Neja Z., 1989. The growth rate of ruffe, Gymnocephalus cernuus (L., 1758) in the Szczecin Lagoon, the Odra mouth and Lake Dąbie. Acta Ichthyol. Piscat. 19 (1): 3-19.

The otoliths back readings method was applied to test the growth rate of Gymnocephalus cernuus from the three water basins of the Odra estuary area Usability of the von Bertalanfy′s equation and quadratic and cubic polynomials theoretical reading of length and weight growth rate was compared. The weight growth of fish aged two to eight was stated to be very uniform.