| Fishbase |
| Country | Locality | Absolute Fecundity | Relative Fecundity | Fecundity/length relationship | ||||
| min | max | Min | Mean | Max | a | b | ||
| Black Sea and Sea of Azov | 33,800 | 289,400 | 355 | |||||
| Romania | Danube Delta (1987) | 13,914 | 88,976 | 1491 | 3122 | 5414 | ||
| Romania | Danube Delta (1989) | 21,758 | 136,288 | 1996 | 2750 | 3963 | ||