How to manage fishing affairs in June? Key points that aquaculture farmers must read

June is the best period for aquaculture animals to feed heavily and grow rapidly, and it is also a stage when epidemics among aquaculture animals are prone to break out. Therefore, fishing affairs in June should be carried out around feeding and disease prevention.

Feeding

(1) Master the feeding amount. The daily feeding amount of different feeds as a proportion of the body weight of aquaculture animals in the pond is as follows: ordinary feed such as rapeseed cake and soybean meal, 6%-8%; pelleted compound feed, 2%-4%; for carnivorous fish such as mandarin fish and bass that are directly fed small fish and shrimp, 1%-2%; green feed, 8%-10%. (2) Ensure feed quality. Animal feed should be fresh and palatable, and basically free of pathogenic bacteria. Compound feed should have a reasonable formula and comprehensive nutrition. Green feed should be tender and refreshing. (3) Feed scientifically. Adhere to the four-fixed principle, and flexibly control the feeding amount according to weather, water quality, and the activity and feeding conditions of aquaculture animals.

Water regulation

(1) Regularly use quicklime or other water body cleaners to clean the aquaculture water body, kill harmful bacteria, and keep the transparency, dissolved oxygen, pH value, etc. of the water body in a suitable state. (2) Regularly use microecological preparations to regulate water quality. Commonly used microecological preparations include photosynthetic bacteria, Bacillus subtilis, Bacillus, Lactobacillus, and EM, etc. (3) Regularly flush and change water so that the aquaculture water body always remains in a fertile, lively, tender, and refreshing state. (4) Use aerators to keep dissolved oxygen in the water body always above 5 mg/l.

Disease prevention

(1) Implement the policy of giving priority to prevention and combining prevention with treatment, and comprehensively do a good job in fish disease prevention, including selecting and releasing high-quality fry, and thoroughly disinfecting water bodies, feed, feeding grounds, and tools. (2) Prescribe the right medicine and use medicine safely. Diagnose fish diseases promptly when they occur, determine the cause, and choose high-efficiency and low-toxicity drugs for treatment.

Polyculture

Make full use of the three-dimensional space of aquaculture waters and the principle of symbiotic mutual benefit among aquaculture animals, and implement multi-variety and multi-size three-dimensional mixed culture and polyculture. (1) Crab-shrimp polyculture. In mid-to-late June, release 20,000-30,000 shrimp fry cultivated in the current year in each mu of crab pond. (2) Fish-turtle polyculture. In conventional fish culture ponds, move juvenile turtles cultivated in greenhouses out in early June and put them into @#@233@#@ ponds, releasing 30-50 per mu. (3) Crab-fish polyculture. In @#@235@#@ ponds, release some mandarin fish fingerlings bred in the current year in early June, or release other carnivorous fish fingerlings, about 50 per mu. (4) Shrimp-shellfish polyculture. In shrimp culture ponds, release hard clams or razor clams, cyclina sinensis, mud snails, etc. The release amount depends on the level of feeding management and the conditions of the shrimp pond. (5) Polyculture of fingerlings in conventional fishing ponds. In adult fish ponds for black carp, grass carp, silver carp, bighead carp, crucian carp, and bream, etc., some summer fingerlings or one-year-old fingerlings can be polycultured in June. Where conditions permit, rotational harvesting and stocking can be implemented.

Breeding

The main work is to do a good job in the breeding of mandarin fish, @#@243@#@ fish, freshwater pomfret, Clarias leather, channel catfish, pufferfish, long-snouted catfish, and traditional aquaculture aquatic product fingerlings, and to do a good job in the breeding of crab species.