关键词: 重口裂腹鱼, 消化道, 内分泌细胞, 免疫组织化学

Abstract: By using immunocytochemical methods of Strept avidin-biotin-complex(SABC), the antisera was raised against mammalian hormones:gastrin, 5-hydroxytryptamine were used to identify and locate the endocrine cells in the digestive tract of Schizothorax davidi. The result shows that the gastrin positive reactive cells are only distributed in the fore and middle intestines. A large amount of G cells(32.51 number/mm²) are found in the anterior segment of fore intestine. The 5-hydroxytryptamine positive reactive cells are located in the different parts of intestine, most in the anterior segment of fore intestine(24.25 number/mm²), less in the posterior segment of hind one(23.56 number/mm²), lowest in the middle one(15.51 number/mm²). The relationship between the morphological characteristics and their physiological functions of these endocrine cells are discussed.

Key words: Schizothorax davidi, digestive tract, endocrine cell, immunocytochemistry