Abstract

Systematic experiments on the effects of Co60 (γ-ray) radiation upon the embryos of aquatic animals had not been carried out. We attempted preliminary studies on the eary development of gold-fish (Caracius auratus) projected with Co60 (γ-ray) radiation. In this experiment the embryos were projected with various quantities of γ-ray ranging from 730 r to 31, 500 r. The following observations were obtained during the early developmental stage of goldfish.(1) With increase of the intensity of radiation, the inhibition of hatch rate and retardation of hatcing time remarkably observed.(2) The embryoes were deformed to some exent under the effect of γ-radiation over 1, 000 r.

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