Bagenal, T.B. (1970) Notes on the biology of the schelly Coregonus lavaretus (L.) in Haweswater and Ullswater. J. Fish Biol., pp. 137-154
| Species | Development state | Trait | Primary Data | Secondary Data |
| Coregonus lavaretus | Egg | Egg size after water-hardening | 2.98 mean diameter of fertilized egg | 2.98 mm |
| Coregonus lavaretus | Egg | Egg adhesiveness | Slightly adhesive and stick to each other | Adhesive |
| Coregonus lavaretus | Egg | Incubation time | 45-125 [340 degree days [At 2.7°C], 420 [4.9°C] and 363 [7.9°C]] | 85.0 days |
| Coregonus lavaretus | Egg | Temperature for incubation | 4-6 [Total mortality occurred at 10°C, and a very high mortality prior to, and during hatching in those at about 8°C] | 5.0 °C |
| Coregonus lavaretus | Egg | Degree-days for incubation | 340 [At 2.7], 420 [4.9°C] and 363 [7.9°C] | 340.0 °C * day |
| Coregonus lavaretus | Female | Age at sexual maturity | 4 [Female] | 4.0 year |
| Coregonus lavaretus | Female | Length at sexual maturity | 27.9 | 27.9 cm |
| Coregonus lavaretus | Female | Weight at sexual maturity | 0.207 | 0.21 kg |
| Coregonus lavaretus | Male | Age at sexual maturity | 3 [Male] | 3.0 years |
| Coregonus lavaretus | Male | Length at sexual maturity | About 24.0 | 24.0 cm |
| Coregonus lavaretus | Male | Weight at sexual maturity | About 0.127 | 0.13 kg |
| Coregonus lavaretus | Spawning conditions | Spawning season | From 15 th January to 15 February | ['January', 'February'] |
| Coregonus lavaretus | Spawning conditions | Spawning period duration | 4 [From 15 January to 15 February] | 4.0 weeks |
| Coregonus lavaretus | Spawning conditions | Spawning depth | Less than 7.6 m | 7.6 m |
| Coregonus lavaretus | Spawning conditions | Spawning substrate | The bottom was found to consist of a witish clay covered by a layer of sand. There were a few scattered stones and patches covered with a growth Fontinalis antipyretica [Schelly eggs were found round the stones, on the sand and more plentifully on and amongst the weed] | Phytophils |