G. Reid; F. Tadeu Rantin; William K. Milsom ABSTRACT This study examined the location and physiological roles of branchial chemoreceptors involved in the cardiorespiratory responses to hypoxia and hypercarbia in a neotropical fish that exhibits aquatic surface respiration...