... regulation has been identified in several adult fish species and an aquatic amphibian, but never in adult amniotes. Recently, common snapping turtles were observed to preferentially regulate pH i during development; the pattern of acid–base regulation in these species shifts from preferential pH i regulation...

... preferentially regulate tissue pH [intracellular pH (pH i )] against changes in pH e ; this has been proposed to be associated with exceptional CO 2 tolerance and has never been identified in amniotes. As embryonic turtles may be CO 2 tolerant based on nesting strategy, we hypothesized that they preferentially...