Enjoy fishing delicacies and use precious fish and sapphire fish
Sapphire fish belong to the order Perciformes. They are abundant in the United States and naturally distributed along the Atlantic coast of the United States. It gets its name because of its gorgeous color, silvery gray back and flashing blue fluorescence. Sapphire fish has delicious meat and tastes better than the famous grouper. It is an important food and fishing fish in the United States, and it is known as the "first fish" in the United States. In 2003, the Marine Branch of China Old Professors Association applied for introduction, and in 2004, fish fry was bred in Laizhou Huachi Fisheries Co., Ltd. after on-site acceptance, 400000 sapphire fry have been successfully bred, including 120000 commercial fry with more than 5 centimeters. Sapphire fish belongs to wide-temperature and wide-salt fish, which has great popularizing value. It can be cultured in seawater and brackish water environment, and is suitable for cage, pond, factory, greenhouse and other ways of culture. Under suitable conditions, it can reach the commodity specification in 5-6 months. At present, it has been put into factory culture in Panjin, Liaoning Province. The successful introduction of the project will help to improve the industrial structure of mariculture in northern China, which will greatly enhance the economic benefits of aquaculture and promote the sustainable development of aquaculture.
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New technology of clearing pond and removing wild land
At present, the commonly used pond cleaning drugs are quicklime, tea meal, bleach, bleach, trichloroisocyanuric acid and so on. 1. Quicklime clear pond quicklime (CaO) produces strongly alkaline calcium hydroxide when exposed to water, which makes the pH (pH) of the pond water rise sharply to 11: 12, so it can kill wild fishes, enemy organisms and various pathogens. two。 Tea meal Qingtang tea meal is a round cake made from the remaining residue of Camellia oleifera seeds after pressing oil. Usage: beat the tea meal into small pieces and use
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Method of "bag disinfection" for spring-released fish species
Fish species "bag disinfection" is a new method of fish species disinfection summarized and used by fish farmers in recent years. Its advantages are simple, less expensive, able to reduce fish diseases and high survival rate. The method is as follows: 1. Operation ① Put the nylon bag containing fish species on the edge of the pond (untie the bag mouth), and the water surface in the bag outside the bag is flat.② Put the liquid medicine into the bag and shake it up, observe the fish species activity, and throw it into the pond after disinfection time. 2. Drug preparation and soaking time ①3%-5% salt solution, soaking fish for 20 minutes, can prevent and treat bacterial diseases
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