Yunnan Dali official responds to the phenomenon that the fish population of the Xi'er River jumps out of the water frequently: the silver carp gathers to lay eggs
China News Service, Kunming, June 16 (Du Xiaoxiao) On June 15, the Dian, Xi'er River, Dali, Yunnan, frequently saw fish jumping out of the water, attracting a large number of citizens to watch and fish. On the 16th, the Dali Erhai Conservation Administration responded that the phenomenon was caused by fish gathering and spawning in the waters near the Xi'er River, coupled with the recent changes in weather, high temperature, reduced air pressure and dissolved oxygen, etc. Conditioned fish jump out of the water at high density.
The picture shows the screenshot of the official Weibo of Dali Erhai Protection Administration.
The Dali Erhai Conservation Administration announced on the 16th that on the afternoon of June 15th, there were frequent fish jumping out of the water in the waters near the Xi'er River. The Dali Prefecture and the municipal Erhai Management Department promptly organized the Aquatic Institute of the Chinese Academy of Sciences and the Shanghai Jiaotong University Yunnan ( Dali) Research Institute, Dali University, Dali Prefecture Fishery Workstation and other units experts rushed to the scene to carry out water quality testing, sampling and dissection, research and analysis, law enforcement patrol and other work.
According to the report, after the on-site water quality sampling and testing, the water quality indicators in the fish jumping area were normal. Most of the jumping fish at the scene were silver carp, with a habit of living in groups. Sampling and anatomy showed that the fish groups were large and all reached sexual maturity. Affected by the ecological outflow of the Erhai Lake, fishes gathered and spawned in the waters near the Xi'er River, coupled with the recent changes in weather, high temperatures, reduced air pressure and dissolved oxygen, etc., the fishes that reached the breeding conditions jumped out at high density. water surface.
The report also stated that the release of silver carp is an effective way to carry out biological management in the Erhai Lake area. The silver carp, as a key fish species for the proliferation and release of the Erhai Lake and the ban on fishing in the lake, mainly feeds on algae, which has the effect on the prevention and control of algae in the Erhai Lake and the improvement of water quality. Active role, calling on the masses to observe fish in a civilized manner and prohibit fishing.
In the next step, the administrative departments of Erhai and Dali Prefectures will continue to do well in observation and research work, and promptly publish relevant information.
It is reported that the Xi'er River runs through the east and west of the Dali urban area. The river is the only estuary of the Erhai Lake and eventually flows into the Lancang River. (Finish)