[Variability of the quantitative characteristics in irradiated and non-irradiated fishes from experimental populations. I. Biometric basic characteristics and a comparison of irradiated and non-irradiated groups].

The variability of 35 morphological singns in fishes Barbus conchonius and B. tetrazona from experimental breeding under defined conditions was studied. The experimental groups were irradiated with a single rtg-dose 14.355 mGy. chi 2-test and t-test were used for the statistical evaluation. Statistically significant differences between the irradiated and non-irradiated groups were stated at B. conchonius to be only in the head height, the scale number under the side line, and in almost all plastic signs (with exception of the tail fin and the distance between the nostrils). The differences of most signs were determined on the 1-%-significance level.