Healthy breeding method of Ietalurus punetaus

Abstract

The invention relates to a healthy breeding method of Ietalurus punetaus. The healthy breeding method comprises the following steps: (1) selection of a culture pond; (2) repairing and maintaining of the culture pond; (3) disinfection and pretreatment of the culture pond; (4) taming of fish fries: selecting juvenile Ietalurus punetaus with healthy body surface, normal food intake and body weight of 120+ / -5 g as the fish fries, placing the juvenile Ietalurus punetaus in a net cage, feeding the juvenile Ietalurus punetaus with an immunological enhancement bait special for Ietalurus punetaus, taming the juvenile Ietalurus punetaus for 30-45 days until the juvenile Ietalurus punetaus adapts to the fed bait; (5) cage-free breeding of the juvenile Ietalurus punetaus: breeding the juvenile Ietalurus punetaus well tamed in the step (4) in a cage-free manner in the culture pond treated in the step (3) with the released density of 22-25 thousand / mu; (6) culture management: with the concentration of dissolved oxygen being 7.5 mg / L or above, carrying out mechanical oxygen enhancement 2-3 times a day, 2-3 hours each time, keeping the pH value at 7.5-8.0, feeding the immunological enhancement bait special for Ietalurus punetaus according to the proportion that the feeding dosage accounts for 5-8% of the weight of the juvenile Ietalurus punetaus bodies, and replacing 1 / 3 of water in the culture pond each month. The healthy breeding method of Ietalurus punetaus has the advantages that the breeding density is high, the growth rate is high, the culture cycle is shortened by 15-20% as compared with that in the prior art, the disease incidence rate is reduced, and the economic benefits are high.

Description

technical field [0001] The invention relates to a healthy breeding method for channel catfish. Background technique [0002] Channel catfish (Ictalurus punctatus), native to the Americas, is also known as channel catfish. It has the characteristics of fast growth, wide temperature range, and strong disease resistance. Channel catfish meat is tender, delicious, rich in protein and unsaturated fatty acids, and is deeply loved by consumers in the United States, the European Union and other countries. However, due to its low local production, most of the demand depends on imports. The outlook is promising. [0003] In the intensive breeding mode of channel catfish, high stocking density is the basis for obtaining high breeding returns. Feeding high-grade feed can promote the growth of channel catfish, shorten the breeding cycle, and achieve early market launch. However, in the process of long-term feeding of high-grade feed to ensure that the channel catfish has a good growth ...

AI Technical Summary

Problems solved by technology

However, in the process of long-term feeding of high-grade feed to ensure that the channel catfish has a good growth advantage, the physical weakening of the channel catfish is also serious. The main symptoms are loss of appetite, dull body color, and white or yellow liver. "Mottled", enlarged gallbladder, pale yellow bile, etc.; when the temperature difference changes or the water quality is unstable, the susceptibility of channel catfish to pathogenic bacteria increases, and sporadic disease often occurs. In severe cases, the number of channel catfish per mu is high. The economic losses caused by

In view of the weakening of channel catfish's physique, the use of antibiotics mixed with feed for oral administration is not only inappropriate, but will further induce problems such as physical decline, drug residue and water pollution of channel catfish; other commercially available health care drugs are often difficult to achieve due to lack of specificity ideal health effects