Boros István (szerk.): A Magyar Természettudományi Múzeum évkönyve 52. (Budapest 1960)

Berinkey, L.: Further morphological and osteological investigations on the hybrids of Hungarian Cyprinids

ANNALES HISTORICO-NATURALES MUSEI NATIONALIS HUNGARICI Toraus 52. PARS ZOOLOGICA I960. Further Morphological and Osteological Investigations on the Hybrids of Hungarian Cyprinids By L. BERINKEY, Budapest Numerous cases of hybridization have been observed between the European species of the family Cyprinidae. Grote, Vogt, and H o f e r (8) enumerate in their comprehensive work the following demonstrated hybrids: 1. Cyprinus carpio X Carassius carassius, 2. Cyprinus carpio X Carassius auratus, 3. Leuciscus cephalus X Alburnus alburnus, 4. Scardinius erythrophthalmus X Alburnus alburnus, 5. Rutilus rutilus X Alburnus alburnus, 6. Blicca bjoerkna X Alburnus alburnus, 7. Leucaspius delineatus X Alburnus alburnus, 8. Scardinius erythrophthalmus X Rutilus rutilus, 9. Scardinius erythrophthalmus X Blicca bjoerkna, 10. Scardinius erythroplhalmus X Abramis brama, 11. Rutilus rutilus X Blicca bjoerkna, 12. Rutilus rutilus X Abramis brama, 13. Abramis melanopsXRutilus rutilus, 14. Abramis bramaX Blicca bjoerkna, 15. Leuciscus cephalus X Chondrostoma nasus, 16. Leuciscus souffia X Chondostroma nasus, 17. Leuciscus cephalus X Leucaspius delineatus, 18. Phoxinus phoxinus X Nemachilus barbatulus. Of the European species, Berg (4) discusses the following recently found ones : 19. Leuciscus idus X Aspius aspius, 20. Blicca bjoerkna X Vimba vimba vimba nat. carinata. Accordingly, we know twenty species from Europe. In Hungary, V u t s k i t s (19) gave a detailed discussion of the hybrids occurring in our fannal area. As a result of his investigations for many years, he succeeded to show the following species from our country: 1. Scardinius erythrophthalmus X Rutilus rutilus, 2. Rutilus rutilusX Alburnus alburnus, 3. Scardinius erythrophthalmus X Alburnus alburnus, 4. Blicca bjoerkna X Alburnus alburnus, 5. Alburnus alburnus X Leucaspius delineatus, 6. Rutilus rutilus X Blicca bjoerkna, 7. Abramis bramaXRutilus rutilus. My attention was called to the study of the hybrids by the fact that the authors, though they divulge the most important morphological features of the hybrids in their papers, fail to give individual comparisons extended also to smaller details. Yet this is indispensable for a more thorough knowledge of hybridization. In an earlier paper of mine (5), I presented the results of my

7 investigations concerning the hybrid of Abramis brama X Rutilus rutilus. The study of this hybrid reaised several problems, so that I made it a point to examine also other species. In this present paper, I wish to discuss my examinations done on the hybrids of Alburnus alburnus x Scardinius erythrophthalmus, Rutilus rutilus x Scardinius erythrophthalmus, and Carassius carassius X Carassius auratus gibelio. Of these, the hybrid between Carassius carassius and Carassius auratus gibelio is, as far as I know, a new form for science. I discuss the several hybrids separately, and then draw the possible conclusions in a summary at the end of the paper. Alburnus alburnus (L.) X Scardinius erythrophthalmus (L.) The hybrid of the two species was first described by J ä c k e 1 (10) as Alburnus rosenhaueri. It is listed under this name also in G ü n t h e r's Catalogue (9). Eighteen years later, B e n e c k e (3) described it again as Scardinopsis alburniformis. Externally, the two parent-species differ widely from each other. The body of the bleak (Alburnus alburnus) is elongated, flattened, its dorsal edge varying,