Question 9200 — biodiversity

Summary

Mr. Thierry Tesson draws the attention of the Minister of Ecological Transition, Biodiversity, Forests, Sea and Fisheries to the worrying proliferation of wean catfish (Silurus glanis) in the aquatic environments of the 17th district of the North. This predatory fish, native to Central Europe, massively and quickly colonizes the region's rivers, canals, marshes and bodies of water. In Douaisis, the valley of the Scarpe, the Sensée canal, the marshes of Flers-en-Escrebieux, the bodies of water of Courchelettes and Raimbeaucourt, but also in the communes of Arleusis, at the heart of the network of wetlands and confluences. Everywhere, those working in the field are seeing an explosion in catfish populations with worrying consequences for the balance of aquatic environments. Catfish, in the absence of natural predators as adults, exerts strong and multifaceted predatory pressure: fish, amphibians, aquatic birds and even small mammals. Its uncontrolled proliferation contributes to unbalancing ecosystems and endangering fragile species, notably the European eel (Anguilla anguilla), already classified as endangered. The waters of the district are today literally infected by this species whose progression seems to be out of control. of control. Fishermen and nature protection associations are sounding the alarm. It is therefore urgent to act to select, isolate and slow down the development of catfish in sensitive areas, particularly in the marshes and confluences of the Arleux sector. He therefore asks what measures are envisaged to strictly regulate the management of catfish, particularly in areas with high ecological value. such as Arleusis, and if sampling, scientific monitoring and targeted regulation programs are planned in conjunction with the French Biodiversity Office, water agencies and local structures. He also questions the way in which the State intends to support local authorities, river unions, associations and fishing federations faced with this proliferation which seriously threatens biodiversity and the balance of the aquatic environments of the district.

Machine translation from French. The official text remains authoritative.

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