Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: The effects of air exposure and external salinity change on the blood ionic composition of Nuttalina californica (Reeve, 1847)
Student Author(s): Piper, Stephen C.
Faculty Advisor(s): Phillips, John
Pages: 26
Location: Final Papers Biology 175H
Date: June 1974
Keywords: chiton
Abstract: 1. The concentrations of sodium, potassium, calicium, and magnesium in the blood of Nuttalina californica were measured and show the typical molluscan trend. 2. Over a range of experimental salinities from 50 to 150% sea water, the blood values of sodium and magnesium were the same as the same ions in sea water, while blood potassium and calcium levels were higher, possibly by active regulation. 3. The rate of flux was greater in 50 than in 150% sea water for all ions; the rate series appears to be K+ > Na+, Ca2+ > Mg2+ 4. In exposed animals, sodium and calcium were held constant. Potassium was initially lowered, magnesium raised; these changes may be correlated with an observed lowering of metabolism on exposure to air.
Notes: Publ 1975, Veliger 18 (Suppl): 103-108