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Hypercarbia

  • REVIEW
    Postnatal development of diving physiology: implications of anthropogenic disturbance for immature marine mammals
    Shawn R. Noren
    Journal of Experimental Biology 2020 223: jeb227736 doi: 10.1242/jeb.227736 Published 11 September 2020

    Summary: Large oxygen reserves and oxygen-conserving mechanisms that support diving are underdeveloped at birth in pinnipeds and cetaceans. This Review explores how underdeveloped physiology makes immature marine mammals vulnerable to disturbance.

  • RESEARCH ARTICLE
    Preferential intracellular pH regulation is a common trait amongst fishes exposed to high environmental CO2
    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
    Journal of Experimental Biology 2020 223: jeb208868 doi: 10.1242/jeb.208868 Published 1 April 2020

    Highlighted Article: Preferential intracellular pH regulation is a common strategy of acid–base regulation in fishes acutely exposed to environmental PCO2 >4 kPa.

  • SHORT COMMUNICATION
    Water pH limits extracellular but not intracellular pH compensation in the CO2-tolerant freshwater fish Pangasianodon hypophthalmus
    Michael A. Sackville, Ryan B. Shartau, Christian Damsgaard, Malthe Hvas, Le My Phuong, Tobias Wang, Mark Bayley, Do Thi Thanh Huong, Nguyen Thanh Phuong, Colin J. Brauner
    Journal of Experimental Biology 2018 221: jeb190413 doi: 10.1242/jeb.190413 Published 28 November 2018

    Summary: Low water pH limits extracellular pH compensation in a CO2-tolerant fish. This may increase selection for a more robust CO2 defence strategy where intracellular pH is preferentially regulated.

  • COMMENTARY
    Preferential intracellular pH regulation: hypotheses and perspectives
    Ryan B. Shartau, Daniel W. Baker, Dane A. Crossley II, Colin J. Brauner
    Journal of Experimental Biology 2016 219: 2235-2244; doi: 10.1242/jeb.126631

    Summary: Preferential intracellular pH regulation confers exceptional tolerance to a severe acute respiratory acidosis. This trait may represent a basal pattern of acid–base regulation used by developing vertebrates that is lost or retained in adults.

  • RESEARCH ARTICLE
    Embryonic common snapping turtles (Chelydra serpentina) preferentially regulate intracellular tissue pH during acid–base challenges
    Ryan B. Shartau, Dane A. Crossley II, Zachary F. Kohl, Colin J. Brauner
    Journal of Experimental Biology 2016 219: 1994-2002; doi: 10.1242/jeb.136119

    Summary: Embryonic turtles preferentially regulate tissue pH in the absence of blood pH regulation during acid–base disturbances. This pattern of acid–base regulation has never been observed before in amniotes.

  • RESEARCH ARTICLE
    Control of lung ventilation following overwintering conditions in bullfrogs, Lithobates catesbeianus
    Joseph M. Santin, Lynn K. Hartzler
    Journal of Experimental Biology 2016 219: 2003-2014; doi: 10.1242/jeb.136259

    Summary: Following ventilatory inactivity during winter submergence, bullfrogs can match breathing to metabolism and increase ventilation during hypoxia, but have reduced responses to hypercarbia when acutely transitioned to a warm-terrestrial environment.

  • RESEARCH ARTICLE
    Interaction of osmoregulatory and acid–base compensation in white sturgeon (Acipenser transmontanus) during exposure to aquatic hypercarbia and elevated salinity
    Ciaran A. Shaughnessy, Dan W. Baker, Colin J. Brauner, John D. Morgan, Jason S. Bystriansky
    Journal of Experimental Biology 2015 218: 2712-2719; doi: 10.1242/jeb.125567

    Summary: Acidosis recovery in hypercapnic sturgeon associates with plasma Na+ accumulation prior to and plasma Cl− removal following osmotic recovery, as osmoregulatory requirements transition from ion uptake to ion excretion throughout seawater acclimation.

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