CN104798709A - Breeding method of babylonia areolata cross-breeding seeds - Google Patents
Breeding method of babylonia areolata cross-breeding seeds Download PDFInfo
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Abstract
The invention provides a breeding method of babylonia areolata cross-breeding seeds. Male Thailand babylonia areolata and female Hainan babylonia areolata as well as male Hainan babylonia areolata and female Thailand babylonia areolata are respectively adopted for cross breeding, and through processes of parent babylonia areolata sex determination, parent babylonia areolata of different geographical population cross breeding pairing, parent babylonia areolata nutrition enhacnign culture, oocyst collection and hatching, larva culture, young babylonia areolata culture and the like, the cross-breeding seeds with high growth speed and strong disease resistance are cultured. When the method is used for breeding cross-breeding seeds, the culture diseases are reduced, and the occurrence of diseases such as turgescence diseases and shucking diseases can be avoided. The cross-breeding seed stocking is adopted, the yield is increased by 8.2 to 20.3 percent through being compared with that of the traditional breeding seeds, the production value of per square meter of culture pools is increased by 80 to 189.6 Yuan, and the culture economic benefits are improved; antibiotics are not used in the culture process, the product quality is improved, the cultured product conforms to the pollution-free food standard, positive effects are realized on marine ecological environment protection, and the stable healthy and continuous development of the babylonia areolata culture industry is promoted.
Description
Technical field
The invention belongs to aquaculture field, relate to a kind of mating system of Babylonia areolata (Lamarck) hybrid seedlings particularly.
Background technology
Babylonia areolata (Lamarck) is called for short Babylonia, is commonly called as colored spiral shell, is subordinate to Gastropoda, narrow tongue order, Buccinidae, Babylonia genus.Mainly be distributed in China provinces such as being in the torrid zone, semi-tropical Fujian, Guangdong, Guangxi and Hainan coastal, be that individuality is comparatively large in several Babylonias of distribution in China, growth rate is a kind of high-quality shellfish faster.Its delicious meat, nutritious, crisp tasty and refreshing, be seafood table delicacies delicacy emerging both at home and abroad in recent years.
The Babylonia areolata (Lamarck) kind of current Hainan cultivation mainly contains two; one is Thailand's Babylonia areolata (Lamarck); another kind is Hainan Babylonia areolata (Lamarck); Thailand's Babylonia areolata (Lamarck) growth rate is faster than Hainan Babylonia areolata (Lamarck), but " swollen kiss is sick " and " shelling is sick " all easily occur two kind breeding process; thus need antibiotics be used; reduce the quality of product, be unfavorable for the protection of the marine eco-environment, cultivation survival rate is not ideal enough.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of mating system of Babylonia areolata (Lamarck) hybrid seedlings, seed fast growth, premunition is strong, and cultivation survival rate is high.
The present invention is achieved in that
A mating system for Babylonia areolata (Lamarck) hybrid seedlings, comprises the following steps:
(1) selection of close spiral shell and male and female differentiate
Select Hainan Babylonia areolata (Lamarck) of shell height 5.5-8.5cm, body weight 40-80g, select Thailand's Babylonia areolata (Lamarck) of shell height 5.5-7.0cm, body weight 35-55g, both all select natural spiral shell; After male and female differentiate, male and female parent spiral shell is separately put in a suitable place to breed in different cement pit;
(2) different geographic populations parent spiral shell hybridization
The male and female parent spiral shell of different geographic populations, all carries out fortification with oyster, squid, crab class for bait; After close spiral shell all enters spawning season, allow the female close spiral shell of Hainan Babylonia areolata (Lamarck) and the male close spiral shell of Thailand's Babylonia areolata (Lamarck) according to the proportioning natural mating of 1: 1.1-1.3 in same pond, and/or allow the female close spiral shell of Thailand's Babylonia areolata (Lamarck) and the male close spiral shell of Hainan Babylonia areolata (Lamarck) in another pond according to the proportioning natural mating of 1: 1.1-1.3;
(3) close spiral shell fortification of matching is cultivated
With crab class, oyster, squid, clam worm for bait, day bait throwing in 1 time, daily ration, feeding quantity is just to have ingested or the residual bait of minute quantity is advisable; Water temperature regulate and control is at 26-30 DEG C; Continuous flowing water and inflation, day streamflow be cultivate water body 3-5 doubly;
(4) egg capsule collection and hatching
1-2 days before the young hatches, collect egg capsule, put into nursery pond after sterilization and hatch, during hatching, continuous micro-inflation, keeps good water quality;
(5) larvae cultivation
Just hatching veliger breeding density is 0.10-0.20/mL, after egg capsule is hatched, bait throwing in every day 2 times, with unicellular algas such as Chaetoceros muelleri, chlorella and Isochrysis galbana for bait, supplement spirulina powder of throwing something and feeding, each feeding volume of single-cell algae is 3-6 × 10 simultaneously
4individual/mL, each feeding volume of spirulina powder is 0.06-0.09g/m
3;
4-10 days after larvae hatch, except throw something and feed single-cell algae and spirulina powder, increase the prawn slice and BP of throwing shrimp seed rearing use, bait throwing in every day 2 times, each feeding volume of single-cell algae is 3-6 × 10
4individual/mL, each feeding volume of spirulina powder is 0.1-2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.03-0.3g/m
3, each feeding volume of BP is 0.03-0.07g/m
3; Also throw in B B-complex every day 2 times, each feeding volume is 0.03-0.1g/m
3;
Within after larvae hatch the 11st day, to abnormal, stop throwing unicellular alga, bait throwing in every day 2 times, each daily ration, feeding quantity of spirulina powder is 2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.3g/m
3, each daily ration, feeding quantity of Bp is 0.07g/m
3; Throw in B B-complex every day 2 times, each daily ration, feeding quantity is 0.1g/m
3;
When larva starts metamorphosis for young spiral shell, each 2 times of bait throwing in every day spirulina powder, prawn slice and BP, each daily ration, feeding quantity of spirulina powder is 2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.3g/m
3, each feeding volume of BP is 0.07g/m
3, start freezing artemia nauplii of throwing something and feeding, each daily ration, feeding quantity of artemia nauplii is every square of water surface 0.3-0.5g, throws 3 day;
Larvae hatch starts to change water for the 8th day or the 9th day, and every 1-2 days changes water once, and each quantity of exchanged water is the 20-30% of seedling water; The equal continuity inflation of larvae cultivation overall process, makes dissolved oxygen keep more than 5mg/L, after the most of metamorphosis of larva is young spiral shell, stops inflation 20-40min, make at the bottom of bait sinking pond, be convenient to firm abnormal young spiral shell and ingest when bait throwing in;
(6) young spiral shell is cultivated
When the young spiral shell of living is dwelt in larva whole metamorphosis the end of for, collect young spiral shell;
Use and carry out the cultivation in early stage of young spiral shell without the husky cement pit of paving, according to the area at the bottom of pond, breeding density is 1.0-2.0 ten thousand/m
2cultivate 9-12 days, with artemia nauplii bait, bait throwing in every day 2 times, within 1-5 days, artemia nauplii daily ration, feeding quantity throws 3-5g with every ten thousand young spiral shell days, and after the 6th day, artemia nauplii daily ration, feeding quantity throws 5-10g with every ten thousand young spiral shell days, except stopping flowing water with except inflation 50-70min during bait throwing in, keep flowing water and inflation At All Other Times, day streamflow be seedling water 1.5-3 doubly;
The young spiral shell that premenstruum (premenstrua) cultivates is moved on in the cement pit laying fine sand and carries out later stage cultivation, depth of water 0.6-0.8m, according to the area at the bottom of pond, young spiral shell breeding density is 9000-11000 grain/m
2, with oyster, squid, shrimp, crab, squid and/or chilled fish for bait, day bait throwing in 3-4 time, feeding volume is advisable to have ingested in 100-140min after bait throwing in; Except stopping flowing water with except inflation 50-70min during bait throwing in, keep flowing water and inflation At All Other Times, day streamflow be seedling water 1-2 doubly; Later stage mark thick cultivation cultivates as spiral shell seedling to young spiral shell shell up to namely can be used for 0.6-1.0cm for 40-50 days.
Further, glass aquarium is adopted when male and female differentiate, water inlet 8-12cm, after close spiral shell abdominal foot launches to climb tank wall, start unaided eye discrimination: the close spiral shell of climbing tank wall, observe and whether have mating device and abdominal foot mouth, as having the mating device of grain of rice shape on the right side of close spiral shell abdominal foot and bottom abdominal foot, (rotund abdominal foot mouth large less than mung bean, can be judged to be male close spiral shell; As there is no the mating device of grain of rice shape on the right side of close spiral shell abdominal foot, and bottom abdominal foot, there is the large rotund abdominal foot mouth of mung bean, being namely judged to be female close spiral shell.
Further, described glass aquarium is placed on the base of high 30-40cm.
Such as, described base can adopt four foot rests (brandreth or yoke), box like object etc.
Further, in step (4), sterilization employing concentration is the formalin sterilization 0.5-1min of 100-200mg/L.
Further, in step (5), during larvae hatch, the depth of water is 0.8m, within the 3rd day, starts to add 4-6cm filtering sea every day, is increased to 1m dark to water level during 7-8 days.
Further, in step (6), the later stage cultivates every ten thousand young spiral shell day bait throwing in 20-40g when starting, and increase gradually according to the situation of ingesting, reach 180-200g to later stage every ten thousand young spiral shell day bait throwing in, feeding volume is advisable to have ingested in 100-140min after bait throwing in,
Further, in step (6), when the later stage cultivates, the pool wall that the water surface has a common boundary is arranged and stops band, prevent young spiral shell from climbing out of the dry dew of the water surface and occurring dead.
Further, the described band that stops is for being pasted onto the fibre fluff sideband on the pool wall of water surface boundary.
Breeding hybrid seed of the present invention, reduces the farming disease harms, avoids the diseases such as " swollen kiss is sick " and " shelling is sick " to occur; Breeding process does not use antibiotic, improves the quality of products, and the product of cultivation meets pollution-free food standard; Put in a suitable place to breed hybrid seedlings relatively tradition breed seed volume increase 8.2-20.3%, every square metre of culturing pool increases output value 80-189.6 unit, improves fanning economics; Breeding process does not use antibiotic, has positive role to the protection marine eco-environment, is conducive to promoting that Babylonia areolata (Lamarck) aquaculture is stable, healthy, sustainable development.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described, to understand the present invention better.
Embodiment 1
(1) selection of close spiral shell and male and female differentiate
Select Hainan Babylonia areolata (Lamarck) of shell height 5.5-8.5cm, body weight 40-80g, select Thailand's Babylonia areolata (Lamarck) of shell height 5.5-7.0cm, average shell height about 6.0cm, body weight 35-55g, both all select natural spiral shell.
Adopt four foot rests (brandreth or yoke) of long 75cm, wide 40cm, high 30cm, frame is laid out the glass aquarium of long 70cm, wide 40cm, high 50cm, or the box like object taking with wide 50cm, high 30-40cm, lay out the glass aquarium of long 70cm, wide 40cm, high 50cm between two objects.Aquarium water inlet 10cm, about 50, close spiral shell put into for 1 time by an aquarium.After close spiral shell abdominal foot launches to climb tank wall, start unaided eye discrimination.Quick method: the close spiral shell of climbing tank wall, observe and whether have mating device and abdominal foot mouth, as having the mating device of grain of rice shape on the right side of close spiral shell abdominal foot and (between front foot and metapedes) rotund abdominal foot mouth large less than mung bean bottom abdominal foot, male close spiral shell can be judged to be; As there is no the mating device of grain of rice shape on the right side of close spiral shell abdominal foot, and bottom abdominal foot, there is the large rotund abdominal foot mouth of mung bean, being namely judged to be female close spiral shell.
(2) different geographic populations parent spiral shell hybridization
The female close spiral shell of different geographic populations, male close spiral shell are separately supported in different cement pit, then carries out fortification with oyster, squid, crab class for bait; After close spiral shell all enters spawning season, the female spiral shell of observation different geographic populations is laid eggs does not have the time of fertilization (when observation embryo does not grow), female for Hainan Babylonia areolata (Lamarck) close spiral shell and the male close spiral shell of Thailand's Babylonia areolata (Lamarck) are put in same pond, according to the proportioning natural mating of 1: 1.2; Female for Thailand's Babylonia areolata (Lamarck) close spiral shell and the male close spiral shell of Hainan Babylonia areolata (Lamarck) are put in another pond, according to the proportioning natural mating of 1: 1.2;
(3) close spiral shell fortification of matching is cultivated
Different geographic populations male and female are matched in 10-20m
3water body cement pit, cultivates.With crab class, oyster, squid, clam worm for bait, day bait throwing in 1 time, daily ration, feeding quantity is just to have ingested or the residual bait of minute quantity is advisable; Water temperature regulate and control is at 26-30 DEG C; Continuous flowing water and inflation, day streamflow be cultivate water body 3-5 doubly;
(4) egg capsule collection and hatching
1-2 days before the young hatches, after draining to depth of water 5-10cm, adopt ovum personnel to enter in pond and collect egg capsule with fishing net, egg capsule is positioned in the rectangular plastic charging basket that size is 30cm × 20cm × 8cm, aperture is 0.5cm together with sand grains adherance when gathering, again the plastic crate that egg capsule is housed is put into nursery pond after 200mg/L formalin sterilization 1-2min to hatch, during hatching, continuous micro-inflation, keeps good water quality.
(5) larvae cultivation
Nursery pond specification is 15-30m
3indoor water mud sump.
Just hatching veliger breeding density is 0.10-0.20/mL, after egg capsule is hatched, bait throwing in every day 2 times, with unicellular algas such as Chaetoceros muelleri, chlorella and Isochrysis galbana for bait, supplement spirulina powder of throwing something and feeding, each feeding volume of single-cell algae is 3-6 × 10 simultaneously
4individual/mL, each feeding volume of spirulina powder is 0.06-0.09g/m
3.
4-10 days after larvae hatch, except throw something and feed single-cell algae and spirulina powder, increase the prawn slice and BP of throwing shrimp seed rearing use, bait throwing in every day 2 times, each feeding volume of single-cell algae is 3-6 × 10
4individual/mL, each feeding volume of spirulina powder is 0.1-2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.03-0.3g/m
3, each feeding volume of BP is 0.03-0.07g/m
3; Also throw in B B-complex every day 2 times, each feeding volume is 0.03-0.1g/m
3;
Within after larvae hatch the 11st day, to abnormal, stop throwing unicellular alga, bait throwing in every day 2 times, each daily ration, feeding quantity of spirulina powder is 2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.3g/m
3, each daily ration, feeding quantity of Bp is 0.07g/m
3; Throw in B B-complex every day 2 times, each daily ration, feeding quantity is 0.1g/m
3;
When larva starts metamorphosis for young spiral shell, each 2 times of bait throwing in every day spirulina powder, prawn slice and BP, each daily ration, feeding quantity of spirulina powder is 2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.3g/m
3, each feeding volume of BP is 0.07g/m
3, also start freezing artemia nauplii of throwing something and feeding, each daily ration, feeding quantity of artemia nauplii is every square of water surface 0.3-0.5g, throws 3 day, is advisable after after bait throwing in 2 hours without residual bait.
During larvae hatch, the depth of water is 0.8m, within the 3rd day, starts to add 5cm filtering sea every day, is increased to the 1m depth of water to water level during 7-8 days.Larvae hatch starts to change water for the 8th day or the 9th day, and every 1-2 days changes water once, and each quantity of exchanged water is the 20-30% of seedling water; The equal continuity inflation of larvae cultivation overall process, during larvae cultivation, aeration quantity is consistent substantially, dissolved oxygen is made to keep more than 5mg/L, after the most of metamorphosis of larva is young spiral shell, inflation 30min is stopped when bait throwing in, make, at the bottom of the bait sinking ponds such as artemia nauplii, prawn slice, spirulina powder, to be convenient to firm abnormal young spiral shell and to ingest.
(6) young spiral shell is cultivated
When the young spiral shell of living is dwelt in larva whole metamorphosis the end of for, collect young spiral shell.First drain larval rearing water, then with making young spiral shell enter bolting silk bag from discharge outlet outflow at the bottom of seawater flushing pond, the younger spiral shell of metamorphosis collected being put in plastic basin, rinsing removal of contamination with filtering sea.Adopt gravimetric method number of computations, in then young spiral shell being put at the bottom of without sand cement pit, carry out mark slightly.
Use and carry out the cultivation in early stage of young spiral shell without the husky cement pit of paving, according to the area at the bottom of pond, breeding density is 1.0-2.0 ten thousand/m
2cultivate 9-12 days, with artemia nauplii bait, bait throwing in every day 2 times, within 1-5 days, artemia nauplii daily ration, feeding quantity throws 3-5g with every ten thousand young spiral shell days, and after the 6th day, artemia nauplii daily ration, feeding quantity throws 5-10g with every ten thousand young spiral shell days, except stopping flowing water with except inflation 60min during bait throwing in, keep flowing water and inflation At All Other Times, day streamflow be seedling water 2 times.Cultivate early stage and terminate the young spiral shell of rear drainage collection, with gravimetric method sampling statistics survival spiral shell number.The young spiral shell shell height that premenstruum (premenstrua) cultivates is 2-3mm, and every gram of young spiral shell is 100-200.
Young spiral shell after cultivation premenstruum (premenstrua) is moved on in the indoor or outdoors cement pit of the thick fine sand of laying 3 ㎝ and carries out the thick cultivation of later stage mark, depth of water 0.6-0.8m, according to the area at the bottom of pond, young spiral shell breeding density is 10000/m
2left and right, with oyster, squid, shrimp, crab and/or chilled fish for bait, shrimp, squid and chilled fish are thrown something and fed after mincing, crab is throw something and feed after broken shell, day bait throwing in 3-4 time, during beginning, every ten thousand young spiral shell day bait throwing in 20-40g, increase gradually according to the situation of ingesting, reach 180-200g to later stage every ten thousand young spiral shell day bait throwing in, generally ingested with after bait throwing in 2 hours and be advisable.Stop inflation after bait throwing in and stop flowing water 1 hour, keeping flowing water and inflation At All Other Times, day streamflow be seedling water 1-2 doubly.Like climbing out of the water surface due to young spiral shell and cause death, death occurs for preventing young spiral shell from climbing out of the water surface dry dew, the fibre fluff sideband that the pool wall that the water surface has a common boundary is pasted aluminum alloy doors and windows is that obstruction is with.Later stage cultivates and cultivates as spiral shell seedling up to namely can be used for 0.6-1.0cm to young spiral shell shell for 40-50 days.
In year December in August, 2013 to 2014, carry out 12 batches of Thailand's Babylonia areolata (Lamarck) ♀ × Hainan Babylonia areolata (Lamarck)s
with 4 batches of Hainan Babylonia areolata (Lamarck) ♀ × Thailand's Babylonia areolata (Lamarck)s
hybrid seedlings breed.Thailand's Babylonia areolata (Lamarck) ♀ × Hainan Babylonia areolata (Lamarck)
breed shell height 0.6-1.0cm hybrid seedlings 7,830,000 altogether; Hainan Babylonia areolata (Lamarck) ♀ × Thailand's Babylonia areolata (Lamarck)
breed shell height 0.6-10.0cm hybrid seedlings 4,350,000 altogether.
Thailand's Babylonia areolata (Lamarck) ♀ × Hainan Babylonia areolata (Lamarck)
hybrid seedlings cultivates 5 months, cultivation survival rate 98.2%, every square metre of output 14kg, the output value 1120 yuan.Institute's crop is than cultivation Thailand Babylonia areolata (Lamarck) seed volume increase 14.5%, and every square metre of cultured area increases the output value 144 yuan; Than cultivation Hainan Babylonia areolata (Lamarck) seed volume increase 20.3%, every square metre of cultured area increases the output value 189.6 yuan.
Hainan Babylonia areolata (Lamarck) ♀ × Thailand's Babylonia areolata (Lamarck)
hybrid seedlings cultivates 5 months, cultivation survival rate 95.3%, every square metre of output 13.2kg, the output value 1056 yuan.Institute's crop is than cultivation Thailand Babylonia areolata (Lamarck) seed volume increase 8.2%, and every square metre of cultured area increases the output value 80 yuan; Than the Babylonia areolata (Lamarck) seed cultivation volume increase 14.4% of cultivation Hainan, every square metre of cultured area increases the output value 133.6 yuan.Two groups of hybrid seedlings all have fast growth, premunition is strong, cultivation survival rate is high, can reduce the farming disease harms and improve the quality of products, and obtaining good fanning economics.
Be described in detail specific embodiments of the invention above, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (8)
1. a mating system for Babylonia areolata (Lamarck) hybrid seedlings, is characterized in that, comprises the following steps:
(1) selection of close spiral shell and male and female differentiate
Select Hainan Babylonia areolata (Lamarck) of shell height 5.5-8.5cm, body weight 40-80g, select Thailand's Babylonia areolata (Lamarck) of shell height 5.5-7.0cm, body weight 35-55g, both all select natural spiral shell; After male and female differentiate, male and female parent spiral shell is separately put in a suitable place to breed in different cement pit;
(2) different geographic populations parent spiral shell hybridization
The male and female parent spiral shell of different geographic populations, all carries out fortification with oyster, squid, crab class for bait; After close spiral shell all enters spawning season, allow the female close spiral shell of Hainan Babylonia areolata (Lamarck) and the male close spiral shell of Thailand's Babylonia areolata (Lamarck) according to the proportioning natural mating of 1: 1.1-1.3 in same pond, and/or allow the female close spiral shell of Thailand's Babylonia areolata (Lamarck) and the male close spiral shell of Hainan Babylonia areolata (Lamarck) in another pond according to the proportioning natural mating of 1: 1.1-1.3;
(3) close spiral shell fortification of matching is cultivated
With crab class, oyster, squid, clam worm for bait, day bait throwing in 1 time, daily ration, feeding quantity is just to have ingested or the residual bait of minute quantity is advisable; Water temperature regulate and control is at 26-30 DEG C; Continuous flowing water and inflation, day streamflow be cultivate water body 3-5 doubly;
(4) egg capsule collection and hatching
1-2 days before the young hatches, collect egg capsule, put into nursery pond after sterilization and hatch, during hatching, continuous micro-inflation, keeps good water quality;
(5) larvae cultivation
Just hatching veliger breeding density is 0.10-0.20/mL, after egg capsule is hatched, bait throwing in every day 2 times, with unicellular algas such as Chaetoceros muelleri, chlorella and Isochrysis galbana for bait, supplement spirulina powder of throwing something and feeding, each feeding volume of single-cell algae is 3-6 × 10 simultaneously
4individual/mL, each feeding volume of spirulina powder is 0.06-0.09g/m
3;
4-10 days after larvae hatch, except throw something and feed single-cell algae and spirulina powder, increases the prawn slice and BP of throwing shrimp seed rearing use, bait throwing in every day 2 times.The each feeding volume of single-cell algae is 3-6 × 10
4individual/mL, each feeding volume of spirulina powder is 0.1-2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.03-0.3g/m
3, each feeding volume of BP is 0.03-0.07g/m
3; Also throw in B B-complex every day 2 times, each feeding volume is 0.03-0.1g/m
3;
Within after larvae hatch the 11st day, to abnormal, stop throwing unicellular alga, bait throwing in every day 2 times, each daily ration, feeding quantity of spirulina powder is 2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.3g/m
3, each daily ration, feeding quantity of Bp is 0.07g/m
3; Throw in B B-complex every day 2 times, each daily ration, feeding quantity is 0.1g/m
3;
When larva starts metamorphosis for young spiral shell, each 2 times of bait throwing in every day spirulina powder, prawn slice and BP, each daily ration, feeding quantity of spirulina powder is 2.0g/m
3, each daily ration, feeding quantity of prawn slice is 0.3g/m
3, each feeding volume of BP is 0.07g/m
3; Start freezing artemia nauplii of throwing something and feeding, each daily ration, feeding quantity of artemia nauplii is every square of water surface 0.3-0.5g, throws 3 day;
Larvae hatch starts to change water for the 8th day or the 9th day, and every 1-2 days changes water once, and each quantity of exchanged water is the 20-30% of seedling water; The equal continuity inflation of larvae cultivation overall process, makes dissolved oxygen keep more than 5mg/L, after the most of metamorphosis of larva is young spiral shell, stops inflation 20-40min, make at the bottom of bait sinking pond, be convenient to firm abnormal young spiral shell and ingest when bait throwing in;
(6) young spiral shell is cultivated
When the young spiral shell of living is dwelt in larva whole metamorphosis the end of for, collect young spiral shell;
Use and carry out the cultivation in early stage of young spiral shell without the husky cement pit of paving, according to the area at the bottom of pond, breeding density is 1.0-2.0 ten thousand/m
2cultivate 9-12 days, with artemia nauplii bait, bait throwing in every day 2 times, within 1-5 days, artemia nauplii daily ration, feeding quantity throws 3-5g with every ten thousand young spiral shell days, and after the 6th day, artemia nauplii daily ration, feeding quantity throws 5-10g with every ten thousand young spiral shell days, except stopping flowing water with except inflation 50-70min during bait throwing in, keep flowing water and inflation At All Other Times, day streamflow be seedling water 1.5-3 doubly;
The young spiral shell that premenstruum (premenstrua) cultivates is moved on in the cement pit laying fine sand and carries out later stage cultivation, depth of water 0.6-0.8m, according to the area at the bottom of pond, young spiral shell breeding density is 9000-11000 grain/m
2, with oyster, squid, shrimp, crab and/or chilled fish for bait, day bait throwing in 3-4 time, feeding volume is advisable to have ingested in 100-140min after bait throwing in; Except stopping flowing water with except inflation 50-70min during bait throwing in, keep flowing water and inflation At All Other Times, day streamflow be seedling water 1-2 doubly; Later stage cultivates and cultivates as spiral shell seedling up to namely can be used for 0.6-1.0cm to young spiral shell shell for 40-50 days.
2. mating system according to claim 1, it is characterized in that, glass aquarium is adopted when male and female differentiate, water inlet 8-12cm, after close spiral shell abdominal foot launches to climb tank wall, start unaided eye discrimination: the close spiral shell of climbing tank wall, observe whether have mating device and abdominal foot mouth, as having the mating device of grain of rice shape on the right side of close spiral shell abdominal foot and rotund abdominal foot mouth large less than mung bean bottom abdominal foot, male close spiral shell can be judged to be; As there is no the mating device of grain of rice shape on the right side of close spiral shell abdominal foot, and bottom abdominal foot, there is the large rotund abdominal foot mouth of mung bean, being namely judged to be female close spiral shell.
3. mating system according to claim 2, is characterized in that, described glass aquarium is placed on the base of high 30-40cm.
4. mating system according to claim 1, is characterized in that, in step (4), sterilization employing concentration is the formalin sterilization immersion 0.5-1min of 100-200mg/L.
5. mating system according to claim 1, is characterized in that, in step (5), during larvae hatch, the depth of water is 0.8m, within the 3rd day, starts to add 4-6cm filtering sea every day, is increased to 1m dark to water level during 7-8 days.
6. mating system according to claim 1, it is characterized in that, in step (6), later stage cultivates every ten thousand young spiral shell day bait throwing in 20-40g when starting, increase gradually according to the situation of ingesting, reach 180-200g to later stage every ten thousand young spiral shell day bait throwing in, feeding volume is advisable to have ingested in 100-140min after bait throwing in.
7. mating system according to claim 1, is characterized in that, in step (6), when the later stage, mark was slightly cultivated, the pool wall that the water surface has a common boundary is arranged and stops band, prevents young spiral shell from climbing out of the dry dew of the water surface and occurring dead.
8. mating system according to claim 7, is characterized in that, the described band that stops is for being pasted onto the fibre fluff sideband on the pool wall of water surface boundary.
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