Detailed Explanation of Key Techniques for Enclosure Fishing in Large Water Bodies

Large-water-body enclosure @#@233@#@, due to the large area and difficulty of catching fish, most farmers currently still drain the water to catch fish during New Year's Day and the Spring Festival each year, which not only wastes water but also affects profits because fresh fish flood the market at the same time. To resolve this contradiction, technicians at the aquaculture farm of Jiangsu State Farms Linhai Farm, through years of practice, have developed a new technique for fishing in large-water-body enclosure aquaculture.

This technique takes advantage of fish's habit of swimming against the current: at the water exchange inlet of the fish pond, a fishing pool 3 m wide, 5 m long and 2.5 m deep is built, with a 1 m wide outlet on the side facing the fish pond. The outlet and the water exchange inlet must be in a straight line. The outlet is fitted with a groove, into which a small gate made of fishing net is inserted. When fish need to be caught, simply inject new water, and the fish will swim against the current into the fishing pool. One pool can catch 2500-5000 kg of fish at a time, and it is also possible to catch the large ones and leave the small ones.

With this technique, no matter how large the water surface is, rotational harvesting can be carried out in all four seasons and the fish can be marketed in a balanced way, which not only speeds up the stocking cycle but also improves the utilization rate of the fish pond. Last year, the farm applied this technique, and the 250,000 kg of commercial fish harvested rotationally and marketed sold for more than 1.5 million yuan extra.