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specific dynamic action

  • RESEARCH ARTICLE
    An appetite for invasion: digestive physiology, thermal performance and food intake in lionfish (Pterois spp.)
    S. Clay Steell, Travis E. Van Leeuwen, Jacob W. Brownscombe, Steven J. Cooke, Erika J. Eliason
    Journal of Experimental Biology 2019 222: jeb209437 doi: 10.1242/jeb.209437 Published 10 October 2019

    Editors' Choice: The relationship between digestive physiology and energetic physiology may play an important role in invasive species' success, demonstrated in invasive lionfish (Pterois spp.) in the context of a warming ocean.

  • RESEARCH ARTICLE
    Environmental temperature alters the overall digestive energetics and differentially affects dietary protein and lipid use in a lizard
    Melissa Plasman, Marshall D. McCue, Víctor Hugo Reynoso, John S. Terblanche, Susana Clusella-Trullas
    Journal of Experimental Biology 2019 222: jeb194480 doi: 10.1242/jeb.194480 Published 18 March 2019

    Summary: Temperature alters the class of nutrients oxidized and assimilated, and the amount of energy spent for processing a meal in an ectotherm.

  • SHORT COMMUNICATION
    Metabolic fuel use after feeding in the zebrafish (Danio rerio): a respirometric analysis
    Marcio S. Ferreira, Chris M. Wood, Till S. Harter, Giorgi Dal Pont, Adalberto L. Val, Philip G. D. Matthews
    Journal of Experimental Biology 2019 222: jeb194217 doi: 10.1242/jeb.194217 Published 21 February 2019

    Summary: In zebrafish, carbohydrate and lipid were the major fuels during fasting, but carbohydrate oxidation increased immediately after feeding, while protein usage predominated at later times.

  • RESEARCH ARTICLE
    The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
    Rodrigo S. B. Gavira, Marina R. Sartori, Manuel N. Gontero-Fourcade, Bruna F. Gomes, Augusto S. Abe, Denis V. Andrade
    Journal of Experimental Biology 2018 221: jeb176156 doi: 10.1242/jeb.176156 Published 19 April 2018

    Summary: Long-term fasting of tegu lizards during seasonal dormancy imposes extra digestion costs for GI tract regrowth post-dormancy but this is negligible compared with the overall energetic savings from GI tract atrophy.

  • RESEARCH ARTICLE
    Economic thermoregulatory response explains mismatch between thermal physiology and behaviour in newts
    Lumír Gvoždík, Peter Kristín
    Journal of Experimental Biology 2017 220: 1106-1111; doi: 10.1242/jeb.145573

    Summary: Digesting newts prefer body temperatures that are optimal for aerobic scope not in absolute terms but relative to the minimum oxygen consumption.

  • SHORT COMMUNICATION
    Plasticity of immunity in response to eating
    Rachel L. Luoma, Michael W. Butler, Zachary R. Stahlschmidt
    Journal of Experimental Biology 2016 219: 1965-1968; doi: 10.1242/jeb.138123

    Summary: Aspects of immunity can increase nearly 50% during digestion of a meal in snakes; thus, immune up-regulation may contribute to the energetic cost of digestion (specific dynamic action, SDA).

  • RESEARCH ARTICLE
    Eating increases oxidative damage in a reptile
    Michael W. Butler, Thomas J. Lutz, H. Bobby Fokidis, Zachary R. Stahlschmidt
    Journal of Experimental Biology 2016 219: 1969-1973; doi: 10.1242/jeb.138875

    Summary: Consuming and digesting a meal affects oxidative physiology to a surprising degree, and animals that consume large or meat-based meals may be particularly susceptible to increases in oxidative damage.

  • RESEARCH ARTICLE
    The speed and metabolic cost of digesting a blood meal depends on temperature in a major disease vector
    Marshall D. McCue, Leigh Boardman, Susana Clusella-Trullas, Elsje Kleynhans, John S. Terblanche
    Journal of Experimental Biology 2016 219: 1893-1902; doi: 10.1242/jeb.138669

    Summary: Respirometry reveals that higher environmental temperatures reduce the metabolic costs of digestion but hasten starvation, and behavioral measurements show that tsetse flies switch between thermal optima throughout feeding cycles.

  • RESEARCH ARTICLE
    Digesting pythons quickly oxidize the proteins in their meals and save the lipids for later
    Marshall D. McCue, R. Marena Guzman, Celeste A. Passement
    Journal of Experimental Biology 2015 218: 2089-2096; doi: 10.1242/jeb.118349

    Summary: Isotopes recovered from the exhaled CO2 of pythons fed on protein- and lipid-labeled mice indicate how and when the snakes oxidize the different types of metabolic fuels in their diet. This novel approach could be used on virtually any air-breathing animal.

  • RESEARCH ARTICLE
    The cost of digestion in the fish-eating myotis (Myotis vivesi)
    Kenneth C. Welch, Jr, Aída Otálora-Ardila, L. Gerardo Herrera M., José Juan Flores-Martínez
    Journal of Experimental Biology 2015 218: 1180-1187; doi: 10.1242/jeb.115964

    Highlighted article: With a short digestive tract and high metabolic demand, the fish-eating myotis faces confounding digestive challenges. It meets these demands with an unusually energetically intense digestive response.

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