CN105746404A - Epinephelus akaara fry cultivation method - Google Patents

Abstract

The invention relates to an epinephelus akaara fry cultivation method and belongs to a sea water fish fry cultivation technology. The epinephelus akaara fry cultivation method comprises the following steps: 1) parent fish selection; 2) artificial spawning; 3) spawn distribution; 4) water quality regulation and control; 5) water renewal; 6) feeding. The invention adopts the technical scheme that on the basis of imitating a wild ecological environment, physical and chemical factors are properly adjusted to better adapt to the growth and the development of larvae and juveniles, so that the large-scale cultivation of epinephelus akaara fries is realized.

Description

A kind of epinephelus akaara offspring seed cultivation method

Technical field

The invention belongs to seawater fish rearing of fingerling, be a kind of epinephelus akaara offspring seed cultivation method.

Background technology

Epinephelus akaara fine and tender taste, nutritious, expensive and live body are easily supported and transport temporarily.Owing to fish is as the redness signifying luckiness in Chinese culture, once it was welcome edible fish in Chinese style wedding feast, there is wide breeding prospect.

Epinephelus akaara is famous and precious economic sea-farming fingerling, and due to the physiological and ecological characteristic that it is special, this kind still has bottleneck in parent culture, insemination, hatching and seed rearing.Although the domestic report having some epinephelus akaara seed rearings, but data is more outmoded, can it is few to use for reference part, especially the aspect such as the regulation and control of illumination in seed rearing, Water-quality control, bait proportioning, fortification all has difference.In the world; there are Japan and Korea S in the country of main research, how to study based on molecular biology, disease etc., and industrialization raising technology research is few; open-mouthed bait, nervous necrosis viral disease Control Technology level are more weak, the fortification of bait not enough, cause it to produce by propagation in scale.

Summary of the invention

It is an object of the invention to provide a kind of simple, stable epinephelus akaara offspring seed cultivation method adapted with it for some problems (as schistostoma is little, opening is poor, and mortality rate is high) run in epinephelus akaara seed rearing process.

The present invention realizes by following technical scheme:

A kind of epinephelus akaara offspring seed cultivation method, its breeding method step includes: 1) select parent fish, and 2) artificial induced spawning, 3) cloth ovum, 4) regulation and control water quality, 5) change water, 6) throw something and feed；

1) picking parent fish: the wild epinephelus akaara that picking individual is relatively big, gonad development is better, vigor is stronger, cultivate through domestication, raun average length is more than 37cm, and milter average length is more than 39cm；

2) artificial induced spawning: oxytocic hormone selects HCG, and raun consumption is 500-1000IU/kg, and milter consumption is the 1/2 of raun consumption；

3) cloth ovum: cloth ovum density domination is after 40-50g/ cube of water body, cloth ovum, and nursery starts；Cultivate pool inner water and deeply control at 0.6-1m, salinity 30 ± 2, water temperature 22-28 DEG C, dissolved oxygen in water >=5mg/L, micro-inflation；

4) regulation and control water quality: before cloth ovum, first adds chlorella in pond, and regulating water colour is light green, is maintained to wheel animalcule of throwing something and feeding and terminates, and carrys out regulating water quality thereafter through adding EM bacterium in water body；Keeping the dissolved oxygen >=5mg/L in water body in whole seedling raising process, from newly hatched larvae to the 7 slight aerations of age in days, after 7 ages in days, prelarva is gradually increased aeration；

5) change water: before nursery, 14d is without sea water, and nursery 16d-29d changes water 30% every day, and 30-32d changes sea water 40% every day, and 33d-36d changes sea water 60% every day, and 36-40d changes sea water 90% every day, after 41d, adopt pipeline mode；Nursery 30d plays dirt bottom beginning sucking-off pond；

6) throw something and feed: prelarva 2 ages in days-prelarva 5 age in days is thrown something and fed Concha Ostreae germ cell；Prelarva 6 age in days-25 age in days early stage, based on wheel animalcule of throwing something and feeding, starts simultaneously at interpolation artemia and is increasingly turned to based on artemia；Prelarva 26 age in days-50 age in days early stage, based on artemia of throwing something and feeding, adds mixed feed and gradually based on mixed feed simultaneously.

The difference of the present invention and other seawater fish offspring seed cultivation methods and having the beneficial effect that:

1, the technical scheme is that after validation trial, the development characteristics according to epinephelus akaara larvae juvenile fish Feeding organ, and work up Concha Ostreae germ cell of throwing something and feeding, wheel animalcule, artemia, mixed bait series.

2, from starting before cloth ovum to prelarva 7 age in days, inject a certain amount of bead algae solution every day and regulate water colour, except the effect with protection prelarva, it is also possible to as the bait of wheel animalcule.

3, the present invention adopts input EM bacterium in pond to improve water quality, it is possible to the effective ammonia nitrogen controlled in water and nitrite, it is ensured that stablizing of water quality.

4, the present invention is by starting to tame artifical compound feed from the prelarva later stage, biological feed of reasonably arranging in pairs or groups, and can effectively reduce the death that in domestication Articial bait making process, fry is caused because of bait discomfort.

Detailed description of the invention

Principles of the invention is: imitating on the basis of Wild ecological environment, some physical and chemical factors does the suitable adjustment growth promoter more to adapt to larva and juvenile, it is achieved that large-scale cultivates epinephelus akaara seed.

Technology contents below in conjunction with Examples detail invention:

Epinephelus akaara offspring seed cultivation method, its breeding method step includes: 1) select parent fish, and 2) artificial induced spawning, 3) cloth ovum, 4) regulation and control water quality, 5) change water, 6) throw something and feed.

1) picking parent fish: the wild epinephelus akaara that picking individual is relatively big, gonad development is better, vigor is stronger, cultivate through domestication, raun average length is 37.25cm, and milter average length is 39.06cm；

2) artificial induced spawning: oxytocic hormone selects HCG, and raun dosage is 500-1000IU/kg, and milter dosage is the 1/2 of raun, adopts the disposable injection of muscle of back；

3) cloth ovum: money of being fertilized by epinephelus akaara is distributed in the cement pit of 24 squares, cloth ovum density domination is at 45g/ cube of water body；Cultivating pool inner water and deeply control at 1m, condition of water quality controls in salinity 30 ± 2, water temperature 22-28 DEG C, dissolved oxygen in water >=5mg/L, micro-inflation；

4) before regulation and control water quality cloth ovum, first adding bead algae solution in pond, adjustment water colour is light green, is maintained to wheel animalcule of throwing something and feeding and terminates, and hereafter irregularly throws in EM bacterium 6ml/ cubic meter.Keeping the dissolved oxygen >=5mg/L in water body in whole seedling raising process, from newly hatched larvae to the 7 slight aerations of age in days, after 7 ages in days, prelarva is gradually increased aeration；

5) change water: before nursery, 14d is without sea water, and nursery 16d-29d changes water 30% every day, and 30-32d changes sea water 40% every day, and 33d-36d changes sea water 60% every day, and 36-40d changes sea water 90% every day, after 41d, adopt pipeline mode.

6) throw something and feed: prelarva 2 ages in days-prelarva 5 age in days is thrown something and fed Concha Ostreae germ cell；Prelarva 6 age in days-25 age in days early stage, based on wheel animalcule of throwing something and feeding, starts simultaneously at interpolation artemia and is increasingly turned to based on artemia, and described wheel animalcule is strengthened through chlorella and fish oil；Prelarva 26 age in days-50 age in days early stage, based on artemia of throwing something and feeding, adds mixed feed and gradually based on mixed feed simultaneously, and described artemia is strengthened through fish oil.Nursery 30d plays dirt bottom beginning sucking-off pond.

Cultivated through 68 days, bring out more than 210,000 tail epinephelus akaara seedling, the long 3.8-7.6cm of average body, incubation rate 17.5% altogether.

Claims (1)

1. an epinephelus akaara offspring seed cultivation method, it is characterised in that its breeding method step includes: 1) select parent fish, 2) artificial induced spawning, 3) cloth ovum, 4) regulation and control water quality, 5) change water, 6) throw something and feed；

1) picking parent fish: the wild epinephelus akaara that picking individual is relatively big, gonad development is better, vigor is stronger, cultivate through domestication, raun average length is more than 37cm, and milter average length is more than 39cm；

2) artificial induced spawning: oxytocic hormone selects HCG, and raun consumption is 500-1000IU/kg, and milter consumption is the 1/2 of raun consumption；

3) cloth ovum: cloth ovum density domination is after 40-50g/ cube of water body, cloth ovum, and nursery starts；Cultivate pool inner water and deeply control at 0.6-1m, salinity 30 ± 2, water temperature 22-28 DEG C, dissolved oxygen in water >=5mg/L, micro-inflation；

4) regulation and control water quality: before cloth ovum, first adds appropriate chlorella in pond, and regulating water colour is light green, is maintained to wheel animalcule of throwing something and feeding and terminates, and carrys out regulating water quality thereafter through adding EM bacterium in water body；Keeping the dissolved oxygen >=5mg/L in water body in whole seedling raising process, from newly hatched larvae to the 7 slight aerations of age in days, after 7 ages in days, prelarva is gradually increased aeration；

5) change water: before nursery, 14d is without sea water, and nursery 16d-29d changes water 30% every day, and 30-32d changes sea water 40% every day, and 33d-36d changes sea water 60% every day, and 36-40d changes sea water 90% every day, after 41d, adopt pipeline mode；Nursery 30d plays dirt bottom beginning sucking-off pond；

6) throw something and feed: prelarva 2 ages in days-prelarva 5 age in days is thrown something and fed Concha Ostreae germ cell；Prelarva 6 age in days-25 age in days early stage, based on wheel animalcule of throwing something and feeding, starts simultaneously at interpolation artemia and is increasingly turned to based on artemia；Prelarva 26 age in days-50 age in days early stage, based on artemia of throwing something and feeding, adds mixed feed and gradually based on mixed feed simultaneously.