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Marine Biology

, Volume 50, Issue 3, pp 209–213 | Cite as

Effects of fluctuating salinity on the behaviour of the West African blood clam Anadara senilis and on the osmotic pressure and lonic concentrations of the haemolymph

  • J. S. Djangmah
  • S. E. Shumway
  • J. Davenport
Article

Abstract

Specimens of the West African blood clam Anadara senilis were exposed to both sinusoidal and abrupt salinity regimes. Measurements showed that haemolymph osmolality and concentrations of Na, K+, Ca2+ and Mg2+ followed the concentrations of the external medium up to the time of shell valve closure. Shell valves closed when the seawater concentration had fallen to about 15.4% S and reopened at a similar salinity. The closure mechanism was effective in preventing excessive haemolymph dilution.

Keywords

Osmotic Pressure External Medium Valve Closure Salinity Regime Closure Mechanism 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature Cited

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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • J. S. Djangmah
    • 1
    • 2
  • S. E. Shumway
    • 1
  • J. Davenport
    • 1
  1. 1.N.E.R.C. Unit of Marine Invertebrate BiologyMarine Science LaboratoriesMenai BridgeUK
  2. 2.Department of ZoologyUniversity of Cape CoastGhana, West Africa

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