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Effects of tidal fluctuations of salinity on pericardial fluid composition of the American oyster Crassostrea virginica by S. C. Hand; W. B. Stickle is a Environmental Science article available to read on EtoBox.

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## Ah~m~ Crassostrea virginica Gmelin were subjected to simulated tidal fluctuations of salinity, and the subsequent effects on osmotic and ionic composition of the pericardial fluid, body water and valve movements were investigated. Ambient salinity fluctuation patterns of 20-I0-20~, 15-I0-15~ and I0-5-I0~ were simulated during 24.8-h periods. An additional IO-5-I0~ S experiment was performed using a dilution water approximating the ionic composition of Mississippi River water with regard to Mg ++, Ca++ and SO~, instead of delonized water. Finally the effects of a 2-week diurnal fluctuation pattern between 20 and I0~ S were investigated with respect to pericardial fluid composition. Pericardial fluid osmolality, concentrations of CI-, Na +, Mg++, K+, Ca++ and ninhydrin-positive substances (NPS) were analyzed periodically throughout all experiments. Pericardial fluid osmolality was slightly hyperosmotic as ambient water salinity decreased during a cycle, and then becane slightly hyposmotic as ambient salinity increased. In the 2-week experiment, pericardial fluid osmolality tracked ambient seawater closely through Day 5, but became more intermediate between high and low seawater va

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Author

S. C. Hand; W. B. Stickle

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC (ISSN 0025-3162)

Published

1977

Language

EN

Field

Environmental Science (Physical Sciences)