. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. , FIGURE 3. (A) Cross section of Haloclara producta at the level of the actinopharynx. Scale indicates 1 mm. (B) Cross section of Metridiiun senile at tlie level of the actinopharynx. Scale indicates 1 mm. shows no mortality, at least during the first 266 hours; which was the longest dosage attempted. Simultaneous controls show uniform survival. The resistance of H. prodncta to low oxygen is apparently paralleled by a a resistance to internal hydrogen sulfide. Approximately 120 hours after being in- troduced into low oxygen
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. , FIGURE 3. (A) Cross section of Haloclara producta at the level of the actinopharynx. Scale indicates 1 mm. (B) Cross section of Metridiiun senile at tlie level of the actinopharynx. Scale indicates 1 mm. shows no mortality, at least during the first 266 hours; which was the longest dosage attempted. Simultaneous controls show uniform survival. The resistance of H. prodncta to low oxygen is apparently paralleled by a a resistance to internal hydrogen sulfide. Approximately 120 hours after being in- troduced into low oxygen water the animals begin to turn black. The coloration begins at the mouth end and slowly proceeds aborally during a period of several days. Dissection of such animals reveals deposits of dark material on the mesen- teries and the inside surface of the body wall, in addition to the noticeable odor of hydrogen sulfide. This color change is not accompanied by death and subsequent decomposition. Upon return of intact black H. producta to running seawater the. 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
Size: 1443px × 1731px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
