Experts call for the protection of ecological environment

Introduction: on August 22 (reporter Zhang Shangwu, correspondent Wang Xuguang) the monitoring results of fishery resources in the lake area announced by the Provincial Bureau of animal husbandry and Fisheries today show that the migratory and semi migratory fish resources in Dongting Lake have decreased sharply, showing a trend of low value, low age and miniaturization Relying on 8 fishery environment monitoring stations, Dongting Lake fishery resources have been monitored for many years Compared with the monitoring results in recent years, the degradation trend of fish population is obviously reflected The proportion of semi migratory fish such as "four big fish" in the fishing volume decreased from 30% to 10%, and the proportion of small settled wild fish increased to about 80%, reflecting the decline of economic value of Dongting Lake fishery resources Many rare animals are on the verge of extinction, and important protected species such as Baiji, cochineal fish and eel are hard to find, reflecting the decline of water biodiversity In addition, the main economic fish tend to be younger and smaller The juvenile fish in that year has become the main fishing target, the fish supplement population has been damaged, and the sustainable utilization of fishery resources has been seriously threatened According to the analysis of experts, on the one hand, the change of fish population in the lake area is due to the influence of overfishing, sediment deposition and other factors, as well as water pollution, engineering construction and other factors, which damage these precious fishery resources The replenishment of migratory fish resources in Dongting Lake depends on the Yangtze River and the four rivers of Xiang, Zi, yuan and Li These rivers build dams and ignore the supporting migration channels The cities and towns along the lake are dense, there are many enterprises, and the annual wastewater discharge is large In addition, the drug pollution left over by killing reed and poplar, the spawning ground of settled fish is damaged Fishery experts called on all parties concerned to work together to create a good ecological environment for fish in the lake area The environmental assessment and fishway construction should be done well for the engineering construction in the lake area; it is strictly forbidden for the towns and enterprises along the lake to discharge pollutants beyond the standard Under the guidance of the fishery department, all areas along the lake should do a good job in the artificial propagation and release of fish, maintain the ecological balance of the water area, and ensure the continuous growth of Mother Lake in Sanxiang.