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respirometry

  • RESEARCH ARTICLE
    Acidification and hypoxia interactively affect metabolism in embryos, but not larvae, of the coastal forage fish Menidia menidia
    T. G. Schwemmer, H. Baumann, C. S. Murray, A. I. Molina, J. A. Nye
    Journal of Experimental Biology 2020 223: jeb228015 doi: 10.1242/jeb.228015 Published 19 November 2020

    Summary: Atlantic silverside embryos and larvae were metabolically resistant to seawater acidification in a series of laboratory experiments. Elevated carbon dioxide only affected embryos through the relationship between metabolism and oxygen.

  • RESEARCH ARTICLE
    Does control of insensible evaporative water loss by two species of mesic parrot have a thermoregulatory role?
    Christine Elizabeth Cooper, Philip Carew Withers, Gerhard Körtner, Fritz Geiser
    Journal of Experimental Biology 2020 223: jeb229930 doi: 10.1242/jeb.229930 Published 1 October 2020

    Summary: Mesic parrots control their insensible evaporative water loss at varying ambient relative humidities to the same extent as an arid parrot, suggesting a thermoregulatory role.

  • RESEARCH ARTICLE
    Oxygen consumption of drift-feeding rainbow trout: the energetic tradeoff between locomotion and feeding in flow
    Jacob L. Johansen, Otar Akanyeti, James C. Liao
    Journal of Experimental Biology 2020 223: jeb220962 doi: 10.1242/jeb.220962 Published 26 June 2020

    Editors' Choice: Drift-feeding rainbow trout choose between swimming and refuging depending on the cost and success rate of prey capture across flow velocities.

  • RESEARCH ARTICLE
    Swimming in unsteady water flows: is turning in a changing flow an energetically expensive endeavor for fish?
    Mathias Schakmann, John F. Steffensen, Peter G. Bushnell, Keith E. Korsmeyer
    Journal of Experimental Biology 2020 223: jeb212795 doi: 10.1242/jeb.212795 Published 18 March 2020

    Summary: The measurement of the costs of swimming in wave-surge type flows revealed minimal costs for acceleration but large costs for turning in a pectoral-fin swimming reef fish.

  • RESEARCH ARTICLE
    Interspecific variation in hypoxia tolerance and hypoxia acclimation responses in killifish from the family Fundulidae
    Brittney G. Borowiec, Ryan D. Hoffman, Chelsea D. Hess, Fernando Galvez, Graham R. Scott
    Journal of Experimental Biology 2020 223: jeb209692 doi: 10.1242/jeb.209692 Published 20 February 2020

    Summary: Substantial interspecific variation and plasticity of hypoxia tolerance exist across fundulid killifish and are only fully appreciated by considering multiple indices of tolerance.

  • 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
    Finding the peak of dynamic oxygen uptake during fatiguing exercise in fish
    Yangfan Zhang, Matthew J. H. Gilbert, Anthony P. Farrell
    Journal of Experimental Biology 2019 222: jeb196568 doi: 10.1242/jeb.196568 Published 25 June 2019

    Summary: Accurately estimating peak oxygen uptake as a fish approaches fatigue in a swimming test must account for oxygen uptake being dynamic despite a constant, imposed workload.

  • SHORT COMMUNICATION
    Turtles maintain mitochondrial integrity but reduce mitochondrial respiratory capacity in the heart after cold acclimation and anoxia
    Amanda Bundgaard, Klaus Qvortrup, Lene Juel Rasmussen, Angela Fago
    Journal of Experimental Biology 2019 222: jeb200410 doi: 10.1242/jeb.200410 Published 10 June 2019

    Summary: Inhibition of mitochondrial respiration rate and production of reactive oxygen species during cold acclimation and anoxia, while preserving mitochondrial content and morphology, is central to the anoxia tolerance of freshwater turtle hearts.

  • RESEARCH ARTICLE
    Energetics and behavior of coral reef fishes during oscillatory swimming in a simulated wave surge
    Travis M. Marcoux, Keith E. Korsmeyer
    Journal of Experimental Biology 2019 222: jeb191791 doi: 10.1242/jeb.191791 Published 27 February 2019

    Summary: The relationship between swimming mode, turning behavior and energetic costs in coral reef fishes is examined for station-hold swimming in wave-induced water motions.

  • RESEARCH ARTICLE
    Distinct metabolic adjustments arise from acclimation to constant hypoxia and intermittent hypoxia in estuarine killifish (Fundulus heteroclitus)
    Brittney G. Borowiec, Grant B. McClelland, Bernard B. Rees, Graham R. Scott
    Journal of Experimental Biology 2018 221: jeb190900 doi: 10.1242/jeb.190900 Published 5 December 2018

    Summary: Fish acclimated to constant hypoxia induced metabolic depression, whereas fish acclimated to intermittent hypoxia maintained routine O2 demands, suggesting that distinct physiological mechanisms can be used to cope with different patterns of hypoxia exposure.

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