Banbura, J. and Koszalinski, H. (1991) Fecundity of some species of fish in the Warta River. Acta Univ. Lodz., Folia Limn., pp. 123-134
| Species | Development state | Trait | Primary Data | Secondary Data |
| Blicca bjoerkna | Female | Length at sexual maturity | Mean of 20.61, range 18.4-33.1 for females studied | 25.75 cm |
| Blicca bjoerkna | Female | Relative fecundity | 256-773 | 514.5 thousand eggs/kg |
| Blicca bjoerkna | Female | Absolute fecundity | Mean of 53 144, range 37 753-116 720 Others studies described it as: 6 700-197 700] | 434.5 thousand eggs |
| Cyprinus carpio | Female | Relative fecundity | Different means vary between 290 to 588 | 290.0 thousand eggs/kg |
| Gobio gobio | Female | Length at sexual maturity | Mean of 11.04, range 8.5-13.6 for females studied | 11.05 cm |
| Gobio gobio | Female | Absolute fecundity | Mean of 4 643, range 629-14 600 | 321.5 thousand eggs |
| Rutilus rutilus | Female | Length at sexual maturity | Mean of 18.37, range 11.7-28.2 for females studied | 19.95 cm |
| Rutilus rutilus | Female | Relative fecundity | Different means vary between 158.98 to 320.41 | 158.98 thousand eggs/kg |
| Rutilus rutilus | Female | Absolute fecundity | Mean of 14 816, range 2 615-70 897 | 342.5 thousand eggs |
| Esox lucius | Female | Length at sexual maturity | Mean of 41.22, range 35.2-58.0 for females studied | 46.6 cm |
| Esox lucius | Female | Relative fecundity | 49 ± 9.96 | 49.0 thousand eggs/kg |
| Esox lucius | Female | Absolute fecundity | Mean of 19 465, range 9 068-38 567 | 53.0 thousand eggs |
| Lota lota | Female | Length at sexual maturity | Mean of 22.95, range 21.2-25.9 for females studied | 23.55 cm |
| Lota lota | Female | Relative fecundity | 957.48 ± 180.27 | 957.48 thousand eggs/kg |
| Lota lota | Female | Absolute fecundity | Mean of 89 692, range 60 728-159 613 | 443.5 thousand eggs |