Effects of salinity fluctuation on the hemolymph composition of the blue crab Callinectes sapidus |
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Authors: | A M Findley W B Stickle |
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Institution: | (1) Department of Zoology and Physiology, Louisiana State University, Baton Rouge, Louisiana, USA |
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Abstract: | The hemolymph of the blue crab Callinectes sapidus was hyperosmotic during 20-10-20 S and 30-10-30 S diurnal cycles. The hemolymph became isosmotic at 26 S and hyposmotic at 28 S in the 10-30-10 S diurnal cycle. Hemolymph Na+ was hyperionic to seawater throughout all cycles. Hemolymph Cl- was hyperionic below 24 S and either isionic or hypoionic from 24 to 30 S. Hemolymph K+ concentrations were hyperionic below 26 S and either isionic or hypoionic from 26 to 30 S. Hemolymph Mg++ values were hypoionic over the experimental salinity range (10 to 30 ). Hemolymph ninhydrin-positive substances (NPS) levels were directly related to ambient salinity. |
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