Raikova-Petrova, G. and Zivkov, M. (1998) Maturity, spawning and sex ratio of pike perch, Stizostedion lucioperca (L.), in two Bulgarian reservoirs as compared to other European habitats. J. Appl. Ichthyol., pp. 31-35
| Species | Development state | Trait | Primary Data | Secondary Data |
| Sander lucioperca | Female | Age at sexual maturity | 2 | 2.0 year |
| Sander lucioperca | Female | Age at sexual maturity | In the moutain reservoir Batak Dam, pike perch begin to spawn at age 2, and 1 in the Ovcharitsa reservoir. In different reservoirs and dams, age at maturity for female range from 1-2 to 9-10, mostly 3-5 | 1.5 year |
| Sander lucioperca | Female | Length at sexual maturity | 27.8-29.7 [Smallest size, sex specified] | 28.75 cm |
| Sander lucioperca | Female | Length at sexual maturity | The smallest sizes of mature females in reservoir Batak Dam is 29.7 cm, and in Ovcharitsa cooling reservoir 27.8 | 29.7 cm |
| Sander lucioperca | Female | Weight at sexual maturity | 0.230-0.275 [Smallest weight, sex specified] | 0.25 kg |
| Sander lucioperca | Female | Weight at sexual maturity | The smallest weight of mature females in reservoir Batak Dam is 270 g, and in Ovcharitsa cooling reservoir 230 g | 270.0 kg |
| Sander lucioperca | Male | Age at sexual maturity | 2 [Sex specified] | 2.0 years |
| Sander lucioperca | Male | Age at sexual maturity | In the moutain reservoir Batak Dam, pike perch begin to spawn at age 2, and 1 in the Ovcharitsa reservoir. In different reservoirs and dams, age at maturity for male range from 1-2 to 8-9, mostly 2-4 | 1.5 years |
| Sander lucioperca | Male | Length at sexual maturity | 21.3-29.0 [Smallest size, sex specified] | 25.15 cm |
| Sander lucioperca | Male | Length at sexual maturity | The smallest sizes of mature males in reservoir Batak Dam is 29 cm, and in Ovcharitsa cooling reservoir 21.3 | 29.0 cm |
| Sander lucioperca | Male | Weight at sexual maturity | 0.110-0.270 [Smallest weight, sex specified] | 0.19 kg |
| Sander lucioperca | Male | Weight at sexual maturity | The smallest wieght of mature females in reservoir Batak Dam is 270 g, and in Ovcharitsa cooling reservoir 110 g | 270.0 kg |
| Sander lucioperca | Spawning conditions | Spawning season | Pike perch in the Batak Dam usually spawn from the end of March until the end of April, at water temperatures between 4°C and 6°C. Spawning begins earlier in the cooling reservoir (end of February to the end of March) at water temperatures between 6°c and 12°C | ['February', 'March', 'April'] |
| Sander lucioperca | Spawning conditions | Spawning temperature | Vary according to the area studied between 4-5, to 14-15 | 4.5 °C |