中华乌塘鳢嗅觉器官的形态结构

中华乌塘鳢（Bostrichthys sinellsis Lacepede）样品体长17．0～19．8cm，性成熟鱼性腺为Ⅳ～Ⅴ期，性未成熟鱼性腺为Ⅱ期。取嗅囊切片、染色、固定。分别以扫描电镜和透射电镜拍照。结果显示，中华乌塘鳢具一对纺锤形嗅囊，由前、后鼻孔与外界相通，嗅上皮向嗅囊腔内突起形成10～16个初级嗅板，初级嗅板上有次级嗅板，可增大嗅上皮的表面积。嗅板由嗅上皮和中央髓两部分构成，中央髓主要由疏松结缔组织和毛细血管构成；嗅上皮排列于中央髓的两侧，由多层细胞组成。扫描和透射电镜观察表明：嗅上皮分为非感觉区和感觉区两部分，非感觉区位于嗅板边缘，较薄且平滑，外缘高倍放大呈指纹状或块状结构；感觉区位于中央部位，呈连续分布，细胞种类多样，表层为纤毛非感觉细胞，中上层为纤毛感受细胞和柱状细胞，中卜层为支持细胞，底层为基细胞。纤毛感受细胞为一种双极神经元，树突在上皮表面形成嗅结；轴突则穿过基膜，在固有层内集合成束，形成嗅神经纤维，终止于嗅叶。

Morphology and structure of olfactory organ in Bostrichthys sinensis

Morphology and structure of olfactory organ were systematically investigated by means of histology and electron microscopy in Chinese black sleeper Bostrichthys sinensis Lacepede.The results were as follows: Chinese black sleeper has a pair of fusiform olfactory sacs in front of the eyes;each sac has an incurrent and an excurrent nostril.There are 10-16 primary olfactory lamellae radiating from the wall of olfactory chamber in the fish,longitudinally arranging and paralleling to each other.The primary olfac...