. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 184 LARRY C. OGLESBY significantly higher (CF/M := ± ; N =: 10) than for the worms adapted to lower salinities (CF/M := ± ; N==SO). Even in the lugworms adapted to 97% SW, the internal Cl~ was significantly hypo-ionic to that of the medium by There was no significant difference in the extent of this slight hypo-ionic condition between lugworms adapted to 97% SW for 5 days in the laboratory and those adapted for 13 days. PER CENT StAWATER 0 25 50 500. 100 500 MEDIUM: mM Na FIGURE 3. Relationship of
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 184 LARRY C. OGLESBY significantly higher (CF/M := ± ; N =: 10) than for the worms adapted to lower salinities (CF/M := ± ; N==SO). Even in the lugworms adapted to 97% SW, the internal Cl~ was significantly hypo-ionic to that of the medium by There was no significant difference in the extent of this slight hypo-ionic condition between lugworms adapted to 97% SW for 5 days in the laboratory and those adapted for 13 days. PER CENT StAWATER 0 25 50 500. 100 500 MEDIUM: mM Na FIGURE 3. Relationship of Na+ concentration in coelomic fluid of Ab. pacifiea to Na+ concentration of external medium. Diagonal line indicates equal internal and external con- centration; Na+ concentrations for Arenicola marina: 1, from Robertson (1949); 2, from Nesterov and Skulski (1965). Figure 5 presents the results of water content determinations of Ab. pad fie a adapted to a wide range of salinities. A single regression line (method of least squares) was fitted to the data. The results show that the water content of Ab. pacifiea is strongly dependent upon the external salinity: the lower salinity, the more hydrated the worms become. DISCUSSION Abarenicola pacifiea is an osmotic conformer over the entire salinity range tested (29% to 96% SW). Over this entire salinity range, the coelomic fluids. 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 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
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