Zhang Ren-Yi, Li Guo-Gang, Zhang Cun-Fang, Tang Yong-Tao, Zhao Kai
Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810001, China.
Dongwuxue Yanjiu. 2013 Aug;34(4):387-91. doi: 10.11813/j.issn.0254-5853.2013.4.0387.
Gill morphologies of two subspecies of Gymnocypris przewalskii (Gymnocypris przewalskii przewalskii and Gymnocypris przewalskii ganzihonensis) in different habitats were analyzed under scanning electron microscope. Results indicated that G. p. przewalskii had numerous long and dense-lined gill rakers while G. p. ganzihonensis had few short and scatter-lined gill rakers. There were no significant differences in distance between gill filaments (DBF) and distance gill lamella (DBL) between the two subspecies, but gill filaments of G. p. przewalskii were longer than in G. p. ganzihonensis. The electron microscopic study indicated that the pavement epithelium cells of G. p. przewalskii were well defined as irregular ovals, but were hexagonal in G. p. ganzihonensis. Moreover, G. p. przewalskii had more chloride cells than G. p. ganzihonensis, and mucous cells were only found on the surface of gill filaments of G. p. przewalskii. The morphological differences between the two subspecies of G. przewalskii are adaptations to their corresponding diets and habitats.
在扫描电子显微镜下分析了不同栖息地的两种青海湖裸鲤（青海湖裸鲤指名亚种和青海湖裸鲤甘子河亚种）的鳃形态。结果表明，青海湖裸鲤指名亚种有许多长且排列密集的鳃耙，而青海湖裸鲤甘子河亚种的鳃耙少且短、排列稀疏。两个亚种的鳃丝间距（DBF）和鳃小片间距（DBL）没有显著差异，但青海湖裸鲤指名亚种的鳃丝比青海湖裸鲤甘子河亚种的长。电子显微镜研究表明，青海湖裸鲤指名亚种的扁平上皮细胞呈不规则椭圆形，边界清晰，而青海湖裸鲤甘子河亚种的则呈六边形。此外，青海湖裸鲤指名亚种的氯细胞比青海湖裸鲤甘子河亚种的多，并且黏液细胞仅在青海湖裸鲤指名亚种的鳃丝表面发现。青海湖裸鲤两个亚种之间的形态差异是对其相应饮食和栖息地的适应。
