In the small-scale reservoir fish farming production, due to technical and management reasons, there is often a phenomenon that the rate of catching fish is low, resulting in a decline in economic efficiency. Therefore, to raise the rate of catching fish in small reservoirs, the following six measures should be taken in production.

First, completely eliminate predators. Before some fisheries stocked fish species, they did not completely eradicate the enemy fish. As they grow older, their ferocious fish flocks and they rush to eat other fish species. Coupled with the natural enemies of snakes, mice and other fish, it will inevitably affect the rate of catch and production of fish in the reservoir. Therefore, before stocking fish stocks, we must use dry section reservoirs and use drugs to kill the entire reservoir.

Second, improve the fish facilities. The imperfect facilities for retaining fish in the reservoir will lead to the escape of a large number of fish species, which will seriously affect the catch rate and yield. Blocking fish nets generally requires a size of 4-5 centimeters and can intercept large-sized fish species with a body length of 16 cm or more.

Third, appropriately reduce the stocking specifications. Some newly-built reservoirs have few predators, and they have complete facilities to stop fish, and they can appropriately reduce the size of stocked fish species, but they must not be smaller than 10 cm. The length of grass carp and herring fish should be more than 16 cm, and that of carp and carp should generally be more than 13 cm.

Fourth, a reasonable mix of stocking species. The lean water reservoirs are mainly squid-feeding, with a small amount of white peony, and the water-fat reservoirs are mainly larvae, with a small amount of grass carp, herring, squid or squid. Reservoirs with large changes in flat type or water level have more aquatic weeds and can increase the stocking ratio of grasses, cockroaches and eels. A reservoir rich in silt and benthic organisms can increase the amount of eel and eel. The general stocking ratio is 50%-60% for carp, 30%-40% for carp, 10%-20% for grass carp, carp, carp, etc.

Fifth, depending on the quality of water fat lean stocking density. Nutritional reservoirs (more than 1 million phytoplankton per liter of water, more than 2,000 zooplanktons), 100 to 300 tails per mu, and general nutrient reservoirs (300,000 phytoplankton per liter of water) Thousands, 1,000 to 2000 zooplankton species, 50 to 100 acres per mu, lean and nutrient reservoirs (less than 300,000 phytoplankton per liter of water, less than 1,000 zooplankton), 30 to 50 acre .

6. Choose the appropriate time and place for restocking. Choose Kuwan, which is rich in bait, to drive away the fierce fish and big fish in the bay, use the interception to block the fish, and then remove the block after the spring, which can effectively increase the survival rate of the species. Raising fingerlings in the autumn harvest season will allow fish species to adapt to the surface water environment in advance. At the same time, the weakening activity of ferocious fish in winter and feeding and feeding will also help improve the survival rate of the species. Locations should be chosen to shelter from the wind in the upper reaches of the city and be distributed at points. Do not put it near dams and drainage gates.

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