Alsafy Mohamed A M, Bassuoni Naglaa F, Hanafy Basma G
Anatomy and Embryology Department, Faculty of Veterinary Medicine, Alexandria University, Egypt.
Microsc Res Tech. 2018 Aug;81(8):878-886. doi: 10.1002/jemt.23050. Epub 2018 May 8.
Bagrus Bayad (Forskal, 1775) is a bottom feeder fish feeds on different food items. Its oral cavity anatomy has many types of teeth adapted to the capacity and varieties of feeding. The aim of the present study was to use the gross anatomy and scanning electron microscopy to identify the anatomical characteristic, especially of the teeth and taste buds distributed on the roof and floor of the oropharyngeal cavity. The results clarified that Bagrus Bayad has two types of teeth; curved pointed and blunt teeth of different sizes. The teeth appeared on epithelial protrusions. The pharyngeal region had upper and lower pharyngeal teeth, the upper arranged into two oval prominences while the lower ones arranged into two triangular areas. The higher number of the pointed teeth is prove the carnivorous nature of the Bagrus Bayad. Three types of taste bud (I, II, & III) were found in the oropharyngeal cavity. The tongue present in the floor and free from teeth and characterized by the presence of taste bud type I and II. Many microridges of different arrangement observed on the surface epithelium of oropharyngeal cavity. The upper and lower valve characterized by the microridges, pores and taste buds. The knowledge of the nature of the oropharyngeal cavity of the Bagrus Bayad helps in identifying new and better methods for feeding in aquaculture.
巴氏非洲鲶鱼（福斯科尔，1775年）是一种以不同食物为食的底栖鱼类。它的口腔解剖结构有多种类型的牙齿，以适应摄食的能力和种类。本研究的目的是利用大体解剖学和扫描电子显微镜来识别其解剖特征，特别是口咽腔顶部和底部分布的牙齿和味蕾。结果表明，巴氏非洲鲶鱼有两种类型的牙齿；弯曲的尖牙和不同大小的钝牙。牙齿出现在上皮突起上。咽部有上、下咽齿，上咽齿排列成两个椭圆形隆起，下咽齿排列成两个三角形区域。尖牙数量较多证明了巴氏非洲鲶鱼的肉食性。在口咽腔中发现了三种类型的味蕾（I型、II型和III型）。舌头位于底部，没有牙齿，其特征是存在I型和II型味蕾。在口咽腔的表面上皮上观察到许多排列不同的微嵴。上下瓣膜的特征是有微嵴、小孔和味蕾。了解巴氏非洲鲶鱼口咽腔的性质有助于确定水产养殖中更好的新投喂方法。
