Regulation of sodium in the shore crabCarcinus maenas, adapted to environments of constant and changing salinities

  title={Regulation of sodium in the shore crabCarcinus maenas, adapted to environments of constant and changing salinities},
  author={Dietrich Siebers and Andreas Winkler and K. Leweck and Ahmed H. Madian},
  journal={Helgol{\"a}nder Meeresuntersuchungen},
The activity of Na-K-ATPase was determined in the posterior gills of the shore crabCarcinus maenas during a period following transfer from 35 to 10 ‰ salinity and vice versa at 15 °C. After transfer from high to low salinity, Na-K-ATPase activity increased from 3.2 to 7.0 μmoles Pi mg protein−1 h−1 within a period of 2 to 3 weeks. Transfer of crabs from low to high salinity resulted in reduction of activity from 7.4 to 4.5 μmoles Pi mg protein−1 h−1 within about the same period. The relatively… CONTINUE READING

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