Feed feeding of Pelteobagrus fulvidraco cultured in cage

(1) types of feed

(1) the basic arrangement of feeding during the whole process. In fact, the feed of cultured Pelteobagrus fulvidraco is exactly the same as that of Pelteobagrus fulvidraco in pond. except for compound feed, red worms and water earthworms can be used as feed in the cage of first-class fish, and the fish paste mainly made of small miscellaneous fish can also be fed. In the second-class fish cage, fish paste and formula feed can be fed. Grade 3 and 4 cages can be based on compound feed.

(2) the formula feed should be prepared according to the nutritional needs of Pelteobagrus fulvidraco at different growth stages. Cai Yanwei of Hubei Fisheries Research Institute preliminarily studied the feed formulations of four different stages, which can be used as raw materials for compound feed of Pelteobagrus fulvidraco, including fish meal, silkworm pupa meal, blood meal, meat and bone meal, yeast, soybean meal, rapeseed meal, wheat bran, secondary meal (also known as tail meal), corn meal, wheat, and fresh fish sauce, mussel meat sauce and viscera of livestock.

If fish paste and plant powder are mixed to form a ball of feed, it can be fed directly. However, in this case, it must be taken into account that the protein content in the feed is not less than 38% during the fry period and not less than 35% during the adult period.

(2) feeding technology

1. Set up a feed table generally set up a feed table at the bottom of the inner box in the cage to directly feed the bait on the feed table; when starting to switch to food, first put the feed on the table, a small number of times, induce feeding, and the unfinished feed must be cleared before feeding fresh materials. The feed table can be made of iron or wood.

two。 The daily feeding amount is mainly determined according to the body weight and water temperature of Pelteobagrus fulvidraco. Compared with the artificial feed of Pelteobagrus fulvidraco cultured in pond, there is a small amount of waste in the feed of Pelteobagrus fulvidraco cultured in cage. As a result, the daily feed intake is about 10% higher than that of pond farming. When the water temperature is 18-23 ℃, the feeding amount is 5%-7%; when the water temperature is 24-30 ℃, the feeding amount is 7%-10%; when the water temperature exceeds 33 ℃, the feeding amount should be reduced, and stop feeding when the water temperature exceeds 36 ℃. Daily feeding should also be determined to increase or decrease according to the climate, water quality, appetite, floating head and fish disease of the day. Under normal circumstances, Pelteobagrus fulvidraco can be eaten within 1 hour, if it can be eaten within 1 hour, it can be increased the next day, and if it is not finished within 1 hour, it is necessary to analyze the reasons, reduce or even stop feeding according to the situation.

3. Feeding method Young Pelteobagrus fulvidraco likes to feed in the middle of the cage, likes live, fishy and soft feed, and gradually likes low light and bottom feeding as the individual grows. It is usually fed once every morning and once in the afternoon, and it is better to feed in the afternoon in the evening. The amount of feeding should be flexibly controlled according to the water temperature and weather conditions. Throwing and feeding ball-shaped feed by hand, each feeding should be controlled in about 10 minutes, or a small number of times according to the domestication situation. The control of the food intake of Pelteobagrus fulvidraco in the cage is based on whether there is food left on the feed table, and the second is to carefully observe the changes of the "shadow" of the fish in the water. It is usually observed that at the beginning of feeding, the density of the fish is relatively high, and the "shadow" of the population gradually becomes small after eating the best part, so the feeding should be over.