摘要
罗非鱼内耳器官结构与典型硬骨鱼的内耳结构一致。球状囊呈椭圆体状，其耳五充满整个囊体，耳石上有明显的中央沟，中央沟在形态上与球状囊听斑一致；听囊呈圆形，听囊耳五约占整个听囊一半，耳石较薄且较透明，有明显外缘区和中央区之分；椭圆囊呈不规则椭球体状，其耳石占椭圆囊的较小部分，耳石表面粗糙。罗非鱼耳石膜为一层胶质膜，位于耳石和听斑之间，并触及所有毛细胞，膜有大量小孔，小孔处恰为毛细胞的纤毛束伸入，纤毛束透过小孔触及到耳石。扫描电镜观察表明，罗非鱼内耳听斑也由毛细胞和支持细胞组成，听斑表面有大量具一定分布规律的纤毛束。罗非鱼内耳听觉器官主要有三种纤毛束类型：Ｆ＿１、Ｆ＿２和Ｆ＿３型。按照纤毛束的取向一致性，球状囊听斑划分三个区；听囊听斑和椭圆囊听斑均划分两个区。
This paper deals with the morphological structure of the inner ear of anonostariophysine fish, Oreochromis sp,from the lake of Xiamen University,using light andscanning electron microscopy.The results are as follows;1. The structure of the ear in Oreochromis sp. is the same as that of“the typical teleostear”. which consists of three semicircular canals(anterior,posterior and horizontalsemicircular canals)and three otolithic organs(utriculs,lagena and sacculus).Each fish hastwo ears between which no connection was obesrved.The bilateral mirror symmbtry of eachsaccular pair often involves divergence of the anterior ends 25-30°away from thebody-midline.2.The sacculus is particularly large and utricular-shaped, with a single large otolith fil-ling the whole otolithic sac,The saccular otolith is a laterally flattened elipsoid with a deepmedial sulcus with which the sensory epithelium is closely connected.The lagena is generallysmall and round in shape with a small and thin triangular otolith filling only half of thesacculus.The utriculus is irregular in shape. The utricular otolith is also small and has roughsurface,filling only a small part of the sacculus;3.The otolithic membrane is a thin gelatinous structure lying between the macula andthe otolith,contacting all the sensory cellshcluding those in regions not directly“undcf”theotolith.The membrane has a large number of small holes where the ciliary bunddles extendand contact the otolith.4.The results of scanning electron microscopy reveal that the maculae consist of sensoryeells and supporting cells and the surface of the sensory epithelia of each of the otolithic or-gans is distributed with a lot of ciliary bundles in a certain pattern. There are mainly threetypes of three ciliary bundle F_1, F_2 and F_3.in the inner ear organs of the Oreochromissp. Each otolithic macula can be divided into a number of regions within which all the ciliarybundles are morphologically polarized in the same two in lagenar macula and two in utricularmacula,Morphologically,the utricular macula is dish-shaped and has a lateral extension,the lagenar macula is the shape of a fat crescent and the saccular macula is elongate but widerat the rostral than the caudal end, like the shape of a tadpole.
出处
《水生生物学报》
CAS
CSCD
北大核心
1994年第3期215-222,共8页
Acta Hydrobiologica Sinica
基金
国家自然科学基金
关键词
罗非鱼
内耳
超微结构
耳石
听斑
Oreochromis sp,Inner ear,Ultrastructure,Otolith,Macula
