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Feeding Management of Adult Fish after White Dew
After the White Dew season, fish diseases gradually decline, and adult fish enter a period of rapid growth. Proper feeding and management during this time play a crucial role in ensuring a successful fish harvest.
First, timely feeding is essential. During this phase, water temperatures are ideal, metabolism is high, and fish have strong appetites. The general rule is to feed as much as the fish can consume, but in a controlled and appropriate manner. From late September to late October, grass feed should make up about 20% of the annual total feed, fine materials over 30%, and shellfish more than 40%. If there's a shortage of grass or shellfish, it’s advisable to supplement with more concentrates to ensure the fish are well-fed, grow quickly, and maintain good health.
Second, follow the "four determinants" principle: feed must be fresh and palatable, and feeding should be done at fixed times, locations, with consistent quality and quantity. Adjust the amount of feed based on water conditions, weather, and fish behavior to ensure that the fish eat adequately, efficiently, and maximize feed utilization.
Third, maintaining clean and fresh water is critical. With increased feeding and higher metabolic activity, waste accumulation can quickly degrade water quality. To prevent this, regularly add fresh water and use oxygen aerators. The frequency and volume of water changes depend on the current water quality, and it's recommended to run the aerator during midday on sunny days. Keeping the pond water clear, cool, and rich in dissolved oxygen (above 5 mg/L) creates an optimal environment for fish growth.
Fourth, daily management is key. Check the pond three times a day—early morning, midday, and evening. If you notice fish floating at the surface or other unusual behaviors, take immediate action. Remove leftover bait and any dead fish promptly to maintain cleanliness. Also, keep detailed records of pond activities to track progress and refine breeding techniques over time.
By focusing on these four areas—feeding, water quality, daily monitoring, and record-keeping—fish farmers can significantly improve productivity and ensure a healthy, profitable fishery.