Abstract
ABSTRACTOxygen uptake of Penaeus californiensis was investigated using a closed manometric chamber. This new manometric approach differs from the classical oxygen measurements in aquatic animals in that no oxygen electrodes (polarographic method) or the chemical assay of Winkler are used in the chamber. The gas phase was continuously recirculated through a base solution. This allows removal of the catabolically produced CO2 which would otherwise interfere with the manometric measurement of O2 and at the same time helps to control the pH over long periods of time. Initial results of oxygen uptake at different temperatures by shrimps of different sizes (0.27 to 9.8 g) over long periods of time (120 hr) are presented.
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