9 results about "Silver carp" patented technology

The invention relates to the field of aquatic food traceability, in particular to a system for identifying wild and culture sources of chubs and application of the system. The system comprises: a sample processing module, wherein the sample processing module is at least used for processing a chub sample to obtain original data of a polypeptide as shown in any one of SEQ ID NO.1-4, and obtaining proteome component response of a to-be-detected sample; the data processing module is at least used for importing the proteome component response of the sample to be detected into an OPLS-DA classification discriminant analysis model to obtain a score plot for discriminant analysis of subsequent sample data; and the result output module is at least used for outputting a result. The system can be effectively used for identifying wild and culture sources of silver carps, is high in stability and specificity, does not need to use a large instrument, is low in detection cost, and has a wide application prospect in the aspect of aquatic product traceability.

This invention discloses a method for co-culturing giant freshwater prawns (Macrobrachium rosenbergii) with shrimp, grass, and fish based on probiotic regulation, and its application. This invention constructs a three-dimensional ecological system with shrimp as the main body, grass as the protector, and fish as a supplement. Elodea and water spinach purify the water, silver carp and crucian carp decompose uneaten feed and feces, and a compound microbial preparation of Lactococcus gasseri C6a2 regulates water quality, while a biological bottom conditioner improves the bottom sediment, achieving precise ecological regulation of the aquaculture environment. This invention does not rely on chemical agents, effectively inhibits ammonia nitrogen accumulation, reduces disease incidence, and significantly improves the survival rate and size of giant freshwater prawns, achieving a win-win situation for both ecological and economic benefits.

This invention relates to the field of aquatic compound feed technology, specifically to a special feed for mullet, silver carp, and golden carp cultured in saline-alkali land in Northwest China. The feed is characterized by being composed of the following raw materials by weight percentage: 10%–14% alfalfa meal, 16%–22% soybean meal, 16%–22% corn meal, 5%–7% molasses, 1%–3% yeast powder, 2%–5% lactic acid bacteria preparation, 2%–5% premixed feed for aquatic life in saline-alkali land in Northwest China, 1%–4% fish oil, and 1%–5% vegetable oil. This invention solves the problems of low survival rate, high feed conversion ratio, easy antagonistic inactivation of probiotics, fish oil oxidation, poor water resistance of pellets, and insufficient regional adaptability of traditional feeds. Compared with commercially available ordinary marine fish feeds, the survival rate of juvenile fish is increased by 15% to 30%, the feed conversion ratio is reduced by 10% to 20%, the Vibrio inhibition rate is ≥80%, the power consumption per ton of feed is reduced by 25% to 35%, and the raw material cost is reduced by 30% to 45%. It is suitable for large-scale aquaculture in saline-alkali land in Northwest China and has important value for improving the quality and efficiency of fisheries, ecological restoration, and rural revitalization.

The present application belongs to the technical field of polypeptide processing, and particularly relates to a preparation method of protein peptide capable of improving flavor and function; the method uses silver carp as raw material, uses food-grade protease, and obtains full fish protein peptide through moderate enzymolysis; under mild conditions, nitrogen is used to replace air to perform glycosylation reaction, which can effectively improve the flavor and antioxidant function of the full fish protein peptide; compared with the original full fish protein peptide and the full fish protein glycopeptide prepared by using air for glycosylation reaction, the full fish protein glycopeptide prepared by the method has lighter fishy smell and bitterness, can effectively improve the acceptance of the public, has strong antioxidant function and good storage stability, and can be widely applied in special food and nutritional food.

The invention discloses a symbiotic freshwater shrimp green culture system and method based on localized film laying, and belongs to the technical field of aquaculture, and the technical scheme is as follows: geomembranes are laid on the pond wall and the pond bottom of a pond, the geomembranes are fixed through ground nails and gaskets, joints are bonded through hot melt adhesive, and the geomembranes form a main shrimp channel, a longitudinal auxiliary shrimp channel and a transverse auxiliary shrimp channel; the enclosed exposed pond bottom grids are used for planting aquatic plants; a long PVC drainage pipe with dense small holes is laid at the bottom of the pond, the front end is sealed by a plug, and the tail end is connected with a valve to control drainage; sectional type self-sinking nanometer aeration pipes are laid in the same direction of the drainage pipe, and multi-point sectional type bottom aeration is achieved through connection of a main ventilation pipe and a roots blower; the culture system comprises several nutritional levels of shrimps, aquatic plants, chubs and escargots to form a symbiotic system. The system is mainly used for green ecological breeding of freshwater shrimps, can effectively maintain the water body to be clear and guarantee stable growth of aquatic plants, realizes self-purification of water quality through multi-nutrition-level symbiosis, and improves the stability of the breeding system and the breeding capacity of a unit area.

The invention belongs to the technical field of polysaccharide preparation, and particularly relates to chub fishbone polysaccharide as well as a preparation method and application thereof. The method comprises the following steps: drying and crushing pretreated silver carp processing byproducts to obtain fish bone meal; then mixing and stirring with petroleum ether, degreasing and drying to obtain degreased silver carp bone meal; the preparation method comprises the following steps: dissolving degreased silver carp bone meal in water, adjusting the pH value to 4-10, adding papain, carrying out water bath heating extraction, centrifugation and rotary evaporation concentration, adding absolute ethyl alcohol, standing, centrifuging, redissolving, dialyzing and freeze-drying to obtain the silver carp bone polysaccharide. The preparation process is simple, the silver carp fishbone polysaccharide is high in purity and extraction rate, and the prepared silver carp fishbone polysaccharide has good free radical scavenging capacity and can be suitable for extraction of fishbone polysaccharide in processing by-products of grass carp and other freshwater fishes, and the utilization rate of the processing by-products of freshwater fish products is increased.

The invention discloses photodynamic antibacterial liquid for fresh keeping of silver carp balls as well as a preparation method and application of the photodynamic antibacterial liquid, and belongs to the technical field of food fresh keeping. According to the invention, two coating solutions are prepared to research the influence of the coating solutions on the quality change of the fish balls in the storage period: one is a chitosan coating solution loaded with cinnamyl aldehyde-tannic acid nano-emulsion, cinnamyl aldehyde and tannic acid are natural compounds and are proved to have strong oxidation resistance, chitosan has broad-spectrum antibacterial property, and the coating solution is a chitosan coating solution loaded with cinnamyl aldehyde-tannic acid nano-emulsion; the shelf life of the food can be obviously prolonged; according to the photodynamic mediated gallic acid antibacterial liquid, research shows that a polyphenol aqueous solution can be subjected to photooxidation after being subjected to light irradiation treatment, active oxygen is generated, and the antibacterial liquid has high antibacterial activity. The silver carp balls which are more easily deteriorated are researched and selected, and the fish balls are treated by adding a coating preservation technology, so that the influence of different coating solutions on the quality of the fish balls in the storage period and an antibacterial mechanism are researched, and an instructive effect is provided for later application of the coating technology and preservation of the fish balls.

The application provides a high-gel-quality surimi gel and a preparation method thereof. After frozen white silver carp surimi is thawed, ice temperature vacuum dehydration and ultrahigh pressure homogenization treatment are carried out, the myofibrillar protein molecular chain is stretched by mild shearing force, and the TG enzyme action site is fully exposed; then, the surimi is chopped and mixed with salt, starch, TG enzyme porous starch-pectin oligosaccharide nanosphere dispersion and ice water at low temperature, wherein the nanosphere shields the TG enzyme at low temperature to avoid early activation, and is accurately released to catalyze cross-linking when heated; finally, the surimi is gelled by step heating, the strength and uniformity of the surimi gel are significantly improved, the flavor is improved, and the surimi gel is suitable for industrial production.

The invention discloses a free amino acid multi-index combination for identifying wild silver carps, a distinguishing method and application. The free amino acid multi-index combination comprises at least four of phosphoserine, taurine, threonine, sarcosine, beta-aminoisobutyric acid and hydroxyproline. The distinguishing method comprises the following steps: measuring the content of amino acids in a specific combination in a to-be-detected sample, inputting the content into a preset logistic regression model to calculate a wild probability value, and comparing the wild probability value with a distinguishing threshold value optimized and determined through an ROC curve so as to judge a source. According to the technical scheme, the specific biomarker for discriminating the source of the silver carp is defined for the first time, and the problem that a traditional experience discriminating method is high in subjectivity is solved. Through construction of the quantitative model, rapid, objective and high-precision discrimination is realized, and the discrimination accuracy of the optimal combination model can reach 97.8%. The method provides reliable technical support for identifying illegal fished catches in fishery administration law enforcement in the Yangtze River basin, and has important significance for protecting wild silver carp resources.