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Aspects of Osmotic and Ionic Regulation in Corophium Volutator (Pallas)

Published online by Cambridge University Press:  11 May 2009

Donald S. McLusky
Donald S. McLusky
Affiliation:
Department of Biology, The University, Stirling, Scotland
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Extract

Experiments have been made to elucidate the problem of hyperosmotic regulation in the mud-dwelling euryhaline amphipod, Corophium volutator. The animal produced urine hypo-osmotic to the blood when acclimatized to low salinities, and isosmotic urine at salinities above 20%. The restricted permeable areas of the cuticle have been localized by silver staining. Over a range of salinities from 1 to 35 % C. volutator was found to maintain Na+, K-−, Ca2+, Cl-−, more concentrated than the medium, and Mg2~ less concentrated. The importance of these mechanisms in assisting hyperosmotic regulation is discussed.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 48 , Issue 3 , October 1968 , pp. 769 - 781
Copyright
Copyright © Marine Biological Association of the United Kingdom 1968

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