Hansen, L.P. (1980) Age, growth, and maturity of the white bream Blicca bjoerkna (L.) in Lake Oyeren, SE Norway. Fauna norvegica, pp. 15-23
| Species | Development state | Trait | Primary Data | Secondary Data |
| Blicca bjoerkna | Female | Age at sexual maturity | Females and some males reach maturity at an age of 4 years | 4.0 year |
| Blicca bjoerkna | Female | Length at sexual maturity | Mean of 14.4 | 14.4 cm |
| Blicca bjoerkna | Female | Onset of oogenesis | August-September | ['August', 'September'] |
| Blicca bjoerkna | Female | Intensifying oogenesis activity | April | ['April'] |
| Blicca bjoerkna | Female | Maximum GSI value | Mean of 8, but up to 12% [Mid-May] | 8.0 percent |
| Blicca bjoerkna | Male | Age at sexual maturity | Females and some males reach maturity at an age of 4 years, but most males mature one year earlier | 4.0 years |
| Blicca bjoerkna | Male | Length at sexual maturity | Mean of 11.1-13.3 | 12.2 cm |
| Blicca bjoerkna | Male | Male sexual dimorphism | When the white bream reach maturity, females grow faster than males | Absent |
| Blicca bjoerkna | Spawning conditions | Spawning season | In 1974, the white bream spawned from 10 June to 1 July and in 1975 sapwning started at the end of May and lasted about 20 June | ['May', 'June', 'July'] |
| Blicca bjoerkna | Spawning conditions | Spawning period duration | 3-4 [In 1974, the white bream spawned from 10 June to 1 July and in 1975 sapwning started at the end of May and lasted about 20 June] | 3.5 weeks |
| Blicca bjoerkna | Spawning conditions | Parity | Older fish with resting gonads were not found, indicating that spawning takes place each year after maturity is reached | No category |