. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ACTINULAR BEHAVIOR AND NEMATOCYTES 261. Figure 3. Morphological changes in the body of an actinula larva during settlement (time-lapse video images). (A) Larva undergoing repeated contraction and expansion of the body. (B) Larva beginning settling behavior with sinuous movement and rubbing of the tentacles to surface substrate: this phase was reversible to the temporary attachment phase. (C) Larva that has irreversibly opened the coelenteron in its aboral half to permanent settlement by the basal protrusion. (D) Stolon-elong
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ACTINULAR BEHAVIOR AND NEMATOCYTES 261. Figure 3. Morphological changes in the body of an actinula larva during settlement (time-lapse video images). (A) Larva undergoing repeated contraction and expansion of the body. (B) Larva beginning settling behavior with sinuous movement and rubbing of the tentacles to surface substrate: this phase was reversible to the temporary attachment phase. (C) Larva that has irreversibly opened the coelenteron in its aboral half to permanent settlement by the basal protrusion. (D) Stolon-elongated juvenile polyp, at = aboral tentaclelsi. bp :: basal protrusion, otr = oral tentacle rudiment(s). A-D arc same magnification. Bar = 100 /jm. the coelenteron in the aboral half of the bodies and achieved permanent attachment at the basal protrusion (Fig. 3C). Subsequently, the stem and stolon differentiated and all tentacles extended upward (Fig. 2H. I; Fig. 3D). In these juvenile polyps, the cushion-like tissue disappeared into the endoderm of the aboral half, and many digestive gland cells developed in the endoderm of the oral half of the hydranth (Fig. 4C. D). The resulting structure contrasts with the well-developed cushion-like tissue in the endoderm of the aboral half of an actinula larva and the absence of digestive gland cells in the endoderm of the oral half of the larval body (Fig. 4A, B). Thus, morphological transformation to the juvenile polyps was completed. When larvae (< 8 h old) were given clean glass surfaces. 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. W
Size: 1530px × 1632px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
