唐鱼脑的组织形态学观察

应用光镜技术观察了唐鱼(Tanichthys albonubes)脑的形态学和组织学结构。结果表明,唐鱼脑基本结构与多数硬骨鱼类相一致,包括端脑、间脑、中脑、小脑及延脑五部分,端脑由嗅囊、嗅叶和大脑构成。脑的组织形态学特点为:嗅叶及嗅囊分化较明显,大脑呈长椭圆状,仍保留鲤科(Cyprinidae)鱼类脑的原始特征;间脑背面具一松果体,腹面中央有一心形漏斗,前端连接呈鸡心形的脑垂体;中脑视叶膨大,与视觉发达相关;小脑发达,与其活跃的生活习性相适应;延脑前部稍稍隆起。此外,对唐鱼脑保持硬骨鱼类较原始的结构特点及其生态学意义进行了探讨。

Observation on the Morphology and Histology of the Brain in Tanichthys albonubes

Morphology and histology of the brain were investigated with light microscopy in Tanichthys albonubes.The results indicate that the brain can be divided into five distinct parts: telencephalon,diencephalon,mesencephalon,cerebellum and myelecephalon,which is similar to the other teleosts.Telencephalon consists of the rhinencephalon,olfactory lobe and cerebrum.The olfactory lobe and rhinencephalon have differentiated and the cerebrum is long ellipse in shape,remaining the original characteristics of cyprinid fish.The conarium is located at the backside of the diencephalons,and the infundibulum,connecting with the hypophysis,is located at the abdomen of diencephalons.Correlated with its developed optic function,the mesencephlon is the biggest part.The myelencephalon has an apophysis at foreside.Thus,the brain of T.albonubes remains quit many original characteristics of teleosts.The ecological significance of T.albonubes brain structure is discussed in this paper.