95 results about "Rice field eels" patented technology

The invention relates to a method for cultivating swamp eels and a device thereof and pertains to the technical field of agricultural cultivation, which is used for solving the problem of industrial high-density cultivation of the swamp eels under the unnatural conditions. The technical proposal thereof is that a three-dimensional multilayer small-area controllable water level combined-typed cultivating pool is arranged at the heliophobe indoor; according to the living habits and requirements of the best growing environmental conditions of the swamp eels, water source, the conditions of water quality, breeding density and bait proportion are configured for cultivating the swamp eels. Meanwhile, the three-dimensional combined-typed cultivating pool, a filtration pool, a deposition pool, an oxygenation pool, a dosing pump, a disinfector, a thermostat, and the like, form a closed water cycle system. And the problems of water supply, filtration, deposition, disinfection, constant temperature, constant flow, oxygenation, pollution discharge, and the like, under the condition of high density cultivation are solved in the cycle. By applying the method and the device of the invention, the swamp eels can be cultivated all the time without the influences of season and climate, and the large-scaled industrial cultivation of the swamp eels which are excellent special aquatic products can be realized.

The invention belongs to the aquaculture technology field, in particular relating to an artificial control method for the improvement of female finless eel parent fecundity. The finless eel has special physiological phenomena and sex reversal characteristics with small size, large egg granules and low fecundity. Thus the scale finless eel propagation is subject to the restrictions of the female finless eel parent self-conditions. In the invention, through the artificial simulation of female finless eel culture and development environment, the rational selection of parental finless eels, the reasonable stocking density arrangement, the appropriate feeding and management methods, the pre-oviposition period intensive culture and the artificial control measures, the female finless eel fecundity in natural state can be enhanced to the fecundity up to 450 to 1300 grains each and the 680 grains average level from 170 to 650 grains each and the average 260 grains. Therefore, the average fecundity of finless eel is improved by 161%.

The invention relates to a method for improving the survival rate of rice field eels in the transportation process and belongs to the technical field of fish culture. The method comprises the following steps: (1) temporary culture of the rice field eels, i.e. transferring the rice field eels to be transported into a temporary culture net cage to carry out temporary culture for one day, stopping feeding and placing few loaches into the temporary culture net cage; (2) preparation and bagging of water for transportation, i.e. dissolving vitamin C and astragalus polysaccharides in water, wherein the vitamin C being added is in an amount of 10g/m3, and the astragalus polysaccharides being added are in an amount of 3g/m3, simultaneously regulating the pH value into 7.0 to 7.5, placing the rice field eels and the water for transportation into a special oxygen bag for aquatic products according to a ratio of 1:1, filling oxygen and sealing, wherein the oxygen content is 6mg/L; and (3) the transportation of the rice field eels, wherein the water is changed for once at intervals of 6 hours in the transportation process so as to ensure that the dissolved oxygen content of the water in the bag is always over 6mg/L and ensure that the pH value is always in the range of 7.0 to 7.5. According to the invention, the vitamin C and the astragalus polysaccharides are added into the water for transportation of the rice field eels, so that the anti-stress capacity of the rice field eels is improved, the stress response, the injury and the death of the rice field eels in the transportation process are effectively avoided, the survival rate of the rice field eels in the transportation process is successfully improved, and a reliable transportation technology is provided for solving the problem of a rice field eel artificial propagation technology and improving the economic benefit of the rice field eels.

The invention relates to a method for artificial mass propagation of rice field eel seedlings, and belongs to the technical field of scientific application of fishery. The method is characterized by applying oral oxytocic hormone to rice field eels, namely feeding parent rice field eels with a certain dosage of oxytocic hormone by using animal bait as a carrier of the oxytocic hormone; and the method comprises the following steps of: stopping feeding of both male and female parent rice field eels for 1 day before spawning induction; observing oestrus conditions of bubbling and nesting of the male and female rice field eels in 3 to 4 days after the male and female rice field eels ingest an oxytocic hormone liquid medicament, and surrounding and marking nests with eichhornia crassipes after the nesting of the parent rice field eels is finished, wherein an inner net cage in a paddy field is used as a spawning pond; and naturally inseminating the parent rice field eels in the spawning pond, breaking membranes by fertilized ova and emerging seedlings after 144 hours, inhabiting all fish fries in the eichhornia crassipes surrounding the nests of the parent rice field eels after the fish fries break the membranes after 96 hours, and collecting the rice field eel seedlings at the time. By applying the method of the invention, the spawning induction ratio of the parent rice field eels reaches 80 to 90 percent, the hatching rate of natural spawning and fertilization is over 95 percent and the collection ratio of the rice field eel seedlings is over 95 percent.

The present invention is one kind of cement pond for raising rice field eel with aquatic weed, rather than clay, inside it. After the pond is built, aquatic weed with developed roots is set inside the pond and water and feed are added into the pond. The raising pond is 2-20 sq m large and 50-60 cm deep and has arced peripheral, brick raised into the pond port, water draining and overflowing pipe 1 cm lower than pond bottom and 70-80 mesh filtering screen. The pond may be used in producing rice field eel of high quality and no pollution.

The invention discloses a construction method for a micro-ecosystem. The construction method comprises the steps of constructing a micro ecological pond, wherein the depth of the pond is 0.4-0.6m, a mud pile with height of 15-20cm is arranged in one eighth to three eighth area of the bottom of the pond and a sand pile is additionally arranged above the surface of water in the pond; arranging a water supply and drainage system and controlling the depth of water in the micro ecological pond to be 12-14cm; collecting and fermenting human manure; cultivating earthworms and fly maggots: introducing the earthworms and the fly maggots into the micro ecological pond; planting leaf vegetables on the mud pile in spring and summer and planting watercress in autumn and winter; putting loaches, rice field eels, tortoises and Procambarus clarkii respectively according to standards of 20 loaches per square meter, 4 rice field eels per square meter, 4 tortoises per square meter and 1 pair of Procambarus clarkii per 10 square meters. The construction method for the micro-ecosystem is suitable for cultivating the fly maggots and the earthworms by using domestic wastes, the biological wastes are enabled to become green foods of people by cultivating aquatic animals and planting aquatic vegetables, and for the nation, not only can the eutrophication of natural water bodies be prevented, but also the commodity price can be stabilized.

The invention relates to the technical field of breeding of rice field eels, in particular to a high-efficiency ecological three-dimensional breeding technology. The high-efficiency ecological three-dimensional breeding technology mainly comprises a set of complete ecological three-dimensional breeding mode for the rice field eels. The technology comprises contents such as site selection, net cage arrangement, aquatic plant planting and matching of fish species, wherein the matching of fish species is the core; a pool of about 10 mu is selected; micro-pores are arranged for oxygenation; knotless polythene net sheets are adopted by net cages; the area of each net cage is 6 m<2>, the depth is 1 m, and the depth of the part of the net cage immersed in the water is 0.5 m; the net cages are fixed by using brackets and are arranged in a straight line at an interval of 1 m and a row spacing of 2 m; the total area of the net cages does not exceed 50 percent of the total area; alternanthera philoxeroides are planted in 50-60 percent of the area of the net cages; after water is sterilized for 15 days, 5,000 pseudobagrus fulvidracos, each of which has the weight of 10 g, 1,000-2,000 loaches, each of which has the weight of 3-5 g, 100-500 silver carps, each of which has the weight of 100-500 g and 50-200 spotted silver carps, each of which has the weight of 50-500 g are bred per mu; 2 kg/m<2> of eels, each of which has the weight of 20-50 g, 5 loaches/m<2> and 1-2 toads, each of which has the weight of 10-100 g are bred in each cage; the eels seeds are soaked with 2 percent salt solution for 10-20 minutes before being put in the cages so as to prevent the occurrence of saprolegniasis.

The present invention discloses a water loosing preventing rice field eel feed and a preparation method thereof. The rice field eel feed is made of the following raw materials in parts by weight: 20-30 parts of high-gluten flour, 10-15 parts of bone meal, 70-90 parts of fresh silver carps, 20-25 parts of corn oil, 80-100 parts of soybean meal, 2-3 parts of complex enzymes, 35-50 parts of wheat bran, 2-3 parts of gelatin powder, 8-10 parts of fresh pork liver, 3-5 parts of edible salt, adsorbent and an appropriate amount of water. Specifically, the water loosing preventing rice field eel feed can wrap a thin film on the surface of the conventional feed, enables feed particles to present a longer time in the water without needs of spreading feed frequently, and can also prevent the adverse impacts on rice field eels caused by water eutrophication. The addition of pork liver enables fresh and delicious smell of the rice field eel feed, which is line with the smell of food when the rice field eels are seeking food, thus is helpful for the food intake of rice field eels.

The invention belongs to the field of aquaculture, in particular to a large-scale artificial hatching method of fertilized ovums of rice-field eels. The large-scale artificial hatching method is characterized in that the artificial hatchability can be improved to above 90%, and a technical system can be provided for an imitative ecological large-scale breeding by taking neural embryos as artificial hatching starting points, applying special hatching facilities, and continuous dripping for oxygenation and other methods. The large-scale artificial hatching method comprises the following steps: 1) building special hatching facilities, and installing a water storage tank, a hatching tank and a dripping facility sequentially according to a high position difference; 2) adopting an imitative ecological breeding method to obtain the fertilized ovums of the ricefield eels, transferring the fertilized ovums to a hatching box to hatch when the fertilized ovums naturally develop to a neural embryonic period in a foam nest; 3) paving the neural embryos in the hatching box, keeping the embryos 1cm far away from the water surface, and promoting the neural embryos to develop by adopting a dripping method for oxygenation; and 4) continuously leaving baby eels to cultivate in the hatching box temporarily after the baby eels come out of membranes, feeding until the eels is 5cm long through opening and tamping and then transferring the eels to a net cage or other facilities to continuously feed.

The invention discloses a method of culturing eels, comprising the steps of: firstly adopting places with abundant water source of a pond, a pool, a ditch, a rice paddy and the like as a culture pond; secondly, arranging a species complementary culturation platform, throwing in angleworms; thirdly, preparing the pecies complementary culturation platform, which is arranged in a cinquefoil form, the platform is higher than water surface, the culturation platform is mixedly stacked, stacking time is decided on air temperature, the angleworm are inoculated at 1 cm near the water surface after retting, the eels can freely ingest after 20 days, added for one time according to diet consumption of the culturation platform. The invention method is simple, convenient in operation, wide in material source, low in cost of investment, low in labor intensity, high in producing efficience.

The invention discloses a feed of rice field eels, comprising the following components in parts by weight: 20-30 parts of buckwheat, 12-15 parts of cardamine, 10-13 parts of corn flour, 15-20 parts of fish meal, 10-13 parts of shrimp meal, 5-10 parts of tubificidae meal, 5-6 parts of chicken liver, 4-7 parts of roe powder, 5-8 parts of rice bran, 3-5 parts of brewer yeast powder, 1-2 parts of spirulina powder, 5-6 parts of bran, 5-8 parts of wheat straws, 3-5 parts of red bean flour, 3-5 parts of kelp powder, 1-3 parts of citric acid, 2-4 parts of monocalcium phosphate and a proper amount of table salt. The feed provided by the invention is an ecological and green fish feed, and is capable of obviously improving the disease resistance of rice field eels, greatly enhancing the survival rate of rice field eels, increasing the growth rate of rice field eels, improving breeding benefits and lowering feeding costs when being used for feeding rice field eels.

The invention discloses an artificial bionic method for breeding rice field eel fries in net cages. The method comprises steps of net cage manufacturing, float grass planting, parent selection, proper fry throwing, fry cultivation and the like. The method has the characteristics of low parent mortality, high spawning rate, high fry survival rate and low fry cost. The net cages can be used for simulating the natural growing environment of rice field eels, so that the probability of invasion of rice field eels by natural enemies in a breeding process is lowered; a high-nutrition mixed feed is adopted, so that the growing speed and spawning rate can be increased; the feed is applied at a temperature which is most suitable for the growth of rice field eels, so that the spawning rate of rice field eels is further increased. According to the artificial bionic method for breeding rice field eel fries in net cages, the defects of the prior art are overcome, the production cost of fries is lowered, the profit of culturists is increased, the market demand is met, and a very good market prospect is achieved.

The invention relates to a Chinese dietary preparation which is prepared from Chinese angelica root 10g, two pieces of rice field eel, fresh ginger 7 slices, and rice 50g. The preparation is effective in treating hyphemia.

The invention discloses a rice field eel pollution-free high-density tube farming device which comprises a rice field eel tube farming pond or a net cage, wherein a cave nest is arranged in the rice field eel tube farming pond or net cage; the cave nest is formed by stacking tube nests; each tube nest is a PVC (polyvinyl chloride) tube or phyllostachys pubescens with the diameter of 3-4cm and the length of 0.8-1m; the holes at the two ends of the tube nest are polished to be smooth; the tube nests are vertically placed on two bamboo rafts or wood rafts flatwise; and 2-3 layers of tube nests are placed on every two bamboo rafts or wood rafts to form the cave nest. According to the invention, the rice field eel tube farming pond provides a relatively good stereoscopic cave-living environment, and the shortcomings of the existing common rice field eel ponds are overcome; the device disclosed by the invention can be popularized to all regions so as to realize pollution-free high-density farming of the rice field eel which is a high-quality aquatic product; and the water resources are saved to the greatest degree, and the increasing needs of consumers are met.

The invention discloses a cage raising method for rice-field eel offspring seeds, and aims to provide a cage raising method for the rice-field eel offspring seeds based on the conventional rice-field eel breeding method with an innovative scientific principle. By adopting the cage raising method, labor force is saved greatly, the death rate of the rice-field eels is lowered, the yield of the rice-field eels is increased, and the aims of high yield and high quality are fulfilled. The method comprises five steps in total.

The invention discloses selenium-rich feed for improving immunity of rice field eel and a preparation method thereof. The selenium-rich feed is prepared by mixing selenium-rich grain meal, imported fish meal, chicken meal, molasses yeast, squid organ meal, rapeseed meal, soybean meal, refined fish oil, whole-milk soybean meal, soybean lecithin, vitamin complex, composite mineral salt, monocalcium phosphate, choline chloride and allicin. The invention solves the problems that the rice field eel artificially cultured by the existing feed has low immunity and is susceptible, the sick rice field eel is hard to cure with common medicines and the rice field eel is relatively sensitive to common medicines. The selenium-rich feed disclosed by the invention does not obviously influence the productivity of rice field eel, and can obviously improve the activity of plasma superoxide dismutase of the rice field eel (P<0.05), remarkably reduce the content of malonaldehyde in the plasma (P<0.05), improve the immunity of the rice field eel and avoid infection.

The invention provides a mimic-ecological soil breeding method of rice field eels. The mimic-ecological soil breeding method comprises the specific steps: (1) selecting a breeding place; (2) building a parent rice field eel culture pond; (3) selecting parents; (4) culturing the parents; (5) breeding and hatching, and separating; and (6) culturing young rice field eels. The breeding rate of the rice field eels can reach 85%-95%, the hatching rate of natural spawning fertilization can reach 99% or more and the collection rate of fries can reach 97% or more; large-batch and high-quality rice field eel fries can be provided so that the requirements on the fries by large-scale rice field eel culture are met; and the method has a very good application prospect. Furthermore, the rice field eels are bred with a net cage and the method is easy to operate; the bred rice field eel fries are easier to capture, the working amount is small, the production cost is low and the water quality is easy to manage; and the problem that the rice field eel fries is difficult to capture is solved and the industrial large-scale production of the rice field eel fries is easy to realize.

The invention discloses a mixed aquaculture method of loaches and rice field eels. The mixed aquaculture method comprises the following steps: constructing a pond with a water inlet and a water outlet, paving sludge in the pond, storing water, cultivating water, feeding aquatic plants, putting in disinfected fish fries, then specially quantitatively feeding baits at fixed time regularly, and performing water changing and disease prevention. The method is simple and practical, easy to operate, low in aquaculture cost, sufficient in dissolved oxygen of a water body and multiple in nutrients of the water body; fat and strong loaches can be beneficially cultivated by matching feeding of livestock offal; the 'three fixed' fed baits can meet the growth demands of loaches; and in addition, the additives in the baits can prevent the occurrence of epidemic diseases with the efficiency of up to 95%, the yield per mu of loaches can be increased by 6-8% after loaches are normally cultivated for seven months, each loach is 15cm long, the yield per mu of rice field eels is increased by 5-7%, the average weight of each rice field eel is above 80g, and the economic benefits can be increased by 15%.

The invention provides an immunity-enhancing rice-field eel feed. The immunity-enhancing rice-field eel feed comprises the following ingredients: choline chloride, table salt, calcium hydrogen phosphate, gluten powder, corn starch, tubificidae powder, a compound vitamin additive, roe powder, a compound mineral additive, Pu-erh tea residues, esterified vitamin C and a Chinese herbal medicine feed additive. The Chinese herbal medicines can be utilized in the feed so as to improve immunities of the rice-field eels; the compound vitamin additive and the compound mineral additive are matched in the feed so as to regulate nutrients in the rice-field eel bodies, so that meat textures and tastes of the rice-field eels are improved; moreover, the Pu-erh tea residues, the tubificidae powder, the roe powder and the esterified vitamin C are matched, so that the feed can be absorbed by the rice-field eels more easily after eating without causing anorexic conditions.

The invention discloses application of sodium butyrate to a feed for rice field eels, and a feed for the rice field eels. The content of fish meal in the feed is smaller than 35 percent, the content of plant protein sources in the feed is greater than 40 percent, sodium butyrate is added to the feed, and 0.5-1g of micro-capsule sodium butyrate is added to each kilogram of feed. According to the feed, sodium butyrate is added to the feed for the rice field eels in a manner of a feed additive, mainly aiming at the problems of high price of the fish meal, high formula cost, and structural damage of an intestinal tract form and reduced immunity and growth caused by reduced content of the fish meal in an aquatic feed formula and consumption of a large quantity of plant protein sources, the intestinal tract form of the rice field eels is effectively restored, the absorbing capacity of the intestinal track and the immunity of an organism are enhanced, the growth of the rice field eels is promoted, the feed utilization rate is increased, the application of the plant protein sources in an aquatic feed is improved, the feed cost is lowered; meanwhile, the feed is simple in adding manner, low in cost and remarkable in benefit.

The invention relates to the field of aquaculture, and specifically relates to a culturing method of rice-field eel. According to the invention, a good growth environment is provided, such that resistance and adaptability of young eel are improved. Surrounding climatic temperature is maintained, and a high-quality bait feed is fed, such that the rice-field eel survival rate is high, and development and growth of rice-field eel can be stimulated. With the method, the rice-field eel growth speed is faster, and the rice-field eel quality is better, such that good economic benefit can be obtained.

The invention discloses an ecological breeding method for aquatic vegetables or flowering plants and rice field eels. The ecological breeding method comprises the following steps of (a) building a cement breeding pond, using unslaked lime water to soak the breeding pond for three to seven days after the cement breeding pond is built, then adding clear water to soak the pond for 15-30 days till green moss grows at the pond bottom; (b) planting the aquatic vegetables or the flowering plants in the cement breeding pond; (c) performing eating training before eel fries are put into the cement breeding pond, wherein an eating training method is that baits are not provided two to three days before the eel fries are put into the cement breeding pond and are provided in a later period; (d) putting the eel fries into the pond, wherein the conditions are that the water temperature is 25-28 degrees, the day-and-night temperature difference does not exceed 5 degrees, the breeding density in the pond is 1.5-2kg eel fries per square meter, feeding is not performed three to six days before the eel fries are put into the cement breeding pond, and the baits are provided from the fourth to seventh day. By adopting the ecological breeding method for the aquatic vegetables or the flowering plants and the rice field eels, the rice field eels, the aquatic vegetables and the flowering plants are cultivated in a mixed mode, an excellent growing environment is provided for the rice field eels, and the rice field eels are high in yield, good in quality, non-toxic, harmless and pollution-free.

The invention discloses an extraction method of antibacterial peptide of rice field eel. With the liver and intestines of rice field eel as raw materials, the antibacterial peptide of rice field eel with molecular weight of about 6,500Da is obtained by the steps of preparing a crude product of antibacterial peptide and purifying the crude product of antibacterial peptide; and the antibacterial peptide has the advantages of strong resistance to heat and freeze thawing, stable antibacterial activity and relatively strong killing effect on aeromonas hydrophila, escherichia coli and staphylococcus aureus.

The invention provides a preparation method of a fermented traditional Chinese medicine for preventing and treating intestinal diseases of aquatic products. The fermented traditional Chinese medicineis also called a bacterial medicine, water is added into a traditional Chinese medicine composition, compound fermentation strains are inoculated, and fermentation is performed to obtain the fermentedtraditional Chinese medicine. The invention further provides the corresponding fermented traditional Chinese medicine. The fermented traditional Chinese medicine has the functions of internally strengthening digestive absorption, nourishing stomach and protecting liver and externally resisting mushroom poisons and killing pathogens, and is used for preventing and treating the intestinal diseasesin aquaculture and applicable to prevention and treatment of the intestinal diseases of special aquaculture animals such as various saltwater fishes, freshwater fishes, shrimps, crabs, sea cucumbers,turbots, bastard halibuts, large yellow croakers, snappers, sea eels, globefishes, rice field eels, soft-shelled turtles and ictalurus punctatus. The fermented traditional Chinese medicine has good effects on the intestinal diseases such as white intestine diseases, empty stomach, white discharge and hangover caused by bacteria, viruses and antibiotics, and particularly has special effects on fatal diseases of the shrimps caused by enteritis, white discharge, empty intestines and empty stomach.