Several Principles for Feeding in Macrobrachium nipponense Aquaculture

The freshwater shrimp (Macrobrachium nipponense) has tender flesh, a delicious taste and high nutritional value, and is one of the aquatic products deeply loved by the general public. In recent years its price has remained high, and market demand is strong. In recent years, Lianshui County has vigorously promoted freshwater shrimp farming, and the freshwater shrimp farming area has reached more than 8,000 mu. Scientific feeding is a key link in raising freshwater shrimp well. In the work of bringing fishery science and technology into households, it is often found that some farmers feed at will, causing some unnecessary waste. Based on years of experience and the actual situation of farming, the author has summarized five principles that should be mastered in feeding freshwater shrimp, for the reference of the broad community of farmers.

1. Scientifically determine the feeding amount: Set up feeding platforms around the pond. When feeding, evenly broadcast the feed along the pond onto the feeding platforms. Two hours after feeding, check the feeding situation of the freshwater shrimp. If there is leftover feed, the feeding amount should be reduced; if there is no leftover feed, the feeding amount should be increased. 2. Feed according to water temperature, weather, water quality and the growth situation of the freshwater shrimp: feed less when the water temperature is below 18°C or above 32°C, and feed more at 25-30°C; feed more when the weather is clear, with gentle wind and warm sun; feed less or not at all when the weather is bad, with continuous overcast rain, muggy weather or a cold snap; when the water quality is fresh and clear and dissolved oxygen is sufficient, the shrimp feed vigorously and normal feeding can be carried out; when the water quality is poor and dissolved oxygen is low, feed less or not at all; when the freshwater shrimp grow vigorously and have no disease, feed appropriately more, otherwise feed less; feed less when the shrimp molt in large numbers, and feed more one day after molting. 3. Feed according to the different growth and development stages of the freshwater shrimp: from after being put into the pond until growing to a body length of 3 cm, generally rely mainly on natural feed, supplemented by feed made from a mixture of ground soybean slurry and crushed small trash fish slurry. When the body length is above 3 cm, rely mainly on artificial feed, combined with soybean cake, rice bran and green feed. 4. The artificial compound feed for freshwater shrimp is best made into granules, and powder form is not suitable. 5. Adhere to the principle of small amounts and many times: generally at 8:00 feed 20% of the daily feeding amount, at 16:00 feed 20%, and at 20:00 feed 60%.