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osmoregulation

  • RESEARCH ARTICLE
    Cortisol is an osmoregulatory and glucose-regulating hormone in Atlantic sturgeon, a basal ray-finned fish
    Stephen D. McCormick, Meghan L. Taylor, Amy M. Regish
    Journal of Experimental Biology 2020 223: jeb220251 doi: 10.1242/jeb.220251 Published 16 September 2020

    Summary: Cortisol increases during exposure to seawater and exogenous cortisol upregulates gill NKA, NKCC and H+-ATPase and plasma glucose in sturgeon; thus, cortisol is a key osmoregulatory and glucocorticoid hormone in chondrosteans.

  • RESEARCH ARTICLE
    Salt-water acclimation of the estuarine crocodile Crocodylus porosus involves enhanced ion transport properties of the urodaeum and rectum
    Martin Grosell, Rachael M. Heuer, N. C. Wu, Rebecca L. Cramp, Yadong Wang, Edward M. Mager, Ross G. Dwyer, Craig E. Franklin
    Journal of Experimental Biology 2020 223: jeb210732 doi: 10.1242/jeb.210732 Published 17 February 2020

    Summary: The crocodile Crocodylus porosus responds to increased salinity by enhancing solute-coupled water absorption in the urodaeum; this response serves to conserve water and enables them to thrive in hyperosmotic environments.

  • RESEARCH ARTICLE
    Hemodynamic responses to warming in euryhaline rainbow trout: implications of the osmo-respiratory compromise
    Daniel Morgenroth, Andreas Ekström, Per Hjelmstedt, Albin Gräns, Michael Axelsson, Erik Sandblom
    Journal of Experimental Biology 2019 222: jeb207522 doi: 10.1242/jeb.207522 Published 5 September 2019

    Summary: Gastrointestinal blood flow of seawater-acclimated fish is fine-tuned to elevate water absorption and maintain osmotic balance during acute temperature increases.

  • RESEARCH ARTICLE
    Comprehensive analysis of genes contributing to euryhalinity in the bull shark, Carcharhinus leucas; Na+-Cl− co-transporter is one of the key renal factors upregulated in acclimation to low-salinity environment
    Itaru Imaseki, Midori Wakabayashi, Yuichiro Hara, Taro Watanabe, Souichirou Takabe, Keigo Kakumura, Yuki Honda, Keiichi Ueda, Kiyomi Murakumo, Rui Matsumoto, Yosuke Matsumoto, Masaru Nakamura, Wataru Takagi, Shigehiro Kuraku, Susumu Hyodo
    Journal of Experimental Biology 2019 222: jeb201780 doi: 10.1242/jeb.201780 Published 27 June 2019

    Summary: Na+-Cl− cotransporter expressed in the late distal tubule is one of the key renal factors that contributes to euryhalinity of the bull shark, Carcharhinus leucas.

  • RESEARCH ARTICLE
    The mineralocorticoid receptor contributes to barrier function of a model fish gill epithelium
    Dennis Kolosov, Scott P. Kelly
    Journal of Experimental Biology 2019 222: jeb192096 doi: 10.1242/jeb.192096 Published 31 May 2019

    Summary: Cortisol relays its action via glucocorticoid and mineralocorticoid receptors (MRs) in fish tissues; mr knockdown in a cultured trout gill epithelium shows that MRs play a role in cortisol-mediated tightening of this tissue.

  • RESEARCH ARTICLE
    Effects of temperature and salinity on body fluid dynamics and metabolism in the estuarine diamondback terrapin (Malaclemys terrapin)
    Amanda Southwood Williard, Leigh Anne Harden, T. Todd Jones, Stephen R. Midway
    Journal of Experimental Biology 2019 222: jeb202390 doi: 10.1242/jeb.202390 Published 21 May 2019

    Summary: Estuarine diamondback terrapins maintain osmotic balance under variable salinity conditions by using energetically efficient behavioral adjustments and water conservation strategies.

  • RESEARCH ARTICLE
    Water and ion transport across the eversible vesicles in the collophore of the springtail Orchesella cincta
    Barbora Konopová, Dennis Kolosov, Michael J. O'Donnell
    Journal of Experimental Biology 2019 222: jeb200691 doi: 10.1242/jeb.200691 Published 20 May 2019

    Summary: An inverse Ramsay assay and electrophysiology demonstrate that the eversible vesicles in the collophore of springtails absorb water and transport Na+, K+, Cl−, H+ and NH4+.

  • RESEARCH ARTICLE
    Changes in free amino acid concentrations and associated gene expression profiles in the abdominal muscle of kuruma shrimp (Marsupenaeus japonicus) acclimated at different salinities
    Hiroki Koyama, Nanami Mizusawa, Masataka Hoashi, Engkong Tan, Ko Yasumoto, Mitsuru Jimbo, Daisuke Ikeda, Takehiko Yokoyama, Shuichi Asakawa, Sanit Piyapattanakorn, Shugo Watabe
    Journal of Experimental Biology 2018 221: jeb168997 doi: 10.1242/jeb.168997 Published 5 June 2018

    Summary: Kuruma shrimp, Marsupenaeus japonicus, change free amino acid concentrations and associated gene expression levels in their muscle to adjust effectively to different salinities.

  • RESEARCH ARTICLE
    Reduced thermal tolerance during salinity acclimation in brook trout (Salvelinus fontinalis) can be rescued by prior treatment with cortisol
    Ciaran A. Shaughnessy, Stephen D. McCormick
    Journal of Experimental Biology 2018 221: jeb169557 doi: 10.1242/jeb.169557 Published 19 March 2018

    Summary: Brook trout experience a transient reduction in thermal tolerance during salinity acclimation, and improved osmoregulation after cortisol treatment corresponds with improved thermal tolerance.

  • RESEARCH ARTICLE
    Functional classification of gill ionocytes and spatiotemporal changes in their distribution after transfer from seawater to freshwater in Japanese seabass
    Mayu Inokuchi, Masahiro Nakamura, Hiroshi Miyanishi, Junya Hiroi, Toyoji Kaneko
    Journal of Experimental Biology 2017 220: 4720-4732; doi: 10.1242/jeb.167320

    Summary: Gill ionocytes in Japanese seabass originate from undifferentiated cells in the filaments and expand their distribution to the lamellae during freshwater acclimation.

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