105 results about "Aquaculture of tilapia" patented technology

The invention relates to a feed additive specially used for tilapia. The feed additive is prepared by grinding and mixing the following raw materials in parts by weight: 5-8 parts of rhizoma anemarrhenae, 5-8 parts of catalpa leaves, 5-8 parts of the fruit of Chinese wolfberry, 4-7 parts of rheum officinale, 3-7 parts of cortex magnoliae officinalis, 3-6 parts of agastache rugosus, 3-5 parts of the root of red-rooted salvia, 2-4 parts of radix astragali, 1-2 parts of platycladi seeds, 1-2 parts of acalypha australis, 1-2 parts of bighead atractylodes rhizome and 10-25 parts of a carrier. The feed additive specially used for the tilapia obviously improves the economic benefit of tilapia aquaculture, remarkably improves the anti-stress capability of the tilapia, improves the immunocompetence of the tilapia and reduces the occurrence of nutritional fatty liver disease and streptococcicosis in an aquaculture process, so that the survival rate of the tilapia is increased by 15-22%; and furthermore, the feed additive can promote the growth of the tilapia, and improves the quality of the tilapia meat.

The invention provides an indoor circulating water prawn high density breeding process. A breeding pool, a self-rotating type micro-filter, an air sifter type egg white separator, a forward and backward biological processor, a bag type collector, an ash setting pond, a bait fishpond or a tilapia breeding pond, a setting pond and an ecological water return pond are included. The self-rotating type micro-filter is connected with the breeding pond through a water lifting pump. The bag type collector is used for collecting solid waste of the self-rotating type micro-filter. Clean water obtained through processing of the self-rotating type micro-filter flows to the air sifter type egg white separator and then flows to the forward and backward biological processor. The forward and backward biological processor is connected with the setting pond. The self-rotating type micro-filter is connected with the setting pond. The setting pond is connected with the ecological water return pond. Both the bag type collector and the ash setting pond are connected with the bait fishpond or the tilapia breeding pond. According to the indoor circulating water prawn high density breeding process, no water source waste or residue waste exists so that maximum utilization can be achieved, environment pollution is reduced, and the energy consumption is lowered.

The invention discloses a culture method of Tilapia. The culture method comprises the following steps of: selecting a pond which is 2 meters deep, and disinfecting the pond with unslaked lime after emptying the pond in late October every year; before late November, putting grass carp fries which are all heavier than 250g and feeding with a floating grass carp granulated feed when the water temperature is higher than 15 DEG C; in the next year, putting overwintering Tilapia fries which are all heavier than 200g when the water temperature of the pond is higher than 18 DEG C steadily, and feeding the Tilapia fries twice every day; in late July, fishing 90% of Tilapias for sale, then putting current Tilapia fries which are all heavier than 200g, feeding with a Tilapia floating feed containing 28% of protein in a feed ratio of 1-3%; and fishing all the fishes for sale in late October. By utilizing the culture method, the survival rates of Tilapia and grass carp are higher than 99% and 98% respectively, the yearly output of the pond is improved by 15%, and the commercial fishes are large and uniform in specification and are good in quality. The culture method is a healthy ecological culture mode mainly for culturing Tilapia.

The invention relates to special compound feed for tilapia, which is prepared by the following raw materials in parts by weight: 3-8 parts of fish meal, 15-30 parts of soybean meal, 15-30 parts of rapeseed meal, 10-15 parts of cottonseed meal, 10-15 parts of DDSG (Distillers Dried Grains with Solubles), 10-20 parts of flour, 10-12 parts of corn, 4-8 parts of zeolite powder, 1-3 parts of soybean oil, 1-2 parts of fish oil, and 0.6-1.2 parts of special feed additive for the tilapia, and the sum of the parts by weight of the raw materials is 100 parts. The special compound feed for the tilapia can improve the economic benefit of tilapia culture distinctly, enhance the anti-stress capacity of the tilapia significantly, improve the immunity of the tilapia, and reduce the incidences of nutritive fatty liver diseases and streptococcicosis during the culture; a survival rate of the tilapia is increased by 16-20%; the growth of the tilapia is promoted; and the quality of fish is improved.

The invention relates to a method for breeding tilapia mossambica with yield twice a year, comprising the following steps: firstly stocking terch 80-100 fishes/acre and chub 30-50 fishes/acre at January in each year; when water temperature is stably at more than 20 DEG C at the middle of March, stocking wintering tilapia mossambica 1000-1500 fishes/acre, thereby the tilapia mossambica can be can be sold in batches from June to July, wherein size can be 600-700gram/fish; and secondly stocking the tilapia mossambica 500-1000 fishes/acre, the terch 50-80 fishes/acre and the chub 20-30 fishes/acre, thereby the tilapia mossambica can be sold in batches from November to December, wherein the size can be 400-500gram/fish. Feeding grain compound feed (the content of protein is about 30%) in very morning and afternoon, wherein feeding quantity is 3-5% of the weight of the fishes. A pond is sterilized by calcium oxide with quantity being 15 kilograms for each acre and each meter every 15 days, and the pH value of the pond is adjusted to be 7.7-8.0. Aerator is started up for 1-2 hours from 2 clocks to 4 clocks in very afternoon. The method shortens a breeding period of the tilapia mossambica, achieves even sale, and avoids sale in huddles at the end of every year, and can effectively improve pond yield and economic benefit.

The invention discloses a bacillus coagulans strain capable of resisting streptococcus and applications of the bacillus coagulans strain. The strain is preserved in the China General Microbiological Culture Collection Center (CGMCC), and is assigned with the accession number of CGMCC No.12196. The strain is prepared into fungus powder which is added to an animal feed, the fungus powder also can beapplied as a microbial preparation for resisting streptococcus, and after the feed containing the strain is used for feeding tilapia mossambica, streptococcicosis can be effectively prevented and treated. The strain is mixed with bacillus subtilis and lactobacillus johnsonii, then a compound microbial preparation is prepared, and the compound microbial preparation can improve the growth performance of tilapia mossambica, and improve the activity of superoxide dismutase and catalase of the liver and lysozyme in serum. In addition, the fermentation broth of the strain can be adopted as a breeding environment modifier, after the fermentation liquor of the strain is sprayed to an aquaculture pond of tilapia mossambica, the quantity of streptococcus in the aquaculture water can be reduced, andnitrite in the water can be eliminated under the low oxygen condition.

The invention discloses a method for producing seeds of new Nero-Aurea tilapia. The method comprises the following steps: (a) carrying out intraspecific hybridization by taking a female of an Egypt strain in Nile tilapia as a female parent and a male of a Gift strain in the Nile tilapia as a male parent to obtain first filial generation F1 of Nile tilapia; and (b) carrying out interspecific hybridization propagation by taking the female in first filial generation F1 of the Nile tilapia as the female parent and the male of American strain of oreochromis aurea as the male parent to obtain hybrid generation, namely the new Nero-Aurea tilapia. With the adoption of the method provided by the invention, a seed producing technique combining intraspecific hybridization with interspecific hybridization is utilized, excellent characters are combined, and the growth speed and the male rate of the tilapia are improved, thereby the cultural output and benefits of the tilapia are improved.

The invention discloses an amino acid pattern balanced type tilapia mossambica fodder. The fodder comprises the following raw materials by weight percent: 28-40% of a protein source raw material, 2-9% of a fat source raw material, 35-55% of a carbohydrate source raw material, 0-3.0% of compound vitamin, 0-3.0% of compound mineral salt, 0-0.3% of an antioxidant, 0-4% of an adhesive, and 0-13% of cellulose. The tilapia mossambica fodder can meet the requirement of tilapia mossambica on nutrition for optimal growing, effectively solves the problems of poor feed conversion rate and poor protein efficiency caused by unbalanced amino acid of a mixed feed in an existing tilapia mossambica breeding process, not only improves industrial profits, but also lowers the pollution and the damage to an aquatic water environment in the breeding process, and realizes the sustainable development of the tilapia mossambica breeding industry.

The invention relates to a feminization method for ZZ zygocyte of Oria tilapia of which the male parent is ZZ and the female parent is WZ, belonging to the field of tilapia cultivation. The technical proposal is as follows: before the gonad of the Oria tilapia starts differentiation, feeding the Oria tilapia with tonic that contains estrogen hormone for more than 15 days, and then using the ordinary way of feeding and management to get ZZ type physiologically female fish, wherein every gramme of tonic contains 100 to 200 microgrammes of estrogen hormone, and the temperature for feeding with the tonic is 25 to 30 DEG C. The invention can change the hereditarily male fish into physiologically female fish, such that it sets up a novel breeding system of ZZ type all male Oria tilapia having significant meaning in the expanding and breeding of all male Oria tilapia.

The invention discloses an all-year-round artificial propagation method of Tilapia aurea. The method can improve spawning rate, fertilizing rate and hatching rate of parent fishes, and produce high-quality fries with full length of 2 cm satisfying sale specification after culture for 18-20 days. The method provided by the invention can solve the long-term shortage problem of spring early fries in culture of Tilapia aurea, and ensure all-year-round supply of fries to realize balanced production.

The invention relates to an artificial tilapia mossambica breeding technology which comprises the following steps: clearing and disinfecting a fishpond; cultivating the water quality by using organic fertilizers; putting high-quality parent fish in a certain male-female proportion; controlling the water temperature in the breeding pond and promoting the female fish to lay eggs; adjusting the water temperature to promote the natural incubation and produce fry; taking out the fry and putting in a pond with better water quality for breeding; and putting plant and animal baits through a mixed breeding manner to promote the growth. According to the artificial tilapia mossambica breeding technology, the output and the benefit of the tilapia mossambica can be effectively improved and the development of the tilapia mossambica breeding industry can be pushed.

The invention discloses a layered fish and shrimp circulating water polyculture system. The system is composed of a culture pond I (1), a culture pond II (3), a culture pond III (5), a culture pond IV (6), a settling pond I (8), a purifying pond I (10), a clear water pond I (11), a settling pond II (17), a purifying pond II (26) and a clear water pond II (23), wherein the culture pond I (1), the culture pond II (3), the culture pond III (5), the settling pond II (17), the purifying pond II (26) and the clear water pond II (23) are connected in series to form a penaeus monodon culture system, and the culture pond IV (6), the settling pond I (8), the purifying pond I (10) and the clear water pond I (11) are connected in series to form a tilapia mossambica culture system. The system mainly has the advantages that high-density culture of penaeus monodon is achieved; water purifying capacity is high, and drainage rate is low; synchronous culture of penaeus monodon and carnivorous fishes is achieved; separate control of fish and shrimp circulating water can be conducted easily.

The invention discloses a method for producing seeds of supermale Nero-Aurea tilapia, which belongs to the technical field of breeding tilapia. A technical proposal of the method has technical key point of mating WZ female-ZZ male type physiological female oreochromis aurea (ZZ delta female) with XX female-XY male type Nero supermale tilapia (YY male) so as to produce Nero-Austrian genetic supermale tilapia (YZ male). The super tilapia bred by the method has great significance for healthily breeding, improving male rate (100 percent) and promoting tilapia culture technology.

The invention discloses a feed applicable to industrial aquaculture of tilapia, and a preparation method and a feeding method of the feed. The feed is prepared from corn protein powder, chicken powder, bean pulp, fermented rapeseed meal, fermented cottonseed meal, flour, soybean oil, fish oil, rice bran, mineral substances, vitamins and the like according to certain weight percent. The materials are prepared into granules by the steps of mixing, crushing, pelletizing, drying, screening and the like, and the granules are fed to the industrially cultivated tilapia according to the corresponding feeding method. The feed disclosed by the invention is made from the common materials, is low in cost, and is made by the simple and reliable preparation method; the raw materials are reasonable in proportion, and thus the feed can better meet the physiological needs of the industrially cultivated tilapia; the excrement of the tilapia is good in molding and unlikely to scatter, thus being discharged out of a culture system more easily. By virtue of the feeding method disclosed by the invention, ammonia and nitrogen emission can be reduced, the content of ammonia nitrogen and nitrite in a water body can be effectively reduced, and the resistance of the tilapia to streptococcus is enhanced.

The invention relates to the technical field of aquaculture, and concretely relates to an intercultivation method for oreochromis mossambicus and white prawns. The method comprises the following steps: (1) pond treatment; (2) fry throwing and culturing; (3) cultivation management; and (4) water quality management. The invention aims to provide the intercultivation method for the oreochromis mossambicus and the white prawns, white prawn intercultivation in an oreochromis mossambicus pond can fully utilize cultivation water space, reduce prawn cultivation costs, effectively control prawn diseases and infection, and improve cultivation economic benefits.

The invention relates to a tilapia mossambica formula feed with rubber seedcakes and soya bean meal serving as main protein raw materials, and belongs to the technical field of aquaculture. The tilapia mossambica formula feed comprises the following raw materials in percentage by weight: 4 to 8% of fish meal, 10 to 40% of rubber seedcakes, 34 to 40% of soya bean meal, 8 to 12% of wheat middling, 10 to 14% of rice husk,1 to 2% of soybean oil, 0.5 to 1.0% of soya bean lecithin, 0.7 to 1.0% of monocalcium phosphate, 0.03 to 0.05% of vitamin C phosphate ester, 0.1 to 0.2% of choline chloride, 0.1 to 0.3% of methionine, 0.1 to 0.2% of lysine, 0.01 to 0.03% of ethoxyquin, 0.5 to 0.8% of mineral substance premix, and 0.5 to 0.8% of vitamin premix; and the sum of all raw materials in percentage by weight is 100%. According to the tilapia mossambica formula feed, the rubber seedcakes are fully used as the protein raw material of the tilapia mossambica formula feed, so that the soya bean meal and other scarce protein sources can be saved; and the feed has no obvious harmful effect on tilapia mossambica; and meanwhile, the formula cost and feed coefficient are reduced and the culture benefits of the tilapia mossambica are increased.

The invention provides a method for cultivating disease-resistant tilapia improved varieties based on a genome selection technology. The method comprises the following steps: selecting an optimal SNPmarker density by comparing the prediction accuracy of GBLUP and Bayes Cpi under different marker densities; evaluating the prediction accuracy of other genome selection methods under the selected marker density; and comprehensively considering calculation time and prediction accuracy, and selecting a genome estimation breeding value method suitable for disease-resistant breeding of tilapia. The invention provides the method for rapidly and accurately estimating the tilapia disease-resistant trait genome estimation breeding value, wherein the filial generation disease resistance obtained by using the method is higher than the filial generation disease resistance of a control group. By using the method, breeding of disease-resistant tilapia varieties can be accelerated, the tilapia breedingyield is increased, and healthy development of the tilapia breeding industry is promoted.

The invention discloses a composite feed capable for improving the intestinal health of tilapia. The composite feed is obtained by mixing Chinese herbal medicine extracts and basic ingredients, and drying the mixture, wherein the weight ratio of the basic ingredients to the Chinese herbal medicine extracts is (995 to 999): (1-5); each 1 to 5 L of the Chinese herbal medicine extracts is obtained by conducting water extraction on the following Chinese herbal medicine: 2 to 10 g of panax notoginseng, 3 to 15 g of shizandra berry, 5 to 20 g of astragalus membranaceus,5 to 15 g of liquorice, 2 to 10 g of radix notoginseng, 6 to 18 g of lithospermum, 5 to 15 g of silybum marianum, and 2 to 10 g of fructus psoraleae. The composite feed is used for tilapia culture, and can be used for improving the intestinal health of tilapia, and the non-specific immunity of the organism of tilapia. The invention further provides a preparation method of the composite feed.

The invention belongs to the technical field of fish breeding and particularly relates to a tilapia breeding method. The method includes the following steps that firstly, a pond is prepared; secondly, fingerling is put in the pond to be bred; thirdly, the fingerling is processed before being put in the pond to be bred; fourthly, early-stage feeding is conducted; fifthly, middle and later period feeding is conducted; sixthly, water quality is regulated and controlled; seventhly, fish diseases are prevented and treated; eighthly, adult fish is harvested. The tilapia breeding method has the advantages that the tilapia breeding method is easy to implement, the tilapia survival rate is high, growth is fast, each piece of tilapia can be bred to be 1kg or above in about 4-5 months, the number of diseases is small, the bred tilapia is free of mud smell, good in taste and small in content of fat, and the advantages that output is fast, the yield is high and the quality is good are achieved. The breeding method is simple in process and easy to master, apply and popularize, and large-scale breeding can be performed.

The invention relates to the technical field of breeding feed, in particular to tilapia breeding formula feed. The tilapia breeding formula feed mainly comprises, by weight, 30 to 40 parts of bean cakes, 20 to 40 parts of bran, 10 to 20 parts of fish meal, 5 to 10 parts of barley flour, 3 to 8 parts of maize meal, 3 to 8 parts of pagoda tree leaf meal, 0.5 to 2 parts of bone meal and 0.1 to 1 part of salt. Mineral substances or microelement premix which accounts for 0.05% to 0.2% of the mass of the feed and vitamin mixture premix which accounts for 0.3% to 1% of the mass of the feed are added to the feed. According to the tilapia breeding formula feed, nutrition is comprehensive and palatable, the efficiency of the feed is improved, the quality of a breeding water body is improved, growth of pathogenic bacteria in water is restrained, the anti-stress capacity and the immunity are improved, tilapia is effectively prevented from being infected with streptococcus, and the tilapia can reach the level that the tilapia is free of toxic and side effects on the human body.

The invention provides a compound feed used for tilapia mossambica breeding. Per 992-999 parts by weight of the compound feed used for the tilapia mossambica breeding comprises the Chinese herbal medicine extracts prepared from the following Chinese herbal medicines in parts by weight: 0.005-0.025 part of radix astragali, 0.005-0.020 part of dried orange peel, 0.005-0.015 part of Chinese angelica roots, 0.005-0.025 part of radix sophorae flavescentis, 0.003-0.015 part of poria cocos, 0.005-0.030 part of honeysuckle flowers, 0.005-0.020 part of skullcaps, 0.005-0.025 part of mugwort leaves, and 0.005-0.015 part of fennels. The Chinese herbal medicine compound used in the compound feed disclosed by the invention also has the functions of attracting, promoting growth and enhancing non-specific immunity of the body, and is capable of promoting growth performances of the tilapia mossambica in difference stages, improving feed utilization rate, and enhancing non-specific immunity and disease resistance of the tilapia mossambica. Moreover, the invention further provides a compound feed prepared by the preparation method. The invention relates to the technical field of aqua-feeds.

The invention discloses a technology for actualizing the inverse season hybridization fry breeding of java tilapia in a greenhouse constructed in winter, which belongs to the aquiculture industry. Theinvention is realized according to the biological characteristics that the sexual gland of the parent fish of the java tilapia which only eats baits at the water temperature below 23 DEG C can not develop, and the sexual gland begins to develop when the water temperature reaches 23 DEG C and is stabilized at more than 23 DEG C so as to lay eggs and hatch fries. The characteristic that the temperature of the greenhouse of a fish pond in winter can be increased and preserved at more than 23 DEG C is utilized. The heat-insulating property of the greenhouse is good and can reach the physiologicalrequirement of the growth and development of the java tilapia. Along with the raise of temperature at the beginning of spring, the water temperature in the greenhouse is raised more quickly and is stabilized at more than 23 DEG C. Therefore, the pure bred fries of the java tilapia can be hatched by adopting an inverse season fry breeding technology. The fry emergence period of the fries of the java tilapia can be advanced by 2 months for fry emergence by utilizing a greenhouse indoor temperature control fry breeding technology in winter, the greenhouse constructing cost is low, the managementis convenient, the technology is easy to master, popularize and universalize, the operability is strong, and the lowering of the breeding cost is an effective approach for enhancing the breeding superior variety coverage rate of the java tilapia, increasing the yield and enhancing the quality of a product.

The invention provides a breeding method of tilapia. The breeding method comprises the steps of performing intra specific hybrid breeding for new Gift tilapia and Sudan tilapia to obtain the first filial generation tilapia; performing interspecific hybrid breeding by using raun of the first filial generation tilapia as a female parent and milter of blue tilapia as a male parent to obtain the hybrid generation which is the tilapia. According to the method, the breeding technology combining specific hybrid breeding and interspecific hybrid breeding of tilapia is adopted; various outstanding properties are collected; therefore, the output of fries and male rate of the later generations are increased, and as a result, the breeding output and benefits of tilapia are increased. The invention further provides tilapia bred through the breeding method; the tilapia has the advantages of being high in output of fries and male rate of the later generations.

The invention discloses an egg producing method for YY-type supermale tilapia capable of self-reproduction, which belongs to the technical field of tilapia culture. The technical proposal of the method has the key point of mating WY-type tilapia as a female fish with YY-type supermale tilapia nilotica for reproduction. The method has the advantages of scientificity, simplicity and high speed, and is used for producing the eggs of the YY-type supermale tilapia.

The invention provides a tilapia culture method, which mainly comprises the steps of preparing a pond, breeding fish fries, culturing and harvesting adult fish, wherein during a culturing process, a compound feed is fed twice a day, the feeding volume is 2 to 3 percent of the total weight of fishes, and the compound feed is prepared from 90 to 100 parts of basic fish feed, 1 to 8 parts of Chinese herbal medicine and 2 to 6 parts of probiotics. According to the tilapia culture method provided by the invention, the tilapia fries are started to be cultured in the season with mild temperature, and the feed added with the Chinese herbal medicine and the probiotics is fed, so that the tilapia fries grow quickly; the growth and propagation of pathogenic microorganisms can be inhibited, so that a fish body has a favorable digestion inner environment, tilapia can better digest and absorb nutrition components contained in the feed, and the feed conversion rate is improved; an immune system of the tilapia can be stimulated, so that the disease resistance of the fish body is improved; the probiotics can provide an acidic environment during a metabolic process, so that the propagation of the pathogenic microorganisms is inhibited; the meat quality of the tilapia can also be further improved.

The invention discloses a culture method for tilapia breeding based on a bio-flocculation technology. According to the bio-flocculation technology, through assimilation and absorption of microbial communities to inorganic nitrogen in aquaculture water, cordate houttuynia in the floating bed can absorb and assimilate excess nitrogen, phosphorus and organic matter in the pond culture process to purify the water in the pond. The formed bio-flocculent can be used as feed protein, so that secondary utilization of bait protein is realized, the growth of tilapia is promoted, and the utilization efficiency of bait is improved. In addition, cordate houttuynia as a medicinal plant can provide food for tilapia in the process of culture, which is conductive to the improvement of the immune performanceof the fish body. By combining the advantages of the bio-flocculation technology and the cordate houttuynia floating bed technology, an obvious regulation effect is achieved on the water quality of pond culture, and water self-purification is promoted. Moreover, the non-specific immunity of tilapia can be obviously improved to a certain extent, and the yield of tilapia can be increased.