High-yield sweetfish cultivation method

Abstract

The present invention discloses a high-yield culture method of sweet fish comprising the control of breeding time of fry in a culture pond, water temperature for culture and culture density, feed throwing and feeding and prevention of disease; the breeding time is from the end of December to the end of March next year; the water temperature for culture is 13 to 28 Celsius degrees and the culture density is that 360 to 380 fries per cubic meter in 20 days, 200 to 240 fries per cubic meter in a period of 20 to 40 days, 150 to 180 fries per cubic meter in a period of 40 to 60 days and 80 to 120 fries per cubic meter 60 days later; the feed amount thrown every day is 2 to 5 percent of the gross weight of sweet fish and the feed is thrown and fed by 2 to 5 times; the feed is added with grain feed of 10 days after breeding and only grain feed is used 20 to 50 days later; 5 kg garlic or 3kg good liver and gall is added in the feed per ton for a continuous three days every month and povidone iodine or calcium oxide is used for sterilization for a continuous three days every month. The present invention is characterized by long culture time, high survival rate and high per mu yield.

Description

technical field [0001] The invention relates to fish breeding technology, in particular to a high-yield breeding method for sweetfish. Background technique [0002] Sweetfish (Pleccoglossus altivelis Temminck et Sohlegel) is a small, famous and valuable economic fish, which is named after bursts of fragrance. Ayu has been regarded as a rare edible fish since the Ming Dynasty and has been regarded as a rare fish because of its tender meat, fragrance and no fishy smell, and it is golden yellow after being dried with fire. It has good color, aroma and taste, and has its unique flavor. Tribute to the court. In Japan, sweetfish is known as the "king of freshwater fish". The wholesale price of sweetfish in the Japanese market is 1500-2000 yen / kg. Yuan / kg, dried sweetfish is as high as about 600 yuan / kg, and it is about 400 Taiwan dollars / kg in Taiwan. At present, the method of artificial breeding of sweetfish is to put the fry of sweetfish into the breeding pond from March, fee...

AI Technical Summary

Problems solved by technology

However, sweetfish breeding is very difficult, and the technical problems that plague sweetfish farming mainly include: first, the control of the water temperature for breeding. The suitable water temperature for the growth of sweetfish before the weight of 10g is 18-20°C, and the suitable water temperature for the growth of sweetfish after the weight of 10g is 22-20°C. 24°C, and it is difficult to control the temperature of the breeding water under natural conditions; the second is the domestication of the feed and the feed that is fed. The natural bait of sweetfish mainly includes rotifers and copepods. The natural bait is limited by natural collection and the price is high. The feed used is the block feed used with the eel to scrape the sweetfish, but it will lead to problems such as difficulty in scraping and susceptibility to enteritis; problems such as the regulation of breeding density, the prevention and control of germs, and the control of sexual maturity

The above-mentioned factors have caused the survival rate of aquacultured sweetfish to be low at present, only 50%-70%. The abdomen is iron-induced, the scales on the body surface are rough, the abdomen of the female fish is swollen, and the abdomen appears light yellow. The breeding and sales time is relatively short. Generally, it will be on the market in May, and there will be no sales of fresh sweetfish after October. The yield per mu is low and can only reach 1.7-2.5 tons / mu