O. G. Dely szerk.: Vertebrata Hungarica 2/1-2. (Budapest, 1960)
Berinkey, L.: The Stickleback (Gasterosteus aculeatus Linneus), a new fish species from Hungary 1-10. o.
VASILIU /26/ and CARAUSU /9/ list the lower rbäcnee of the Danube, the Dnieeter and the Dnieper as its potamlc localities of occurrence. As shown by the data of its range, it penetrates far up in Beveral large European rivers, and as its near ally, Pungltlus platygaster /KESSLER/ was shown from the Save since long, the specimen in question had, in all probability, wandered upwards from the Lower Danube. It remains queetionable only whether this too was as accidental ae the capture in Budapest of Casplalosa keeslerl pontica /BICHW./ in 1846, or if it means the actual expansion of the range of the species as in the case of Proterorhlnus marmo- ratue /PALL./. That small-sized fisheB remain concealed from collectors for long is demonstrated by the fact that Cot tus gobio L. might be considered ae rare in the Budapest reaches of the Danube; thus HERMAN /15/ believed it to be a rarity even around Komárom, and yet, in November and December of 1959, and as a result of good collecting possibilities due to a high water level, the Fish Collection of the NATURAL HISTORY MUSEUM grew richer by 41 specimens of this form from the Vac-BudapeBt reach of the river. The second, and the less probable, explanation is that the species might have arrived from the upper reaches of the Danube. According to the statements of GROTE and VOGT and HO F ER /7/, the Bpecies occurs in the Upper Danube /the Isar and near Munich/. These authors state that aquarists had introduced it here in the eighties of the last century. Since then, this datum had been taken over by some other writers, but I never found it stated as a personal observation. BAUCH /2/ also writes that the species is absent from the water system of the Danube, never validating the above mentioned old datum of GROTE, VOGT and HOFER /7/. The occurrence of the stickleback in Hungary is not only a further increase of our home fish fauna but also a striking new zoögeographical datum.
