CN1425281A - Large-scale artificial breeding technology for yellow cartfish - Google Patents
Large-scale artificial breeding technology for yellow cartfish Download PDFInfo
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Abstract
The large-scale artificial breeding technology of yellow cartfish includes breeding parent fish, determining induced spawning time, setting up brick fish nest with egg attaching baskets, injecting spawning inducing agent, hatching, fry raising, timely throwing in the pond, domestication, pond management and preventing diseases. The spawning inducing agent for each Kg of fish includes HCG 3000-4000 IU, LHRH-42 10 micrograms and DOM 5-10 mg. Fish egg before hatching is twice treated with malachite green solution of 7-8 mg/L concentration for 10-15 min and the dissolved oxygen content in water is higher than 4 mg/L during hatching.
Description
Affiliated technical field
The present invention relates to the breed of fresh-water fishes, a kind of large-scale artificial breeding technology for yellow cartfish.
Background technology
Yellow cartfish is the widest a kind of in distribution region in the Chang section fish, and China is except that western plateau and Xinjiang, and each water system all has distribution.Because of its adaptability is strong, advantages such as fine and tender taste more and more are subjected to culturist's favor.Supply falls short of demand owing to wild seed, so the research of artificial propagation yellow cartfish has just become numerous waterman authors' important topic.That early carries out experimental observation in this respect has Du Jinrui [1], a Wang Lingling [2] etc., report [3-9] is arranged again in recent years more, wherein document [4], [8] are to the report of the early stage work of the present invention, in addition have only document [9] that oxytocic drug and dosage etc. has been done detailed introduction; The identical mode of pushing down with bamboo bar and fragment of brick at the bottom of the skin grafts of employing palm more than prior art is provided with the fish nest tiling pond.This shows that the specification technique for the yellow cartfish artificial breeding does not also have formation, the information of more not seeing artificial breeding in enormous quantities.
Summary of the invention
Large-scale artificial breeding technology for yellow cartfish, comprise parent fish rearing, determine the opportunity of hastening parturition, the fish nest be set, the pool is supported, descend to injection ocyodinic, hatching, fry temporarily in good time, tame throw something and feed, management and diseases prevention, it is characterized in that each link of breeding all requires meticulous assurance: reinforced cultivating is carried out in parent fish rearing when water temperature is higher than more than 12 ℃ in spring, day feeding volume accounts for fish body weight 3-5%, it is 150 kilograms/mu that ripe fish density is not more than, and cultivates coolant-temperature gage autumn last year and stops below 12 ℃ the time to feed; Determine the opportunity of hastening parturition: water temperature reaches 22-26 ℃, and parent population weight requires the raun cabrage more than the 75-100 gram, and raun must reach the outward appearance ripeness standard, and the milter cabrage is more than the 100-150 gram.The fish nest is set: put into a rectangular slot with 6 bricks in pond bottom, at two ovum frames of groove inner bottom part lay, the 50-60% of parent population group of hastening parturition established nest quantity and is by mutual group adult fish nest, and the parent population group was by 1: 1 combo; The injection ocyodinic: drug regimen adopts human chorionic gonadtropin (HCG), luteotropin releasing hormone d-ala analog (LHRH-A
2), maleic acid DOM (DOM), dosage: HCG3000-4000 IU+LHRH-A
210 μ g+DOM5-10mg/kg fishes, soup is no less than the 1ml/100g fish; The processing of ovum during hatching: before hatching ovum was embathed 10-15 minute with the 7-8mg/L malachite green solution, hatch and embathe once after 15-20 hour again, the dissolved oxygen of water is not less than 4mg/L between the incubation period; Fry is supported temporarily: fry density is at 2-3 ten thousand tails/m
3, the depth of water is no more than 1m, and dissolved oxygen is not less than 4mg/L; The wheel animalcule of throwing something and feeding after 48 hours, the quantity of throwing something and feeding is with 50-100 wheel animalcule/ml degree of being; The in good time down pool: fry is supported temporarily and begins after 5-6 days to disperse to move about, and reaches flat free state, can the following pool, put seedling density 3-5 ten thousand tail/mus; Domestication is thrown something and fed: the pool 20 days under the fry, grow to about 35mm, need tame and throw something and feed, domestication, is crossed the 1mm sieve and is pulverized a small amount of powder Jia Shui of back blending and become bulk to feed based on fish meal with bait, management and diseases prevention: breeding spand water can not overfertilization, and the transparency of water remains on more than the 40cm.
Large-scale artificial breeding technology for yellow cartfish has solved a difficult problem that limits this kind fish large-scale promotion, makes this economic worth height, and the kind that is suitable for popular breed is developed rapidly.
Embodiment 1, parent population
1.1 parent population is chosen: the cabrage that raun specification, pond are formed must be more than 75g, and the cabrage that catch in natural waters must be more than 100g; The milter specification is corresponding more than 100g-150g.
1.2 transportation: long-distance transport must keep low-density, to reduce the phase mutual friction and to stab.The fish and water weight ratio is not more than 1: 10, will embathe with the potassium permanganate of 20mg/L concentration 10-15 minute before putting into the pond.
1.3 parent fish rearing: begin to carry out reinforced cultivating spring when water temperature is higher than 12 ℃, for well,, add normal additive of raising the consumption twice and be extruded into group through meat mincer with the red dog flour of not rotten freezing sea fish mix 3-5% with the moist mixed feed of the bulk of throwing something and feeding.Of fixed place and time throwing something and feeding, every day at the upper and lower noon respectively throws something and feeds once, throws something and feeds less the morning and throws something and feeds afternoon more, and total amount accounts for fish body weight 3-5%.
Cultivate autumn last year also very importantly,, should pay attention to nutrient balance, should suitably replenish the fresh and alive trash fish of throwing something and feeding based on what feed pellet except that by the normal aquaculture management; Should suitably replenish the pellet of throwing something and feeding based on what feed fish, and the water temperature of adhering to throwing something and feeding stop again when being lower than 12 ℃ hello.
Parent population breeding density should be greater than 150kg/ mu when cultivated spring, and the depth of water should be filled into 1.2m-1.5m gradually from 0.5m.
2, hasten parturition (the injection ocyodinic is laid eggs it)
2.1 determine the opportunity of hastening parturition: need satisfy two conditions the good opportunity of hastening parturition, the one, water temperature condition must reach 22～26 ℃, and another condition is to select ripe good parent population.Ripe good appearance standard is; The raun belly expands, and the ovary profile is obvious when holding up on the primary drying; Cut that the visible ovum grain of ovary is full, explanation ovum grain separates open; Mature coefficient (the heavy percentage of liveweight percentage of ovary) reaches about 15%.
2.2 the fish nest is set: yellow cartfish has the nest of doing (nest) spawning habit.Artificial fish nest must bionical attitude setting.Method is to stand at the bottom of cement pit with 6 bricks to put into a rectangular slot, and the groove inner bottom part is laid two ovum frames, mutual group adult fish nest.Ovum frame is a palm bark to be sewn on one 25 * 37 centimetres the quadrangle iron wire frame make.Test shows that this fish nest connects the groove of ovum effect than 4 brick pendulum, the small fish nest effective (as table 1) of interior shop palm sheet.
Table 1 connects the ovum effect relatively with criticizing the large and small nest of fish of hastening parturition
| Spawning pond number | The group of hastening parturition number | Total fish nest number | Big fish nest | The small fish nest | Always connect the ovum number | ||||
| Number | The ovary number is arranged | Ovary % is arranged | Number | The ovary number is arranged | Ovary % is arranged | ||||
| ????1 | ??78 | ??71 | ??3 | ????3 | ????100 | ??68 | ????30 | ??44.1 | 17.5 ten thousand |
| ????2 | ??75 | ??51 | ??30 | ????22 | ????73.3 | ??21 | ????3 | ??9.5 | 38.5 ten thousand |
The fish nest can also be made garden tubular wall with metal or plastic material, the palm sheet that is sewn on the ring frame in tube inner bottom surface shop.With 150% of male fish length is the diameter of standard as circular fish nest, and big fish is used big nest, and small fish is used nidulus, can be more economical, more effectively connect ovum.
Cloth nest quantity should be 50～60% of the fish group number (male and female were by 1: 1 combo) of hastening parturition.The fish nest cross on the ovum frame at most to adhere to ovum too rare, it is low and be unfavorable for next step hatching management to connect ovum efficient.The fish nest crosses that I haven't seen you for ages influences the spawning rate of fish, and attached ovum increase in density also is unfavorable for hatching.
2.3 the injection ocyodinic, has just been established behind the fish nest formally injectable drug and has been hastened parturition at the select parent population.Drug regimen is human chorionic gonadtropin (HCG)+luteotropin releasing hormone d-ala analog (LHRH-A
2)+maleic acid DOM (DOM).The medicament proportioning is HCG4000IU+LHRH-A
210 μ g+DOM5mg/kg fishes are at HCG3000～4000IU+LHRH-A
2About 10 μ g+DOM5～10mg/kg fish scope all has positive effect, sees Table 2.
Table 2 various dose, the different batches effect of laying eggs
| Ocyodinic is hastened parturition raun cabrage milter cabrage egg laying amount group equal spawning and fertilization rate date amount group number (gram) (gram) (ten thousand) amount (grain) (%) |
| 6.30 normal dose 103 92.9 191.1 23.0 2,233 62.9 7.02 low dosages 100 83.7 140 9.0 900 50.2 7.09 high doses 70 86.9 134 8.0 1,142 56.3 normal doses 70 94.6 135 18.5 2,642 69.5 7.12 normal doses 140 103.8 155.2 40.0 2,857 78.7 7.14 normal doses 153 102.1 127 56.0 3,660 87.2 7.17 normal doses 150 86.1 125 50.0 3,333 85.9 7.19 normal doses 154 93.9 125.4 40.0 2,597 78.4 7.22 normal doses 180 65.1 125.7 27.0 1,500 68.5 7.26 normal doses 70 68 110.6 6.0 857 57.6 |
1) normal dose is HCG4000IU+LHRH-A
210 μ g+DOM5mg/kg fishes.
2) low dosage is HCG3000IU+LHRH-A
210 μ g+DOM5mg/kg fishes.
3) high dose is HCG4000IU+LHRH-A
215 μ g+DOM10mg/kg fishes.
Concentration is unsuitable too high or too low during the soup preparation, and for suitable, cabrage is pressed the lml/100g injection when 100 grams are above with 50～100g fish injection 1ml.The too high injection site of pharmaceutical quantities plays lump easily, crosses low then injection volume and increases, time-consuming, absorb slow.
The injection site is a base portion behind the dorsal fin, and pin is tiltedly played in injection forward, about depth of needle 1cm, adopts shot method.
The parent population condition is selected in the injected dose strictness, to adopt HCG3000IU+LHRHA
210 μ g+DOM5mg/kg fish dosage are economical, and are expected to obtain effect.Under the enough situations of manpower, adopt 2 injections can obtain better effect, for the first time a LH injection RH-A
2Dosage, 10 hours later amounts of HCG injection and DOM again; Milter is not injected for the first time, 2/3 of three kinds of compound formulation doses of milter injection for the second time, i.e. 0.7ml/100g fish.Adopt shot method personnel more after a little while.
Under 25 ℃ of water temperature conditions, 18～20 hours parent populations in injection back can lay eggs, and reach spawning peak in about 30 hours, and every batch of fish lays eggs and lasts about 15 hours.Ordinary circumstance is pulled out fish at dusk, and as seen the injection of hastening parturition evening had fish to lay eggs at dusk to second day, peaked to laying eggs after midnight, and basic the end laid eggs after daybreak.Embryonic development observed result and above-mentioned situation are coincide.
2.4 the antenatal management spawning pond depth of water keeps 0.5～0.8m, remains miniflow water, injects and intermittently carries out big current stimulation after 10 hours, flow is at 30～50m
3/ h (3～4 writing brush) washed by water about 1 hour at every turn, intermittently dashed after 20-30 minute again, washed by water 3-5 time; To the multiple miniflow water of the time ash of laying eggs, keep spawning place peace and quiet, lucifuge.Spawning pond is put fish density with 1 group/m
2The water surface is for suitable.
3, hatching
3.1 hatching m large-scale artificial breeding technology for yellow cartfish of the present invention has adopted the hatching of 3 kinds of hatching ms (1) conventional incubation circuit, (2) establish the hatching of net cage flowing water in cement pit, and (3) are hydrostatic inflation hatching in cement pit.Three kinds of methods all obtain better hatching effect, and average incubation rate is all more than 70%.If but hatching water filtered precipitation, then (1) kind method accumulates dirt easily and makes the water quality variation, incubate seedling after fry not easily separated yet.(2) kind net cage hatching, can on the case bottom surface, sew on the thicker polyethylene plastic film of one deck again and reduce the fry friction.(2) (3) method can be selected according to actual conditions.
3.2 hatching facility net cage is made by 60-80 mesh sieve thin,tough silk, specification is 2 * 1.2 * 0.5 meter, ties up and is propping up in water on the steel bar framework, and the water surface is given prominence in the net cage upper edge.During hatching with the ovum frame vertical hanging to the bamboo bar and place net cage, bamboo bar two ends ride on the net cage support, every case can hang 60 ovum frames, can hatch fish-egg 60～1,000,000.Also can build special-purpose hatchery, long 1.5～2 meters of pond, wide 0.5～0.7 meter, dark 0.5 meter, the hatchery face is smooth, 0.3～0.4 meter of the depth of water of remaining valid, the flowing water hatching, delivery port adds 80～100 mesh sieve thin,tough silk, the vertical inflow and outflow of water;
3.3 hatching management will carry out disinfection ovum frame before establishing the fish nest, fish-egg will embathe through 7～8mg/l peacock solution before hatching put into hatching water in 10～15 minutes again, hatch and embathe again once after tens hours, simultaneously ovum frame is rinsed in water and washed several times, again hatching again after the ovum of checkmating is rinsed, the good ovum of part is arranged in the ovum of rinsing, need to concentrate separately hatching.Note regulating current or aeration quantity, keep hatching water body dissolved oxygen to be not less than 4mg/l.
3.4 hatch results: obtained 277.5 ten thousand on ovum in 2000 altogether, fertilization rate reached is more than 75%, ten thousand tails surplus the hatching fry 150.
4, fry is supported temporarily
4.1 fall in time to pour storage pond, holding pond (groove) into after the fry of every batch of seedling all hatches and carry out supporting temporarily.The yellow cartfish seedling initial stage has the end of subsides, the habit of bunching, if no matter the untimely storage pond, holding pond that changes over to is foul in the circuit, dead ovum or net cage bottom friction, all is unfavorable for the fry survival.The Miao Shiying that falls separates foul as far as possible, mainly eliminates out foul by the method for clear water rinsing, and foul easily floats during stirring, and fry is still pasted at the end, needs to separate for several times repeatedly.
4.2 it is smooth to support environment and density temporary curing cement pond or flume wall temporarily, the degree of depth is advisable at 0.5～1m.Seedling density 2～30,000 tails/m temporarily breeds fish
3
4.3 support management temporarily, storage pond, holding pond also should build up picture front 3.The special-purpose pond of 2 described hatchings is such, stays to put the seedling hole, and the hydrostatic inflation is supported temporarily.Keep water quality pure and fresh, keep miniflow water or little inflation, make dissolved oxygen be not less than 4mg/L, change water once the every day of non-flowing water, and quantity of exchanged water is no less than 1/2.Experiment observes that to show that the yellow cartfish seedling is hatched after 48 hours anus open-minded, mouth is opened, the small-sized natural baits such as wheel animalcule of can ingesting, and will in time fish for wheel animalcule from the bait culture pond and throw something and feed this moment, feed 1～2 every day, and feeding volume makes temporarily foster water body reach 50～100 wheel animalcule/ml.Cutting off the water when throwing something and feeding 3～5 hours of miniflow water changes little inflation into.To keep the environment peace and quiet during supporting temporarily, hide high light.
5, descend the pool (fry is put in a suitable place to breed) in good time
5.1 fry self-condition: support temporarily after 5～6 days, it is flat that fry reaches flat swimming fully, can freedom about, about move about, disperse not bunch, be ready to paste the pool wall activity, color becomes the grey black look, at this moment fry almost completely changes the exogenous nutrition phase over to, should reach the pool at present.
5.2 pond condition: the pond of cultivation seed will be carried out routine 2～3 weeks and be cleaned up the pond, applies fertilizer before the pool under the fry; Natural bait is cultivated in water filling, and the wheel animalcule breeding peaks the phase when making under the fry pool; Also must establish shades such as woven straw before the pool under the fry, hide for fry along the pond week water surface.
5.3 fry is put situation yellow cartfish seed rearing in a suitable place to breed and adopts the main mode of supporting, preferred one-level cultivation is about to the spray fry and directly cultivates the autumn sheet.1) adopt the one-level method for breeding, breeding density is in 5～60,000 tail/mus, 2) adopt the secondary method for breeding, promptly fry grows to 35mm branch pond raising again more later on, and the density the during pool will be about 100,000 tail/mus under the spray fry like this; (summer flower fry) divides when supporting to about 35mm, and breeding density is at 2～30,000 tail/mus.
Table 3 calendar year 2001 yellow cartfish seed is put table in a suitable place to breed
| Pond number | Area (mu) | Breeding way | Put the seedling time | Put seedling amount (ten thousand tails) | Remarks |
| ??6 | ????10 | Collocation | ????7.09 | ????1.8 | Megalobrama amblycephala is the main body fish |
| ??13 | ????4.2 | Main supporting | ????7.11 | ????4.0 | Other fishes of not arranging in pairs or groups |
| ??10 | ????3.4 | Main supporting | ????7.13 | ????7.0 | Other fishes of not arranging in pairs or groups |
| ??7 | ????2.5 | Main supporting | ????7.15 | ????2.5 | Other fishes of not arranging in pairs or groups |
Calendar year 2001 is descended pond fish seedling 15.3 ten thousand tails altogether, and breeding density is 0.95～2.06 ten thousand tail/mu.
Throw something and feed with domestication 5.4 keep wheel animalcule breeding peak, put behind the seedling and will carry out single-dose application to the pond about 1 week, the bed mud work of rake pond with the numerous life of promotion zooplankton, is kept the numerous living peak of wheel animalcule.
The pool can be grown to about 20 days about 35mm under the fry, in time tame and throw something and feed.Domestication is major ingredient with the imported fish meal with bait, after the 1mm sieve is pulverized, mix a small amount of inferior powder Jia Shui and become bulk to throw something and feed, in the 10～15m scope of the one side in pond, throw 3～5 feeds afternoon every day, after one week the throwing scope of raising is dwindled, focusing on predetermined food platform place after 2 weeks throws something and feeds, after this with the bait throwing in machine ground grains feed of normally throwing something and feeding, increase with the fish body later on and strengthen the feed particle diameter.
6, seed rearing period management and disease control
Yellow cartfish suits living in the big water surface, to water quality requirement than carp, crucian strictness.Nutrition can not be superfluous in the water in yellow cartfish seed rearing pond, and the transparency of water should remain on more than the 40cm, often annotate new water, preferably well water; Breeding density can not be big as supporting other fish, too much causes water overfertilization and ammonia nitrogen too high with the feed that prevents to throw something and feed; Can only arrange in pairs or groups and culture silver carp, purify water to play, the purpose of increasing income, the bighead of can not arranging in pairs or groups, it can rob food and influence yellow catfish growing with yellow cartfish.Fish disease prevention and cure adopts that the fish bacterium is clean, chlorophos, copper sulphate and mixture of ferrous sulfate, potassium permanganate etc., and the routine administration amount is safe and effective.
7. light lures worm
Yellow cartfish enjoys a lot to absorb water living insect, if on the water surface of yellow cartfish cultivation pond black light lamp is set, carries out light and lures worm, not only can save feed, and can improve feeding effect.
8, sheet goes out the pool result yellow cartfish autumn
October 15 calendar year 2001 is to 7
#, 10
#, 13
#The pond has been carried out the examination of the dried pool and has been seen Table 4.
Table 4 yellow cartfish seed rearing result
| Pond number | Area (mu) | Stocking rate (ten thousand tails) | Go out pool amount (kg) | Average cabrage (g) | Cabrage luffing (g) | Survival rate (%) |
| ????7 | ????2.5 | ????2.5 | ????143 | ????24.45 | ??15-14 | ????23.39 |
| ????10 | ????3.4 | ????7.0 | ????475.5 | ????17.1 | ??9.5-30 | ????39.72 |
| ????13 | ????4.2 | ????4.0 | ????329 | ????17.8 | ??10.5-41.5 | ????46.21 |
Go out pool autumn sheet fingerling 947.5kg altogether, amount to 5.21 ten thousand tails.Explanation stocking rate deficiency that output is on the low side.
Claims (5)
1, large-scale artificial breeding technology for yellow cartfish, comprise parent fish rearing, determine the opportunity of hastening parturition, the fish nest be set, the pool is supported, descend to injection ocyodinic, hatching, fry temporarily in good time, tame throw something and feed, management and diseases prevention, it is characterized in that each link of breeding all requires meticulous assurance: reinforced cultivating is carried out in parent fish rearing when water temperature is higher than more than 12 ℃ in spring, day feeding volume accounts for fish body weight 3-5%, it is 150 kilograms/mu that ripe fish density is not more than, and cultivates autumn last year and stops when water temperature is lower than below 12 ℃ to feed; Determine the opportunity of hastening parturition: water temperature reaches 22-26 ℃, parent population weight requires that the raun cabrage is above at the 75-100 gram, the milter cabrage more than 100-150 restrains, and must reach the outward appearance ripeness standard; The fish nest is set: put into a rectangle wall with 6 bricks in pond bottom, at two ovum frames of wall inner bottom part lay, the 50-60% of parent population group of hastening parturition established nest quantity and is by mutual group adult fish nest, and the parent population group was by 1: 1 combo; The injection ocyodinic: drug regimen adopts human chorionic gonadtropin (HCG), luteotropin releasing hormone d-ala analog (LHRH-A
2), maleic acid DOM (DOM), dosage: HCG3000-4000 IU+LHRH-A
210 μ g+DOM5-10mg/kg fishes, amount of liquid medicine is no less than the 1ml/100g fish; The processing of ovum during hatching: embathed 10-15 minute through the 7-8mg/L malachite green solution before hatching, embathe once after 15-20 hour again, the dissolved oxygen of water is not less than 4mg/L between the incubation period; Fry is supported temporarily: fry density is at 2-3 ten thousand tails/m
3, the depth of water is no more than 1m, and dissolved oxygen is not less than 4mg/L; The wheel animalcule of throwing something and feeding after 48 hours, the quantity of throwing something and feeding is with 50-100/ml degree of being; The in good time down pool: fry is supported temporarily and begins after 5-6 days to disperse to move about, and reaches flat free state, can the following pool, put seedling density 3-5 ten thousand tail/mus; Domestication is thrown something and fed: the pool 20 days under the fry, grow to about 35mm, need tame and throw something and feed, domestication with bait based on fish meal, through 1mm sieve pulverize a small amount of inferior powder of back blending and become bulk hello, management and diseases prevention: breeding spand water can not overfertilization, and the transparency of water remains on more than the 40cm.
2, large-scale artificial breeding technology for yellow cartfish according to claim 1 is characterized in that the setting of fish nest: fish nest ovum frame is to be sewn on the quadrangle metal frame with the palm skin graft, two ovum frames of the bottom lay in the rectangle wall; Can also with the fish nest with metal or plastic material make garden tubular wall, the palm sheet that is sewn on the ring frame in tube inner bottom surface shop is made nest; With 150% of male fish length is the diameter of standard as circular fish nest, and big fish is used big nest, and small fish is used nidulus.
3, large-scale artificial breeding technology for yellow cartfish according to claim 1 is characterized in that injecting ocyodinic, the select parent population, has just established behind the fish nest formally injectable drug and has hastened parturition; Drug regimen is human chorionic gonadtropin (HCG)+luteotropin releasing hormone d-ala analog (LHRH-A
2)+maleic acid DOM (DOM), the medicament proportioning is, at HCG3000～4000IU+LHRH-A
2About 10mg+DOM5～10mg/kg fish; Injecting method adopts shot method personnel more after a little while, uses above-mentioned all dosage, and amount of liquid medicine is no less than the 1ml/100g fish; Under the enough situations of manpower, should adopt 2 injections, for the first time a LH injection RH-A
2Dosage, 10 hours later amounts of HCG injection and DOM again; Milter is not injected for the first time, 2/3 of three kinds of compound formulation doses of milter injection for the second time, i.e. 0.7ml/100g fish.
4, large-scale artificial breeding technology for yellow cartfish according to claim 1 is characterized in that incubation condition: 1) the hatching water should pass through sand filtration, keeps water peace and quiet; 2) can build special-purpose hatchery, long 1.5～2 meters of pond, wide 0.5～0.7 meter, dark 0.5 meter, the hatchery face is smooth, 0.3～0.4 meter of the depth of water of remaining valid, the flowing water hatching, delivery port adds 80～100 mesh sieve thin,tough silk, the vertical inflow and outflow of water; 3) net cage is hatched, and can sew on the thicker polyethylene plastic film of one deck again and reduce the fry friction on the case bottom surface.
5, large-scale artificial breeding technology for yellow cartfish according to claim 1, it is characterized in that fry puts in a suitable place to breed: 1) adopt the one-level method for breeding, breeding density is at 5～60,000 tail/mus, 2) adopt the secondary method for breeding, be fry grow to 35mm later on more again the branch pond raise, the density under the spray fry during pool is about 100,000 tail/mus; The long 35mm left and right sides seedling that arrives divides when supporting, and summer flower fish breeding density is at 2～30,000 tail/mus.
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| CN101502243B (en) * | 2009-03-05 | 2011-10-05 | 苏州大学 | Large-scale cultivation method for summer fingerlings of Pelteobagrus fulvidraco |
| CN101263793B (en) * | 2008-04-18 | 2012-08-01 | 沈阳华泰渔业有限公司 | Artificial propagation method for advanced fry of yellow catfish |
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2001
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