TEP on the tide in killifish (Fundulus heteroclitus): effects of progressively changing salinity and prior acclimation to intermediate or cycling salinity.

Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
Chris M Wood, Martin Grosell

Abstract

Transepithelial potentials (TEP) were measured in killifish, acclimated to freshwater (FW), seawater (SW), 33% S: W or cycling salinities relevant to tidal cycles in an estuary, and subsequently subjected to salinity changes in progressive or random order. Random compared to progressive salinity changes in an upward or downward direction in FW- and SW-acclimated fish, respectively, did not greatly influence responses to salinity change. Fish acclimated to SW or 33% SW as well as those acclimated to cycling salinities behaved similarly (TEP more positive than +15 mV in 100% SW, decreasing to approximately 0 mV at 20-40% SW, and more negative than -30 mV in FW). In contrast, FW-acclimated fish displayed a less pronounced TEP response to salinity (0 mV in FW through 20% SW, increasing thereafter to values more positive than +10 mV at 100% SW). We conclude that when evaluated under estuarine tidal conditions, the killifish gill exhibits adaptive electrical characteristics, opposing Na(+) loss at low salinity and favouring Na(+) extrusion at high salinity, changes explained at least in part by the Cl(-) to Na(+) permeability ratio. Thus animals living in the estuaries can move to lower and higher salinities for short periods with li...Continue Reading

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Feb 24, 2007·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Viviane ProdocimoChris M Wood
Mar 29, 2007·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Josi R TaylorMartin Grosell
Apr 2, 2008·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Chris M Wood, Martin Grosell
Jul 16, 2008·The Journal of Experimental Biology·Graham R ScottChris M Wood
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Citations

Mar 30, 2011·Proceedings of the National Academy of Sciences of the United States of America·Andrew WhiteheadFernando Galvez
Jul 23, 2014·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Vania Lucia LoroChris M Wood
Jan 19, 2016·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Ying GuanFernando Galvez
Dec 24, 2011·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Dawoon JungBruce A Stanton
Apr 1, 2014·General and Comparative Endocrinology·Benjamin P MoormanAndre P Seale
Jun 15, 2011·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Janet Genz, Martin Grosell
Jan 27, 2015·The Journal of Experimental Biology·Benjamin P MoormanAndre P Seale

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