CN102884995A - Desalination cultivation method for green mud crab early larvae - Google Patents
Desalination cultivation method for green mud crab early larvae Download PDFInfo
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- CN102884995A CN102884995A CN201210361523XA CN201210361523A CN102884995A CN 102884995 A CN102884995 A CN 102884995A CN 201210361523X A CN201210361523X A CN 201210361523XA CN 201210361523 A CN201210361523 A CN 201210361523A CN 102884995 A CN102884995 A CN 102884995A
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- scylla paramamosain
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- 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
Abstract
The invention relates to a desalination cultivation method for green mud crab early larvae. The desalination cultivation method comprises the following steps: green mud crab megalopa is cultivated in a larval rearing pond, the salinity of the pond water in the larval rearing pond is 2.7-3.5 percent, and the larval rear pond is subjected to continuously inflation; the pond water is charged twice a day, and bait is fed to the larval rearing pond; the larval rearing pond is subjected to desalination treatment from the second day of the megalopa stage, fresh water is injected to the larval rearing pond to keep the salinity of the pond water in the range of 0.1-0.1.5 percent, after the desalination cultivation is continuously carried out for 12-14 days, and the larva grows to the larval crab III stage, and is adaptive to low-salinity seawater with the salinity of 0.7-1.5 percent. According to the desalination cultivation method, the green mud crab early larvae are subjected to desalination cultivation by gradually reducing the sweater salinity of the larval rearing pond, and the situation that larvae die due to rapid change of osmotic pressure after the larvae are directly put in low-salinity sweater is avoided; and the desalination cultivation method has the advantages that the method is scientific and reasonable, simple and feasible, and the larvae survival rate is high.
Description
Technical field
The invention belongs to the breeding method field of Scylla paramamosain, particularly the early stage young desalting breeding method of a kind of Scylla paramamosain.
Background technology
Scylla paramamosain (Scylla paramamosain) belongs to Arthropoda (Arthropoda), Crustachia (Crustacea), Decapoda (Decapoda), Portumidae (Portunidae), mud crab genus (Scylla), China mainly be distributed in the entrance of Changjiang River and on the south coastal marine site, be the important marine fishery resources of China and mariculture crab class.
Scylla paramamosain has the advantages such as build is large, growth is fast, meat flavour is delicious, favored by consumers in general.China's Scylla paramamosain cultivation mainly is distributed in the southeastern coast zone, has formed larger cultivation scale.In recent years, the cultivation annual production of China's Scylla paramamosain is stabilized in more than 100,000 tons always, has kept stable growth momentum.Although Scylla paramamosain is a kind of eurysalinity sea crabs class, its most suitable growth salinity range is 18 ~ 35 ‰.Under the natural conditions, the female crab of mating lays eggs in open sea regions breeding, the young when constantly growing gradually to the greater coasting area migration, this also be one by the process of high salinity to the Low-salinity transition.Because the artificial seed cultivates to form under the high salinity condition, can directly be invested in the pond of high salinity and cultivate, but can not cultivate in the Low-salinities such as mouth of the river zone.Therefore, be necessary to set up a kind of effectively, the seedling desalination breeding method of simple possible, cultivation can adapt to the high-quality seed of Low-salinity seawater, is conducive to enlarge the Scylla paramamosain culturing area, promotes the development of industry.
Summary of the invention
Technical problem to be solved by this invention provides the early stage young desalting breeding method of a kind of Scylla paramamosain, and operation is simple for the method, scientific and reasonable, and weed survival rate is high.
The early stage young desalting breeding method of a kind of Scylla paramamosain of the present invention comprises:
Put the Scylla paramamosain megalops larva in the seed rearing pond in a suitable place to breed, the salinity of Chi Shui is 27-35 ‰ in the seed rearing pond, continuous charge; Change water every day 2 times, an amount of bait of throwing something and feeding simultaneously; Begin to desalinate processing from megalops larva stage second day, inject an amount of fresh water to keep pond salinity water reduction every day scope between 1 ~ 1.5 ‰, through 12 ~ 14 days continuous desalination cultivation, seed grew to young crab III stage phase, can adapt to salinity at the Low-salinity seawater of 7-15 ‰.
The specification in described seed rearing pond is: area is at 10 ~ 25m
2Between, the degree of depth is between 1.0 ~ 1.5m.
The density of putting the Scylla paramamosain megalops larva in the described seed rearing pond in a suitable place to breed is 3000 ~ 7000/cubic metre water bodys.
Described inflation method is: average every square metre arranges a gas head, and inflation is boiling shape, continuous charge.
The described water method of changing is: change water in morning every day and afternoon, quantity of exchanged water is 1/3 of cumulative volume.
Described bait feeding method is: the megalops larva stage is aided with the razor clam meat gruel of hanging take halogen worm adult as main; Young crab I-III stage phase is take the razor clam meat gruel of hanging as main.
The present invention carries out desalination cultivation by progressively reducing the method for cultivating the pond seawater salinity to the early stage young of Scylla paramamosain, can avoid seed directly to render in the Low-salinity seawater and cause death because osmotic pressure changes fast.
The present invention compared with prior art has following advantage and good effect:
The present invention comes into effect progressively desalination cultivation from the Scylla paramamosain megalops larva stage, this, young had certain adaptive capacity to salinity in period, through 12 ~ 14 days cultivation, paedomorphosis was young crab III stage phase, can directly render in the Low-salinity seawater to cultivate.
Beneficial effect:
Adopt method of the present invention to cultivate the desalination seed, it is reasonable, simple to have a methodological science, the weed survival rate advantages of higher.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used for explanation the present invention and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
Select indoor half a buried cement pit as cultivating the pond, length is respectively 5m, 3m, 1.5m, and it is dark to 90cm to add seawater (about salinity 30 ‰).15 gas heads are set, continuous charge, aeration quantity is adjusted to the water surface and is the boiling shape.Throw in the Scylla paramamosain megalops larva, density is controlled at 5000/cube water bodys.Change water in morning every day and afternoon, quantity of exchanged water is 1/3 of cumulative volume.After changing water, the bait of throwing something and feeding, the megalops larva stage is aided with the razor clam meat gruel of hanging take halogen worm adult as main, and the young crab stage is take the razor clam meat gruel of hanging as main.From the second day in megalops larva stage, carry out seedling desalination and cultivate.Inject an amount of fresh water, keep pond salinity water reduction every day scope between 1 ~ 1.5 ‰.Through 12 ~ 14 days continuous desalination cultivation, seed grew to young crab III stage phase, can adapt to salinity at the Low-salinity seawater more than 7 ‰.
Claims (6)
1. early stage young desalting breeding method of Scylla paramamosain comprises:
Put the Scylla paramamosain megalops larva in the seed rearing pond in a suitable place to breed, the salinity of Chi Shui is 27 ~ 35 ‰ in the seed rearing pond, continuous charge; Change water every day 2 times, the bait of throwing something and feeding simultaneously; Begin to desalinate processing from megalops larva stage second day, inject fresh water to keep pond salinity water reduction every day scope between 1 ~ 1.5 ‰, through 12 ~ 14 days continuous desalination cultivation, seed grew to young crab III stage phase, can adapt to salinity at the Low-salinity seawater of 7-15 ‰.
2. the early stage young desalting breeding method of a kind of Scylla paramamosain according to claim 1, it is characterized in that: the specification in described seed rearing pond is: area is at 10 ~ 25m
2Between, the degree of depth is between 1.0 ~ 1.5m.
3. the early stage young desalting breeding method of a kind of Scylla paramamosain according to claim 1, it is characterized in that: the density of putting the Scylla paramamosain megalops larva in the described seed rearing pond in a suitable place to breed is 3000 ~ 7000/cubic metre water bodys.
4. the early stage young desalting breeding method of a kind of Scylla paramamosain according to claim 1, it is characterized in that: the concrete grammar of described inflation is: average every square metre arranges a gas head, and inflation is boiling shape, continuous charge.
5. the early stage young desalting breeding method of a kind of Scylla paramamosain according to claim 1, it is characterized in that: the described concrete grammar that changes water is: change water in morning every day and afternoon, quantity of exchanged water is 1/3 of cumulative volume.
6. the early stage young desalting breeding method of a kind of Scylla paramamosain according to claim 1, it is characterized in that: described bait feeding method is: the megalops larva stage is aided with the razor clam meat gruel of hanging take halogen worm adult as main; Young crab I-III stage phase is take the razor clam meat gruel of hanging as main.
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| CN201210361523XA CN102884995A (en) | 2012-09-21 | 2012-09-21 | Desalination cultivation method for green mud crab early larvae |
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| CN201210361523XA CN102884995A (en) | 2012-09-21 | 2012-09-21 | Desalination cultivation method for green mud crab early larvae |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105028271A (en) * | 2015-06-30 | 2015-11-11 | 博湖县齐众生态水产养殖有限责任公司 | Cultivating technology of Eriocheir sinensis megalopas in inland freshwater lake |
| CN108124803A (en) * | 2017-12-25 | 2018-06-08 | 中国科学院东北地理与农业生态研究所 | A kind of method of III phase of salt marshes underground brackish water biological breeding son crab |
| CN110463638A (en) * | 2019-09-11 | 2019-11-19 | 宁波大学 | A method of effectively improving Scylla paramamosain juvenile crab desalination survival rate |
| CN113785789A (en) * | 2021-10-14 | 2021-12-14 | 中国水产科学研究院南海水产研究所 | Blue crab cultivation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105028271A (en) * | 2015-06-30 | 2015-11-11 | 博湖县齐众生态水产养殖有限责任公司 | Cultivating technology of Eriocheir sinensis megalopas in inland freshwater lake |
| CN108124803A (en) * | 2017-12-25 | 2018-06-08 | 中国科学院东北地理与农业生态研究所 | A kind of method of III phase of salt marshes underground brackish water biological breeding son crab |
| CN108124803B (en) * | 2017-12-25 | 2020-04-03 | 中国科学院东北地理与农业生态研究所 | Method for ecologically cultivating juvenile crabs in stage III by using underground brackish water in salt marsh wetland |
| CN110463638A (en) * | 2019-09-11 | 2019-11-19 | 宁波大学 | A method of effectively improving Scylla paramamosain juvenile crab desalination survival rate |
| CN113785789A (en) * | 2021-10-14 | 2021-12-14 | 中国水产科学研究院南海水产研究所 | Blue crab cultivation method |
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Application publication date: 20130123 |