. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 158 TAMIKO IWASAKI pycnotic within one day after irradiation (Fig. 10). On the other hand, growing oocytes did not show any immediate effects of radiation (Fig. 11), and the matura- tion division and the nuclei of eggs undergoing cleavage were generally normal in appearance although some individuals having eggs with abnormal nuclei were occasionally found. It should be pointed out that in adults as well as young shrimps, repopulation of the surviving oogonia was observed. That is, some dividing oogonia as well as oocytes wer
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 158 TAMIKO IWASAKI pycnotic within one day after irradiation (Fig. 10). On the other hand, growing oocytes did not show any immediate effects of radiation (Fig. 11), and the matura- tion division and the nuclei of eggs undergoing cleavage were generally normal in appearance although some individuals having eggs with abnormal nuclei were occasionally found. It should be pointed out that in adults as well as young shrimps, repopulation of the surviving oogonia was observed. That is, some dividing oogonia as well as oocytes were found at various times after irradiation in the ovary of adult shrimps receiving 2 or 5 krads (Figs. 11, 12a, 12b). In the ovaries of unirradiated adult shrimps, this situation is rarely observed. However, whether or not these. f2b 12. Ovary of an adult Artemia 2 weeks after irradiation with 2 krads showing sonic mitotic oogonia (nig) ; a: X 300, b: X 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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