No detailed citation.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Gymnocephalus cernua | Egg | Oocyte diameter | 0.9-1.2 | 1.05 mm |
| Gymnocephalus cernua | Female | Age at sexual maturity | 1-3 [Sex not specified] | 2.0 year |
| Gymnocephalus cernua | Female | Relative fecundity | 305-1540 | 922.5 thousand eggs/kg |
| Gymnocephalus cernua | Male | Age at sexual maturity | 1-3 [Sex not specified] | 2.0 years |
| Gymnocephalus cernua | Spawning conditions | Spawning season | March to August | ['March', 'April', 'May', 'June', 'July', 'August'] |
| Gymnocephalus cernua | Spawning conditions | Spawning temperature | 12-18 | 15.0 °C |
| Gymnocephalus cernua | Spawning conditions | Spawning substrate | Plants, or gravel | Lithophils |
| Gymnocephalus cernua | Spawning conditions | Spawning release | Female spawn several batches during the spawning season | Multiple |