. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 7-RAY EFFECT ON GONAD OF ART EM IA 15; stage of development of the oocytes at the time of irradiation. In Artemia receiving 2 krads of y-rays, oocytes in various stages (pre-meiotic, meiotic prophase and the first maturation division ) and eggs undergoing early cleavage in the uterus re- mained apparently intact during the first day following irradiation. Two weeks after irradiation, most growing oocytes present at the time of irradiation had reached the mature stage, and they subsequently underwent normal maturation divisio
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 7-RAY EFFECT ON GONAD OF ART EM IA 15; stage of development of the oocytes at the time of irradiation. In Artemia receiving 2 krads of y-rays, oocytes in various stages (pre-meiotic, meiotic prophase and the first maturation division ) and eggs undergoing early cleavage in the uterus re- mained apparently intact during the first day following irradiation. Two weeks after irradiation, most growing oocytes present at the time of irradiation had reached the mature stage, and they subsequently underwent normal maturation division (Figs. 9a, 9b). In contrast to this, oocytes in adults receiving 5 krads were damaged to various degrees depending on their stage of development (Figs. 10, 11). Generally, oocytes at the pre-meiotic stage were severely damaged, and their nuclei became. 10. 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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