Abstract
Fish farming is a rapidly growing production worldwide, where it covers nearly 50% of fish inputs for human consumption. Releases to the natural environment are also an important issue, especially as they are visible and quantifiable, being emitted directly into the water.The physicochemical analyzes of the various Oued Er-Rbia points (ES, P1, P2, P3 and E4) show that the physico-chemical quality of the water downstream of the OumEr-Rbia magnification station shows no signs of deterioration of the receiving releases.Fish farming effluents are known to deteriorate the quality of freshwater and the excessive presence of nitrogen and phosphorus in the water leads to eutrophication of the environment. This is not the case at the Oum Er-Rbia station, but it is crucial to develop food formulations that cause the least amount of nitrogen and phosphorus released into the environment.
Highlights
Breeding Fish stations face major challenges, the most important of which is the reduction of the negative impacts of discharges on the environment
Station of Oum Er Rbia located on the left of the Oum Er-Rbia river, the latter are fed by a water table crossing salt soils
Its development depends on a supply of good quality water, with good physical properties and chemical properties and free from toxic and microbiological products that can play a role as vectors of pathogens responsible for the devastating diseases of fish production (Guyennet, 2000)
Summary
Breeding Fish stations face major challenges, the most important of which is the reduction of the negative impacts of discharges on the environment. It is mainly a sustainable development of the industry through clean practices in line with recommended regulations. The negative environmental impacts of aquaculture are very numerous, but the most worrying is the eutrophication of fish receiving effluents from aquaculture farms (Persson 1991, Correll 1998, Ouellet 1999 and Vandenberg 2001). At the exit of fish farms, quality standards for rejected water are imposed They constitute limits for the size of the breeding and the possibilities of production. The treatment of discards leaving fish farms contributes to the reduction of the impacts of livestock effluents
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