. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OVARIAN REPRODUCTIVE CYCLE OF ASTERIAS 335 N 2600 D : 25229 SIM 0150 H : H85 X'- 20346 A',v'""ieu«(. FIGURE 2. Frequency distributions of oocyte diameters of Asterias rubens (before McCall transfor- mation), a: For the resting stage (stage 1; substages la and Ib); b: for the early growth stage (stage 2; substages 2a and 2b); c: for the stage of late growth and partial maturation (stage 3; substages 3a and 3b); d: for the maturation stage (stage 4; substages 4a and 4b). of degenerating and "loose" oocytes
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OVARIAN REPRODUCTIVE CYCLE OF ASTERIAS 335 N 2600 D : 25229 SIM 0150 H : H85 X'- 20346 A',v'""ieu«(. FIGURE 2. Frequency distributions of oocyte diameters of Asterias rubens (before McCall transfor- mation), a: For the resting stage (stage 1; substages la and Ib); b: for the early growth stage (stage 2; substages 2a and 2b); c: for the stage of late growth and partial maturation (stage 3; substages 3a and 3b); d: for the maturation stage (stage 4; substages 4a and 4b). of degenerating and "loose" oocytes are presented in Plate III, 3 and 4. All these parameters have been semi-quantitatively scored for each animal. The semi-quan- titative data, obtained in this manner, do not support a subdivision into eight substages. The individual semi-quantitatively determined parameters hardly justify four stages. Only the decrease in the number of invaginations of the hemal system shows four stages (P < ) and permits stage 3 to be subdivided into two substages (P < ). The absence of dividing oogonia and the presence of the jelly coat, cortical vesicles and degenerating oocytes define stages 3 and 4 (P < , P < , P < , P. 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
