玛柯河两种鱼类的资源量及分布特征

摘要

A fishery survey was conducted in mainstream and tributaries of the Make River in July, 2013 to evaluate the status of the fishery resoures. Totally, 574 individuals of two species were captured in the survey. The average total length of Schizopygopsis malacanthus chengi and Triplophysa markehensis were 18. 2 cm and 12. 3 cm, respectively. Estimated population of S. malacanthus chengi and T. markehensis in the six tributaries were 42 059 and 42 352, respectively. Ac-cording to the correlation analysis, the densities of the two species were positively correlated with velocity and slope. Mo-reover, the density of T. markehensis showed a negative relationship with water depth.%为了解玛柯河的鱼类资源现状, 2013年7月对玛柯河班玛县境内的干流和支流进行了鱼类资源调查. 共采集大渡软刺裸裂尻鱼(Schizopygopsis malacanthus chengi)和玛柯河高原鳅(Triplophysa markehensis)574尾, 平均全长分别为18. 2 cm和12. 3 cm. 根据河段密度法估算出6条支流内两种鱼的资源量分别为42 059尾和42 352尾.环境因子与鱼类密度的相关性分析的结果显示, 大渡软刺裸裂尻鱼和玛柯河高原鳅的密度与流速和比降呈现正相关, 玛柯河高原鳅的密度还与水深呈负相关.