ホソワラジムシの卵巣発育に及ぼすサイナス腺除去の影響

概要

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In order to study some possible effects of sinus gland upon the ovarian growth, the sinus glands of both sides were removed from the adult females of the land isopod, Metoponorthus pruinosus, during the non-breeding season. The ovaries of operated animals were investigated at 15, 40, 45 and 60-day stages after operation. As the control operation, the animals were only traumatized externally. 1. The normal ovary of the intact animals before operation was found to be filled with immature eggs less than 0.20 mm. in diameter. 2. After the removal of sinus glands of both sides, no acceleration of ovarian growth could be observed in comparison with that of the traumatized control. Namely, sizes of ovaries and ovarian egg-diameters in the experimental animals remain almost unchanged, although a few large eggs ranging from 0.26 to 0.50 mm. in diameter were found rarely. 3. The deposition of oil drops in the egg-cytoplasm is somewhat advanced in the experimental animals, especially at 30-day stage after operation. Accordingly, the maturation of ovarian eggs is assumed to be acceralated slightly by the removal of sinus gland. 4. It may be concluded that the role of sinus gland in this isopod seems to be an storage of some inhibiting substance to the process of the ovarian egg development.
社団法人日本動物学会の論文
1958-11-15