梵净山小口白甲鱼消化系统组织学研究

Histological Study of Digestive System of Onychostoma lini in Fanjingshan Mountain

采用HE染色法研究了小口白甲鱼(Onychostoma lini)消化系统的组织结构特点。结果表明,小口白甲鱼体型小,口小下位,下颌具角质边缘。食道和肠道由黏膜层、黏膜下层、肌层和浆膜层组成。肠道细而长,比肠长(肠长与体长之比)大于2.0;小口白甲鱼的口咽腔上皮细胞中有杯状细胞排列,鳃耙细密发达。食道的输送食物能力和肠的消化吸收能力较强,小口白甲鱼属于以刮食为主的偏植食性鱼类。其消化道组织结构与食性一致。

HE stain was performed to study the characteristics of the histological structure of the digestive system of Onychostoma lini. The results showed that O. lini is a small size fish species, its mouth is very small,and the mandibular is a horny edge.The walls of oesophagus and intestine based on their length, consist of mucosa,submucosa, muscular coat, and serosa.Intestine was thin,intestine length/body length2.0; Some goblet cells scattered throughout the epithelium of cavum, Gill rakers are slender and densely lined.The ability of food delivery of esophagus and digestive and absorptive ability of intestine was almost very well. These histological features indicate that Onychostoma lini was herbivorous fish. The histological structures of digestive tracts is consistent to feeding habits.