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本文描述了河川沙塘鳢胚胎、仔、稚鱼消化系统的发育过程，对仔、稚、幼鱼的摄食作了较深入的研究。仔鱼开口摄食期为孵化后的2－7天，第10天的仔鱼，卵黄方被完全吸收，属混合性营养类型，混合营养期为孵化后的2－9天。小型枝角类是仔鱼适宜的开口饵料；仔、稚鱼期的主要饵料亦为枝角类，其次为桡足类；幼鱼则转为以小蚯蚓和摇蚊等底栖动物为主要食物。从仔鱼到幼鱼，摄食量逐渐增大。稚鱼昼夜摄食节律变化明显。
This article describes the developmental process of the digestive system of the embryo, larva and juvenile of the sand pond, and further studies on the feeding of young, juvenile and juvenile fish. The larvae feed on for 2-7 days after hatching. On the 10th day, larvae and yolk are completely absorbed, which belongs to the mixed nutrition type. The mixed nutrition period is 2-9 days after hatching. The small cladocalyptus is suitable for larval opening bait; Aberdeen and juvenile main bait also is cladocera, followed by copepod; juvenile is converted to small earthworms and zoobenthos and other benthic animals as the main food. From larvae to juveniles, food intake gradually increased. Juvenile diurnal feeding rhythm changes significantly.