L. Forró szerk.: Miscellanea Zoologica Hungarica 10. 1995 (Budapest, 1995)

Specziár, A.; Vida, A.: Comparative study of Gymnocephalus cernuus (Linnaeus, 1758) and G. baloni Holcik and Hensel, 1974 (Pisces, Percidae)

Fig. 5. The food composition of Gymnocephalus baloni and G cernuus in the Danube. A = G. baloni at Háros; B = G. baloni in the Szigetköz side-branch system; C = G. cernuus at Háros; D = G. cernuus in the Szigetköz side-branch system