关键词: 齐口裂腹鱼, 重口裂腹鱼, 肠道, 内分泌细胞, 免疫组织化学

Abstract: Aim: to study the cell morphology, localization and distribution density of Glu and 5-HT cells in the intestine of Schizothorax prenanti and Schizothorax davidi. Method:by using immunohistochemical methods of SABC, the antisera raised against mammalian hormones. Glu and 5-HT were used to identify and locate the endocrine cells in the gut of Schizothorax prenanti and Schizothorax davidi. Results: the distribution density of Glu cells is higher in the midgut, lower in the foregut and hindgut of S. prenanti;but is high in the foregut and midgut, low in the hindgut of S. davidi. The distribution density of 5-HT cells is the highest in the foregut, less in the midgut, and the lowest in the hindgut of S. prenanti, but in the foregut and hindgut is much higher than that in the midgut of S. davidi. These cells are mainly shuttle-shaped and pyramid-shaped. Conclusion:the distributional and morphology characteristics of these cells is closely related to their feedinghabits and intestine structures.

Key words: Schizothorax prenanti, Schizothorax davidi, intestine, endocrine cells, immunohistochemistry