CN104304103A - Seedling breeding method for early breeding and cultivating large-size hemibarbus labeo - Google Patents
Seedling breeding method for early breeding and cultivating large-size hemibarbus labeo Download PDFInfo
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- CN104304103A CN104304103A CN201410475021.9A CN201410475021A CN104304103A CN 104304103 A CN104304103 A CN 104304103A CN 201410475021 A CN201410475021 A CN 201410475021A CN 104304103 A CN104304103 A CN 104304103A
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Life Sciences & Earth Sciences (AREA)
- Farming Of Fish And Shellfish (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
Abstract
The invention relates to the field of breeding of hemibarbus labeo, in particular to a seedling breeding method for early breeding and cultivating large-size hemibarbus labeo. The method comprises the steps of (1) cultivating parent fish, that is, cultivating the parent fish by using a soil pond, feeding the parent fish with granular baits for 2-4 times every day, and performing micro-running water cultivation, wherein the weight of each parent fish is 1-3 kg, and the bait amount is 2-5 percent of the body weight of the parent fish; (2) maturing the parent fish, that is, raising the temperature and increasing the illumination by virtue of greenhouse daylight according to the characteristic that the temperature is quickly raised in early spring, accelerating the gonad development of the hemibarbus labeo, and helping the gonad of the hemibarbus labeo to transit from the period IV to the period V by virtue of running water stimulation; (3) performing artificial spawning induction; (4) performing insemination and incubation; (5) performing seedling cultivation, that is, cultivating water blooms and black sons of the hemibarbus labeo in the soil pond and a cement pond, and cultivating fries and adult fish of the hemibarbus labeo. The parent fish is cultivated by using a greenhouse temperature control technology, a light control technology and a running water maturing technology, and de-bonding incubation of fertilized ova is realized, so that the survival rate of seedlings is greatly improved, and the cultivation period is effectively shortened.
Description
Technical field
The present invention relates to lip
(hu á) breeds field, is specially one and breeds ahead of time, cultivates large gauge lip
offspring breeding method.
Background technology
Lip
hemibarbus labeo (Pallas), popular name skin-carp meat.Be subordinate to Cypriniformes, Cyprinidae, Minnow subfamily, Latin generic name: Hembarbus Bleeker.The whole nation has and distributes widely, and Liaoning Area is mainly distributed in Yalujing estuary and tributary (Ai river, the large Yanghe River), Hun River, Taizihe River, green stream river etc.Lip
fine and tender taste, nutritious, being rich in amino acid, vitamin and mineral matter, is deeply by the high-grade aquatic products that consumer likes.
At present, lip
work raising technology still rests on nature at home and adopts to catch Gunther parent fish spawning or adopt and catch wild seed, causes lip
the problems such as seed growth rate is slow, and the culture-cycle is long.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide one to breed ahead of time, cultivate large gauge lip
offspring breeding method, takes plastic greenhouse temperature control, control light, flowing water ripening technique to cultivate parent population, the hatching of fertilized egg unsticking, makes the egg reproduction phase shift to an earlier date 15 days, cultivate large size seedling seed then, increased substantially weed survival rate, effectively shortened the culture-cycle.
Technical scheme of the present invention is:
One is bred ahead of time, cultivate large gauge lip
offspring breeding method, detailed process is as follows:
(1) parent fish rearing: utilize native pond to carry out the cultivation of parent population, parent population specification 1 ~ 3kg/ tail, to throw something and feed granular bait for fish by 2 ~ 5% of parent population body weight, day bait throwing in 2 ~ 4 times, micro-running water technology;
(2) parent population accelerating: utilize the feature rapidly that heats up early spring, adopts booth daylight to heat, increase illumination, accelerates lip
gonad development, in conjunction with stimulation by running water help lip
sexual gland is from IV phase to the transition of V phase;
(3) artificial induced spawning: observe lip
motion, occur that food ration goes down, chase phenomenon, ovum grain is full to check part raun with spy egg apparatus, and extruding milter belly adularescent seminal fluid flows out hastens parturition;
(4) artificial insemination and hatching: take test-tube mode, do detackifier with yellow mud, concentrates hatching with net cage or incubator;
(5) seed rearing: select native pond and cement pond clearing two kinds of patterns to cultivate lip
spray and crow young, native pond rearing lip
summer flower and adult fish.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, utilizes booth daylight to heat, and daytime heats up 0.5 ~ 1 DEG C naturally, controls water temperature and keep good water quality in cultivating process well, and period with micro-stimulation by running water parent population, effectively improves the incubation rate of parent population survival rate and fertilized egg; Water temperature 14 ± 1 DEG C, when female, male feature is obvious, is separated, and point pond is cultivated, and avoids female milter to lay eggs voluntarily, causes damage, want Artificial Control illumination to regulate water temperature in cultivating process, and raun cultivates pond water temperature a little more than male 0.5 DEG C.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, parent population enters the pond nurturing period, and bait of throwing something and feeding is cultivated 18 ~ 22 days, water temperature 16 ± 1 DEG C, and observe the ingesting of parent population, chase phenomenon, whether ovum grain is full to check female fish egg, starts to hasten parturition and artificial insemination.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, first parent population water for larval nursing precipitates through I and II sedimentation basin, precipitation suspended material, reach the object of primary purifying water quality, seedling rearing room is entered with water after precipitation, water inlet 100 mesh sieve tulles filter microzooplankton and harmful organisms, use the harmful bacteria in the povidone iodine of 0.8 ~ 1.2mg/L or the bromine preparation process water of 0.8 ~ 1.2mg/L simultaneously.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, artificial induced spawning, artificial insemination and artificial incubation are larvae rearing process, specific as follows:
(1) artificial induced spawning
Water temperature 16 ± 1 DEG C, raun ingests and weakens, and occurs mutually chasing phenomenon, abdominal distention and ovum grain is full, and milter extrudes belly gently, has seminal fluid to flow out, starts to inject oxytocic drug to parent population; Take muscle of back or intrathecal: luteotropin releasing hormone d-ala analog LHRH-A2:5 ~ 10 μ g/kg and maleic acid DOM DOM:4 ~ 8mg/kg, Effect time is 18 ~ 30h;
(2) artificial insemination
Extruding raun belly gently has ovum grain to flow out, and gets final product artificial insemination; First fish body dry towel is dried, particularly anal fin and afterbody, in order to avoid water droplet enters in basin to cause sperm inactivation, ovum loses fertility; Dried by enamel basin, basin inwall coats thin layer vaseline again, and ovum squeezes in enamel basin, clamp-ons seminal fluid, stirs gently make it fertilization with feather; After artificial insemination, use the process of conventional method unsticking immediately, and use clear water rinsing, to remove the upper residual sperm of fertilized egg, after fertilized egg imbibition, put into incubator or net cage is hatched;
(3) artificial incubation
With yellow mud to the process of fertilized egg unsticking, hatching density is the fertilized egg after 10000 unstickings placed by each net cage, and cage size is 1 × 0.7 × 1m; Or fertilized egg is miniflow water inflation hatching 10 ~ 150,000/m in incubator
3; Water temperature 15 ~ 17 DEG C, through 100 ~ 120h hatching, fertilized egg successively rupture of membranes hatches prelarva, and water temperature 17 ~ 20 DEG C, the rupture of membranes time is at 70 ~ 90h.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, the process of seed rearing is as follows:
(1) prelarva Tu Chi cultivates
Squab prelarva total length 6 ~ 7mm, seedling rearing room water temperature 18 ~ 20 DEG C, yolk disappearance initial feeding after 3 days, breeding density is 150 ~ 2,250,000 fishes/ha, take wheel animalcule as open-mouthed bait, prelarva culture pond and wheel animalcule culture pond are separated, soya-bean milk culture of rotifera of splashing every day, the fertile degree according to pond water is splashed according to the dry soya bean of 2 ~ 5kg/ mu;
(2) prelarva cement pit is cultivated
It is 5000 tails/m that spray cultivates density
3, spray seed uses wheel animalcule, cladocera, water silk earthworm or halogen worm to throw something and feed, and different bait adds after Vc strengthens 20 ~ 30h throws something and feeds, and prelarva cement pit type of rearing, cultivates the long 3cm of body in cement pit always;
(3) black young pond rearing
Breeding density 75 ~ 1,050,000 fishes/ha, to throw something and feed wheel animalcule and bait by body weight 8 ~ 10%, through the raising of 20 ~ 25 days, seed body reached 4 ~ 5cm, started a counting point pond and put into culturing pool and cultivate.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, Vc strengthens as per kilogram bait adds Vc 500 ~ 1000 milligrams.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, carry out large size seedling seed cultivation after seed rearing, detailed process is as follows:
(1) pond treatment
Pond area 666 ~ 1200m
2, the depth of water 1 ~ 1.2m; Put fingerling basal dressing before 5 ~ 7 days in a suitable place to breed, every 666m
2execute the fertilizer 150 ~ 200kg become thoroughly decomposed;
(2) feeding and management
Putting seed size in a suitable place to breed is 4 ~ 5cm, and density is 6000 ~ 8000 tails/666m
2, water silk earthworm of throwing something and feeding when just having entered pond mixes granular bait for fish, and granular bait for fish of throwing something and feeding completely after adapting to, is thrown something and fed by 7 ~ 8% of fish body weight at every day 2 ~ 3 times, and autumn in end of the year sheet seed body weight reaches 80 ~ 90g.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, the part by weight of water silk earthworm and bait is 1:4 ~ 6.
Described to breed ahead of time, cultivate large gauge lip
offspring breeding method, the flow of miniflow water is 40 ~ 60L/min.
The present invention is applied to lip
artificial breeding technology has the following advantages and beneficial effect:
1, the present invention can make lip
the egg reproduction phase shift to an earlier date 15 days, cultivate the large size seedling seed that body weight is greater than 60 grams then, can weed survival rate be increased substantially, effective Shortening culturing period.
2, April early stage artificial breeding, improved by sun light green house and cultivate water temperature, illumination, reinforcement nutrition stimulation by running water, promote parent population gonad development, the artificial breeding time can shift to an earlier date more than 15 days.Adopt stimulation by running water aborning, particularly compared with the stimulation by running water of large discharge to lip
gonad development there is obvious facilitation, now become induction parent population sexually matured steps necessary.
3, ahead of time seedling-cultivating method is adopted, lip
seed body length on average can increase 1cm, and body weight increases 5g, and the cultivation phase extends more than 20 days.Raising technology ahead of time, can provide large size seedling seed for producing, extending the cultivation phase, forming marketable fish ahead of time.
Embodiment
In a specific embodiment, the present invention breeds ahead of time, cultivates large gauge lip
the process of offspring breeding method is as follows:
1. parent fish rearing: utilize native pond to carry out the cultivation of parent population, parent population specification 1 ~ 3kg/ tail, to throw something and feed granular bait for fish by 2 ~ 5% of parent population body weight, day bait throwing in 2 ~ 4 times, micro-running water technology.
2. parent population accelerating: utilize the feature rapidly that heats up early spring, adopts booth daylight to heat, increases illumination (the fish laid eggs in spring and summer sky, the sunshine time extends than nature, just can do sth. in advance sexual maturity and lay eggs), accelerate lip
gonad development, in conjunction with stimulation by running water help lip
sexual gland is from IV phase to the transition of V phase.The north utilizes booth daylight to heat, and can subsist than natural water area accumulation accumulated temperature many 30, Early-breeding breeds 15 days.
3. artificial induced spawning: observe lip
motion, occur that food ration goes down, chase phenomenon on a small quantity, ovum grain is full to check part raun with spy egg apparatus, and extruding milter belly has a small amount of white seminal fluid to flow out and can hasten parturition.
4. artificial insemination and hatching: take test-tube mode, do detackifier with yellow mud, fertilized egg can use net cage, fiberglass incubator or cement pit to concentrate hatching.
5. seed rearing: select native pond and cement pond clearing two kinds of patterns to cultivate lip
spray and crow young.Soil pond rearing lip
summer flower and adult fish, attempt different breeding pattern, control and prevention of disease and suitable bait.
In the present invention, relational language is explained as follows:
1, accumulated temperature:
Parent population is in the period of growing, not only require certain temperature (height of temperature), but also need certain heat summation, this heat summation normally with this period water temperature day by day accumulated value represent, this accumulated value is just called accumulated temperature, and unit subsists.
2, spray, crow son, summer flower and autumn sheet:
Fresh-water fish-culture term.Fry is also spray, fish fry etc., generally refers to the prelarva that just hatching is later.When fry grows to 1.5 ~ 1.8 cm, young also known as work crow.When fry grows to 4 ~ 5 cm, because going out the pool on the occasion of summer, therefore claim summer flower.To autumn, through cultivating, when summer flower is grown up to 8 ~ 10 cm, just to cry " autumn is colored ", also having and being called " autumn sheet ".
3, miniflow water: flow 40 ~ 60L/min.
4, Effect time: (counting) to the required time that starts to oestrus after parent population has injected ocyodinic during to have injected for the last time is Effect time (18 ~ 30h).
Below by embodiment, the present invention is described in more detail.
Embodiment 1
In the present embodiment, breed ahead of time, cultivate large gauge lip
offspring breeding method, concrete steps are as follows:
1. parent fish rearing and accelerating
The lip of fishing for nature and propagate artificially
, preferred body weight 1 ~ 3kg body as parent population, carries out reinforced cultivating after screening without disability.Utilize 8m × 8m=64m
2cement pit carries out the cultivation of parent population, depth of water 1.4m, and parent population 10 ~ 15 tail is put in every pond in a suitable place to breed.To clear up every day at the bottom of pond once, to throw something and feed the rotten or artifical compound feed of the fish of iced trash fish processing by 3 ~ 5% of parent population body weight, day bait throwing in three times.
Started April 5 to utilize booth daylight to heat, daytime can heat up 0.5 ~ 1 DEG C naturally, control well in cultivating process water temperature and keep good water quality, period stimulates parent population with miniflow water (flow 50L/min), effectively can improve the incubation rate of parent population survival rate and fertilized egg.To prevent water temperature from changing after parent population enters seedling rearing room or booth too fast, cause parent population sexual gland to be degenerated or death.Water temperature 14 ± 1 DEG C, when female, male feature is obvious, is separated, and point pond is cultivated, and avoids female milter to lay eggs voluntarily, causes damage, want Artificial Control illumination to regulate water temperature in cultivating process, and raun cultivates pond water temperature a little more than male 0.5 DEG C.
Parent population enters the pond nurturing period, conventional high-quality bait of throwing something and feeding, and cultivates 20 days, water temperature 16 ± 1 DEG C, and observe the ingesting of parent population, chase phenomenon, whether ovum grain is full to check female fish egg, starts to hasten parturition and artificial insemination.
2. water for larval nursing process
First water for larval nursing precipitates through I and II sedimentation basin, precipitation suspended material, reach the object of primary purifying water quality, seedling rearing room is entered with water after precipitation, water inlet 100 mesh sieve tulles filter microzooplankton and harmful organisms, use the harmful bacteria in the povidone iodine (PV iodine) of 1mg/L or bromine preparation (as: C5H6Br2N2O2 or BCDMH etc.) the process water of 1mg/L simultaneously.
3. larvae rearing
(1) artificial induced spawning
Artificial induced spawning: spawning rate is high, ovum quality is excellent, can meet large-scale production needs.Thus, in test after this, adopt which to obtain fertilized egg.
Water temperature 16 ± 1 DEG C, raun ingests and weakens, and occurs mutually chasing phenomenon, abdominal distention and ovum grain is full, and milter extrudes belly gently, has seminal fluid to flow out, can start to inject oxytocic drug to parent population.Take muscle of back or intrathecal method, the oxytocic drug of injection is: luteotropin releasing hormone d-ala analog (LHRH-A2) 5 ~ 10 μ g/kg and maleic acid DOM (DOM) 4 ~ 8mg/kg, Effect time is 18 ~ 30h.
In order to prevent ovum overdone, move on to net cage waiting to produce parent population after hastening parturition, and check in time, select the best opportunity to carry out artificial insemination, the parent population of body weight 1 ~ 3kg, eggs on average amount is 2 ~ 60,000.
(2) artificial insemination
Extruding raun belly gently has ovum grain to flow out, and gets final product artificial insemination.First fish body dry towel is dried, particularly anal fin and afterbody, in order to avoid water droplet enters in basin to cause sperm inactivation, ovum loses fertility.Dried by enamel basin, basin inwall coats thin layer vaseline again, and ovum squeezes in enamel basin, clamp-ons several seminal fluid, stirs gently make it fertilization with feather.Conveniently operate, in advance the sucking-off of seminal fluid syringe is placed on refrigerator and cooled and hides for subsequent use, the seminal fluid deposited can preserve 5 ~ 7h.After artificial insemination, use the process of conventional method unsticking immediately, and with clear water repeatedly rinsing, to remove the upper residual sperm of fertilized egg, after fertilized egg imbibition, (ovum footpath is about 2.6mm) puts into incubator or net cage is hatched.
(3) artificial incubation
With yellow mud to the process of fertilized egg unsticking, in incubator, inflate hatching m.Cage size is 10000, fertilized egg after 1 × 0.7 × 1m can hatch a unsticking; In incubator, miniflow water (flow 50L/min) inflates hatching density is 10 ~ 150,000/m
3.Water temperature 15 ~ 17 DEG C, through 110h hatching, fertilized egg successively rupture of membranes hatches prelarva, and water temperature 17 ~ 20 DEG C, the rupture of membranes time is at 80h.To carry out between the incubation period and disinfect, avoid growing of water mo(u)ld.
4. seed rearing
(1) prelarva Tu Chi cultivates
Squab prelarva total length 6.5mm, seedling rearing room water temperature 18 ~ 20 DEG C, yolk disappearance initial feeding (natural temperature needs 5 days) after 3 days, breeding density is 150 ~ 2,250,000 fishes/ha (ha).Do a good job of it two links in cultivation, one will thoroughly clean up the pond elimination harmful organisms, keeps water quality pure and fresh; The two open-mouthed bait supplies that will ensure high-quality, wheel animalcule is best open-mouthed bait.High-quality, agreeable to the taste bait can improve unit of water body output of seedling, there is special cultivation pond, prelarva culture pond and wheel animalcule culture pond are separated, soya-bean milk culture of rotifera of splashing every day, fertile degree according to pond water is splashed according to 2 ~ 5kg/ mu (dry soya bean), can effectively improve wheel animalcule quantity.
(2) prelarva cement pit is cultivated
It is 5000 tails/m that spray cultivates density
3, spray seed is thrown something and fed after using the different bait such as wheel animalcule, cladocera, water silk earthworm, halogen worm to add Vc strengthening (per kilogram bait adds 500 ~ 1000 milligrams of Vc) 24h, increases attractant and the nutrition of bait, effectively improves weed survival rate.Prelarva cement pit type of rearing, can cultivate always sell to long more than the 3cm of body in cement pit.
(3) black young pond rearing
Clean up the pond rich water, storage pond, holding pond area 1 ~ 3 mu, first carries out smooth to pond, throws in bio-fertilizer aqua, and carries out strict filtration, sterilization to rich water, prevent damage by disease and insect from entering pond, improve black young survival rate.Breeding density 75 ~ 1,050,000 fishes/ha (ha), to throw something and feed wheel animalcule be domesticated for normal miniature high-quality bait gradually by body weight 8 ~ 10%, through the raising of 20 ~ 25 days, seed body reached 4 ~ 5cm, started a counting point pond and put into culturing pool and cultivate.
5. prevention of damage by disease
Along with the raising of water temperature, various bacterium, Trichodina, saprolegniasis amount reproduction, immerse in ovum and fish body, ovum permeability is deteriorated lethal.Apply 1mg/L New-type wide-spectrum germ killing drugs (C5H6Br2N2O2) in every 5 sky and water, pre-disease prevention occurs.
6. large size seedling seed is cultivated
(1) pond treatment
Thorough disinfection pond, with 666 ~ 1200m
2area is advisable, the depth of water 1 ~ 1.2m.Put fingerling basal dressing before 5 ~ 7 days in a suitable place to breed, every 666m
2execute the fertilizer 150 ~ 200kg become thoroughly decomposed.
(2) feeding and management
Putting seed size in a suitable place to breed is 4 ~ 5cm, and density is 6000 ~ 8000 tails/666m
2, the water silk earthworm of having thrown something and fed a small amount of when just having entered pond mixes granular bait for fish (part by weight of water silk earthworm and bait is 1:5), and granular bait for fish of throwing something and feeding completely after adapting to, every day 2 ~ 3 times, throws something and feeds by 7 ~ 8% of fish body weight, and autumn in end of the year sheet seed body weight reaches 85g.
(3) overwinter management
Lip
stronger than carp to the adaptability of low temperature, through in a few years observing, during low water temperature in winter, lip
seedling also has motion, and the general water surface can not freeze, and does not therefore need heavy net cage, can reduce production link, reduces labour intensity.
To regulating water quality be noted before Wintering, cultivate phytoplankton, keep good water quality and sufficient oxygen, create good environment of surviving the winter.
Claims (10)
1. breed ahead of time, cultivate large gauge lip for one kind
offspring breeding method, is characterized in that, detailed process is as follows:
(1) parent fish rearing: utilize native pond to carry out the cultivation of parent population, parent population specification 1 ~ 3kg/ tail, to throw something and feed granular bait for fish by 2 ~ 5% of parent population body weight, day bait throwing in 2 ~ 4 times, micro-running water technology;
(2) parent population accelerating: utilize the feature rapidly that heats up early spring, adopts booth daylight to heat, increase illumination, accelerates lip
gonad development, in conjunction with stimulation by running water help lip
sexual gland is from IV phase to the transition of V phase;
(3) artificial induced spawning: observe lip
motion, occur that food ration goes down, chase phenomenon, ovum grain is full to check part raun with spy egg apparatus, and extruding milter belly adularescent seminal fluid flows out hastens parturition;
(4) artificial insemination and hatching: take test-tube mode, do detackifier with yellow mud, concentrates hatching with net cage or incubator;
(5) seed rearing: select native pond and cement pond clearing two kinds of patterns to cultivate lip
spray and crow young, native pond rearing lip
summer flower and adult fish.
2. according to according to claim 1ly breeding ahead of time, cultivating large gauge lip
offspring breeding method, is characterized in that, utilizes booth daylight to heat, and daytime heats up 0.5 ~ 1 DEG C naturally, controls water temperature and keep good water quality in cultivating process well, and period with micro-stimulation by running water parent population, effectively improves the incubation rate of parent population survival rate and fertilized egg; Water temperature 14 ± 1 DEG C, when female, male feature is obvious, is separated, and point pond is cultivated, and avoids female milter to lay eggs voluntarily, causes damage, want Artificial Control illumination to regulate water temperature in cultivating process, and raun cultivates pond water temperature a little more than male 0.5 DEG C.
3. according to according to claim 1ly breeding ahead of time, cultivating large gauge lip
offspring breeding method, is characterized in that, parent population enters the pond nurturing period, and bait of throwing something and feeding is cultivated 18 ~ 22 days, water temperature 16 ± 1 DEG C, and observe the ingesting of parent population, chase phenomenon, whether ovum grain is full to check female fish egg, starts to hasten parturition and artificial insemination.
4. according to according to claim 1ly breeding ahead of time, cultivating large gauge lip
offspring breeding method, it is characterized in that, first parent population water for larval nursing precipitates through I and II sedimentation basin, precipitation suspended material, reach the object of primary purifying water quality, enter seedling rearing room with water after precipitation, water inlet 100 mesh sieve tulles filter microzooplankton and harmful organisms, use the harmful bacteria in the povidone iodine of 0.8 ~ 1.2mg/L or the bromine preparation process water of 0.8 ~ 1.2mg/L simultaneously.
5. according to according to claim 1ly breeding ahead of time, cultivating large gauge lip
offspring breeding method, is characterized in that, artificial induced spawning, artificial insemination and artificial incubation are larvae rearing process, specific as follows:
(1) artificial induced spawning
Water temperature 16 ± 1 DEG C, raun ingests and weakens, and occurs mutually chasing phenomenon, abdominal distention and ovum grain is full, and milter extrudes belly gently, has seminal fluid to flow out, starts to inject oxytocic drug to parent population; Take muscle of back or intrathecal: luteotropin releasing hormone d-ala analog LHRH-A2:5 ~ 10 μ g/kg and maleic acid DOM DOM:4 ~ 8mg/kg, Effect time is 18 ~ 30h;
(2) artificial insemination
Extruding raun belly gently has ovum grain to flow out, and gets final product artificial insemination; First fish body dry towel is dried, particularly anal fin and afterbody, in order to avoid water droplet enters in basin to cause sperm inactivation, ovum loses fertility; Dried by enamel basin, basin inwall coats thin layer vaseline again, and ovum squeezes in enamel basin, clamp-ons seminal fluid, stirs gently make it fertilization with feather; After artificial insemination, use the process of conventional method unsticking immediately, and use clear water rinsing, to remove the upper residual sperm of fertilized egg, after fertilized egg imbibition, put into incubator or net cage is hatched;
(3) artificial incubation
With yellow mud to the process of fertilized egg unsticking, hatching density is the fertilized egg after 10000 unstickings placed by each net cage, and cage size is 1 × 0.7 × 1m; Or fertilized egg is miniflow water inflation hatching 10 ~ 150,000/m in incubator
3; Water temperature 15 ~ 17 DEG C, through 100 ~ 120h hatching, fertilized egg successively rupture of membranes hatches prelarva, and water temperature 17 ~ 20 DEG C, the rupture of membranes time is at 70 ~ 90h.
6. according to according to claim 1ly breeding ahead of time, cultivating large gauge lip
offspring breeding method, is characterized in that, the process of seed rearing is as follows:
(1) prelarva Tu Chi cultivates
Squab prelarva total length 6 ~ 7mm, seedling rearing room water temperature 18 ~ 20 DEG C, yolk disappearance initial feeding after 3 days, breeding density is 150 ~ 2,250,000 fishes/ha, take wheel animalcule as open-mouthed bait, prelarva culture pond and wheel animalcule culture pond are separated, soya-bean milk culture of rotifera of splashing every day, the fertile degree according to pond water is splashed according to the dry soya bean of 2 ~ 5kg/ mu;
(2) prelarva cement pit is cultivated
It is 5000 tails/m that spray cultivates density
3, spray seed uses wheel animalcule, cladocera, water silk earthworm or halogen worm to throw something and feed, and different bait adds after Vc strengthens 20 ~ 30h throws something and feeds, and prelarva cement pit type of rearing, cultivates the long 3cm of body in cement pit always;
(3) black young pond rearing
Breeding density 75 ~ 1,050,000 fishes/ha, to throw something and feed wheel animalcule and bait by body weight 8 ~ 10%, through the raising of 20 ~ 25 days, seed body reached 4 ~ 5cm, started a counting point pond and put into culturing pool and cultivate.
7. according to according to claim 6ly breeding ahead of time, cultivating large gauge lip
offspring breeding method, is characterized in that, Vc strengthens as per kilogram bait adds Vc 500 ~ 1000 milligrams.
8. according to according to claim 1ly breeding ahead of time, cultivating large gauge lip
offspring breeding method, is characterized in that, carry out large size seedling seed cultivation after seed rearing, detailed process is as follows:
(1) pond treatment
Pond area 666 ~ 1200m
2, the depth of water 1 ~ 1.2m; Put fingerling basal dressing before 5 ~ 7 days in a suitable place to breed, every 666m
2execute the fertilizer 150 ~ 200kg become thoroughly decomposed;
(2) feeding and management
Putting seed size in a suitable place to breed is 4 ~ 5cm, and density is 6000 ~ 8000 tails/666m
2, water silk earthworm of throwing something and feeding when just having entered pond mixes granular bait for fish, and granular bait for fish of throwing something and feeding completely after adapting to, is thrown something and fed by 7 ~ 8% of fish body weight at every day 2 ~ 3 times, and autumn in end of the year sheet seed body weight reaches 80 ~ 90g.
9. according to according to claim 8ly breeding ahead of time, cultivating large gauge lip
offspring breeding method, is characterized in that, the part by weight of water silk earthworm and bait is 1:4 ~ 6.
10. according to breeding ahead of time described in claim 1,2 or 5, cultivate large gauge lip
offspring breeding method, is characterized in that, the flow of miniflow water is 40 ~ 60L/min.
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