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Gas exchange

  • COMMENTARY
    Improving estimates of diving lung volume in air-breathing marine vertebrates
    Andreas Fahlman, Katsufumi Sato, Patrick Miller
    Journal of Experimental Biology 2020 223: jeb216846 doi: 10.1242/jeb.216846 Published 25 June 2020

    Summary: Various factors affect our ability to accurately determine lung capacity during diving in air-breathing marine vertebrates; improving our estimates has implications for our understanding of the physiology and ecophysiology of these animals.

  • RESEARCH ARTICLE
    The mechanics of air breathing in gray tree frog tadpoles, Hyla versicolor (Anura: Hylidae)
    Jackson R. Phillips, Amanda E. Hewes, Kurt Schwenk
    Journal of Experimental Biology 2020 223: jeb219311 doi: 10.1242/jeb.219311 Published 5 March 2020

    Summary: Tadpoles suck bubbles from the water's surface to breathe air, but gray tree frog tadpoles suck two bubbles. Double bubble-sucking prevents mixing of expired and inspired airstreams, increasing respiratory efficiency.

  • RESEARCH ARTICLE
    Do squid breathe through their skin?
    Matthew A. Birk, Agnieszka K. Dymowska, Brad A. Seibel
    Journal of Experimental Biology 2018 221: jeb185553 doi: 10.1242/jeb.185553 Published 5 October 2018

    Summary: Contrary to a 30-year-old well-regarded hypothesis, squid do not obtain oxygen across their skin to supply underlying tissues.

  • METHODS & TECHNIQUES
    Short-duration respirometry underestimates metabolic rate for discontinuous breathers
    Hugh S. Winwood-Smith, Craig R. White
    Journal of Experimental Biology 2018 221: jeb175752 doi: 10.1242/jeb.175752 Published 25 July 2018

    Summary: Calculation of the respiratory exchange ratio from rates of both oxygen uptake and carbon dioxide emission avoids underestimation of metabolic rate in discontinuous breathers.

  • RESEARCH ARTICLE
    X-ray computed tomography study of the flight-adapted tracheal system in the blowfly Calliphora vicina, analysing the ventilation mechanism and flow-directing valves
    Lutz Thilo Wasserthal, Peter Cloetens, Rainer H. Fink, Lennard Knut Wasserthal
    Journal of Experimental Biology 2018 221: jeb176024 doi: 10.1242/jeb.176024 Published 21 June 2018

    Summary: Tracheal ventilation in blowflies is driven by the flight muscles, deforming the mesonotal air sacs, which results in a unidirectional airflow channelled by two antagonistically working passive valves.

  • SHORT COMMUNICATION
    Right-to-left shunt has modest effects on CO2 delivery to the gut during digestion, but compromises oxygen delivery
    Christian Lind Malte, Hans Malte, Lærke Rønlev Reinholdt, Anders Findsen, James W. Hicks, Tobias Wang
    Journal of Experimental Biology 2017 220: 531-536; doi: 10.1242/jeb.149625

    Summary: Shunting in reptiles is ineffective for regulating gastric CO2 supply but effectively reduces blood O2 levels.

  • RESEARCH ARTICLE
    The long road to steady state in gas exchange: metabolic and ventilatory responses to hypercapnia and hypoxia in Cuvier's dwarf caiman
    Christian Lind Malte, Hans Malte, Tobias Wang
    Journal of Experimental Biology 2016 219: 3810-3821; doi: 10.1242/jeb.143537

    Summary: Attainment of a steady state in gas exchange upon and following hypoxia and hypercapnia in reptiles may take a prolonged time, especially if blood flow and ventilation rates are low.

  • RESEARCH ARTICLE
    Gas exchange and dive characteristics of the free-swimming backswimmer Anisops deanei
    Karl K. Jones, Edward P. Snelling, Amy P. Watson, Roger S. Seymour
    Journal of Experimental Biology 2015 218: 3478-3486; doi: 10.1242/jeb.125047

    Highlighted Article: Exotic gas experiments and mathematical modelling show that backswimmers extend dive duration by extracting 20% of their O2 directly from the water.

  • RESEARCH ARTICLE
    Flight-motor-driven respiratory airflow increases tracheal oxygen to nearly atmospheric level in blowflies (Calliphora vicina)
    Lutz T. Wasserthal
    Journal of Experimental Biology 2015 218: 2201-2210; doi: 10.1242/jeb.121061

    Highlighted Article: Blowflies increase their tracheal oxygen concentration during flight above the resting level by a unidirectional autoventilatory airflow.

  • SHORT COMMUNICATION
    Interruption to cutaneous gas exchange is not a likely mechanism of WNS-associated death in bats
    Charleve S. Carey, Justin G. Boyles
    Journal of Experimental Biology 2015 218: 1986-1989; doi: 10.1242/jeb.118950

    Summary: White-nose syndrome is unlikely to cause death in hibernating bats by interfering with passive gas exchange across wing surfaces.

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