| Ecological experiment was conducted to study the allometric growth of Spualiobarbus curriculus larvae and juveniles from Zhaoqing reach of Pearl River. The results showed that after the first feeding, the organs associated to swimming, feeling and feeding of larvae differentiated rapidly, and exhibited allometric patterns. Head length, tail length and head height exhibited positive allometric growth, trunk exhibited negative allometric growth before the growth inflexion point at the age of 20 days after opening mouth, while after the growth inflexion point,trunk exhibited positive allometric growth. Body height exhibited positive allometric growth both before and after the growth inflexion point at 18 days after opening mouth. For dimensions of organs in head, the growth inflexion points of rostrum length, eye diameter and post-eye head length were at the age of 23, 19 and 16 days. For swimming organs, dorsal fin, pelvic fin and anal fin exhibited positive allometric growth both before and after the growth
inflexion point at 18, 19 and 17 days after opening mouth; but tail fin exhibited positive allometric growth before the growth inflexion point at the age of 14 days feeding, after the growth inflexion point, tail fin exhibited negative allometric growth. The fast development of swimming,feeling, feeding and other organs in exogenous nutrition larvae of S. curriculus, let larval survival ability at the early stage increase in the shortest time, and had important ecological significance to adapt the complex external environment. |
