A total of 40 specimens of the genus Schizothorax (Cyprinidae: Schizothoracinae), including 10 matured males, 19 matured females and 11 juveniles, were captured from the Kirong Tsangpo River in China, which is located in the southern slope of the Central Himalayas. These specimens are identified as Schizothorax richardsonii (Grey, 1832) based on morphological characters and molecular analyses using mitochondrial Cyt b gene sequences. The Kirong population of S. richardsonii is relatively isolated from other populations in the Himalayas and has low genetic diversity. This is the first record of the genus Schizothorax fish in rivers of the Central Himalayas in China. As S. richardsonii is a vulnerable species on the IUCN Red List, a protection plan should be conducted to reduce the impact of anthropogenic disturbance by monitoring the natural population dynamics and assessing the ecological determinants of its distribution.
裂腹鱼属 (Schizothorax)鱼类是适应青藏高原环境的鲤科鱼类，广布于中亚、青藏高原及其邻近的山区，但从未在中国中喜马拉雅地区有分布记录。本文首次发现该属鱼类在中国中喜马拉雅山南坡河流吉隆藏布分布。形态学和分子序列分析表明这些标本被鉴定为理氏裂腹鱼(S. richardsonii (Gray，1832))。裂腹鱼属鱼类在中国中喜马拉雅地区的发现，对研究喜马拉雅河流环境演变具有重要意义。线粒体cyt b基因序列分析表明理氏裂腹鱼吉隆藏布种群遗传多样性低，且与喜马拉雅地区其他种群存在隔离。理氏裂腹鱼已被列入世界自然保护联盟 (IUCN) 红色名录 (UV)。吉隆种群分布区狭窄，数量稀少，亟待开展种群动态监测和生境需求评估以及栖息地保护等工作。.
Keywords: Central Himalayas; China; Schizothorax; geographical population; trans-border river.
© 2023 Fisheries Society of the British Isles.