Preferential Intracellular pH Regulation is a Common Trait Amongst Fishes Exposed to High Environmental CO2

This week, Lab.Equipment has curated a new Bio article published from Journal of Experimental Biology:

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, and C. J. Brauner

Acute (<96 h) exposure to elevated environmental CO₂ (hypercarbia) induces a pH disturbance in fishes that is often compensated by concurrent recovery of intracellular and extracellular pH (pH_i and pH_e, respectively; coupled pH regulation). However, coupled pH regulation may be limited at CO₂ partial pressure (P_CO2) tensions far below levels that some fishes naturally encounter. Previously, four hypercarbia-tolerant fishes had been shown to completely and rapidly regulate heart, brain, liver and white muscle pH_i during acute exposure to >4 kPa P_CO2 (preferential pH_i regulation) before pH_e compensation was observed. Here, we test the hypothesis that preferential pH_i reg... View the whole article at the Journal of Experimental Biology (JEB) Blog.

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