. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 248 D. J. QUINN AND C E. LANE RESULTS AND DISCUSSION The oxygen consumption of Crustacea is influenced by osmotic stress and varies with the ionic regulatory ability of the species studied. For example, in Eriocheir sinensis there is no change in oxygen consumption when whole animals are studied in fresh water and in full strength sea water (Schwabe, 1933). In stenohaline 6.0 r 5.0 I- CL O 5 O o> E 4.0 3.0 (VI X O O "^ 2.0 1.0 - NaCI A - CHOLINE CHLORIDE. 0 120 240 360 480 CONCN. OF NaCI OR CHOLINE CHLORIDE FIGURE 3.
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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 248 D. J. QUINN AND C E. LANE RESULTS AND DISCUSSION The oxygen consumption of Crustacea is influenced by osmotic stress and varies with the ionic regulatory ability of the species studied. For example, in Eriocheir sinensis there is no change in oxygen consumption when whole animals are studied in fresh water and in full strength sea water (Schwabe, 1933). In stenohaline 6.0 r 5.0 I- CL O 5 O o> E 4.0 3.0 (VI X O O "^ 2.0 1.0 - NaCI A - CHOLINE CHLORIDE. 0 120 240 360 480 CONCN. OF NaCI OR CHOLINE CHLORIDE FIGURE 3. Effect of NaCI and choline chloride on oxygen uptake by excised gill. In- dividual crabs were maintained in 2 1. of tap H2O for 2 weeks prior to the experiments. Each point is an average value of up to 16 different crabs. The range of final sodium concentrations on the graph correspond to 0-100% sea water. Maja and Libinia the Q02 in 50% sea water is significantly decreased from that in 100% sea water (King, 1965). In euryhaline Carcinus and Collinectcs oxygen consumption is increased 30-50% in dilute sea water (King, 1965). In Hemigrap- sus nudus and H. oreyonensis oxygen consumption is increased as the animals are exposed to increasingly dilute sea water (Dehnel, 1960). This increase in Qo2 is attributed to work done in maintaining an osmotic gradient between the blood and external medium (Dehnel and McCaughran, 1964).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory