哲罗鱼消化系统的解剖学研究

 通过对哲罗鱼〖WTBX〗Hucho taimen〖WTBZ〗的消化系统进行解剖观察。描述了与摄食有关的齿、舌和鳃耙的形态学特征；测量了体长、头长、吻长、口裂宽、口腔长。对哲罗鱼胃的形态、幽门盲囊、肝、胰脏、胆囊进行了描述；测量了食道长、胃长、肠长、消化道长；并计算了有关比值。结果表明：哲罗鱼的消化道具有典型的肉食性鱼类消化道特点，口裂较大，口咽腔长/头长为062，,肠较短，肠长/体长为069，食道、胃、肠壁内突形成明显的粘膜皱褶。具有不分叶肝脏和线型的胰脏。同时对消化道分段、摄食习性和消化系统形态结构特点进行了探讨。

Digestive System Anatomy of Hucho tai men

To observe anatomy of the Hucho tai men digestive system, describe the morphological characteristics of the teeth, tongue and gill rakers which were related with feeding; measurement of body length, head length, snout length , aperture of mouth breadth, mouth length. The shape of Hucho tai men stomach, pyloric caeca, liver, pancreas, gallbladder were described; the lengths of esophagus, stomach, intestine and digestive tract were measured; and the relevant ratioes were calculated. The results showed that: The Hucho tai men digestive tract had typical characteristics of the carnivorous fish digestive tract , aperture of mouth was big, cavum oropharyngeum length / head length was 0.62, intestine was shorter, intestinal length / body length was 0.69, a clear mucous membrane folds were shaped in the inner process of esophagus 、 stomach and intestinal walls. Its liver did not divide into mala and the pancreas existed by the form of line. Meanwhile, the section of the digestive tract 、 the feeding habits and morphosis of the digestive system were discussed.