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414 results about "Crucian carp" patented technology

The crucian carp (Carassius carassius) is a medium-sized member of the common carp family Cyprinidae. It occurs widely in northern European regions.

Method for breeding allogynogenetic crucian carp fry at low temperature

The invention discloses a method for breeding allogynogenetic crucian carp fry at a low temperature. The method comprises the following steps of preparing a male and female parent fish dedicated culture pond, selecting and breeding male and female parent fishes, carrying out hasten parturition on the male and female parent fishes, enabling the male and female parent fishes to lay eggs and be fertilized, enabling fertilized eggs to unstick, hatching the fertilized eggs, demolding and breeding the fertilized eggs into small fry, and breeding the small fry into large-size allogynogenetic crucian carp summer flower fry by sending the small fry into the culture pond. According to the method disclosed by the invention, high-quality allogynogenetic crucian carp fry can be bred when the temperature is low in Spring, and the emergence rate and the survival rate of the allogynogenetic crucian carp fry are very high; the production demands of the allogynogenetic crucian carp fry can be ensured, and the economic benefit of an allogynogenetic crucian carp breeding user can be greatly increased; the sustainable development of an allogynogenetic crucian carp breeding industry and the whole ecological benefit, the economic benefit and the social benefit of a fish farming industry can be greatly increased.
Owner:潘洪强 +1

Mullet and crucian carp mixed culture puffed feed and preparation method thereof

The invention relates to a mullet and crucian carp mixed culture puffed feed and a preparation method thereof, and belongs to the technical field of aquatic feeds. The mullet and crucian carp mixed culture puffed feed is prepared by the steps of crushing fish meal, soya bean meal, rapeseed meal, peanut meal, DDGS (Distillers Dried Grains with Soluble), peas, bean curd residues, cottonseed meal, wheat, cassava, corns and rice bran, and then agitating and uniformly mixing with soya-bean oil, monocalcium phosphate, an anthraquinone extract, glycine betaine, allicin, table salt and a fish premix to obtain a mixture; agitating, uniformly mixing and crushing the mixture by an ultrafine grinder to obtain a mixed material; transferring the mixed material into a regulating device and introducing vapor for regulating; after the regulation, conveying the mixed material into an extruding and puffing granulation machine to prepare pellet feeds; drying the puffed pellet feeds, cooling and packaging. The puffed feed has balanced and abundant nutrition and the nutritional requirements of mullets and crucian carps can be met at the same time; the puffed feed is used for the mixed culture of the mullets and the crucian carps and has the good stability in water; the puffed feed floats on the water surface and the ingestion efficiency is improved; the food coefficient is reduced and the cultivation cost is reduced; the pollution to a water environment is reduced.
Owner:YANCHENG INST OF TECH

Method for optimal seedling selection and breeding of novel carassius auratus gibelio series

The invention relates to a method for optimal seedling selection and breeding of novel carassius auratus gibelio series, which comprises the following steps: (1) extracting an egg of a Fangzheng crucian carp; (2) extracting a sperm of a Xingguo red carp; (3) stimulating the female nucleus of the egg of the crucian carps for development to generate an offspring through the sperm of the Xingguo red carp; (3) extracting a sperm of a grass carp and a sperm of a megalobrama amblycephala, and extracting an egg of the offspring generated in the previous step; (5) stimulating the female nucleus of the egg of the offspring generated Step (3) for development with the sperm of the grass carp and the sperm of the megalobrama amblycephala; and (6) breeding the improved seedling. The invention has the following technical effects that: 1) the novel carassius auratus gibelio series with genetic stability can be obtained; 2) the sporozoon resistance of the bred novel carassius auratus gibelio series can be significantly improved; 3) the growth speed of the bred novel carassius auratus gibelio series is high, and the intestinal length/full length is increased, thereby facilitating the improvement of the digestibility; and 4) the thickness of the dorsal muscles and the tightness of the scales of the bred novel carassius auratus gibelio series are improved, the survival rate in the long-distance transport is more than 95 percent, the visceral mass is reduced, the body length is increased, and the intramuscular bones are decreased.
Owner:江苏海辰科技集团有限公司

Pond efficient ecological polyculture method suitable for grass carps, chubs, bighead carps, paddlefish and crucian carps

The invention belongs to the field of pond culture, and relates to a pond efficient ecological polyculture method suitable for grass carps, chubs, bighead carps, paddlefish and crucian carps. The method comprises the steps of: 1) filling fresh water after 1 week after preparation and disinfection of a pond and carrying out probationary culture of chub till the chub survives; 2) stocking 150g of grass carp, 100g of chub, 100g of bighead carp, 150g of paddlefish and 60g of crucian carp at one time, wherein the polyculture proportion is that grass carps account for 75%, chubs account for 8%, bighead carps account for 6%, paddlefish account for 6% and crucian carps account for 5%, and the average culture density is 3/sq.cm; 3) feeding twice a day, wherein the total feeding weight per day accounts for 5% of total weight of grass carps in the pond, the feed is polyculture fish seed particle matched feed, and the time of manual feeding begins from the time when the fish seeds are cast to 210 days; 4) adding 20cm of fresh water into the pond every week; maintaining the water quality at pH 7.5-8.5, temperature at 20.0-31.0 DEG C, nonionic ammonia smaller than or equal to 0.02mg/L, total alkalinity 1.00-2.00mmol/L, dissolved oxygen greater than or equal to 5.0mg/L, transparency 28-32cm, chemical oxygen consumption smaller than or equal to 15mg/L, biochemical oxygen demand smaller than or equal to 5mg/L and total escherichia coli smaller than 5000/L for 210 days. The average fish yield in the middle and lower reaches of the Yangtze River can reach 1000kg/667 sq.cm.
Owner:HUAZHONG AGRI UNIV

Method for preparing acetylcholinesterase fluorescence biosensor

The invention relates to a method for preparing an acetylcholinesterase fluorescence biosensor. The invention solves the following problems: the existing enzyme biosensor is prone to being affected by environmental influence so that the enzyme losses activity thus resulting false- positive; the existing biosensor is not allowed for repeated use due to irreversible reactions, in which enzymes are expensive, so that the cost of the equipment is excessively high; the selectivity is low, etc. The method comprises the following steps: firstly, carrying out the extraction separation and purification on acetylcholinesterase in crucian carp brain; then, carrying out the immobilization on the acetylcholinesterase in the crucian carp brain by chitosan; preparing immobilized acetylcholinesterase membranes, namely, obtaining the acetylcholinesterase fluorescence biosensor. The acetylcholinesterase fluorescence biosensor prepared by the invention dispenses with neither external power connection nor reference electrodes, and has the advantages of small size, light weight, high response speed, electromagnetic interference resistance, corrosion resistance, high sensitivity, wide measurement bandwidth, convenient operation, low cost and the like, therefore, the invention is applicable to the rapid detection of organophosphorus pesticide in food.
Owner:王振宇
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