Sayed Alaa El-Din H, Mahmoud Usama M, Essa Fatma
Department of Zoology, Faculty of Science, Fish Biology and Pollution Lab, Assiut University, Assiut, Egypt.
Microsc Res Tech. 2019 Apr;82(4):443-451. doi: 10.1002/jemt.23185. Epub 2019 Jan 16.
The microstructure of the oral cavity and alimentary canal of herbivorous fish Siganus rivulatus collected from the Red Sea were investigated by using scanning electron microscope (SEM). The results showed that S. rivulatus has three types of teeth, tri-cusped, bi-cusped, and papilliform. A taste bud (Type I) was recorded in the oropharyngeal cavity. Characteristic styles of microridges on the cell's surface inside the buccal cavity were recorded. Also, the distribution of the mucous cells in the lining of the mouth cavity, alimentary canal was observed. Mucosal folds along the distinct parts of alimentary canal, showed characteristic pattern which was complex in the intestinal mucosa. The results concluded that there are characteristic microstructures according to feeding habitat compared with other bony fishes.
利用扫描电子显微镜（SEM）对从红海采集的草食性鱼类黄斑蓝子鱼口腔和消化道的微观结构进行了研究。结果表明，黄斑蓝子鱼有三种类型的牙齿，即三尖齿、双尖齿和乳头状齿。在口咽腔中记录到一种味蕾（I型）。记录了颊腔内细胞表面微嵴的特征样式。此外，还观察了口腔和消化道内衬中黏液细胞的分布。沿消化道不同部位的黏膜褶皱呈现出特征性模式，在肠道黏膜中较为复杂。结果表明，与其他硬骨鱼类相比，根据摄食生境存在特征性微观结构。
