CN102511427A - Desalting method for scylla paramamosian offspring seeds - Google Patents
Desalting method for scylla paramamosian offspring seeds Download PDFInfo
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- CN102511427A CN102511427A CN2012100022707A CN201210002270A CN102511427A CN 102511427 A CN102511427 A CN 102511427A CN 2012100022707 A CN2012100022707 A CN 2012100022707A CN 201210002270 A CN201210002270 A CN 201210002270A CN 102511427 A CN102511427 A CN 102511427A
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- salinity
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- sudden change
- scylla
- 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
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Abstract
The invention provides a desalting method for scylla paramamosian offspring seeds and relates to a blue crab culture method. The invention provides the desalting method for the scylla paramamosian offspring seeds, which has the advantages that the applicability of the blue crab offspring seeds to a low-salinity culture region can be enhanced, the culture survival rate is improved, the operation is simple, and the popularization and the application are easy. According to the invention, the megalopa is selected, the megalopa is subjected to the sudden salinity change, and the megalopa can successfully adapt to the 0.4 percent to 1 percent low-salinity environment when the megalopa is cultured to the first-stage son crabs through one-time or two-time sudden salinity change. In the desalting process, the survival rate of the offspring seeds is not influenced, the operation is simple and easy, and the popularization and the application are easy.
Description
Technical field
The present invention relates to the cultural method of mud crab, especially relate to the desalination method of a kind of Scylla paramamosain seed.
Background technology
Scylla paramamosain (Scylla paramamosain) is the main mariculture crab class of each province, China south.In recent years, blue crab cultivation is flourish, and the cultured area of China reaches 3.1 ten thousand hectares, and annual production is 11.6 ten thousand tons (Chinese fisheries statistics yearbook, 2010), has developed into the important mariculture industry of China.Blue crab cultivation promotes regional mariculture structural adjustment to enriching China's mariculture kind, and improving breeding environment ecological condition etc. all has bigger meaning.
Research shows that Scylla paramamosain embryonic development and 2 stages of zoea growth in the history of life need higher seawater salinity (27 ‰～30 ‰), and abnormal the growth for beginning migration to Hekou District behind the megalops larva and in low salinity degree of saltiness waters perched.At present, the Scylla paramamosain mass artificial is cultivated technology and is succeedd, and has effectively promoted the development of industry.But there is a problem in the Scylla paramamosain aquaculture industry: seed rearing carries out in high salinity area (salinity is more than 27 ‰), and form process mainly in the river mouth low salinity area (10 ‰) carry out.If the artificial seed spends without less salt and crosses (seedling desalination cultivation), just be difficult to adapt to low salinity environment, cause survival rate low, have a strong impact on culture benefit.Therefore, the artificial seed who needs badly high salinity hangs down the salinity adaptation, cultivates the desalination seed, to satisfy the needs in vast low salinity blue crab cultivation district.
In the culture of Chinese mitten crab process, megalops larva is widely accepted to juvenile crab and puts in a suitable place to breed.But in the blue crab cultivation process, it is juvenile crab that the raiser does not accept blue crab megalops as yet, and the juvenile crab of putting in a suitable place to breed at present all is meant young crab, and with the first phase young crab be main.Therefore at the mud crab seedlings cultivating process, need provide a large amount of first phase son crabs of handling as seed (desalination seed) through desalination.Mud crab first phase son crab is by the megalops larva development by metamorphosis, and megalops larva is stronger to salinity adaptability, so the megalops larva stage (continuing 7 day time) is the key period of desalinating adaptation.Traditional mud crab seedlings desalination technology is normally desalinated young crab, rather than megalops larva is desalinated; Adopt the method for salinity gradual change, needed the salinity of continuous several times to descend and long adaptation time; And be to carry out at large-area cultivating pool, the desalination process wastes time and energy, not easy to operate (Zhou Xin, Xu Renyi, Wang Jinbo. a kind of seedling desalination of mud crab freshwater aquiculture and stocking method. Chinese invention patent: ZL 200810019584.1).Recently, Scylla paramamosain megalops larva salinity (cultivating salinity is 30 ‰～32 ‰) mutant test shows that through 1 salinity bust, the megalops larva of salinity 6.4 ‰ processed group is all dead in 24h; The survival rate of salinity 12.8 ‰, 19.2 ‰, 25.6 ‰ and 32.0 ‰ processed group megalops larvas does not have significant difference.When the first phase of larval development to the time, salinity 12.8 ‰ treatment group was significantly lower than the average incremental weight salinity 19.2 ‰, 25.6 ‰ and 32.0 ‰ treatment group (Qi Lei, Jiang Technology, GU Xiao-lian, Li Zhifei, Qiao Zhenguo. Salinity crab dip for the proposed temple Megalopa growth and Na
+ / K
+ -ATPase activity. marine fisheries , 2011,33 (2) :201-206).
Summary of the invention
The object of the invention aims to provide a kind of adaptability that strengthens mud crab seedlings to the low salinity stocking district, improve to culture survival rate, operate simple and easy, the desalination method of the Scylla paramamosain seed that is easy to apply.
The present invention includes following steps:
1) selects megalops larva;
2) megalops larva is carried out the salinity sudden change.
In step 1), said megalops larva can be the megalops larva of the 2nd～5 age in days.
In step 2) in, the concrete grammar of said salinity sudden change can be: the water body that will cultivate the pond filters, and adds fresh water again; The salinity in said cultivation pond can be 25 ‰～30 ‰; Said fresh water is the fresh water that meets the fishery standard; In the said salinity sudden change, the range of decrease of each salinity sudden change is no more than 15 ‰; The number of times of said salinity sudden change is preferably 1 time or 2 times; The minimum adaptation salinity of desalination seed after the said salinity sudden change can be 4 ‰～10 ‰.
The invention provides the quick desalination method of a kind of Scylla paramamosain seed,, when cultivating megalops larva to first phase son crab, can successfully adapt to 4 ‰～10 ‰ low-salt environment through 1～2 salinity sudden change.The present invention does not influence the survival rate of seed in the desalination process, operates simple and easyly, is easy to apply.
Embodiment
Embodiment 1
Select the megalops larva of the 2nd age in days to carry out the salinity sudden change, this moment, the cultivation salinity of megalops larva was 30 ‰.To cultivate the pond water body and filter 1/3, add the fresh water that meets the fishery standard then, salinity will be reduced to 20 ‰; After 3 days, will cultivate the pond water body and filter 1/2, add the fresh water that meets the fishery standard then, salinity will be dropped to 10 ‰.
Embodiment 2
Select the megalops larva of the 3rd age in days to carry out the salinity sudden change, this moment, the cultivation salinity of megalops larva was 30 ‰.To cultivate the pond water body and filter 1/3, add the fresh water that meets the fishery standard then, salinity will be reduced to 20 ‰; After 2 days, will cultivate the pond water body and filter 1/2, add the fresh water that meets the fishery standard then, salinity will be dropped to 8 ‰.
Embodiment 3
Select the megalopa stage of the 4th age in days to carry out the salinity sudden change, this moment, the cultivation salinity of megalops larva was 30 ‰, will cultivate the pond water body and filter 1/2, added the fresh water that meets the fishery standard then, and salinity is reduced to 15 ‰; After 2 days, will cultivate the pond water body and filter 2/3, add the fresh water that meets the fishery standard then, salinity will be dropped to 5 ‰.
Embodiment 4
Select the megalopa stage of the 4th age in days to carry out the salinity sudden change, this moment, the cultivation salinity of megalops larva was 25 ‰, will cultivate the pond water body and filter 1/2, added the fresh water that meets the fishery standard then, and salinity is reduced to 12 ‰; After 2 days, will cultivate the pond water body and filter 2/3, add the fresh water that meets the fishery standard then, salinity will be dropped to 4 ‰.
Embodiment 5
Select the megalopa stage of the 5th age in days to carry out the salinity sudden change, this moment, the cultivation salinity of megalops larva was 25 ‰, will cultivate the pond water body and filter 3/5, added the fresh water that meets the fishery standard then, and salinity is suddenlyd change to 10 ‰.
Embodiment 6
Select the megalopa stage of the 5th age in days to carry out the salinity sudden change, this moment, the cultivation salinity of megalops larva was 28 ‰, will cultivate the pond water body and filter 1/2, added the fresh water that meets the fishery standard then, and salinity is reduced to 15 ‰; To cultivate the pond water body on the 2nd day and filter 2/3, add the fresh water that meets the fishery standard then, salinity will be dropped to 5 ‰.
Claims (8)
1. the desalination method of Scylla paramamosain seed is characterized in that may further comprise the steps:
1) selects megalops larva;
2) megalops larva is carried out the salinity sudden change.
2. the desalination method of Scylla paramamosain seed as claimed in claim 1 is characterized in that in step 1), and said megalops larva is the megalops larva of the 2nd～5 age in days.
3. the desalination method of Scylla paramamosain seed as claimed in claim 1 is characterized in that in step 2) in, the concrete grammar of said salinity sudden change is: the water body that will cultivate the pond filters, and adds fresh water again.
4. the desalination method of Scylla paramamosain seed as claimed in claim 1 is characterized in that in step 2) in, the salinity in said cultivation pond is 25 ‰～30 ‰.
5. the desalination method of Scylla paramamosain seed as claimed in claim 1 is characterized in that in step 2) in, said fresh water is the fresh water that meets the fishery standard.
6. the desalination method of Scylla paramamosain seed as claimed in claim 1 is characterized in that in step 2) in, in the said salinity sudden change, the range of decrease of each salinity sudden change is no more than 15 ‰.
7. the desalination method of Scylla paramamosain seed as claimed in claim 1 is characterized in that in step 2) in, the number of times of said salinity sudden change is 1 time or 2 times.
8. the desalination method of Scylla paramamosain seed as claimed in claim 1 is characterized in that in step 2) in, the minimum adaptation salinity of the desalination seed after the said salinity sudden change is 4 ‰～10 ‰.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100022707A CN102511427A (en) | 2012-01-05 | 2012-01-05 | Desalting method for scylla paramamosian offspring seeds |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100022707A CN102511427A (en) | 2012-01-05 | 2012-01-05 | Desalting method for scylla paramamosian offspring seeds |
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| CN102511427A true CN102511427A (en) | 2012-06-27 |
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| CN2012100022707A Pending CN102511427A (en) | 2012-01-05 | 2012-01-05 | Desalting method for scylla paramamosian offspring seeds |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884995A (en) * | 2012-09-21 | 2013-01-23 | 中国水产科学研究院东海水产研究所 | Desalination cultivation method for green mud crab early larvae |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1586184A (en) * | 2004-07-16 | 2005-03-02 | 冯志江 | Cultivating method for soft shell freshwater crab |
| CN1961658A (en) * | 2006-11-28 | 2007-05-16 | 厦门大学 | Blue crab fried desalting breeding method |
| CN101040607A (en) * | 2007-04-13 | 2007-09-26 | 厦门大学 | Desalted breeding method of larval crab |
| CN101218901A (en) * | 2008-01-22 | 2008-07-16 | 中国水产科学研究院淡水渔业研究中心 | Seedling desalinating and stocking method for fresh water aquiculture of mud crab |
| CN101695292A (en) * | 2009-11-02 | 2010-04-21 | 浙江旗海海产品专业合作社 | Net-cage intermediate cultivation method for young green mud crabs |
-
2012
- 2012-01-05 CN CN2012100022707A patent/CN102511427A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1586184A (en) * | 2004-07-16 | 2005-03-02 | 冯志江 | Cultivating method for soft shell freshwater crab |
| CN1961658A (en) * | 2006-11-28 | 2007-05-16 | 厦门大学 | Blue crab fried desalting breeding method |
| CN101040607A (en) * | 2007-04-13 | 2007-09-26 | 厦门大学 | Desalted breeding method of larval crab |
| CN101218901A (en) * | 2008-01-22 | 2008-07-16 | 中国水产科学研究院淡水渔业研究中心 | Seedling desalinating and stocking method for fresh water aquiculture of mud crab |
| CN101695292A (en) * | 2009-11-02 | 2010-04-21 | 浙江旗海海产品专业合作社 | Net-cage intermediate cultivation method for young green mud crabs |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884995A (en) * | 2012-09-21 | 2013-01-23 | 中国水产科学研究院东海水产研究所 | Desalination cultivation method for green mud crab early larvae |
| 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 |
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Application publication date: 20120627 |