Ostaszewska, T. and Wegiel, M. (2002) Differentiation of alimentary tract during organogenesis in larval asp (Aspius aspius L.). Acta Scientiarum Polonorum - Piscaria, pp. 23-24
| Species | Development state | Trait | Primary Data | Secondary Data |
| Aspius aspius | Larvae | Full yolk-sac resorption | The yolk sac was completely absorbed on day 11 post hatch | 11.0 °C * day |
| Aspius aspius | Larvae | Onset of exogeneous feeding | Between days 3 and 5 post hatch, the intestine opened at both ends and lined with columnar epithelium. Signs of digestion and lipid absorption by enterocytes were observed on day 5, while protein absorption started on day 7 of the larval development. | 3.0 °C * day |