Feedstuff additive for reinforcing immunity of sea water fish

Abstract

The invention discloses feed additive which improves the immunity of seawater fish. The feed additive consists of three or more than three types in clostridium butyricum, mannan oligosaccharide, xylo-oligosaccharide and fructooligosaccharide by proportion. 0.1 percent to 1 percent of seawater fish immunity intensifier of the invention is added into seawater fish feed, which can obviously improve the level of the muramidase in serum and skin mucus, obviously improve the level of IgM in the serum and the skin mucus, improve the fish immunity response capability, thereby improving the disease resistance of the cultivated fish. 1 percent of the immunity intensifier of the invention is added into the seawater fish feed, which can obviously improve the daily weight gain of the fish and reduce the food coefficient. The feed additive which improves the immunity of the seawater cultivating fish of the invention can obviously improve the immunity response level of the seawater cultivating fish, improve the disease resistance, and is safe without public harm and residue; the seawater fish cultivated by the additive meet the green food sanitation requirements.

Description

technical field [0001] The invention relates to a feed additive, in particular to a feed additive for enhancing the immunity of seawater fish. Background technique [0002] my country is a big fishery country. In the past 20 years, the aquaculture industry has developed rapidly, the total amount of aquatic products has increased significantly, and the comprehensive benefits have been significantly enhanced. In 2006, the total annual output of aquatic products in my country reached more than 52 million tons, and the total output value of the fishery economy exceeded 820 billion yuan, of which aquaculture production accounted for 65% of the total output of aquatic products in the country. With the continuous expansion of farming scale, more and more problems are gradually exposed. The most prominent problem is that large-scale and intensive aquaculture lead to eutrophication of aquaculture water and sediment, and nutrient enrichment in water will cause a series of problems: 1...

AI Technical Summary

Problems solved by technology

The most prominent problem is that large-scale and intensive aquaculture lead to eutrophication of aquaculture water and sediment, and nutrient enrichment in water will cause a series of problems: 1. Nitrite, nitrate, ammonium salt and hydrogen sulfide in water, etc. A large amount of chemical pollutants accumulate, and such a stressful environment leads to a decline in the immunity of aquatic animals; 2. Harmful anaerobic microorganisms multiply in large numbers in the water body, resulting in large-scale occurrence of infectious diseases in aquatic animals; 3. Harmful algae multiply, which not only consumes oxygen in the water body , and will produce a large amount of harmful toxins, resulting in a large number of deaths of aquatic animals; 4. Due to the serious nutrient enrichment of water bodies, fishermen put a large amount of antibiotics into the water bodies in order to prevent and control diseases, and even banned fish medicines, resulting in excessive antibiotics and banned drugs in aquatic products , greatly affecting the health of consumers

Although the use of individual probiotics and oligosaccharides can improve the immunity of animals, the effect of using a certain oligosaccharide or probiotics alone on marine fish is not ideal. Therefore, it is necessary to use a variety of oligosaccharides and probiotics. Compatibility to enhance the immunity of sea fish and improve their disease resistance

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