Scientifically grasping the number of feeding
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Feed feeding is one of the key links in aquaculture. Some farmers do not know the amount of feed they feed, and they do not know how to identify the hunger and satiety of fish, which results in low yields, many diseases, and poor economic returns. Here are some of the experiences described briefly below for your reference: 1. Mastering the conventional standard spring water temperature is low, the fish is small, the food intake is small, and when the temperature rises on a sunny day, a small amount of concentrate feed can be put. When the temperature rises above 15°C, the feeding amount can gradually increase, and the daily feeding amount accounts for about 1% of the total weight of the fish. When the water temperature rises to about 20°C in the early summer, the daily feed amount accounts for 1% to 2% of the total body weight of the fish. However, this is also the season of illness. Therefore, proper amount of feed should be given to ensure that the feed is palatable and uniform. When the water temperature rises above 30°C in the midsummer, the fish have a strong appetite and grow rapidly. It is necessary to increase feeding, and the daily feeding amount accounts for 3% to 4% of the total weight of the fish. However, attention should be paid to the quality of feed and prevent the leftovers, and Water quality needs to be adjusted to prevent pollution. In autumn, the weather turns cold and the water temperature is gradually low, but the water quality is still stable. Fish continue to grow and can still increase feeding. The daily feeding amount accounts for about 2% to 3% of the total weight of fish. In winter, the water temperature continues to drop, and the food intake of fish gradually decreases. However, when the weather is fine, it is still possible to feed a small amount to maintain the fish's fatness. 2. Differentiating farmed species Different species of fish have different potential growth abilities and different nutrient requirements for growth, so their feeding rates are also different. For example, the feeding rate of grass carp at around 25°C is 5% to 9%, and that of carp is 2%. The feeding rate of the same species is not the same, such as the feeding rate of Nile tilapia weighing 100 grams is 1.6%, while the same weight of Mozambique tilapia is 2.4%. 3. After grasping the feeding time and feeding a certain amount of feed according to the conventional standard, the time for the fish to eat is less than 2 hours, which indicates that the feeding is insufficient and should be appropriately increased. If the fish is fed regularly for a longer period of time, the time for eating the fish suddenly decreases to 2 hours, indicating that the fish has gained weight and the feeding standard should be adjusted. Feed the grass, snails, oysters, and other feeds, generally taking 7 hours to 8 hours to eat as a standard. 4. Watch the fish color. The general fertilizer is oily green or tan, and the water color is light in the morning and gradually thickened in the afternoon. The transparency of the water is about 30 cm, indicating that the fat is moderate and can be fed normally; when the transparency is more than 40 cm, the water quality is too thin and the feeding amount should be increased; when the transparency is less than 20 cm, the water quality is too fat, the feeding should be stopped or reduced. . This is particularly evident in the waters of the main eel and eel. When the water quality is too fat, the eel and eel will have large heads, small tails, narrow backs, and inability to swim, and even thin and fragile individuals floating on the water surface. This shows that the plankton in the water is too small. According to the turbidity of the water, the amount of feeding can be determined according to the turbidity of the main squid. For example, the entire pool is turbid and muddy yellow. Excluding heavy rain or man-made reasons, it can be proved that squid swims very infrequently at the bottom of the pool, and the mud is continuously inundated. Due to the turbidity of the water body, it can be determined that the carp is in a state of starvation, and the feeding amount should be increased. 5. Differentiating Feed Proteins Proteins are the most important nutrient necessary for fish growth. Protein content is also a major indicator of fish feed quality. For the same type of fish, feeds with high protein content can be appropriately reduced, while feeds with low protein content should be increased. Because there is no uniform nutrition standard for fish feed, the protein content of fish feed is uneven.