CN101297641B - Method for capturing blue crab cultured in pond - Google Patents
Method for capturing blue crab cultured in pond Download PDFInfo
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- CN101297641B CN101297641B CN2008100171207A CN200810017120A CN101297641B CN 101297641 B CN101297641 B CN 101297641B CN 2008100171207 A CN2008100171207 A CN 2008100171207A CN 200810017120 A CN200810017120 A CN 200810017120A CN 101297641 B CN101297641 B CN 101297641B
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- portunus trituberculatus
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Abstract
The invention provides a method for capturing portunus trituberculatus cultured in pond, and is characterized in that the head of a table poultry, which is tied on a rope, is close to the bottom of the pond, and the portunus trituberculatus uses pincers to clasp tightly and then can be captured when the head of the carnivorous chicken is lifted out of water and can also be captured selectively according to sexes and sizes. The rope is a polyethylene rope on which floats are added and hung so as to form a float line; the float line is arranged on the water surface of the pond culturing the portunus trituberculatus, the head of the table poultry is drilled through with the polyethylene rope and tied to the float line and sunk to the bottom of the pond. The method is used for capturing the portunus trituberculatus selectively according to the sexes and sizes, has short operation time and can achieve the purpose of avoiding appendage from deforming due to mutual fighting of the portunus trituberculatus in a fixed net and protecting the shrimp which cultured in a mixing mode in culturing pond. By adopting the method, the survival rate of the culturing of the portunus trituberculatus is improved by 20 percent, the complete rate of the appendage of commercial crabs is improved by 30 percent and the economic benefit is obvious.
Description
Technical field
The invention belongs to the swimming crab artificial culture technology, is a kind of method of capturing blue crab cultured in pond specifically.
Background technology
The Portunus trituberculatus Miers crab claw are longer, and belly is shinny, and the crab shell is harder, and mud is few in the body, and meat is delicate in vain, and nutritious, delicious flavour is one of important living marine resources of China.But because marine site fishery overfishing and environment worsen day by day, its natural resources reduces year by year, badly influences the sustainable development of this industrial economy.The northern China later stage coastal eighties in last century begins to propagate artificially, and swimming crab cultured area and output are annual in recent years increases about 20%, nearly 100,000 tons of national swimming crab cultured output, 50,000 hectares of cultured areas.The Portunus trituberculatus Miers breeding way is mainly raised together with based on pond shrimp crab, and before the present invention made, traditional harvesting approach was to utilize modes such as Fixed nets device, crab pot to catch.Because catching modes such as Fixed nets device, crab pot do not have selectivity, prawn crab kind, sex, specification poor selectivity add that the operating time is longer, and comparatively serious to the swimming crab damage, swimming crab survival rate and appendage integrality are cultured in influence.
Summary of the invention
The objective of the invention is to propose a kind of method of capturing blue crab cultured in pond, reach and swimming crab is carried out selectivity according to sex, specification catch, improve and culture swimming crab survival rate and appendage integrality, simple to operate, use convenient.
The objective of the invention is to be achieved through the following technical solutions: a kind of method of capturing blue crab cultured in pond, it is characterized in that: on polyethylene rope, carry additionally float and form buoyant rope, described buoyant rope is arranged on the swimming crab cultivating pool water surface, the meat chicken chicken head is passed and fastens with formal wire on described buoyant rope, described buoyant rope length is 150～200m, chicken head is provided with spacing 2～3m, hang near position at the bottom of the pond fastening at the meat chicken chicken head on the buoyant rope, Portunus trituberculatus Miers is promptly tightly clasped with big chela, it can be caught when chicken head is left the water, to Portunus trituberculatus Miers according to sex, specification is carried out selectivity and is caught.
To further improvement in the technical proposal: according to the swimming crab active behavior, afternoon or dusk put into chicken head and culture the pond, regularly chicken head is lifted from the water surface, be that available little dredger is collected the Portunus trituberculatus Miers of embracing the food chicken head with big chela, with satisfactory Portunus trituberculatus Miers results, remaining is put into the pond immediately and continues to culture as required.
To further improvement in the technical proposal: described polyethylene rope diameter is 8～12mm, and described formal wire specification is 36tex 6 * 3.
The present invention compared with prior art has the following advantages and good effect:
1, the present invention has strong food calling effect according to the meat chicken chicken head to Portunus trituberculatus Miers, utilizes the Portunus trituberculatus Miers life habit to catch, simple to operate, application convenience, and cost is very low, the reusable 5-7 of chicken head days.
2, the present invention is applicable to whole Portunus trituberculatus Miers results process, can select Portunus trituberculatus Miers male and female and specification as required, can in time pick out the Portunus trituberculatus Miers that does not meet the results standard, belongs to nuisanceless environment-friendly type method.
3, operating time of the present invention short, can avoid Portunus trituberculatus Miers to fight mutually and cause the appendage incompleteness in the Fixed nets device internal cause, simultaneously the pond is raised together with biology such as prawn and has no adverse effects.
4, the present invention can make Portunus trituberculatus Miers culture survival rate raising 20%, and commodity crab appendage percentage of head rice improves 30%, remarkable in economical benefits.
Embodiment
Be described in detail technology contents of the present invention below by embodiment:
It is 8～12mm polyethylene rope that the present invention adopts diameter, carry additionally float and form buoyant rope, described buoyant rope is arranged on the swimming crab cultivating pool water surface, the meat chicken chicken head is passed and fastens on described buoyant rope with formal wire (specification is 36tex 6 * 3), hang near position at the bottom of the pond.
Buoyant rope length and chicken head spacing be big or small and swimming crab cultivation density decision according to the breed pond, for easy to operate, and general buoyant rope length 150～200m, chicken head spacing 2～3m.
According to the swimming crab active behavior, in the afternoon or at dusk, the chicken head of fastening is put into cultivating pool, Portunus trituberculatus Miers is promptly tightly clasped with big chela, regularly chicken head is lifted from the water surface, can carry out the selectivity seizure according to sex, specification to swimming crab.General available little dredger is collected the Portunus trituberculatus Miers of embracing the food chicken head with big chela, and with satisfactory Portunus trituberculatus Miers results, remaining is put into the pond continuation immediately and cultures, and reaches the purpose that selectivity is caught Portunus trituberculatus Miers as required.The present invention is applied widely, tests in swimming crab plant, and general every day, every rope was gathered in the crops Portunus trituberculatus Miers 100～200kg, and result of use is good.Can reach and select the male Portunus trituberculatus Miers of results early stage, the purpose of the female Portunus trituberculatus Miers of later stage results gonad development.
Claims (3)
1. the method for a capturing blue crab cultured in pond, it is characterized in that: on polyethylene rope, carry additionally float and form buoyant rope, described buoyant rope is arranged on the swimming crab cultivating pool water surface, the meat chicken chicken head is passed and fastens with formal wire on described buoyant rope, described buoyant rope length is that 150～200m, chicken head are provided with spacing 2～3m, hang near position at the bottom of the pond fastening at the meat chicken chicken head on the buoyant rope, Portunus trituberculatus Miers is promptly tightly clasped with big chela, it can be caught when chicken head is left the water, Portunus trituberculatus Miers be carried out selectivity according to sex, specification catch.
2. according to the method for the described capturing blue crab cultured in pond of claim 1, it is characterized in that: chicken head is put into cultured the pond in the afternoon or at dusk, regularly chicken head is lifted from the water surface, be that available little dredger is collected the Portunus trituberculatus Miers of embracing the food chicken head with big chela, with satisfactory Portunus trituberculatus Miers results, remaining is put into the pond immediately and continues to culture as required.
3. according to the method for the described capturing blue crab cultured in pond of claim 1, it is characterized in that: described polyethylene rope diameter is 8～12mm, and described formal wire specification is 36tex 6 * 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100171207A CN101297641B (en) | 2008-06-20 | 2008-06-20 | Method for capturing blue crab cultured in pond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100171207A CN101297641B (en) | 2008-06-20 | 2008-06-20 | Method for capturing blue crab cultured in pond |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101297641A CN101297641A (en) | 2008-11-05 |
| CN101297641B true CN101297641B (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2008100171207A Active CN101297641B (en) | 2008-06-20 | 2008-06-20 | Method for capturing blue crab cultured in pond |
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| CN (1) | CN101297641B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102805057A (en) * | 2012-07-16 | 2012-12-05 | 宁波大学 | Nondestructive catching method for blue crab seeds |
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2008
- 2008-06-20 CN CN2008100171207A patent/CN101297641B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 杨正兵.河豚鱼延绳钓捕获技术.齐鲁渔业20 2.2003,20(2),41. |
| 杨正兵.河豚鱼延绳钓捕获技术.齐鲁渔业20 2.2003,20(2),41. * |
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| Publication number | Publication date |
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| CN101297641A (en) | 2008-11-05 |
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