Sarvala, J. and Helminen, H. and Hirvonen, A. (1992) Fecundity of vendace (Coregonus albula) in relation to year-class variations in Lake Pyhäjärvi, SW-Finland. Pol. Arch. Hydrobiol., pp. 341-349
| Species | Development state | Trait | Primary Data | Secondary Data |
| Coregonus albula | Female | Age at sexual maturity | The spawning stock consisted mainly of age 1+ fishes, and thier numbers varied little during the study period | 1.0 year |
| Coregonus albula | Female | Length at sexual maturity | Overall mean length was 20.9 ±2.3 | 20.9 cm |
| Coregonus albula | Female | Weight at sexual maturity | Overall mean weight was 71.5±25.0 | 71.5 kg |
| Coregonus albula | Female | Absolute fecundity | Overall, mean fecundity was 10390 ±3890 | 10390.0 thousand eggs |
| Coregonus albula | Female | Maximum GSI value | Means of GSI very between 24.1-29.5 between years | 26.8 percent |
| Coregonus albula | Spawning conditions | Spawning season | Vendace spawn in Pyhäjärvi in early November | ['November'] |
| Coregonus albula | Spawning conditions | Spawning temperature | When the water temperature was about 4°C | 4.0 °C |
| Coregonus albula | Spawning conditions | Parity | Four year ages sampled | No category |