Bartel, R. and Bieniarz, K. and Epler, P. (1999) The relationships between egg size, and the size and age of Danube salmon (Hucho hucho L.) females. Arch. Ryb. Pol./ Arch. Pol. Fish, pp. 221-226
| Species | Development state | Trait | Primary Data | Secondary Data |
| Hucho hucho | Egg | Oocyte diameter | 3.48-7.64 [Not specified] | 5.56 mm |