. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 94 T. VON BRAND, P. McMAHON AND M. O. NOLAN I I I Starving in Water • Desiccation at 96% Relative Humidity A Desiccation at85% Relative Humidity o Desiccation at 74% Relative Humidity o Desiccation at 57% Relative Humidify • Desiccation at 30% Relative Humidity 9 Desiccation at 15% Relative Humidity. DAYS FIGURE 3. Heart rates of Australorbis glabratus starving in water or desiccating at various relative humidities. alive at a specified day. They therefore represent the average changes occurring in a population. Some irregul
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 94 T. VON BRAND, P. McMAHON AND M. O. NOLAN I I I Starving in Water • Desiccation at 96% Relative Humidity A Desiccation at85% Relative Humidity o Desiccation at 74% Relative Humidity o Desiccation at 57% Relative Humidify • Desiccation at 30% Relative Humidity 9 Desiccation at 15% Relative Humidity. DAYS FIGURE 3. Heart rates of Australorbis glabratus starving in water or desiccating at various relative humidities. alive at a specified day. They therefore represent the average changes occurring in a population. Some irregularities in the curves, especially noticeable towards the end of an experiment, are due to the summation of experimental errors and the slightly variable behavior of the individual snails. The curves do not change materially, however, if the data are restricted to snails which are still alive on a day nearing the end of a given experiment, provided the number is sufficient to give a valid average. This is illustrated for one of our series in Table I for weight and other criteria studied. 3. Heart rate. The heart rate of snails (Fig. 3) starving in water slowed precipitously to 63 per cent of the original rate during the first 24 hours of starva- tion. During the remainder of the starvation period the heart rate declined slowly further, the final value being about 40 per cent of the initial one. In snails desic- cating at 96 per cent relative humidity there was no decline during the first 24 hours,. 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 Biologi
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