DIPLOID RADIATION GYNOGENESIS IN FISH
In experiments with groundling and carp, it was established that x irradiation of the sperms and fertilization by them of normal spawn gives a degree of damage to the developing embryos which increases as the radiation dose rises from 2000 to 6000 r. Beyond this limit the damage is lessened and despite an increase in the dose, a gradual return to normal is observed in terms of mortality and percentage of chromosome breaks. Further, although the degree of deformation diminishes, the percentage of deformed embryos remains at a constant extremely high level. Single normal individuals make their appearance at very highdoses of radiation ranging from 100,000 to 200,000 r. The picture of the so- called Hertwing effect is observed in these phenomena. Experiments with Prussion carp (Carassius auratus gibelio) of a unisexual line showed that the ability to undergo natural gynogenesis enables the spawn of this fish to withstand the destructive action of sperm exposed to ionizing radiations irrespective of the size of the dose employed. (auth)
- Research Organization:
- Inst. of Biological Physics, Academy of Sciences, Moscow; Inst. of Pond Pisciculture of the R.S.F.S.R., Moscow
- NSA Number:
- NSA-15-015430
- OSTI ID:
- 4043205
- Journal Information:
- Biophysics (U.S.S.R.)(English Translation), Journal Name: Biophysics (U.S.S.R.)(English Translation) Vol. Vol: 5: No. 4
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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