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critical oxygen tension

  • COMMENTARY
    The utility and determination of Pcrit in fishes
    Gordon R. Ultsch, Matthew D. Regan
    Journal of Experimental Biology 2019 222: jeb203646 doi: 10.1242/jeb.203646 Published 13 November 2019

    Summary: We outline why Pcrit is a useful and informative comparator of hypoxia tolerance in fishes, provided it is determined using standardized respirometry methods and sound statistical approaches.

  • METHODS & TECHNIQUES
    Standardizing the determination and interpretation of Pcrit in fishes
    Jessica E. Reemeyer, Bernard B. Rees
    Journal of Experimental Biology 2019 222: jeb210633 doi: 10.1242/jeb.210633 Published 26 September 2019

    Summary: Methods to determine the oxygen level that limits aerobic metabolism by fishes were evaluated, resulting in specific recommendations for future research.

  • COMMENTARY
    The fallacy of the Pcrit – are there more useful alternatives?
    Chris M. Wood
    Journal of Experimental Biology 2018 221: jeb163717 doi: 10.1242/jeb.163717 Published 12 November 2018

    Summary: This Commentary argues that the concept of the critical oxygen tension in water-breathers is fundamentally flawed for many reasons, and it presents the case for more useful alternatives.

  • RESEARCH ARTICLE
    Emersion behaviour underlies variation in gill morphology and aquatic respiratory function in the amphibious fish Kryptolebias marmoratus
    A. J. Turko, A. Tatarenkov, S. Currie, R. L. Earley, A. Platek, D. S. Taylor, P. A. Wright
    Journal of Experimental Biology 2018 221: jeb168039 doi: 10.1242/jeb.168039 Published 13 April 2018

    Summary: Amphibious fishes may respond to hypoxic water by escaping and breathing air, rather than improving aquatic respiratory function, in contrast to typical water-breathing species.

  • RESEARCH ARTICLE
    Calorespirometry reveals that goldfish prioritize aerobic metabolism over metabolic rate depression in all but near-anoxic environments
    Matthew D. Regan, Ivan S. Gill, Jeffrey G. Richards
    Journal of Experimental Biology 2017 220: 564-572; doi: 10.1242/jeb.145169

    Summary: Although the goldfish's anoxia tolerance results from conserved energy via metabolic depression, its hypoxia tolerance results from exceptional O2 extraction abilities capable of supporting routine metabolic rate even in severe hypoxia.

  • RESEARCH ARTICLE
    Oxygen dependence of upper thermal limits in fishes
    Rasmus Ern, Tommy Norin, A. Kurt Gamperl, Andrew J. Esbaugh
    Journal of Experimental Biology 2016 219: 3376-3383; doi: 10.1242/jeb.143495

    Summary: A novel metric (PCTmax) is presented for assessing the oxygen sensitivity of upper thermal limits in water-breathing ectotherms based on measurements of critical thermal maxima in marine fishes under hypoxia.

  • RESEARCH ARTICLE
    Warm acclimation improves hypoxia tolerance in Fundulus heteroclitus
    Tara L. McBryan, Timothy M. Healy, Kristen L. Haakons, Patricia M. Schulte
    Journal of Experimental Biology 2016 219: 474-484; doi: 10.1242/jeb.133413

    Highlighted Article: Acclimating fish to warm temperatures causes a decrease in the size of an interlamellar cell mass, increasing gill surface area and improving hypoxia tolerance.

  • RESEARCH ARTICLES
    Air breathing in the Arctic: influence of temperature, hypoxia, activity and restricted air access on respiratory physiology of the Alaska blackfish Dallia pectoralis
    Sjannie Lefevre, Christian Damsgaard, Desirae R. Pascale, Göran E. Nilsson, Jonathan A. W. Stecyk
    Journal of Experimental Biology 2014 217: 4387-4398; doi: 10.1242/jeb.105023
  • RESEARCH ARTICLES
    Interactions between hypoxia tolerance and food deprivation in Amazonian oscars, Astronotus ocellatus
    Gudrun De Boeck, Chris M. Wood, Fathima I. Iftikar, Victoria Matey, Graham R. Scott, Katherine A. Sloman, Maria de Nazaré Paula da Silva, Vera M. F. Almeida-Val, Adalberto L. Val
    Journal of Experimental Biology 2013 216: 4590-4600; doi: 10.1242/jeb.082891

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