CN107581106B - A kind of artificial propagation method of round swallowfish - Google Patents
A kind of artificial propagation method of round swallowfish Download PDFInfo
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- CN107581106B CN107581106B CN201710891104.XA CN201710891104A CN107581106B CN 107581106 B CN107581106 B CN 107581106B CN 201710891104 A CN201710891104 A CN 201710891104A CN 107581106 B CN107581106 B CN 107581106B
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Abstract
本发明公开了一种圆燕鱼的人工繁殖方法，包括以下步骤：1亲本选择、2亲鱼的网箱强化培育、3亲鱼催产、4受精卵的收集和处理、5受精卵孵化、6苗种的池塘培育。本发明通过对圆燕鱼的亲本培育，促使亲鱼产卵，然后用受精卵孵化出仔鱼、培育成能供养殖的鱼种，为圆燕鱼的大规模养殖创造条件。同时，本发明为海水鱼类人工增养殖增加了新品种，对圆燕鱼自然资源的恢复和养殖产业发展起到了极其重要的作用。The invention discloses a method for artificial propagation of round swallowfish, which comprises the following steps: 1. selection of parents, 2. intensive cultivation of broodstock in cages, 3. induction of spawning of broodstock, 4. collection and treatment of fertilized eggs, 5. hatching of fertilized eggs, 6. seedlings pond cultivation. The present invention promotes the broodstock to lay eggs by cultivating the parents of the round swallowfish, and then uses the fertilized eggs to hatch the larvae and cultivate them into fish species that can be cultured, thereby creating conditions for the large-scale cultivation of the round swallowfish. Simultaneously, the present invention adds new species to the artificial breeding of marine fishes, and plays an extremely important role in the restoration of the natural resources of the swallow fish and the development of the breeding industry.
Description
Technical field
The present invention relates to technical field of aquaculture, and in particular to a kind of artificial fecundation method of platax orbicularis.
Background technique
Platax orbicularis (scientific name:Platax orbicularis) also known as circle eye Spanish mackerel, circle bat etc., it is Perciformes, pierces tail fish
Suborder, orbfish section, a kind of seawater fish in the life of torrid areas immediate offshore area that Spanish mackerel belongs to are distributed in India-Western Pacific
Warm water waters, North gets South Japan, central Pacific island are arrived up to Australia, east in south, west to the eastern bank in Red sea and Africa, China
Originate in the South Sea.
Platax orbicularis lives in 5-30 meters deeply, has the sea area that slightly mud is protected, haunts about near the accident shipwreck of deep-sea.
Juvenile fish mainly inhabites in shallow sea or river mouth waters, because body colour is withered and yellow brown, meeting mimicry is hidden at dead leaf shape in floating on water
Under object, often alone or groupuscule travelling in lagoon inner bay.Adult fish then gos deep into about 30 meters of Coral Reef Regions below, on its peripheral slope
It is in pairs or movable in groups.Circle eye Spanish mackerel belongs to the omnivorous fish of day row, is mainly with algae, invertebrate or small fish
Food.Platax orbicularis juvenile fish fine figure, can be used as ornamental fish；Adult fish is then edible, delicious meat.
Due to excessive fishing, so that the population quantity of platax orbicularis is greatly decreased, the market supply is limited, is unable to satisfy city
The demand of field.Currently, the artificial scale breeding technology of platax orbicularis has not yet to see and has been reported that.Artificial scale breeding technology not at
Ripe is to restrict its one of key factor for propagating industry development artificially.
Summary of the invention
It is an object of that present invention to provide a kind of artificial fecundation methods of platax orbicularis to be promoted by the parent culture to platax orbicularis
So that parent population is laid eggs, then goes out prelarva with incubating oosperm, cultivates at can establish for the fingerling of cultivation for large-scale cultivation platax orbicularis
Basis.
A kind of artificial fecundation method of platax orbicularis, includes the following steps：
(1) Juvenile stage
Parental source is the platax orbicularis of the capture of natural sea area or raising in cage, selects 4 more than age, weight 3.0-5.0kg, body
Type is normal, disease-free, energetic, and the good platax orbicularis of gonad development is as parent；
(2) aquaculture net cage parent population reinforced cultivating
Select wind sheltering condition is good, water flow is unimpeded, depth of water 5m or more, sea area flow velocity less than 0.1m/s inner bay or shallow sea set
Aquaculture net cage is set, 3 months progress parent population reinforced cultivatings before mating period；Artificial expanding compound feed is fed daily twice, upper,
It in each 1 time of afternoon, is satiated with food and feeds, feed can add 0.2% fish oil, 0.5% multi-vitamins and 0.2% vitamin E, promote sexual gland
Development；
(3) parent population is hastened parturition
It hastens parturition at sea to lay eggs and carry out in net cage, start April to progressively reach sexual gland maturation by the parent population of reinforced cultivating,
It can carry out artificial induced spawning；Oxytocic hormone uses human chorionic gonadtropin HCG, ovulation induction No. 2 LRH-A2 of element and ovulation induction element 3
Number LRH-A3, injection oxytocic hormone are injected using dorsal muscles, are put into and are laid eggs in net cage after injection, through hormone induction 30-38h, allow it
Naturally smart ovum, fertilization are discharged；
(4) collection and processing of fertilized eggs
After parent population oviposition, prepare 2 0.5t taper hatching barrels in advance, it is 1 cun of drainage switch that, which there is bore at cone bottom, with 200
Mesh filtering mesh bag or 200 mesh cotton bags filter nature seawater, and 80% water level is added in hatching barrel, then using bottom row's method removal
Bad ovum and sundries in fertilized eggs；
(5) pond nursery
A, clear pond rich water
It is thoroughly cleaned up the pond with quick lime, apply fertilizer rich water, puts fertilized eggs after clear pond 10-15d, the 3-5d training before launching fertilized eggs
Educate hydroplankton, in fine day, per acre press 1m water gage, splash rich water king 1-1.5kg, then apply viable bacteria 1kg and fermentation after
Anchovy sauce 1kg, daytime starts aerator promotion phytoplankton growth after fertilising；
B, incubating oosperm
It is 3.0m × 3.0m × 1.3m or 3.0m × 4.0m × 1.3m cloth basket formula incubator, cloth that volume is built in pond
It is blocked above basket with shading net, micro- inflation hatching；Hatching density is ten thousand/m of 8-123, in the item of 25-30 DEG C of water temperature, salinity 28
Under part, embryo passes through the development of 36-48h, hatches into prelarva；
C, seed is put in a suitable place to breed
The 2nd day after prelarva hatching, prelarva is put into pond from incubator, launches ten thousand tail of prelarva 10-12 per acre；
D, bait throwing in
Protozoan and wheel animalcule in the pool 1d-7d, 7d-12d artemia nauplii bait and Copepods cladocera, seedling after 13d
Body, which has, looks for bait in water surface travelling, and initial stage starts to feed eel powder and hand fit's powder, when fry body is up to 2.5cm or more,
Cooperation buoyancy feed can be fed, particle diameter can feed protozoan in the pool, wheel animalcule, artemia nauplii in 0.7mm, 7d
The mixed fodder of bait and Copepods cladocera；
F, row changes water
Putting seedling initial stage does not change water, adds water 1% daily, changes water 10% daily after 14, feeds cooperation buoyancy feed；
E, daily management
The variation of observation water colour and seed activity condition daily, change water, oxygenation in time；Daily record water Inversion phenomenon, weather,
A situation arises and disease control measure for the environmental factor and the activity condition of fish, situation of ingesting, health status, disease of stormy waves,
Carry out cultivation log；
G, it harvests
After one month, fry overall length reaches 3.0cm, and juvenile fish metamorphosis can carry out intermediate rearing or directly cultivation when completing.
Preferably, the artificial fecundation method of the platax orbicularis, in step 2, parent fish rearing marine environment factor requirements：It is molten
Solve oxygen > 4mg/L；pH7.8-8.4；Salinity 23-35；20-30 DEG C of water temperature；Transparency 60-80cm；Intensity of illumination >=3000Lx.By force
Changing cultivation density is that 5.5-6.0m × 5.5-6.0m × 3.0-6.0m net cage puts parent population 100-200 tail in a suitable place to breed.
Preferably, the artificial fecundation method of the platax orbicularis, in step 2, count by weight percentage, artificial extruding is matched
Close feed nutrition requirement：Crude protein content >=40%, crude fat >=6%, crude fibre≤4%, ash content≤14%, calcium 1-4%, always
Phosphorus >=1.2%, lysine >=2.1%.
Preferably, the artificial fecundation method of the platax orbicularis, in step 3, chorion rush had both been can be used in oxytocic hormone
Gonadal hormone HCG, ovulation induction No. 2 LRH-A2 of element and the plain No. 3 LRH-A3 one of which of ovulation induction, also can be used chorion rush property
The hormotone of No. 3 LRH-A3 of glandular hormone HCG and ovulation induction No. 2 LRH-A2 of element or ovulation induction element；Wherein HCG injection dosage is
400-800U/kg, LRH-A2 or LRH-A3 are 4-6 μ g/kg, and male halves.
Preferably, the artificial fecundation method of the platax orbicularis, in step 3, oxytocic hormone injecting method is as follows：By HCG,
LRH-A2 and LRH-A3 is dissolved in respectively in 0.6% sodium chloride solution of 100ML, then by HCG and LRH-A2 or HCG and LRH-
Bis- kinds of solution mixing of A3, carry out intramuscular injection with single solution or mixed solution and hasten parturition.
Preferably, the artificial fecundation method of the platax orbicularis, in step 3, oviposition net cage and aquaculture net cage are 60-80
Mesh sieve tulles are made into, and oviposition net cage covers in aquaculture net cage.
Preferably, the artificial fecundation method of the platax orbicularis, in step 4, the washing methods of fertilized eggs：Fertilized eggs are used
It receives ovum net to pull out, is collected into collection ovum net, then fertilized eggs are collected into 10kg breaker, the fertilized eggs in keg is poured into standby
In the hatching barrel of 80% water, allows fertilized eggs to filter from the fishing net of 40 mesh, impurity is filtered；The screening technique of fertilized eggs：
It is lightly stirred clockwise in hatching barrel with wooden dipper, rotates water in hatching barrel, until there is no fertilized eggs to sink to a barrel bottom, then allow
Water is naturally static, then will accumulate in barrel bad ovum at bottom and sundries removal with bottom row's method, repeats this method 2-3 times, then with 100 mesh hands
Diddle-net picks up fertilized eggs, is rinsed with fresh seawater.
Preferably, the artificial fecundation method of the platax orbicularis in step 4, collects the keed long 6m, Nang Kougao of ovum net
1.2m, distal opening diameter 0.4m, two sides respectively set long 6m wing lattice, high 1.2m, the high 0.9m in end among wing lattice.
In conclusion a kind of artificial propagation method of platax orbicularis of the invention has the beneficial effect that：
(1) platax orbicularis is the species of a great breeding prospect, and the present invention obtains the prelarva of batch by artificial propagation,
To create conditions for the large-scale farming of platax orbicularis.
(2) present invention is that seawater fish artificial increasing cultivation increases new varieties, recovery to platax orbicularis natural resources and is supported
Grow industrialized development play the role of it is extremely important.
Specific embodiment
Clear, complete description is carried out below with reference to technical effect of the embodiment to design and generation of the invention, with
It is completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is that a part of the invention is implemented
Example, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art is not before making the creative labor
Other embodiments obtained are put, the scope of protection of the invention is belonged to.
A kind of artificial fecundation method of platax orbicularis, includes the following steps：
(1) Juvenile stage
Parental source is the platax orbicularis of the capture of natural sea area or raising in cage, selects 4 more than age, weight 3.0-5.0kg, body
Type is normal, disease-free, energetic, and the good platax orbicularis of gonad development is as parent；
(2) aquaculture net cage parent population reinforced cultivating
Select wind sheltering condition is good, water flow is unimpeded, depth of water 5m or more, sea area flow velocity less than 0.1m/s inner bay or shallow sea set
Aquaculture net cage is set, 3 months progress parent population reinforced cultivatings before mating period；Artificial expanding compound feed is fed daily twice, upper,
It in each 1 time of afternoon, is satiated with food and feeds, feed can add 0.2% fish oil, 0.5% multi-vitamins and 0.2% vitamin E, promote sexual gland
Development；
(3) parent population is hastened parturition
It hastens parturition at sea to lay eggs and carry out in net cage, start April to progressively reach sexual gland maturation by the parent population of reinforced cultivating,
It can carry out artificial induced spawning；Oxytocic hormone uses human chorionic gonadtropin HCG, ovulation induction No. 2 LRH-A2 of element and ovulation induction element 3
Number LRH-A3, injection oxytocic hormone are injected using dorsal muscles, are put into and are laid eggs in net cage after injection, through hormone induction 30-38h, allow it
Naturally smart ovum, fertilization are discharged；
(4) collection and processing of fertilized eggs
After parent population oviposition, prepare 2 0.5t taper hatching barrels in advance, it is 1 cun of drainage switch that, which there is bore at cone bottom, with 200
Mesh filtering mesh bag or 200 mesh cotton bags filter nature seawater, and 80% water level is added in hatching barrel, then using bottom row's method removal
Bad ovum and sundries in fertilized eggs；
(5) pond nursery
A, clear pond rich water
It is thoroughly cleaned up the pond with quick lime, apply fertilizer rich water, puts fertilized eggs after clear pond 10-15d, the 3-5d training before launching fertilized eggs
Educate hydroplankton, in fine day, per acre press 1m water gage, splash rich water king 1-1.5kg, then apply viable bacteria 1kg and fermentation after
Anchovy sauce 1kg, daytime starts aerator promotion phytoplankton growth after fertilising；
B, incubating oosperm
It is 3.0m × 3.0m × 1.3m or 3.0m × 4.0m × 1.3m cloth basket formula incubator, cloth that volume is built in pond
It is blocked above basket with shading net, micro- inflation hatching；Hatching density is ten thousand/m of 8-123, in the item of 25-30 DEG C of water temperature, salinity 28
Under part, embryo passes through the development of 36-48h, hatches into prelarva；
C, seed is put in a suitable place to breed
The 2nd day after prelarva hatching, prelarva is put into pond from incubator, launches ten thousand tail of prelarva 10-12 per acre；
D, bait throwing in
Protozoan and wheel animalcule in the pool 1d-7d, 7d-12d artemia nauplii bait and Copepods cladocera, seedling after 13d
Body, which has, looks for bait in water surface travelling, and initial stage starts to feed eel powder and hand fit's powder, when fry body is up to 2.5cm or more,
Cooperation buoyancy feed can be fed, particle diameter can feed protozoan in the pool, wheel animalcule, artemia nauplii in 0.7mm, 7d
The mixed fodder of bait and Copepods cladocera；
F, row changes water
Putting seedling initial stage does not change water, adds water 1% daily, changes water 10% daily after 14, feeds cooperation buoyancy feed；
E, daily management
The variation of observation water colour and seed activity condition daily, change water, oxygenation in time；Daily record water Inversion phenomenon, weather,
A situation arises and disease control measure for the environmental factor and the activity condition of fish, situation of ingesting, health status, disease of stormy waves,
Carry out cultivation log；
G, it harvests
After one month, fry overall length reaches 3.0cm, and juvenile fish metamorphosis can carry out intermediate rearing or directly cultivation when completing.
Embodiment 1-3, comparative example 1-3 are according to above-mentioned cultivation step, cultivation parameter shown in the following table 1, water area condition shown in table 2
It is cultivated, the results are shown in Table 3：
1 embodiment 1-3 of table, comparative example 1-3 cultivate parameter：
2 embodiment 1-3 of table, comparative example 1-3 water area condition：
| Unit | Embodiment 8 | Embodiment 9 | Embodiment 10 | Comparative example 9 | Comparative example 10 | Comparative example 11 | |
| The depth of water | m | 6 | 5 | 7 | 4 | 3 | 4 |
| Dissolved oxygen | mg/L | 4.3 | 4.5 | 4.6 | 3.9 | 3.6 | 3.8 |
| Flow velocity | m/s | 0.09 | 0.08 | 0.08 | 0.11 | 0.09 | 0.12 |
| PH | —— | 7.8-8.2 | 8.0-8.4 | 8.0-8.2 | 7.4-8.0 | 8.2-8.6 | 8.4-8.6 |
| Salinity | —— | 28-35 | 23-30 | 25-31 | 20-23 | 34-40 | 28-34 |
| Water temperature | Degree Celsius | 20-30 | 25-30 | 20-25 | 17-21 | 29-35 | 17-25 |
| Transparency | cm | 70-80 | 60-70 | 60-70 | 50-60 | 80-90 | 60-70 |
| Light intensity | LX | 3000 | 3200 | 3400 | 3000 | 2500 | 2800 |
3 embodiment 1-3 of table, comparative example 1-3 cultivate situation：
| Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Hatching density | Ten thousand/M3 | 10 | 11 | 11.5 | 14 | 5 | 6 |
| Embryonic Development Time | h | 36-38 | 40-48 | 36-42 | 50-61 | 49-57 | 58-64 |
| Rate of embryonic death | % | 0.5 | 1.1 | 0.9 | 24 | 15 | 19 |
| Fry culturing time | D | 30 | 28 | 33 | 40 | 38 | 45 |
| The breeding process death rate | % | 1.2 | 0.8 | 0.7 | 10.5 | 12.4 | 11.7 |
From above-mentioned culture experiment result can be seen that according to given condition of the present invention can obtain rate of embryonic death it is lower,
The breeding process death rate is low, and embryonic development is very fast, growth time is very fast, the more appropriate platax orbicularis fry of hatching density.Control
Condition is unreasonable, then will lead to platax orbicularis rate of embryonic death and the breeding process death rate increases, in addition, embryonic Development Time and at
Also can accordingly it extend for a long time.
Feed Ratio Experiments：
According to the given breeding environment of embodiment 3, change platax orbicularis feed formula such as table 4, designs following embodiment and comparison
Example：
4 platax orbicularis forage compounding of table：
As can be seen that the speed of growth of platax orbicularis can be increased according to the given feed formula of the present invention.Wherein, comparative example 5
Insufficient on crude protein, total phosphorus, lysine, still, crude fibre, ash content etc. add excessively again, cause platax orbicularis growth slow
Slowly.
The experiment of egg-collecting box size：
According to 3 culture environment of embodiment, 5 forage compounding of embodiment, according to 5 given condition of table design egg-collecting box shape and greatly
Small, comparison of design example, other conditions are consistent.
The experiment of 5 egg-collecting box size of table：
Pass through above-mentioned experiment, it is found that according to institute of the invention to egg-collecting box shapes and sizes can obtain 11.5 ten thousand tails/
The hatching density of cubic meter, and the smaller 0.9% hatching death rate.The given egg-collecting box of comparative example 7 is too small, leads to hatching density
Height, the death rate is larger, and comparative example 8 to egg-collecting box be open it is excessive, box volume is excessive, cause hatching density to decline, meanwhile,
The death rate also increases.
Oxytocic hormone experiment：
According to 3 culture environment of embodiment, 5 forage compounding of embodiment, embodiment 7 give egg-collecting box design, other conditions protect
It holds unanimously, designs embodiment 8-13, the results are shown in Table 6；Comparative example 9-14, the results are shown in Table 7：
The experiment of 6 embodiment 8-13 oxytocic hormone of table：
The experiment of 7 comparative example 9-14 oxytocic hormone of table：
| Unit | Comparative example 9 | Comparative example 10 | Comparative example 11 | Comparative example 12 | Comparative example 13 | Comparative example 14 | |
| HCG | U/KG | 300 | 1000 | 300 | 0 | 0 | 0 |
| LRH-A2 | ug/kg | 5 | 2 | 0 | 0 | 10 | 0 |
| LRH-A3 | ug/kg | 5 | 0 | 0 | 10 | 5 | 3 |
| Laying | Ten thousand/M3 | 6 | 10 | 9 | 15 | 12 | 7 |
As can be seen that single use human chorionic gonadtropin HCG, ovulation induction No. 2 LRH-A2 of element and ovulation induction element 3
LRH-A3 is one of, or is swashed using human chorionic gonadtropin HCG and ovulation induction No. 2 LRH-A2 of element or chorionic gonadotrophin
The hormotone of No. 3 LRH-A3 of plain HCG and ovulation induction element can obtain 180,000 every cubic metre or more of oviposition quantity.But
It is, in single use human chorionic gonadtropin HCG, ovulation induction No. 2 LRH-A2 of element and the plain No. 3 LRH-A3 one of which of ovulation induction
When, the too high or too low oviposition quantity that will lead to of dosage reduces；Quantity reduction of laying eggs can be made by being used in mixed way 3 kinds of oxytocic hormones also；
In addition, using human chorionic gonadtropin HCG and ovulation induction element No. 2 LRH-A2 or human chorionic gonadtropin HCG and ovulation induction
When the hormotone of No. 3 LRH-A3 of element, change the usage amount of a certain hormone, increasing or decreasing can all cause egg laying amount to decline.It is comprehensive
It is upper described, it, should be in strict accordance with the usage amount of the given oxytocic hormone of the present invention when carrying out the injection of platax orbicularis oxytocic hormone.
Above-mentioned the embodiments of the present invention are described in detail, but present invention is not limited to the embodiments described above,
Those skilled in the art within the scope of knowledge, can also make each without departing from the purpose of the present invention
Kind variation.
Claims (7)
1. a kind of artificial fecundation method of platax orbicularis, which is characterized in that include the following steps：
(1) Juvenile stage
Parental source is that natural sea area captures or the platax orbicularis of raising in cage, select 4 more than age, weight 3.0-5.0kg, figure just
Often, disease-free, energetic, the good platax orbicularis of gonad development is as parent；
(2) aquaculture net cage parent population reinforced cultivating
Select wind sheltering condition is good, water flow is unimpeded, depth of water 5m or more, sea area flow velocity less than 0.1m/s inner bay or shallow sea setting support
Net cage is grown, 3 months progress parent population reinforced cultivatings before mating period；Artificial expanding compound feed is fed daily twice, the upper and lower noon
It each 1 time, is satiated with food and feeds, 0.2% fish oil of feed addition, 0.5% multi-vitamins and 0.2% vitamin E promote gonad development；
(3) parent population is hastened parturition
It hastens parturition at sea to lay eggs and carry out in net cage, start April to progressively reach sexual gland maturation by the parent population of reinforced cultivating
Carry out artificial induced spawning；Oxytocic hormone uses human chorionic gonadtropin HCG, ovulation induction No. 2 LRH-A2 of element and ovulation induction element 3
LRH-A3, injection oxytocic hormone are injected using dorsal muscles, are put into oviposition net cage after injection, through hormone induction 30-38h, allow its oneself
So discharge smart ovum, fertilization；
(4) collection and processing of fertilized eggs
After parent population oviposition, prepare 2 0.5t taper hatching barrels in advance, it is 1 cun of drainage switch that, which there is bore at cone bottom, with 200 mesh mistakes
Filter-screen bag or 200 mesh cotton bags filter nature seawater, and 80% water level is added in hatching barrel, then using bottom row's method removal fertilization
Bad ovum and sundries in ovum；
(5) pond nursery
A, clear pond rich water
It is thoroughly cleaned up the pond with quick lime, apply fertilizer rich water, puts fertilized eggs after clear pond 10-15d, and the 3-5d before launching fertilized eggs cultivates water
Middle planktonic organism presses 1m water gage in fine day per acre, and splash rich water king 1-1.5kg, then applies the anchovy sauce after viable bacteria 1kg and fermentation
1kg, daytime starts aerator promotion phytoplankton growth after fertilising；
B, incubating oosperm
Volume is built in pond for 3.0m × 3.0m × 1.3m or 3.0m × 4.0m × 1.3m cloth basket formula incubator, on cloth basket
Side is blocked with shading net, micro- inflation hatching；Hatching density is ten thousand/m of 8-123, under conditions of 25-30 DEG C of water temperature, salinity 28,
Embryo passes through the development of 36-48h, hatches into prelarva；
C, seed is put in a suitable place to breed
The 2nd day after prelarva hatching, prelarva is put into pond from incubator, launches ten thousand tail of prelarva 10-12 per acre；
D, bait throwing in
Protozoan and wheel animalcule in the pool 1d-7d, 7d-12d artemia nauplii bait and Copepods cladocera, seedling body has after 13d
Bait is looked in water surface travelling, initial stage starts to feed eel powder and hand fit's powder, when fry body is up to 2.5cm or more, feeds
Cooperate buoyancy feed, particle diameter is in 0.7mm；
F, row changes water
Putting seedling initial stage does not change water, adds water 1% daily, changes water 10% after 14 days daily, feeds cooperation buoyancy feed；
E, daily management
The variation of observation water colour and seed activity condition daily, change water, oxygenation in time；Record water Inversion phenomenon, weather, stormy waves daily
Environmental factor and the activity condition of fish, situation of ingesting, health status, disease a situation arises and disease control measure, carry out
Cultivate log；
G, it harvests
After January, fry overall length reaches 3.0cm, and juvenile fish metamorphosis can carry out intermediate rearing or directly cultivation when completing.
2. the artificial fecundation method of platax orbicularis according to claim 1, it is characterised in that：The step（ 2）In, parent population
Cultivate marine environment factor requirements：Dissolved oxygen > 4mg/L；pH7.8-8.4；Salinity 23-35；20-30 DEG C of water temperature；Transparency 60-
80cm；Intensity of illumination >=3000Lx；Reinforced cultivating density is that 5.5-6.0m × 5.5-6.0m × 3.0-6.0m net cage puts parent in a suitable place to breed
Fish 100-200 tail.
3. the artificial fecundation method of platax orbicularis according to claim 1, it is characterised in that：The step（ 2）In, by weight
It measures percentage to calculate, artificial expanding compound feed nutritional requirement：Crude protein content >=40%, crude fat >=6%, crude fibre≤
4%, ash content≤14%, calcium 1-4%, total phosphorus >=1.2%, lysine >=2.1%.
4. the artificial fecundation method of platax orbicularis according to claim 1, it is characterised in that：The step（ 3）In, it hastens parturition
Human chorionic gonadtropin HCG, ovulation induction No. 2 LRH-A2 of element and No. 3 LRH-A3 of ovulation induction element wherein one had both can be used in hormone
Kind, the mixing of No. 3 LRH-A3 of human chorionic gonadtropin HCG and ovulation induction No. 2 LRH-A2 of element or ovulation induction element also can be used
Hormone；It is 4-6 μ g/kg that wherein HCG injection dosage, which is 400-800U/kg, LRH-A2 or LRH-A3, and male halves.
5. the artificial fecundation method of platax orbicularis according to claim 1, it is characterised in that：The step（ 3）In, oviposition
Net cage is that 60-80 mesh sieve tulles are made into aquaculture net cage, and oviposition net cage covers in aquaculture net cage.
6. the artificial fecundation method of platax orbicularis according to claim 1, it is characterised in that：The step（ 4）In, fertilization
The washing methods of ovum：Fertilized eggs are pulled out with ovum net is received, are collected into collection ovum net, then fertilized eggs are collected into 10kg breaker
It is interior, the fertilized eggs in keg are poured into the hatching barrel for getting 80% water ready, allow fertilized eggs to filter from the fishing net of 40 mesh, miscellaneous
Matter filters；The screening technique of fertilized eggs：It is lightly stirred clockwise in hatching barrel with wooden dipper, rotates water in hatching barrel, until
There is no fertilized eggs to sink to a barrel bottom, then allow water naturally static, then will accumulate in barrel bad ovum at bottom and sundries removal, weight with bottom row's method
Multiple this method 2-3 times, then fertilized eggs are picked up with 100 mesh fishing nets, are rinsed with fresh seawater.
7. the artificial fecundation method of platax orbicularis according to claim 6, it is characterised in that：The step（ 4）In, collect ovum
The long 6m of the keed of net, the high 1.2m of capsule mouth, distal opening diameter 0.4m, two sides respectively set long 6m wing lattice, high 1.2m among wing lattice, end height
0.9m。
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Denomination of invention: Method of artificial propagation of platax orbicularis Effective date of registration: 20200616 Granted publication date: 20181130 Pledgee: Agricultural Development Bank of China Lingshui Li Autonomous County sub branch Pledgor: HAINAN CHENHAI AQUATIC Co.,Ltd. Registration number: Y2020980003102 |