Precautions for overwintering management of Ooni fish (Tilapia)

The main thing is to strengthen feed feeding. The daily feeding amount is 5%～8% of the fish body weight. The protein content in the feed should be around 30%～35%. The feed formula can use fish meal18℃ and 32℃, and not lower than 12℃. The water temperature must be well controlled when changing water, and the temperature difference must not exceed ±2℃. The overwintering density must be appropriate. Generally, the stocking density can be 15 to 25 fish per cubic meter of water, or 200 fish species below 10 cm; fishing ponds with better conditions can raise broodstock24℃ and 32℃, the Ooni fish can maintain its appetite and insist on feeding in appropriate amounts. It can not only maintain life, but also grow and develop, enhance its physique, and improve its disease resistance. Geothermal water can be mined for overwintering in places with geothermal resources. The method is to drill hot water wells in suitable locations and use insulated pipes to introduce the geothermal water into overwintering pools. The pipes should be buried deep underground to avoid heat dissipation. The overwintering pool area should be more than 5 acres, and the water depth should be 2m or more. At the same time, the temperature and water quality of the geothermal water must be tested to make it suitable for the survival and growth of Ooni fish. In addition, glass greenhouses and greenhouses with solar devices can also be used to overwinter Ooni fish according to local conditions. 3.Adjust water reasonably. In addition, they can also be infected with saprolegnia, schistosomiasis, trichozoa, branchial flagellosis, bacterial gill rot, etc.