黄斑篮子鱼和金钱鱼鳃的扫描电镜观察

Scanning Electron Microscopy of the Gill in Rabbitfish Siganus oramin and Butterfish Scatophagus argus

对两种鲈形目鱼类黄斑篮子鱼(Siganus oramin)和金钱鱼(Scatophagus argus)的鳃结构进行扫描电镜观察。结果表明,黄斑篮子鱼和金钱鱼鳃的表面结构及微细结构与其他硬骨鱼类基本相似,鳃丝表面都具有规则或不规则分布的环形微嵴、沟、坑、孔等结构。黄斑篮子鱼的鳃片中部鳃丝表皮有大量凸起,而端部鳃丝表皮的凹凸程度明显较低,黄斑篮子鱼的鳃小片高度较金钱鱼鳃小片高。黄斑篮子鱼和金钱鱼鳃上皮的扁平上皮细胞、氯细胞和黏液细胞的形态结构及数量分布存在细微的差异。黄斑篮子鱼鳃片鳃丝的端部和中部表面有黏液细胞,金钱鱼鳃丝表面的黏液细胞很难观察到,与大多数淡水鱼类相似。黄斑篮子鱼鳃丝表面分布的氯细胞数量多于金钱鱼,这可能与两种鱼生活环境、生活习性的长期演变相关。

The gills of Rabbitfish Siganus oramin and Butterfish Scatophagus argus were observed by scanning electron microscopy. The surface architecture and uhrastructure of gill filaments and secondary gill lamellaes of S. oramin and S. argus were similar to other teleosts. The gills from both S. oramin and S. argus showed regular and irregular circular microridges, indentations, micropits and crevices. The surface architecture of gill filaments in middle part of gill lamellae of S. oramin was concave, but that of other parts was smooth. The secondary gill lamellaes of S. oramin were higher than those of S. argus. The morphology and distribution of pavement cells, mucous cells and chloride cells on gill epithelia of S. oramin and S. argus had minor difference. Mucous cells were found on the surface of gill filaments of top and middle parts in S. oramin, while few were observed in S. argus, similar to other freshwater fish. The number of chloride cells on the gill filaments of S. oramin was more than that of S. argus, This may be related to their different inhabitation environments and long-term evolution.