Abstract
The influence of salinity acclimation on the lipids of gill mitochondrial membranes was investigated in the osmoconforming oyster Crassostrea virginica. Commercially obtained oysters were maintained at 300 or 1000 mOsm for 1 mo at 10°C and fed identical diets of cultured algae. Salinity exposure induced an increase in some of the negatively charged phospholipids. This response may be a mechanism to bind accumulated cations which would otherwise interfere with intracellular metabolism. Lower levels of n6 fatty acids were also observed at high salinities, compared to oysters in dilute seawater and are consistent with the established marine versus freshwater n6 pattern. Arrhenius plots of membrane-bound carnitine palmitoyl transferase activity failed to display a shift in breakpoints, indicating the changes observed did not influence the properties of the membrane.
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Communicated by R. J. Thompson, St. John's
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Glémet, H.C., Ballantyne, J.S. Influences of environmental salinity on the structure and function of gill mitochondrial membranes of an osmoconforming invertebrate, Crassostrea virginica . Marine Biology 121, 673–683 (1995). https://doi.org/10.1007/BF00349303
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DOI: https://doi.org/10.1007/BF00349303