犀角金线鲃的地理分布及其对穴居环境生态适应的初步研究

 1993～1996年的4年中，对犀角金线鲃的地理分布，栖息环境和洞穴适应进行了初步分析和考察，结果如下：主要分布在云南省罗平县3个不连续分布点，其栖息环境一是间隙性小型湖泊；二是漏斗型地形溶洞的敝露小水体；三是一个干龙潭的雨季出水口。其适应性特征是高度退化的眼，发达的口须和侧线，体表无鳞等。具有特殊意义的是头部后缘向前生出角状突出物—— 一种皮肤保护器，形似犀角。

The Preliminary Invesfigation of Geogrophical Distribution and Elcological Adaptation for Cave Environment of Sinocyclocheilus rhinocerous-A Cyprinid Fish

During four years from 1993 to 1996 the primasy investigation of geographical distribution and inhabital environment and cave adaptatio for Singcyclocheilas rhinocerous have been made. the results as follows. These discoutinnous distributed localities are to be located in Luoping County (hisen), Yunnan province one of the inhabital environment is a small interval lake, another one is to be an open water body of the funnd cave. and the third one is a pool that aeseavior water seasonally. the heavily degenerated eye. devoloped oral barbs and lateral line scale and scaleless on body are the adaptive characters of lightless cave environment. Specially a frontal in tegument projection resemble a rhinocerous horns that originected from the back edge of the head appeared as a protective apparatus adapted for rock knock in darkness water.