关键词: 长江上游, 生境修复, 人工鱼巢, 增殖效果

Abstract: Artificial fish nest made of bamboo poles and aquatic plants were set up in Xiangjiaba reservoir area ,the Jiangjin section of the Yangtze river and the Chishui city of the Chishui river from February to May in 2017. The results showed that the number of adhesive eggs reached 11.03 billion,5.67 billion and 9.08 billion. All of the adhered fish eggs were identified as Cyprinus carpio and Carassius auratus by species identification. It can proliferate 37.502 0 million,96.750 5 million and 24.608 1 million fish larvae respectively and attract other fish larvae. Owing to the hatching of adhesive eggs and the rotting of egg membrane,dissolved oxygen concentration of local water in artificial fish nest decreased,ammonia nitrogen concentration,chemical oxygen demand concentration and suspended solids concentration increased slightly,but the water quality index was still below the limit of class III of surface water.

Key words: the upper reaches of the Yangtze river, habitat restoration, artificial fish nest, effect evaluation of propagation