CN101444194A - Method of river crab temperature control temporary rearing quality preservation technology - Google Patents
Method of river crab temperature control temporary rearing quality preservation technology Download PDFInfo
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- CN101444194A CN101444194A CNA2008102340430A CN200810234043A CN101444194A CN 101444194 A CN101444194 A CN 101444194A CN A2008102340430 A CNA2008102340430 A CN A2008102340430A CN 200810234043 A CN200810234043 A CN 200810234043A CN 101444194 A CN101444194 A CN 101444194A
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- temperature control
- river crab
- temporary rearing
- pond
- temporarily
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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
A method of river crab temperature control temporary rearing quality preservation technology belongs to the technical field of aquaculture, and aims to provide a river crab temperature control temporary rearing method which can restrain the gonadal development of river crab, preserve quality, reduce death and prolong market time. The technical key points of the method is that the hefty river crabs are placed in a temporary rearing chamber with the female separated form the male; the temporary rearing chamber is placed in a temperature control temporary rearing pond to carry out temperature control temporary rearing to the river crab; in the temperature control temporary rearing pond, the water temperature is controlled to be 7 to 10 DEG C, the pH value is 6.5 to 7.5, the content of the dissolved oxygen is more than 6 mg/L, the content of ammonia nitrogen (NH3-N)is controlled to be under 0.1 mg/L, and the content of nitrite (NO3-N) is lower than 0.1 mg/L. Through temperature control temporary rearing, the gonadal development of the river crab is restrained, the quality of the river crab is guaranteed, the death of the river crab is reduced, and the sale and market time of the river crab is prolonged by two to four months, thereby satisfying living need of people, achieving good social effect, and increasing sale income as well as the economical effect of enterprises.
Description
Technical field
The present invention relates to the method that a kind of river crab temperature control is supported temporarily, belong to technical field of aquaculture.
Background technology
River crab is commonly called as eriocheir sinensis, steamed crab.Formal name used at school China chela crab (Eriocheir Sinensis H.Milne-Edwards), English Chinese mitten handedcrab by name is the traditional aquatic products treasure of China.Its delicious flavour, nutritious.Among the people have saying of " river crab precedency hundred being lightly seasoned ".The domestic market is mainly in the East China.Along with the raising of living standards of the people, more and more higher to the quality requirements of river crab.Because river crab is the migration shell-fish, biological habit is special, grows up in fresh water, breeds in seawater, after annual late September, river crab progressively carries out for the last time " ripe shelling ", and sexual gland is reached maturity, and can begin breeding migration, sexual gland is further grown in migration, " crab oil " (river crab liver) also transforms in migration, and for gonad development provides nutriment, just stops breeding until light salt water intersection.The peak period of migration is before and after the Frost's Descent, and the breeding back is promptly dead.So, 22～24 months life-spans of participation migration river crab.Under the natural temperature condition, traditional season of edible river crab, generally in 8～September of the lunar calendar, custom had saying of " the yellow crab fertilizer of chrysanthemum ", " eating crab under the sweet osmanthus tree ".After the annual Spring Festival, with the rising of temperature, the listing number of river crab reduces, and quality descends.
Because the migration habit of river crab is the catching season of river crab in the 10～December in every year.Raiser and distributors concentrate river crab and fish for listing, the particularly river crab that catches from river crab production bases such as lake, rivers, catch output and concentrate, and are difficult in time sell and obtain price preferably, and the mode that often adopts the pond to support temporarily is beneficial to sell, general 667m
2The pond can be supported about river crab 500～1000kg temporarily, and density is approximately 0.75～1.5kg/m
2After the annual Spring Festival, along with temperature raises, the quickening of river crab gonad development, " crab oil " reduces hardening, the lethality increase that quality also descends to some extent and supports river crab temporarily.So river crab quantity falls sharply on the annual February market, more difficult have a high-quality river crab supply the market, is difficult to have the supply of high-quality river crab 4～June substantially, has the limitation that river crab can not balanced listing.
Summary of the invention
The objective of the invention is to the biological habit according to river crab, a kind of method of river crab temperature control temporary rearing quality preservation technology is provided, it can suppress its gonad development to fishing for the river crab of supporting temporarily the back, keep its quality, reduce its death, prolong the time of its listing, to satisfy the people's life requirement.
Its technical scheme is: a kind of river crab temperature control is supported temporarily the novel technique method of guaranteeing the quality, and comprises that pond normal temperature one-level is supported temporarily, temperature control secondary method for temporarily cultivating, it is characterized in that: the temperature control storage pond, holding pond is set, supports case and double-plastic heat preservation greenhouse temporarily; From one-level normal temperature storage pond, holding pond, select the river crab of physique stalwartness around the Spring Festival, separately place by female, hero and support temporarily in the case; Support case temporarily and place the temperature control storage pond, holding pond, river crab is carried out temperature control support temporarily; Water temperature in the temperature control storage pond, holding pond is controlled at 7～10 ℃, pH6.5～7.5, and more than the dissolved oxygen 6mg/L, ammonia nitrogen (NH
3-N) be controlled at below the 0.1mg/L nitrite (NO
2-N) below the 0.1mg/L.
Its technique effect is: according to the biological habit of river crab, river crab after fishing for is carried out the test that male and female branch mailbox temperature control is supported temporarily: 2007, river crab to the 50000kg that fishes for, be placed on earlier in the storage pond, holding pond of one-level normal temperature and support temporarily, after therefrom selecting the river crab of 23220kg to carry out the male and female branch mailbox around the Spring Festival, enter and carry out temperature control in the temperature control storage pond, holding pond and support temporarily, the gonad development that has suppressed river crab effectively, guaranteed the quality of river crab, reduced the death of river crab, make river crab sell listing time lengthening 2～4 months.To the first tenday period of a month in May, 2008 outright selling finish, wherein female crab survival rate can reach about 95%, male crab survival rate can reach 90%, product is sold to Shanghai, Zhejiang, Jiangsu, selling price obviously rises, average selling price has increased by 50 yuan/kg, and adding up to increases by 116.1 ten thousand yuan of incomes from sales, increases by 85.5 ten thousand yuan of profits.Both satisfy the people's life requirement, obtained good social benefit, increased the income from sales of enterprise again, improved economic benefit of enterprises.Therefore, the method that river crab temperature control of the present invention is supported temporarily is to suppress river crab gonad development, assurance river crab quality, the death of minimizing river crab, make river crab sell effective, the ripe method that Time To Market prolongs, and cost is low, and is effective, easy operating.
Embodiment
At the catching season of river crab, after the river crab of culturing caught or purchase, put into that the storage pond, holding pond pool carries out that normal temperature is supported temporarily and manage according to the technology of supporting temporarily of routine.
Temperature control is supported the time temporarily: around the Spring Festival, the press normal temperature temporarily foster river crab of breed in the storage pond, holding pond pool separated by female, male, and the river crab that the selection vigor is good is transferred to respectively in the temporarily foster case that sets in advance, then, place the temperature control storage pond, holding pond that sets in advance with supporting case temporarily, river crab is carried out temperature control support temporarily.
Support cage size temporarily: support the version that case can adopt net cage temporarily.The specification of net cage can be long 2m * wide 4m * high 1m, 3 * 2 polyethylene netting twines, mesh 2a=2.0cm.Every net cage can be supported the river crab of 130kg～140kg temporarily, and density is 16.25-17.5kg/m
2
The temperature control storage pond, holding pond: the specification of temperature control storage pond, holding pond can be long 92m * wide 8m * high 1.5m.At the bottom of the soil property, depth of water 1.2m.On join steel frame construction, double-plastic, the therebetween straw mat is provided with the sunshade net on the outer layer plastic film.It is 40 kilowatts one of refrigeration unit that per 2 temperature control storage pond, holding ponds are equipped with power, load area be 0.054 kilowatt //m
2Be equipped with power and be 3 kilowatts inflator pump, 0.0040 kilowatt of the load water surface //m
2Be equipped with 88～90 of Bubbled stones in the storage pond, holding pond or use nanotube.Can place 40～46 in above-mentioned temporarily foster net cage in each storage pond, holding pond, every pond temperature control is supported river crab 5000kg temporarily.
The control parameter of temperature control storage pond, holding pond: water temperature is controlled at 7～10 ℃, pH6.5～7.5, and more than the dissolved oxygen 6mg/L, ammonia nitrogen (NH
3-N) be controlled at below the 0.1mg/L nitrite (NO
2-N) below the 0.1mg/L.Changed water once in per about 7 days, and changed water 20～40cm at every turn, water temperature difference is controlled in 3 ℃.
The feed of throwing something and feeding: based on vegetal baits such as animal baits such as the spiral shell of throwing something and feeding, small fish and corn, pumpkin, pasture and water, feeding rate 2%～10%, according to the situation of ingesting of river crab with adjusting constantly, should adjust the ratio of animal and plant bait to the gonad development river crab different with the nutrient accumulation degree, to the relatively poor river crab of coefficient of condition based on the animal bait of throwing something and feeding, otherwise based on vegetal bait.
Points for attention:
1, the foster temporarily river crab of temperature control should be selected the river crab of supporting temporarily of 125 energetic, that four limbs are complete, physique is healthy and strong～250g in the normal temperature storage pond, holding pond pool, and avoids long-distance transport as far as possible, to improve survival rate.
It is fresh that the bait of 2, throwing something and feeding should keep, and in time remove the residual bait of eating after remaining, to avoid ruining water quality.
3, monitor the variation of water quality parameter every day, carry out record, pinpoint the problems and in time take measures to be solved.
4, gonad development, coefficient of condition and the different river crab of " crab oil " accumulation degree branch mailbox of should classifying is raised, and regulate the ratio of animal and plant bait.
5. water temperature difference is controlled in 3 ℃ when changing water, otherwise water inlet need be carried out preheating earlier.
Claims (3)
1, a kind of method of river crab temperature control temporary rearing quality preservation technology comprises the method that storage pond, holding pond pool normal temperature is supported temporarily, it is characterized in that: the temperature control storage pond, holding pond is set and supports case temporarily; With the river crab of physique stalwartness, separately place in the temporarily foster case by female, hero; Then, will support case temporarily and place the temperature control storage pond, holding pond, and river crab be carried out temperature control support temporarily; Water temperature in the temperature control storage pond, holding pond is controlled at 7～10 ℃, pH6.5～7.5, and more than the dissolved oxygen 6mg/L, ammonia nitrogen (NH
3-N) be controlled at below the 0.1mg/L nitrite (NO
2-N) below the 0.1mg/L.
2, a kind of method of river crab temperature control temporary rearing quality preservation technology according to claim 1 is characterized in that: described temporarily foster case is the cage structure form, and the specification of net cage is long 2m * wide 4m * high 1m, 3 * 2 polyethylene netting twines, mesh 2a=2.0cm.
3, a kind of method of river crab temperature control temporary rearing quality preservation technology according to claim 1 is characterized in that: at the bottom of described temperature control storage pond, holding pond is soil property, on join steel frame construction, double-plastic, the therebetween straw mat is provided with the sunshade net on the outer layer plastic film; Refrigeration machine, inflator pump and Bubbled stone be equipped with in the temperature control storage pond, holding pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102340430A CN101444194A (en) | 2008-11-01 | 2008-11-01 | Method of river crab temperature control temporary rearing quality preservation technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102340430A CN101444194A (en) | 2008-11-01 | 2008-11-01 | Method of river crab temperature control temporary rearing quality preservation technology |
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| Publication Number | Publication Date |
|---|---|
| CN101444194A true CN101444194A (en) | 2009-06-03 |
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ID=40740308
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008102340430A Pending CN101444194A (en) | 2008-11-01 | 2008-11-01 | Method of river crab temperature control temporary rearing quality preservation technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239819A (en) * | 2011-05-04 | 2011-11-16 | 苏州市相城区新时代特种水产养殖场 | Method for temporarily cultivating river crabs |
| CN102356759A (en) * | 2011-09-20 | 2012-02-22 | 宁波大学 | Three-dimensional pool cultivating method of portunus trituberculatus |
| CN105830974A (en) * | 2016-04-06 | 2016-08-10 | 华中师范大学 | Aquaculture method capable of preventing procambarus clarkia from precocious puberty |
| CN114831062A (en) * | 2022-05-31 | 2022-08-02 | 江苏省农业科学院宿迁农科所 | Method for reducing disease rate of commercial crab temporarily breeding in winter |
| CN115589972A (en) * | 2022-09-07 | 2023-01-13 | 南京市水产科学研究所（Cn） | Snail river crab relay ecological breeding method based on pond transformation |
-
2008
- 2008-11-01 CN CNA2008102340430A patent/CN101444194A/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| 叶永兴: "网箱暂养河蟹技术", 《水产养殖》 * |
| 康安娜: "冬季暂养商品河蟹技术", 《黑龙江水产》 * |
| 李廷友等: "有机养殖扣蟹对养殖水体水环境质量的影响研究", 《连云港师范高等专科学校学报》 * |
| 高明: "《河蟹标准化生产技术》", 31 January 2003, 中国农业大学出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239819A (en) * | 2011-05-04 | 2011-11-16 | 苏州市相城区新时代特种水产养殖场 | Method for temporarily cultivating river crabs |
| CN102239819B (en) * | 2011-05-04 | 2013-05-08 | 苏州市相城区新时代特种水产养殖场 | Method for temporarily cultivating river crabs |
| CN102356759A (en) * | 2011-09-20 | 2012-02-22 | 宁波大学 | Three-dimensional pool cultivating method of portunus trituberculatus |
| CN105830974A (en) * | 2016-04-06 | 2016-08-10 | 华中师范大学 | Aquaculture method capable of preventing procambarus clarkia from precocious puberty |
| CN114831062A (en) * | 2022-05-31 | 2022-08-02 | 江苏省农业科学院宿迁农科所 | Method for reducing disease rate of commercial crab temporarily breeding in winter |
| CN115589972A (en) * | 2022-09-07 | 2023-01-13 | 南京市水产科学研究所（Cn） | Snail river crab relay ecological breeding method based on pond transformation |
| CN115589972B (en) * | 2022-09-07 | 2023-10-20 | 南京市水产科学研究所 | Snail river crab relay ecological breeding method based on pond transformation |
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Application publication date: 20090603 |