Bieniarz, K. and Epler, P. and Breton, B. and Thuyl., L.N. (1978) The annual reproductive cycle in adult carp in Poland: Ovarian state and serum gonadotropin level. Ann. Biol. Anim. Biochm. Biophys., pp. 917-921
| Species | Development state | Trait | Primary Data | Secondary Data |
| Cyprinus carpio | Female | Age at sexual maturity | 4-5 | 4.5 year |
| Cyprinus carpio | Female | Onset of oogenesis | June-July | ['June', 'July'] |
| Cyprinus carpio | Female | Intensifying oogenesis activity | October to November | ['October', 'November'] |
| Cyprinus carpio | Female | Resting period | Few weeks after spawning | No data |
| Cyprinus carpio | Spawning conditions | Spawning season | May | ['May'] |
| Cyprinus carpio | Spawning conditions | Spawning temperature | 18 | 18.0 °C |