CN101167442B

CN101167442B - Pomfret fingerlings artificial culturing method

Info

Publication number: CN101167442B
Application number: CN200610117633A
Authority: CN
Inventors: 施兆鸿; 王建钢; 罗海忠
Original assignee: East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Current assignee: East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Priority date: 2006-10-27
Filing date: 2006-10-27
Publication date: 2010-05-12
Anticipated expiration: 2026-10-27
Also published as: CN101167442A

Abstract

An artificial cultivation method for dollar-fish fry relates to the cultivation of dollar-fish fry and solves the problem of cultivating dollar-fish fry. The invention adopts a growing pool to cultivate dollar-fish fry and controls the salineness of growing water, water temperature, light lamination, water flow, dissolved oxygen, aeration quantity and water exchanging quantity, and feed for dollar-fish fry is provided. The invention is characterized in that the density of dollar-fish fry is 15 to 20 thousand fry per stere, water and fry are together put into the pool in the process of puttingfry into the pool, the water level of the pool is kept to be 1.3 meters, fifty percent of water is changed when fry are six to 25 days old, and after fry are 26 days old, water is changed in the morning and in the afternoon every day, the salineness of water in the pool is 28-34 millesimal, water temperature is 18-24 DEG C, light lamination on the surface of water is 500-2000lx, dissolved oxygen in water is above 5ppm and complexon is charged into water according to 5ppm, when fry are 1.5cm long, fry are put into different pools and fry and water are ladled together to different pools, after fry are put into different pools, the density of fry is 3000-5000 fry per stere, and pools are provided with water flow guide runners. The invention is applied in cultivation of dollar-fish fry.

Description

Pomfret fingerlings artificial culturing method

Technical field:

The present invention relates to the silvery pomfret newly hatched larvae and under the artificial environmental condition of setting, cultivate the grow up method of the juvenile fish more than 2cm of fork.

Background technology

Silvery pomfret is widely distributed pelagic fishes, and growth just can reach commercial specification rapidly then in natural waters, has very high economic worth.Silvery pomfret has bright development prospect as the new varieties of culturing.It is the key issue that the development silvery pomfret is propagated artificially that pomfret fingerlings is cultivated.Difficulty is big because silvery pomfret is grown seedlings, and does not also have the example of artificial breeding in equal other butterfish that belong to together, and therefore, the silvery pomfret artificial seed cultivates still new problem that needs are explored.

Summary of the invention

The problem that the present invention need solve provides a kind of pomfret fingerlings artificial culturing method.

Technical scheme of the present invention adopts nursery pond to grow seedlings, and controls salinity, water temperature, illumination, current, dissolved oxygen, aeration quantity, the quantity of exchanged water of the water of growing seedlings, and is equipped with silvery pomfret larvae juvenile fish bait series, it is characterized in that nursery pond 15 is to 36m ³, place filtering sea in the pond to the 1m water level, putting seedling density is 1.5 to 20,000 tail newly hatched larvae/m ³, connect the water hairtail when putting seedling and from hatching pail, move into nursery pond together; Growing seedlings adds fresh seawater 10cm or change 20 to 30cm water preceding 5 day every day, keeps water level at 1.3 meters; 6 age in days to 25 ages in days change water 50%, 26 age in days every day to be finished morning and afternoon every day to growing seedlings and respectively changes once day quantity of exchanged water 100 to 140%; The pond salinity water is controlled at little inflation in 28-34 ‰, water temperature 18-24 ℃, surface layer of water illumination 500-2000lx, water, pneumatic head density is 0.4-0.6/m ², dissolved oxygen is greater than 5ppm, throw in ethylenediamine tetra-acetic acid-sodium by 5ppm in water; Wheel animalcule 15 to the 20/ml of density that throws something and feeds, halogen worm 3 to the 7/ml of density that throws something and feeds, copepoda 1 to the 3/ml of density that throws something and feeds, micro-capsule mixed bait 3 hours once, joining bait density in the control water when throwing something and feeding is 5-10 grain/ml, and fish meat emulsion is thrown something and fed 2-4 time every day, and back 1 hour not surplus residual bait is as the criterion to throw something and feed; The fry total length reaches 1.5cm time-division pond, and the operation of branch pond will connect seedling band water ladles out together, divides fry density 3000-5000 tail/m behind the pond ³, and in the pond, add the current deflecting plate; Newly hatched larvae 3 ages in days play soil pick-up every other day, and 20 ages in days play soil pick-up every day.

This method is cultivated 7.1 ten thousand tail pomfret parrs through 40-50 days seedling growth tests, and the bodily form is normal, stalwartness is active, it is positive to ingest, and the average total length of silvery pomfret seedling reaches 4.1cm.

Embodiment

The present invention is according to ecological habit and the physiological property of silvery pomfret, adopt indoor cement pit to grow seedlings or factorial seedling growth, by control grow seedlings salinity, water temperature, illumination, current, dissolved oxygen, aeration quantity, the quantity of exchanged water of water, be equipped with silvery pomfret larvae juvenile fish bait series, with the silvery pomfret newly hatched larvae under the artificial environmental condition of setting, cultivated through 40-50 days, reach and pitch the juvenile fish that grows up more than 2cm; Specific implementation method is:

Nursery pond 15-36m ³, filtering sea is placed 1m water level in the pond, and it is 0.4-0.6/m greater than 5ppm, little inflation, pneumatic head density that environmental condition is controlled at salinity 28-34 ‰, water temperature 18-24 ℃, surface layer of water illumination 500-2000lx, oxygen in water ², in water, throw in EDTA-Na by 5ppm ⁺

Putting seedling density is 1.5-2 ten thousand tail newly hatched larvae/m ³, the company of need water hairtail ladles out together in the immigration nursery pond from hatching pail, can not drag for net;

Growing seedlings adds fresh seawater 10cm (water level height) or change 20-30cm water preceding 5 day every day, keeps water level at 1.3 meters; 6 ages in days-25 age in days changes water 50%, 26 age in days-grow seedlings every day to be finished morning and afternoon every day and respectively changes once day quantity of exchanged water 100-140%;

Silvery pomfret larvae juvenile fish bait series: wheel animalcule-halogen worm-halogen worm-micro-capsule mixed bait-copepoda-fish meat emulsion; The wheel animalcule density 15-20/ml that throws something and feeds, the halogen worm density 3-7/ml that throws something and feeds, the copepoda density 1-3/ml that throws something and feeds, micro-capsule mixed bait 3 hours once, joining bait density in the control water when throwing something and feeding is 5-10 grain/ml, and domestication makes the young juvenile fish of silvery pomfret concentrate grazing rate to reach more than 80% gradually, and fish meat emulsion is thrown something and fed 2-4 time every day, and back 1 hour not surplus residual bait is as the criterion to throw something and feed;

Newly hatched larvae 3 ages in days play soil pick-up every other day, and 20 ages in days play soil pick-up every day;

When silvery pomfret fry total length reaches 1.5cm and time-division pond, the operation of branch pond will connect seedling band water and ladle out together, silvery pomfret is the brachymystax lenok class, young young stage fish scale is easy to come off, caused that scale wiped in case drag for netting gear, and then be easy to death, the branch pond is turned over the pond and must be connected the water hairtail and operate together, even can not dried uply operate behind the young stage, divide cultivation fry density 3000-5000 tail/m behind the pond ³, and in the pond, add the current deflecting plate to strengthen current; Grow seedlings and to guarantee sufficient dissolved oxygen and certain discharge in the later stage water.

Claims

1. pomfret fingerlings artificial culturing method, the employing nursery pond is grown seedlings, control salinity, water temperature, illumination, current, dissolved oxygen, aeration quantity and the quantity of exchanged water of the water of growing seedlings, be equipped with silvery pomfret larvae juvenile fish bait series, it is characterized in that in the nursery pond placing filtering sea to the 1m water level, put seedling density and be 1.5 to 20,000 tails/m ³, connect the water hairtail when putting seedling and move into nursery pond; Growing seedlings adds fresh seawater 10cm or change 20 to 30cm water preceding 5 day every day, keeps water level at 1.3 meters; 6 age in days to 25 ages in days change water 50%, 26 age in days every day to be finished morning and afternoon every day to growing seedlings and respectively changes once day quantity of exchanged water 100% to 140%; Little inflation in pond salinity water 28-34 ‰, water temperature 18-24 ℃, surface layer of water illumination 500-2000lx, water, pneumatic head density are 0.4-0.6/m ², dissolved oxygen throws in ethylenediamine tetra-acetic acid-sodium greater than 5ppm with by 5ppm in water; Wheel animalcule 15 to the 20/ml of density that throws something and feeds, halogen worm 3 to the 7/ml of density that throws something and feeds, copepoda 1 to the 3/ml of density that throws something and feeds, micro-capsule mixed bait 3 hours once, joining bait density in the control water when throwing something and feeding is 5-10 grain/ml, and fish meat emulsion is thrown something and fed 2-4 time every day, and back 1 hour not surplus residual bait is as the criterion to throw something and feed; The fry total length reaches 1.5cm time-division pond, and the operation of branch pond will connect seedling band water ladles out together, divides fry density 3000-5000 tail/m behind the pond ³, and in the pond, add the current deflecting plate; Newly hatched larvae 3 ages in days play soil pick-up every other day, and 20 ages in days play soil pick-up every day.