CN100591204C - Larval crab cultivating pond and the cultivating method - Google Patents
Larval crab cultivating pond and the cultivating method Download PDFInfo
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- CN100591204C CN100591204C CN200710008829A CN200710008829A CN100591204C CN 100591204 C CN100591204 C CN 100591204C CN 200710008829 A CN200710008829 A CN 200710008829A CN 200710008829 A CN200710008829 A CN 200710008829A CN 100591204 C CN100591204 C CN 100591204C
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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
The invention relates to a Scylla serrata seed cultivating pool and relative method, in particular to a method for improving survival rate and growing seed Scylla serrata quickly. the invention comprises a main pool and a seed pool, wherein the bottom of th main pool is provided with a slope inclined along a water outlet, and a sand layer, the sand layer is provided with at least one groove extended from the high part to the lower part of the bottom of the main pool to be collected into the water outlet, the seed pool is arranged under the water outlet with a network box inside. The water specific weight is 1.006-1.015 while the seed cultivating density is 2000-3000n/m2, while the water is exchanged each day and the forge is fish slurry, shellfish meat, or the like to be fed for at least four times and 2-3 times of seed weight, and the whole cultivation is aerated continuously.
Description
Technical field
The present invention relates to a kind of blue crab cultivation method, especially relate to a kind of particular facility that adopts and improve the method that the also convenient young crab of larval crab survival rate emerges and sells.
Background technology
Mud crab meat flavour deliciousness, nutritious, be good mariculture kind.Blue crab cultivation has become emerging marine industries.So far, the mud crab artificial breeding technique is day by day ripe, however reports such as nutrition, salinity and the temperature condition of relevant young crab cultivating process still few (Qiao Zhenguo. the science and technology of mud crab seed rearing is made progress. sea fishery, 2005,27 (2): 159-163), young crab cultivate mode still needs further perfect.
Lack at present the special facilities of cultivating young crab, the dealer utilizes prawn or fish nursery pond to cultivate usually, but there are following two big shortcomings in this type of nursery pond: 1. habitat: young crab is sought the end life of dwelling, and natural disposition is fierce and cruel bellicose, and it is serious to kill and devour phenomenon mutually.The nursery pond of cement structures can't provide young crab required bury the condition of dwelling, it is limited to add the nursery pond floor space, is unfavorable for young crab existence.2. the facility of emerging: emerge and juvenile crab and swill etc. must be developed together in the clear pond of young crab, the distance of nursery pond discharge outlet and Na Miaogou is too near, lacks a facility that separates young crab and dirt, and young crab goes out behind the pond and dirt mixes agglomeratingly, is difficult to sorting.The whole process of emerging has expended considerable manpower and time, and has caused mechanical damage and the death of juvenile crab.
Therefore need design to be suitable for the specialized facilities that young crab is cultivated, set up and improve young crab cultivate mode, to promote the development of blue crab cultivation industrialization.
Summary of the invention
The present invention is intended to cultivate facility and the existing above-mentioned deficiency of breeding method thereof at existing larval crab, provides a kind of larval crab that can improve young crab survival rate and make things convenient for juvenile crab to sell to cultivate pond and breeding method.
Larval crab of the present invention is cultivated the pond and is provided with main tank body and Na Miaochi, and the main tank body bottom has along the gradient of discharge outlet inclination, and the main tank body bottom is covered with the silt layer, and the silt layer is used for young crab and buries the life of dwelling, and cuts one another's throat with minimizing.The silt layer is provided with at least 1 chase, and chase extends to lower from main tank body bottom eminence, is aggregated into discharge outlet at last.Na Miaochi is located at the outer below of main tank body discharge outlet.Receive and be provided with net cage in the seedling pond.
The main tank body bottom has the gradient that tilts along discharge outlet and is preferably 5～10 °, and the granularity of the sand in the silt layer is preferably 0.5～1mm, and husky shared ratio is preferably 70%～80% of total volume of silt, and the thickness of silt layer is preferably 10～15cm.The width of set chase can be 10～20cm on the silt layer, is preferably 15cm.The width of Na Miaochi is 60cm at least, and length is 100cm at least, and the degree of depth is 60～100cm, is preferably 70cm.Receive that set net cage is preferably the rectangle net cage in the seedling pond.
Larval crab breeding method of the present invention is:
1) select for use larval crab of the present invention to cultivate the pond, the proportion of water is 1.006～1.015, and to cultivating in the pond, it is 2000～3000 tails/m that young crab is cultivated density with young crab input of the first phase
2
2) change water every day;
3) feed is in fish slurry, shellfish meat, prawn feed, the eel feed etc. at least a kind, throws something and feeds every day at least 4 times, and feeding volume is 2～3 times of young crab body weight;
4) whole cultivating process continuous charge.
The water temperature that larval crab is cultivated the pond is preferably 25.5～32.5 ℃, and the quantity of exchanged water that changes water every day is preferably 25%～35% of pond water inventory.
Because larval crab of the present invention is cultivated the pond and is provided with main tank body and Na Miaochi, the main tank body bottom has along the gradient of discharge outlet inclination, and the main tank body bottom is covered with the silt layer, and the silt layer is used for young crab and buries the life of dwelling, and cuts one another's throat with minimizing.The silt layer is provided with chase, and chase extends to lower and is aggregated into discharge outlet from main tank body bottom eminence.Na Miaochi is located at the outer below of main tank body discharge outlet.Receive and be provided with net cage in the seedling pond.When draining was emerged, young crab creeped along the gradient of silt layer, and compiled and enter chase, and young crab enters net cage from chase.Water is all arranged inside and outside the net cage, when young crab enters net cage, can in time separate juvenile crab and dirt, and can not cause mechanical damage.The mesh of net cage can suitably be adjusted according to the individual size of young crab.Therefore the present invention had both improved young crab survival rate, conveniently went out the pond again and sold.Larval crab breeding method of the present invention is particularly suitable for first phase son crab is cultivated to young crab of third and fourth phase, and survival rate can reach about 70%.
Embodiment
Embodiment 1: larval crab is cultivated the pond and is provided with main tank body and Na Miaochi, cultivates pool area 20m
2, the main tank body bottom has along the gradient of 5 ° of discharge outlet inclinations, and the main tank body bottom is covered with the silt layer that thickness is 10～12cm, and the granularity of the sand in the silt layer is 0.5～1mm, and husky shared ratio is 70%～75% of a total volume of silt.The silt layer is used for young crab and buries the life of dwelling, and cuts one another's throat with minimizing.The silt layer is provided with 3 chases, and the width of chase is 15～18cm, and chase extends to lower from main tank body bottom eminence, is aggregated into discharge outlet at last.Na Miaochi is located at the outer below of main tank body discharge outlet, and the length of Na Miaochi is 60cm, and wide is 100cm, is 60cm deeply.Receive and be provided with the rectangle net cage in the seedling pond.
The water temperature of cultivating the pond is 25.5～28 ℃, and the proportion of water is 1.01～1.015, and to cultivating in the pond, it is 2000 tails/m that young crab is cultivated density with young crab input of the first phase
2Every day, quantity of exchanged water was 30% of a pond water inventory; The fish of throwing something and feeding slurry and shellfish meat are thrown something and fed 1 every day, and feeding volume is 3 times of young crab body weight; Whole cultivating process continuous charge, survival rate can reach about 70%.
Embodiment 2: similar to Example 1, its difference is to cultivate pool area 20m
2, bottom sediment layer thickness 10cm, the main tank body bottom has along the gradient of 5 ° of discharge outlet inclinations, and silt layer central longitudinal is to being provided with 1 chase, and the first phase, young crab was thrown in 40,000 tails, and cultivation density is 2000 tails/m
2, throw something and feed shellfish meat and eel feed etc. are thrown something and fed 1 every day, and feeding volume is 2 times of young crab body weight, 25.5～28.5 ℃ of the water temperatures in cultivation pond, proportion 1.006～1.012.The trace inflation continuously of whole cultivating process, through cultivation in 7 days, casting off a skin became young crab of the third phase, and survival rate is 86%.
Embodiment 3: similar to Example 1, its difference is to cultivate pool area 20m
2, bottom sediment layer thickness 10cm, the main tank body bottom has along the gradient of 8 ° of discharge outlet inclinations, and silt layer central longitudinal is to being provided with 2 chases, and the first phase, young crab was thrown in 60,000 tails, and cultivation density is 3000 tails/m
2, throw something and feed shellfish meat and eel feed etc. are thrown something and fed 3 every day, and feeding volume is 2.5 times of body weight, cultivates 25.5～28.5 ℃ of temperature, proportion 1.006～1.012.The trace inflation continuously of whole cultivating process, through cultivation in 7 days, casting off a skin became young crab of the fourth phase, and survival rate is 72%.
Embodiment 4: similar to Example 1, its difference is to cultivate pool area 50m
2, bottom sediment layer thickness 15cm, the main tank body bottom has along the gradient of 10 ° of discharge outlet inclinations, and the silt layer is provided with 3 chases.The first phase, young crab was thrown in 100,000 tails, and cultivation density is 2000 tails/m
2, the fish of throwing something and feeding slurry, shellfish meat and prawn feed etc. are thrown something and fed 5 every day, and feeding volume is 2 times of body weight, cultivates 27.5～32.5 ℃ of temperature, proportion 1.008～1.014.The trace inflation continuously of whole cultivating process, through cultivation in 7 days, casting off a skin became young crab of the third phase, and survival rate is 83%.
Embodiment 5: similar to Example 1, its difference is to cultivate pool area 50m
2, bottom sediment layer thickness 15cm, the main tank body bottom has along the gradient of 6 ° of discharge outlet inclinations, and the silt layer is provided with 2 chases.The first phase, young crab was thrown in 12.5 ten thousand tails, and cultivation density is 2500 tails/m
2, the fish of throwing something and feeding slurry, shellfish meat and prawn feed etc. are thrown something and fed 4 every day, and feeding volume is 2.5 times of body weight, cultivates 28.0～31.5 ℃ of temperature, proportion 1.009～1.015.The trace inflation continuously of whole cultivating process, through cultivation in 7 days, casting off a skin became young crab of the third phase, and survival rate is 76%.
Embodiment 6: similar to Example 1, its difference is to cultivate pool area 120m
2, bottom sediment layer thickness 20cm, the main tank body bottom has along the gradient of 10 ° of discharge outlet inclinations, and the silt layer is provided with 3 chases.The first phase, young crab was thrown in 360,000 tails, and cultivation density is 3000 tails/m
2, the fish of throwing something and feeding slurry, shellfish meat and eel feed etc. are thrown something and fed 6 every day, and feeding volume is 3 times of body weight, cultivates 28.5～32.5 ℃ of temperature, proportion 1.009～1.015.The trace inflation continuously of whole cultivating process, through cultivation in 7 days, casting off a skin became young crab of the third phase, and survival rate is 66%.
Embodiment 7: similar to Example 1, its difference is to cultivate pool area 300m
2, bottom sediment layer thickness 20cm, the main tank body bottom has along the gradient of 10 ° of discharge outlet inclinations, and the silt layer is provided with 6 chases.The first phase, young crab was thrown in 600,000 tails, and cultivation density is 2000 tails/m
2, the fish of throwing something and feeding slurry, shellfish meat and prawn feed etc. are thrown something and fed 5 every day, and feeding volume is 3 times of body weight, cultivates 29.5～32.5 ℃ of temperature, proportion 1.007～1.015.The trace inflation continuously of whole cultivating process, through cultivation in 10 days, casting off a skin became young crab of the fourth phase, and survival rate is 63%.
Claims (10)
1. larval crab is cultivated the pond, it is characterized in that being provided with main tank body and Na Miaochi, the main tank body bottom has along the gradient of discharge outlet inclination, the main tank body bottom is covered with the silt layer, the silt layer is provided with at least 1 chase, chase extends from main tank body bottom eminence and is aggregated into discharge outlet again to lower, and Na Miaochi is located at the outer below of main tank body discharge outlet, receives to be provided with net cage in the seedling pond.
2. larval crab as claimed in claim 1 is cultivated the pond, and the gradient that it is characterized in that described inclination is 5～10 °.
3. larval crab as claimed in claim 1 is cultivated the pond, and the granularity that it is characterized in that the sand in the silt layer is 0.5～1mm.
4. larval crab as claimed in claim 1 is cultivated the pond, it is characterized in that the husky shared ratio in the silt layer is 70%～80% of a total volume of silt, and the thickness of silt layer is 10～15cm.
5. cultivate the pond as claim 1 or 4 described larval crabs, the width that it is characterized in that chase set on the silt layer is 10～20cm.
6. larval crab as claimed in claim 1 is cultivated the pond, and the width that it is characterized in that Na Miaochi is 60cm at least, and length is 100cm at least, and the degree of depth is 60～100cm.
7. larval crab as claimed in claim 1 is cultivated the pond, it is characterized in that receiving that set net cage is the rectangle net cage in the seedling pond.
8. larval crab as claimed in claim 1 is cultivated the breeding method in pond, it is characterized in that:
1) select for use larval crab to cultivate the pond, the proportion of water is 1.006～1.015, and to cultivating in the pond, it is 2000～3000 tails/m that young crab is cultivated density with young crab input of the first phase
2
2) change water every day;
3) feed is in fish slurry, shellfish meat, prawn feed, the eel feed etc. at least a kind, throws something and feeds every day at least 4 times, and feeding volume is 2～3 times of young crab body weight;
4) whole cultivating process continuous charge.
9. larval crab as claimed in claim 8 is cultivated the breeding method in pond, it is characterized in that it is 25.5～32.5 ℃ that larval crab is cultivated the water temperature in pond.
10. larval crab as claimed in claim 8 is cultivated the breeding method in pond, and the quantity of exchanged water that it is characterized in that changing every day water is 25%～35% of a pond water inventory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200710008829A CN100591204C (en) | 2007-04-13 | 2007-04-13 | Larval crab cultivating pond and the cultivating method |
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| CN200710008829A CN100591204C (en) | 2007-04-13 | 2007-04-13 | Larval crab cultivating pond and the cultivating method |
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| CN101040606A CN101040606A (en) | 2007-09-26 |
| CN100591204C true CN100591204C (en) | 2010-02-24 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101904307B (en) * | 2009-06-08 | 2011-09-28 | 中国水产科学研究院东海水产研究所 | Method for culturing mud crab seedlings |
| CN102349463B (en) * | 2011-09-02 | 2013-11-20 | 宁波市海洋与渔业研究院 | Biological cultivation method for mulch film enclosure pond of blue crab seedling |
| CN102893932B (en) * | 2012-09-14 | 2013-11-13 | 中国水产科学研究院东海水产研究所 | Method for juvenile crab transfer in crab cultivation process |
| CN106069943A (en) * | 2016-06-30 | 2016-11-09 | 广德县强林水产养殖专业合作社 | A kind of crab seedling box breeding method |
| CN113875660A (en) * | 2021-09-15 | 2022-01-04 | 集美大学 | Application of environment-friendly elastic filler in improving survival rate of blue crab seedlings |
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| CN1444847A (en) * | 2002-03-19 | 2003-10-01 | 李应森 | Ecological breeding and ecological culturing method for Chinese fine hair chela crab |
| CN1586184A (en) * | 2004-07-16 | 2005-03-02 | 冯志江 | Cultivating method for soft shell freshwater crab |
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Patent Citations (2)
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|---|---|---|---|---|
| CN1444847A (en) * | 2002-03-19 | 2003-10-01 | 李应森 | Ecological breeding and ecological culturing method for Chinese fine hair chela crab |
| CN1586184A (en) * | 2004-07-16 | 2005-03-02 | 冯志江 | Cultivating method for soft shell freshwater crab |
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