. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 10 20 SALINITY (%o) 30 40 FIGURE 4. The relationship between the oxygen consumption rate of Cyathura polita and salinity. The oxygen consumption rate is expressed in milliliters of oxygen consumed per gram ash-free dry weight per 24 hours. Each point represents a mean value with vertical lines indicating plus and minus one standard error. Dotted lines represent results of experiments run on Sapelo Island animals in November, 1961, and solid lines represent results of experiments on Marshfield animals in May, 1962. The upper
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 10 20 SALINITY (%o) 30 40 FIGURE 4. The relationship between the oxygen consumption rate of Cyathura polita and salinity. The oxygen consumption rate is expressed in milliliters of oxygen consumed per gram ash-free dry weight per 24 hours. Each point represents a mean value with vertical lines indicating plus and minus one standard error. Dotted lines represent results of experiments run on Sapelo Island animals in November, 1961, and solid lines represent results of experiments on Marshfield animals in May, 1962. The upper two lines show results of experiments run at 30° C., the lower two, results of experiments run at 15° C. tion was ash-free dry weight/24 hours, and at 30° C. it was ash-free dry weight/24 hours. The corresponding rates for animals from the Marshfield population were and ash-free dry wreight/24 hours. DISCUSSION The habitats of the two populations of C\athura polita appeared to be quite different, but closer analysis revealed that they were similar in many respects. Both had ,sand\- sediments, well aerated water and wide fluctuations in salinity and temperature. Ecological characteristics which were common to both populations were the irregular grouping (Cole, 1946), seasonal changes in sex ratio, and the numerical importance of cyathurans in the faunal associations. The grouped distribution pattern vas more fully developed in the Sapelo population, possibly reflecting a subtle interaction of environmental conditions which made some areas of the beach. 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;
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
