Wegner, A., Ostaszewska, T. and Rożek, W., 2009. The ontogenetic development of the digestive tract and accessory glands of sterlet (Acipenser ruthenus L.) larvae during endogenous feeding. Reviews in fish biology and fisheries, 19(4), p.431.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Acipenser ruthenus | Larvae | Full yolk-sac resorption | 7 dph "Gastric glands became visible on the 7 dph. The primary intestine developed into the spiral intestine. At the moment of onset of exogenous feeding the yolk material was completely exhausted" | 7.0 °C * day |