. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Days FIGURE 6. Effects of ganglion ablation on growth of zooids. Average growth curves of 35 operated zooids (solid circles) and 27 control zooids (open circles) are depicted. species. For example, control of sexual reproduction by the neurosecretory sys- tem in some species is inhibitory in character, whereas a positive gonadotropic influence exists in other species. Neurosecretory materials in Hydra act somewhat like a growth hormone and inhibit gonad development (Schaller, 1973; Schaller and Gierer, 1973). Clearly, neuros
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Days FIGURE 6. Effects of ganglion ablation on growth of zooids. Average growth curves of 35 operated zooids (solid circles) and 27 control zooids (open circles) are depicted. species. For example, control of sexual reproduction by the neurosecretory sys- tem in some species is inhibitory in character, whereas a positive gonadotropic influence exists in other species. Neurosecretory materials in Hydra act somewhat like a growth hormone and inhibit gonad development (Schaller, 1973; Schaller and Gierer, 1973). Clearly, neurosecretory cells in Hydra affect asexual reproduc-. Days 10 Days FIGURE 7. Effects of ganglion ablation on oocyte growth. Average oocyte number in 35 operated zooids (solid circles) and 27 control zooids (open circles) are depicted: (A) variation in the number of oocytes in the stage of previtellogenesis; (B) variation in the number of vitellogenic 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
