Lenhardt, M., Finn, R.N., Cakic, P., Kolarevic, J., Krpocetkovic, J., Radovic, I. and Fyhn, H.J., 2004. Analysis of the post-vitellogenic oocytes of three species of Danubian Acipenseridae. Belgian journal of zoology, 135(2), p.205.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Acipenser ruthenus | Egg | Oocyte diameter | 3.07-0.14 mm | 1.6 mm |
| Acipenser ruthenus | Egg | Egg size after water-hardening | 6.5 ± 0.3 mm | 6.5 mm |