The study of artificial fish nest in the upper reaches of the Yangtze river
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 concentra-tion,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.
the upper reaches of the Yangtze riverhabitat restorationartificial fish nesteffect evaluation of propagation
NETL
NSTL
万方数据
维普
