CN106804499A - A kind of cultural method of river crab - Google Patents
A kind of cultural method of river crab Download PDFInfo
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- CN106804499A CN106804499A CN201710070201.2A CN201710070201A CN106804499A CN 106804499 A CN106804499 A CN 106804499A CN 201710070201 A CN201710070201 A CN 201710070201A CN 106804499 A CN106804499 A CN 106804499A
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- crab
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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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- 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
- Y02A40/818—Alternative feeds for fish, e.g. in aquacultures
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Abstract
The invention provides a kind of method for breeding river crab, including：（1）Pond selects；（2）Juvenile crab is put in a suitable place to breed；（3）Feed management；（4）Water quality management；（5）Capture.Method for breeding river crab of the invention, pool fully removes mud when processing, sterilized, the cultivation of algae increased water body dissolved oxygen, reduce poisonous and harmful substance, also for river crab provides natural bait and natural sanctuary, the feed of variety classes and proportioning, animal fodder and roughage reasonable mixture ratio are provided in the different growth phases of river crab, hormone and agricultural chemicals are not used, the constitution and survival rate of young crab are improve, the meat of river crab is improved.
Description
Technical field
The present invention relates to aquaculture field, and in particular to a kind of cultural method of river crab.
Background technology
River crab original name Eriocheir sinensis, is young crab before breeding migration, because its shell colour cast is yellow, is commonly called as " yellow crab ", its property
Gland very little, does not develop substantially, and the weight of liver is far longer than gonad weight.When it completes just to be sent out after last time is casted off a skin
It is " green crab " to educate, and shell color ink is green, and gonad development is plentiful, and male crab foot of a chela fine hair silk fabric is close, and step bristle is slightly long, and female crab belly covers completely
The headkerchief cuirass outside of belly, the bristle of abdomen border is long and close.The all one's life of river crab is after zoea, megalops larva, young crab and into crab
Etc. several stages, need the young to cast off a skin for 5 times as megalops larva in life, then casted off a skin through 13-15 times and turn into crab, its all one's life is only
There is a cyclostage, breeding end lives also just terminate, in general, the life-span of river crab is 1-3 week old.River crab feeding habits are very
It is miscellaneous, under field conditions (factors) with drinking water grass, based on humus, addiction spoil, also eating spiral shell, freshwater mussel, worm, insect, once in a while
Also small fish, shrimp are preyed on, also can cannibalism during food deprivation.
The breeding way of current river crab is gradually fished for propagating transformation artificially from natural, and scale is increasing.
During propagating artificially, it will usually big using larger cultivation density, cooperation is sprayed insecticide and hormone, and uses concentrate feed
Or premix is fed so that the meat of river crab is poor, body can be also influenceed to be good in vivo containing more hormone, after human consumption
Health.
The content of the invention
For the defect of prior art, it is an object of the invention to provide a kind of cultural method of river crab, it is possible to increase river crab
Survival rate, improve river crab meat.
The present invention solves technical problem and adopts the following technical scheme that：
The invention provides a kind of cultural method of river crab, the cultural method is comprised the following steps：
（1）Pond selects：The pond of 2-3 mus of area is selected, after pond water is allowed to dry, mud is removed, 3- is spread in exposure 15-20 days
4cm thick river sand, is filled to after the depth of water reaches 35-40cm and uniformly sheds bleaching powder 30-40kg, is delivered after 5 days and accounts for pond face
The pasture and water of product 1/3 or so, in pond, surrounding sets escaping-preventing facilities；
（2）Juvenile crab is put in a suitable place to breed：First juvenile crab is put into the potassium permanganate solution of an a ten thousandth concentration, is taken out after 1 minute, 5 points
Be placed again into after clock, according to this continuous three times of method, each interval time increases by two minutes, afterwards according to 5-6kg/ mus density to
Juvenile crab is put into pond；
（3）Feed management：Juvenile crab puts early stage in a suitable place to breed and feeds the first feed 2 times daily, feeds 1-3kg/ mus, after 1 month every time daily
Feed the second feed 4 times daily, feed 1-3kg/ mus every time daily, the 3rd feed is fed 3 times daily after 3 months, daily every time
Feed 3-6kg/ mus；
（4）Water quality management：Juvenile crab is filled to the depth of water up to 0.8-1.0m after putting in a suitable place to breed 1 month, water was changed every 15-20 days 1 time, quantity of exchanged water
Ensure in 20%-25% or so, transparency is maintained at 40-45cm or so, and uniformly sheds quick lime 8kg/ mus every 8-10 days；
（5）Capture：Captured by when the average weight of river crab reaches more than 90g.
Preferably, profundal zone and phytal zone are provided with the pool, profundal zone area accounts for the 1/2-3/ of phytal zone area
4。
Preferably, the escaping-preventing facilities are glass wall or plastic sheeting.
Preferably, step（1）The pasture and water are selected from hornwort, hydrilla verticillata, eel grass, waterweed, water peanut, water hyacinth
One or more.
Preferably, step（3）First feed includes fish meal, sweet potato, small fish, according to 2:1.5:1 part by weight
Prepare.
Preferably, the step（3）In the second feed include soya-bean cake, wheat bran, wheat-middlings, small fish, according to 3:1:1:0.5
Part by weight prepare.
Preferably, the step（3）In the 3rd feed include dregs of beans, shrimp slurry, bean curd, according to 2:1:1 part by weight
Prepare.
Preferably, step（5）The method of the capture includes crab pot capture, drift net capture or light capture.
Compared with prior art, the present invention has following beneficial effect：
Method for breeding river crab of the invention, pool fully removes mud when processing, and is sterilized, and the cultivation of algae increased
Water body dissolved oxygen, reduces poisonous and harmful substance, also for river crab provides natural bait and natural sanctuary；It is raw in the difference of river crab
Stage long provides the feed of variety classes and proportioning, animal fodder and roughage reasonable mixture ratio, and hormone and agricultural chemicals are not used,
The constitution and survival rate of young crab are improve, the meat of river crab is improved.The escaping-preventing facilities of glass wall or plastic sheeting are prevented from
Escaping for river crab, improves yield.River crab delicious meat, the safety and Health for cultivating out, increased economic benefit, with pushing away well
Wide value.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.These embodiments be merely to illustrate the present invention and without
In limitation the scope of the present invention.
Embodiment 1.
（1）Pond selects：The pond of 2-3 mus of area is selected, after pond water is allowed to dry, mud is removed, 3- is spread in exposure 15-20 days
4cm thick river sand, is filled to after the depth of water reaches 35-40cm and uniformly sheds bleaching powder 30-40kg, is delivered after 5 days and accounts for pond face
The pasture and water of product 1/3 or so, in pond, surrounding sets escaping-preventing facilities；
（2）Juvenile crab is put in a suitable place to breed：First juvenile crab is put into the potassium permanganate solution of an a ten thousandth concentration, is taken out after 1 minute, 5 points
Be placed again into after clock, according to this continuous three times of method, each interval time increases by two minutes, afterwards according to 5-6kg/ mus density to
Juvenile crab is put into pond；
（3）Feed management：Juvenile crab puts early stage in a suitable place to breed and feeds the first feed 2 times daily, feeds 1kg/ mus every time daily, every after 1 month
It feeds the second feed 4 times, feeds 1kg/ mus every time daily, and the 3rd feed is fed 3 times daily after 3 months, feeds every time daily
3kg/ mus；
（4）Water quality management：Juvenile crab is filled to the depth of water up to 0.8-1.0m after putting in a suitable place to breed 1 month, water was changed every 15-20 days 1 time, quantity of exchanged water
Ensure in 20%-25% or so, transparency is maintained at 40-45cm or so, and uniformly sheds quick lime 8kg/ mus every 8-10 days；
（5）Capture：Captured by when the average weight of river crab reaches more than 90g.
Wherein, profundal zone and phytal zone are provided with pool, profundal zone area accounts for the 1/2-3/4 of phytal zone area, anti-escape
Facility is glass wall or plastic sheeting, step（1）The pasture and water be selected from hornwort, hydrilla verticillata, eel grass, waterweed, water peanut,
One or more in water hyacinth, step（3）In the first feed include fish meal, sweet potato, small fish, according to 2:1.5:1 weight
Amount proportions, step（3）In the second feed include soya-bean cake, wheat bran, wheat-middlings, small fish, according to 3:1:1:0.5 weight ratio
Example is prepared, step（3）In the 3rd feed include dregs of beans, shrimp slurry, bean curd, according to 2:1:1 part by weight is prepared, step（5）
The method of the capture includes crab pot capture, drift net capture or light capture.
After being cultivated by the present embodiment methods described, average every mu of results 6.8kg, wherein average size 105g, 120g/ only with
On big specification crab account for 23.4%, the cultivation rate of recapture is 28.7%, with preferable economic benefit.
Embodiment 2.
（1）Pond selects：The pond of 2-3 mus of area is selected, after pond water is allowed to dry, mud is removed, 3- is spread in exposure 15-20 days
4cm thick river sand, is filled to after the depth of water reaches 35-40cm and uniformly sheds bleaching powder 30-40kg, is delivered after 5 days and accounts for pond face
The pasture and water of product 1/3 or so, in pond, surrounding sets escaping-preventing facilities；
（2）Juvenile crab is put in a suitable place to breed：First juvenile crab is put into the potassium permanganate solution of an a ten thousandth concentration, is taken out after 1 minute, 5 points
Be placed again into after clock, according to this continuous three times of method, each interval time increases by two minutes, afterwards according to 5-6kg/ mus density to
Juvenile crab is put into pond；
（3）Feed management：Juvenile crab puts early stage in a suitable place to breed and feeds the first feed 2 times daily, feeds 1.5kg/ mus, after 1 month every time daily
Feed the second feed 4 times daily, feed 1.5kg/ mus every time daily, the 3rd feed is fed 3 times daily after 3 months, daily every time
Feed 4.5kg/ mus；
（4）Water quality management：Juvenile crab is filled to the depth of water up to 0.8-1.0m after putting in a suitable place to breed 1 month, water was changed every 15-20 days 1 time, quantity of exchanged water
Ensure in 20%-25% or so, transparency is maintained at 40-45cm or so, and uniformly sheds quick lime 8kg/ mus every 8-10 days；
（5）Capture：Captured by when the average weight of river crab reaches more than 90g.
Wherein, profundal zone and phytal zone are provided with pool, profundal zone area accounts for the 1/2-3/4 of phytal zone area, anti-escape
Facility is glass wall or plastic sheeting, step（1）The pasture and water be selected from hornwort, hydrilla verticillata, eel grass, waterweed, water peanut,
One or more in water hyacinth, step（3）In the first feed include fish meal, sweet potato, small fish, according to 2:1.5:1 weight
Amount proportions, step（3）In the second feed include soya-bean cake, wheat bran, wheat-middlings, small fish, according to 3:1:1:0.5 weight ratio
Example is prepared, step（3）In the 3rd feed include dregs of beans, shrimp slurry, bean curd, according to 2:1:1 part by weight is prepared, step（5）
The method of the capture includes crab pot capture, drift net capture or light capture.
After being cultivated by the present embodiment methods described, average every mu of results 7.2kg, wherein average size 107g, 120g/ only with
On big specification crab account for 25.8%, the cultivation rate of recapture is 23.1%, with preferable economic benefit.
Embodiment 3.
（1）Pond selects：The pond of 2-3 mus of area is selected, after pond water is allowed to dry, mud is removed, 3- is spread in exposure 15-20 days
4cm thick river sand, is filled to after the depth of water reaches 35-40cm and uniformly sheds bleaching powder 30-40kg, is delivered after 5 days and accounts for pond face
The pasture and water of product 1/3 or so, in pond, surrounding sets escaping-preventing facilities；
（2）Juvenile crab is put in a suitable place to breed：First juvenile crab is put into the potassium permanganate solution of an a ten thousandth concentration, is taken out after 1 minute, 5 points
Be placed again into after clock, according to this continuous three times of method, each interval time increases by two minutes, afterwards according to 5-6kg/ mus density to
Juvenile crab is put into pond；
（3）Feed management：Juvenile crab puts early stage in a suitable place to breed and feeds the first feed 2 times daily, feeds 3kg/ mus every time daily, every after 1 month
It feeds the second feed 4 times, feeds 1.5kg/ mus every time daily, and the 3rd feed is fed 3 times daily after 3 months, feeds every time daily
Support 5kg/ mus；
（4）Water quality management：Juvenile crab is filled to the depth of water up to 0.8-1.0m after putting in a suitable place to breed 1 month, water was changed every 15-20 days 1 time, quantity of exchanged water
Ensure in 20%-25% or so, transparency is maintained at 40-45cm or so, and uniformly sheds quick lime 8kg/ mus every 8-10 days；
（5）Capture：Captured by when the average weight of river crab reaches more than 90g.
Wherein, profundal zone and phytal zone are provided with pool, profundal zone area accounts for the 1/2-3/4 of phytal zone area, anti-escape
Facility is glass wall or plastic sheeting, step（1）The pasture and water be selected from hornwort, hydrilla verticillata, eel grass, waterweed, water peanut,
One or more in water hyacinth, step（3）In the first feed include fish meal, sweet potato, small fish, according to 2:1.5:1 weight
Amount proportions, step（3）In the second feed include soya-bean cake, wheat bran, wheat-middlings, small fish, according to 3:1:1:0.5 weight ratio
Example is prepared, step（3）In the 3rd feed include dregs of beans, shrimp slurry, bean curd, according to 2:1:1 part by weight is prepared, step（5）
The method of the capture includes crab pot capture, drift net capture or light capture.
After being cultivated by the present embodiment methods described, average every mu of results 7.4kg, wherein average size 108g, 120g/ only with
On big specification crab account for 26.1%, the cultivation rate of recapture is 23.7%, with preferable economic benefit.
By above-described embodiment as can be seen that method for breeding river crab of the present invention reduces the venomous injurant in pond
Matter, for river crab provides nutritious natural bait and stage by stage feed, improves the constitution and survival rate of river crab, improves
The meat of river crab.
Specific embodiment of the invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can within the scope of the claims make various deformations or amendments, this not shadow
Sound substance of the invention.
Claims (8)
1. a kind of cultural method of river crab, it is characterised in that the cultural method is comprised the following steps：
（1）Pond selects：The pond of 2-3 mus of area is selected, after pond water is allowed to dry, mud is removed, 3- is spread in exposure 15-20 days
4cm thick river sand, is filled to after the depth of water reaches 35-40cm and uniformly sheds bleaching powder 30-40kg, is delivered after 5 days and accounts for pond face
The pasture and water of product 1/3 or so, in pond, surrounding sets escaping-preventing facilities；
（2）Juvenile crab is put in a suitable place to breed：First juvenile crab is put into the potassium permanganate solution of an a ten thousandth concentration, is taken out after 1 minute, 5 points
Be placed again into after clock, according to this continuous three times of method, each interval time increases by two minutes, afterwards according to 5-6kg/ mus density to
Juvenile crab is put into pond；
（3）Feed management：Juvenile crab puts early stage in a suitable place to breed and feeds the first feed 2 times daily, feeds 1-3kg/ mus, after 1 month every time daily
Feed the second feed 4 times daily, feed 1-3kg/ mus every time daily, the 3rd feed is fed 3 times daily after 3 months, daily every time
Feed 3-6kg/ mus；
（4）Water quality management：Juvenile crab is filled to the depth of water up to 0.8-1.0m after putting in a suitable place to breed 1 month, water was changed every 15-20 days 1 time, quantity of exchanged water
Ensure in 20%-25% or so, transparency is maintained at 40-45cm or so, and uniformly sheds quick lime 8kg/ mus every 8-10 days；
（5）Capture：Captured by when the average weight of river crab reaches more than 90g.
2. method for breeding river crab according to claim 1, it is characterised in that profundal zone and shallow water are provided with the pool
Area, profundal zone area accounts for the 1/2-3/4 of phytal zone area.
3. method for breeding river crab according to claim 1, it is characterised in that the escaping-preventing facilities are that glass wall or plastics are thin
Film.
4. method for breeding river crab according to claim 1, it is characterised in that step（1）The pasture and water are selected from hornwort, wheel
One or more in the black algae of leaf, eel grass, waterweed, water peanut, water hyacinth.
5. method for breeding river crab according to claim 1, it is characterised in that step（3）First feed include fish meal,
Sweet potato, small fish, according to 2:1.5:1 part by weight is prepared.
6. method for breeding river crab according to claim 1, it is characterised in that step（3）Second feed include soya-bean cake,
Wheat bran, wheat-middlings, small fish, according to 3:1:1:0.5 part by weight is prepared.
7. method for breeding river crab according to claim 1, it is characterised in that step（3）3rd feed include dregs of beans,
Shrimp slurry, bean curd, according to 2:1:1 part by weight is prepared.
8. method for breeding river crab according to claim 1, it is characterised in that step（5）The method of the capture includes crab
Cage capture, drift net capture or light capture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710070201.2A CN106804499A (en) | 2017-02-09 | 2017-02-09 | A kind of cultural method of river crab |
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| CN201710070201.2A CN106804499A (en) | 2017-02-09 | 2017-02-09 | A kind of cultural method of river crab |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107372255A (en) * | 2017-09-11 | 2017-11-24 | 苏州市相城区阳澄湖镇剑成水产生态养殖专业合作社 | A kind of scientific culture method of Taihu Lake crab |
| CN107751065A (en) * | 2017-10-27 | 2018-03-06 | 宿松县东求水产开发有限公司 | A kind of cultural method of crab |
| CN110731286A (en) * | 2019-11-26 | 2020-01-31 | 江苏省农业科学院宿迁农科所 | Outdoor net cage stocking method for commercial river crabs |
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| CN107751065A (en) * | 2017-10-27 | 2018-03-06 | 宿松县东求水产开发有限公司 | A kind of cultural method of crab |
| CN110731286A (en) * | 2019-11-26 | 2020-01-31 | 江苏省农业科学院宿迁农科所 | Outdoor net cage stocking method for commercial river crabs |
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