. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 138 HOWARD A. SCHNEIDERMAN AND CARROLL M. WILLIAMS have been recorded if the animal were enclosed in a Warburg respirometer in the presence of acid. After 105 minutes, oxygen was injected to restore the original gas concentration and the experiment continued. It is at once evident that the changes which were actually observed in the volume of the abdomen were extremely minor. In the experiment in Figure 6 three of the abdominal volume changes more or less correlate with carbon dioxide. INCREASE IN VOLUME OF ABDOMEN I DECREAS
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 138 HOWARD A. SCHNEIDERMAN AND CARROLL M. WILLIAMS have been recorded if the animal were enclosed in a Warburg respirometer in the presence of acid. After 105 minutes, oxygen was injected to restore the original gas concentration and the experiment continued. It is at once evident that the changes which were actually observed in the volume of the abdomen were extremely minor. In the experiment in Figure 6 three of the abdominal volume changes more or less correlate with carbon dioxide. INCREASE IN VOLUME OF ABDOMEN I DECREASE IN VOLUME T OF ABDOMEN tO 30 30 40 50 60 70 80 90 CO 110 120 130 MO 150 160 170 180 BO 200 t t t t t t t BURST BURST BURST BURST BURST BURST MINUTES 6. Volume changes of the pupal abdomen in relation to the cyclic release of carbon dioxide. See text. bursts. However, bursts occurred on three other occasions without any de- tectable change in abdominal volume. Moreover, in all cases where changes in abdominal volume were recorded, they took place at least several minutes after the initiation of a burst and were of exceedingly short duration; namely, an abrupt slight decrease followed by an equally rapid increase. It is of particular interest to note that any decrease in abdominal volume was always accompanied by a corresponding increase in the volume of the anterior end. This fact accounts for. 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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