Vollestad, L.A. and Lillehammer, T. (2000) Individual variation in early life-history traits in brown trout. Ecology of Freshwater Fish, pp. 242-247
| Species | Development state | Trait | Primary Data | Secondary Data |
| Salmo trutta fario | Egg | Egg size after water-hardening | The egg size at 2 days post-fertilization varied from 5.78 ±0.29 and 6.41 ± 0.28 | 5.78 mm |
| Salmo trutta fario | Egg | Temperature for incubation | Decrease from 7 to 4°C | 7.0 °C |
| Salmo trutta fario | Egg | Degree-days for incubation | From 425.6 to 437.3 | 425.6 °C * day |
| Salmo trutta fario | Larvae | Initial larval size | 14.5 and 16.2 [Size at hatching] | 14.5 mm |
| Salmo trutta fario | Larvae | Temperature during larval development | 7 | 7.0 °C |
| Salmo trutta fario | Larvae | Full yolk-sac resorption | 561 to 752 [Degree-days, life span after hatching, without external food] | 561.0 °C * day |