Bartel, R. and Falowska, B. and Bieniartz, K. and Epler, P. (2005) Dependence of egg diameter on the size and age of cultivated female lake trout (Salmo trutta m. lacustris L.). Archives of Polish Fisheries/Archiwum Rybactwa Polskiego [Arch. Pol. Fish./Arch. Ryb. Pol.], pp. 121-126
| Species | Development state | Trait | Primary Data | Secondary Data |
| Salmo trutta fario | Egg | Egg size after water-hardening | The collected eggs were submerged in water for hardening. […] The mean diameter of the eggs if individual females ranged from 4.08 to 5.85 mm, while in subsequent age groups the mean diameter of ten eggs ranged from 4.45 mm to 5.31 mm in four-and seven-year females | 5.85 mm |