O. G. Dely szerk.: Vertebrata Hungarica 3/1-2. (Budapest, 1961)

Berinkey, L.: Ichtyological notes 2. On the biology of breeding of Carassius auratus gibelio (Bloch) 27-34. o.

VERTEBRATA HUN GA RICA M USE I HISTOR ICO-NATUR ALIS HUN GARICI Fase. 1-2. Ichthyological Notes II. On the Biology of Breeding of Carassius auratus gibelio (Bloch) By L. Berinltey Zoological Department of the Hungarian Natural History Museum, Budapest It is a well-known fact that the testicula of Caraasiua auratus gibeli

o /BLOCH/ transform into ovarla in its second year of age

( to wit, the males become females. And at their subsequent spawning,the spawns are fertilised,by ggpegenese, by other species of the family Cyprlnida

e

. As it happens,the sperm will penetrate the spawn, and the dividing process of the egg will take place, but the sperm does not unite Itself with the ovulum and thus, in essentials, the offspring comes into being by parthenogenesis. According therefore to our present knowledge, the reproduction of this species happens, after the transformation of the males, in the way described above. The usual course of breeding is truly this, but, in my opinion, it will not infrequently happen that the sperm penetrating the spawn will unite with the ovulum, causing a regular fertilization. This seems the more probable as the frequent hybridization among the species of the family Cyprlnida

e ÍB widely known. The correctness of my assumption is substantiated by the following facts.