Lahti, E. and Muje, P. (1991) Egg quality and female condition in vendace (Coregonus albula L.) before and during spawning. Hydrobiologia, pp. 175-182
| Species | Development state | Trait | Primary Data | Secondary Data |
| Coregonus albula | Female | Onset of oogenesis | May-June to July, slight increase of GSI | ['May', 'June', 'July'] |
| Coregonus albula | Female | Intensifying oogenesis activity | Gonadal development occurs mainly in summer | ['July', 'August', 'September'] |
| Coregonus albula | Spawning conditions | Spawning period duration | Several weeks | No data |