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metabolism

  • RESEARCH ARTICLE
    Monoterpenes alter TAR1-driven physiology in Drosophila species
    Luca Finetti, Lasse Tiedemann, Xiaoying Zhang, Stefano Civolani, Giovanni Bernacchia, Thomas Roeder
    Journal of Experimental Biology 2021 224: jeb232116 doi: 10.1242/jeb.232116 Published 7 January 2021

    Summary: In Drosophila, monoterpenes not only act as biopesticides but also cause complex tyramine receptor 1 (TAR1)-dependent changes in behaviour and metabolism.

  • RESEARCH ARTICLE
    Phylogenetic analysis of maximal oxygen consumption during exercise (V̇O2,max) and ecological correlates among lizard species
    Ralph L. Albuquerque, Theodore Garland, Jr
    Journal of Experimental Biology 2020 223: jeb229013 doi: 10.1242/jeb.229013 Published 23 December 2020

    Summary: Among species of lizards, helodermatids, varanids and skinks (which are mainly active foragers) have relatively high maximal aerobic capacity during forced exercise (V̇O2,maxV̇O2,max), whereas viviparous species have relatively low V̇O2,maxV̇O2,max.

  • RESEARCH ARTICLE
    Different amplitudes of temperature fluctuation induce distinct transcriptomic and metabolomic responses in the dung beetle Phanaeus vindex
    Kimberly S. Sheldon, Mojgan Padash, Amanda W. Carter, Katie E. Marshall
    Journal of Experimental Biology 2020 223: jeb233239 doi: 10.1242/jeb.233239 Published 9 December 2020

    Highlighted Article: Dung beetles respond to temperature fluctuations in different ways depending on the amplitude of fluctuation. However, any temperature fluctuation increased transcripts associated with open chromatin structure relative to constant temperatures.

  • RESEARCH ARTICLE
    Manipulating plasma thyroid hormone levels at hatching alters development of endothermy and ventilation in Pekin duck (Anas platyrhynchos domestica)
    Tushar S. Sirsat, Edward M. Dzialowski
    Journal of Experimental Biology 2020 223: jeb237701 doi: 10.1242/jeb.237701 Published 30 November 2020

    Summary: The rise in thyroid hormone levels at the end of incubation plays a role in regulating hatching and development of endothermy in Pekin ducks through changes in metabolism and ventilatory control.

  • RESEARCH ARTICLE
    Early-life hypoxia alters adult physiology and reduces stress resistance and lifespan in Drosophila
    Danielle M. Polan, Mohammed Alansari, Byoungchun Lee, Savraj S. Grewal
    Journal of Experimental Biology 2020 223: jeb226027 doi: 10.1242/jeb.226027 Published 23 November 2020

    Summary: Early-life hypoxia exposure in Drosophila leads to a subsequent change in adult physiology that is associated with reduced stress tolerance and shortened lifespan.

  • METHODS & TECHNIQUES
    A method for studying the metabolic activity of individual tardigrades by measuring oxygen uptake using microrespirometry
    Bjarke H. Pedersen, Hans Malte, Hans Ramløv, Kai Finster
    Journal of Experimental Biology 2020 223: jeb233072 doi: 10.1242/jeb.233072 Published 19 November 2020

    Summary: Presentation of a method for the quantification of O2 respiration rate in the tardigrades Richtersius coronifer and Macrobiotus macrocalix using microrespirometry.

  • RESEARCH ARTICLE
    Temperature effects on metabolic scaling of a keystone freshwater crustacean depend on fish-predation regime
    Douglas S. Glazier, Jeffrey P. Gring, Jacob R. Holsopple, Vojsava Gjoni
    Journal of Experimental Biology 2020 223: jeb232322 doi: 10.1242/jeb.232322 Published 12 November 2020

    Highlighted Article: The metabolic pace of life of a species relates not only to body mass and temperature, but also to predation regime and the interactive effects of all three of these factors.

  • RESEARCH ARTICLE
    Life stages differ in plasticity to temperature fluctuations and uniquely contribute to adult phenotype in Onthophagus taurus dung beetles
    Amanda W. Carter, Kimberly S. Sheldon
    Journal of Experimental Biology 2020 223: jeb227884 doi: 10.1242/jeb.227884 Published 16 October 2020

    Summary: Life stages differ in thermal plasticity to increased temperature fluctuations, which may affect how some organisms fare under a warming climate.

  • RESEARCH ARTICLE
    GABA metabolism is crucial for long-term survival of anoxia in annual killifish embryos
    Daniel E. Zajic, Jason E. Podrabsky
    Journal of Experimental Biology 2020 223: jeb229716 doi: 10.1242/jeb.229716 Published 14 October 2020

    Summary: Anoxic annual killifish embryos produce millimolar quantities of GABA. Interruptions in GABA metabolism decrease anoxia tolerance. We propose that GABA supports anoxia tolerance as a neurotransmitter and an anti-oxidant.

  • RESEARCH ARTICLE
    A slow V̇O2 on-response allows comfortable adoption of aerobically unaffordable walking and running speeds on short stair ascents
    Alberto E. Minetti, Fabrizio Rapuzzi, Cristine Lima Alberton, Gaspare Pavei
    Journal of Experimental Biology 2020 223: jeb218982 doi: 10.1242/jeb.218982 Published 6 October 2020

    Summary: Spontaneous walking and running upstairs, when limited to about two floors, is metabolically well tolerated despite the high mechanical power required, and is possible because of the slow V̇O2 on-kinetics.

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