Abstract: Alien fish invasion has become one of the important reasons for the decline of native fish resources in Tibet, but related studies remain scarce. The Yarlung Zangbo River basin is the worst-hit area invaded by alien fish species in Tibet. Alien fish species, such as Carassius auratu and Pseudorasbora parva, are widely distributed in this area, causing serious impacts on native fish resources, aquatic environment, and biodiversity. However, there are limited effective measures to control the alien fish species. We summarized the composition and distribution, transmission and dispersal routes, invasion mechanisms and ecological effects of alien fish species in the Yarlung Zangbo River. We analyzed deficiencies of current measures to control alien fish species. Countermeasures to scientifically prevent and control alien fish species were proposed, aiming to provide basis for elimination of alien fish species in Tibet and to provide reference for the protection of native fish resources and aquatic ecosystems in Tibet.

Key words: Yarlung Zangbo River, fish invasion, native fish resource, aquatic ecosystem, biological diversity.