在西北高原的东部边缘地区,秦岭南坡大山的山溪间,生活着许多个体较小的冷水鱼(背黑、腹白、鳞极细小,多为成人的手指大小,疑为高原裸鲤)。它们终年生活在清幽冰凉的溪流中,喜欢清澈、阴冷、溶氧量高的水流环境,春夏秋三季,在浅水中常常可以看见它们活动的踪影,一到冬季,这些冷 In the eastern edge of the Northwest Plateau, mountains and streams of mountains on the southern slope of the Qinling Mountains live with many smaller cold-water fish (dorsal, belly white, very small scales, mostly adult finger size, suspected plateau naked carp) . They live all year round in the clear and cool streams, preferring the clear, cold and high dissolved oxygen flow environment. In the spring, summer and autumn, they can often see the traces of their activity in shallow water. In the winter, these cold