CN101233831A - Paralichthys lethostigma seedling seed desalination method - Google Patents
Paralichthys lethostigma seedling seed desalination method Download PDFInfo
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- CN101233831A CN101233831A CNA2008100523530A CN200810052353A CN101233831A CN 101233831 A CN101233831 A CN 101233831A CN A2008100523530 A CNA2008100523530 A CN A2008100523530A CN 200810052353 A CN200810052353 A CN 200810052353A CN 101233831 A CN101233831 A CN 101233831A
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- desalination
- paralichthys
- fingerlings
- days
- lethostigma
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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 relates to a method for desalinating paralichthys lethostigma fingerlings. The method is characterized by comprising the following specific steps: paralichthys lethostigma fingerlings with age of 66 days and whole length of 18.8mm+/-3.5mm are chosen; salinity change gradient of 12 hours is adopted as 30, 10, 4 and 2; desalination is carried out for 36 hours step by step and the fingerlings are stood for 48 hours after target salinity is reached. Through desalination research on fingerlings with various specifications, the invention summarizes the complete and scientific method for desalinating the paralichthys lethostigma fingerlings and finds out the minimum age in days and proper range of salinity change gradient for paralichthys lethostigma desalination, thus laying a technical foundation for expanding the range of fingerling specifications and reducing fingerling cost for desalination cultivation of paralichthys lethostigma; compared with the existing minimum age of 90 days for fingerling desalination of paralichthys c, the invention brings 24 days forward and the desalination survival ratio reaches 100 percent. The method for desalinating the fingerlings of paralichthys lethostigma of the invention is reasonable and scientific, easy in application and operation, and is remarkable in effect.
Description
Technical field
The present invention relates to a kind of method of ocean fish seedling desalination, particularly a kind of paralichthys lethostigma seedling seed desalination method.
Background technology
At present, in order to guarantee the survival rate of Paralichthys lethostigma fry rearing, the minimum gauge of selecting paralichthys lethostigma seedling seed desalination usually is 90 orders more than age, exists desalination cycle problems such as length, desalinating cost height.
Summary of the invention
The objective of the invention is to overcome the weak point in the above-mentioned technology, a kind of scientific and reasonable, obvious results paralichthys lethostigma seedling seed desalination method is provided.
Implementation of the present invention is as follows for achieving the above object: the paralichthys lethostigma seedling seed of selecting 66 ages in days, total length 18.8mm ± 3.5mm for use, the salinity variable gradient that adopted 12 hours is: 30 → 10 → 4 → 2, incremental desalination 36 hours stopped 48 hours after the arrival target salinity.
The invention has the beneficial effects as follows: by the different size seedling desalination is studied, sum up the paralichthys lethostigma seedling seed desalination method of more complete science, explore the minimum gauge and the suitable salinity gradient excursion of Paralichthys lethostigma desalination, for the Paralichthys lethostigma desalination cultivation is expanded the seed size scope, reduction seed cost has been established technical foundation; The paralichthys lethostigma seedling seed desalination that quite existing minimum age in days is 90 ages in days 24 days in advance, the desalination cycle shortens, and the desalination survival rate reaches 100%.The inventive method is scientific and reasonable, use simple and easy to operate, the effect highly significant.
Description of drawings
Fig. 1 is that all size seedling desalination survives relatively schematic diagram of effect.
Embodiment
Below in conjunction with embodiment, to details are as follows according to embodiment provided by the invention:
((average total length 15.6mm ± 2.5mm) and 66 order ages, (paralichthys lethostigma seedling seed of average total length 18.8mm ± 3.5mm) was as the experiment fish for average total length 12.4mm ± 2mm), 56 ages in days to select for use age in days to be respectively 36 ages in days, each age in days group adopts A, B, four kinds of method desalinations of C, D respectively, and 12 hours salinity variable gradient of each method is respectively:
A、30→16→8→4→2；
B、30→10→4→2；
C、30→15→2；
D、30→2；
Incremental desalinating.
The test water tank is the plastic cistern of 20cm * 40cm, and each water tank is put 20 tail seeds.Every group establish 3 parallel, wherein the control group salinity is constant.Stop 48 hours with observing effect after every group of arrival target salinity.As shown in Figure 1, the desalination survival rate of four kinds of methods of 36 age in days seeds is all very low, and wherein the survival rate of D method is minimum, is 0.The survival rate of four kinds of desalination methods of 66 ages in days is all the highest, and wherein the desalination survival rate of A, B and three kinds of methods of C has all reached 100%.56 age in days seedling desalination survival rates are between above-mentioned two kinds of specifications.In A, B, C and four kinds of methods of D, two kinds of methods of A and B obviously are better than C and D method in addition, but A and B method desalination result do not have significant difference (P＞0.05), and the B method needs the time short, operates more simple and easy to do; Therefore, the minimum of paralichthys lethostigma seedling seed desalination age in days is 66 ages in days, and suitable salinity variable gradient was 30 → 10 → 4 → 2 in 12 hours, and incremental desalinating 36 hours stopped 48 hours after the arrival target salinity.
Above-mentioned detailed description of this paralichthys lethostigma seedling seed desalination method being carried out with reference to embodiment; be illustrative rather than determinate; can list several embodiment according to institute's limited range; therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.
Claims (1)
1, a kind of paralichthys lethostigma seedling seed desalination method, it is characterized in that concrete implementation step is as follows: selecting 66 ages in days, total length for use is the paralichthys lethostigma seedling seed of 18.8mm ± 3.5mm, the salinity variable gradient that adopted 12 hours is: 30 → 10 → 4 → 2, incremental desalination 36 hours stopped 48 hours after the arrival target salinity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100523530A CN101233831A (en) | 2008-02-29 | 2008-02-29 | Paralichthys lethostigma seedling seed desalination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100523530A CN101233831A (en) | 2008-02-29 | 2008-02-29 | Paralichthys lethostigma seedling seed desalination method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101233831A true CN101233831A (en) | 2008-08-06 |
Family
ID=39917935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100523530A Pending CN101233831A (en) | 2008-02-29 | 2008-02-29 | Paralichthys lethostigma seedling seed desalination method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101233831A (en) |
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2008
- 2008-02-29 CN CNA2008100523530A patent/CN101233831A/en active Pending
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080806 |