In the course of fish farming, broodstock often suffer from injuries, which can lead to infections or even death if not properly managed. To ensure their health and successful spawning, farmers should focus on several key areas. First, regularly check the spawning condition of the broodstock. If they are ready to spawn, gently press the abdomen to see if eggs come out. If the genital pores are blocked, carefully unblock them using a small needle to prevent water swelling. Second, place the broodstock in a temporary holding pond. Add 30-50 grams of furazolidone per acre, and repeat this treatment once a week for 3 to 5 times. During this period, feed them with food baits like soybean cake or oyster cake. For grass carp, offer sprouted grains, green vegetables, and some green bait, but avoid overfeeding or fertilizing. Third, treat any wounds promptly. For skin injuries, apply a 1% solution of malachite green and potassium permanganate, along with antibiotic ointments such as sulfonamide, cyanine, or streptomycin. In severe cases, inject them with health supplements or antibiotics. Fourth, maintain good management practices by keeping the water clean and well-oxygenated. This helps stimulate the appetite of the broodstock and speeds up their recovery. Fifth, during handling and spawning, use fine-mesh nets, wear long clothing, and keep the lines soft to reduce physical damage. When performing artificial insemination, work quickly and keep the fish moist. Transport them in water, and only move an appropriate number of fish at a time. Unstable or uncertain fish may not spawn effectively, so careful selection is essential. By following these steps, farmers can improve broodstock survival rates and increase the success of breeding efforts.
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