CN105613364A

CN105613364A - Large-scale micro-water net cage culture method for family juvenile crabs of Eriocheir sinensis

Info

Publication number: CN105613364A
Application number: CN201510599335.4A
Authority: CN
Inventors: 刘胥; 郑岩; 孙娜; 席文秋; 白永安
Original assignee: PANJIN GUANGHE CRAB INDUSTRY Co Ltd
Current assignee: PANJIN GUANGHE CRAB INDUSTRY Co Ltd
Priority date: 2015-09-20
Filing date: 2015-09-20
Publication date: 2016-06-01
Anticipated expiration: 2035-09-20
Also published as: CN105613364B

Abstract

The invention discloses a large-scale micro-water net cage culture method for family juvenile crabs of Eriocheir sinensis and belongs to the technical field of aquatic Eriocheir sinensis culture. The method comprises specific steps as follows: landing stages are erected in a pond, cross bars are arranged between adjacent landing stages, net cages are suspended on the cross bars, a water supply system is adjusted, water added to each net cage is controlled, and inside and outside of the net cage are in a micro-water state accordingly. The juvenile crabs produced by one breeding crab are cultured in each net cage and constitute a family. The culture is performed in an outdoor earth pond, the juvenile crabs are subjected to natural exercise to a certain degree, and the quality is improved; 200 families can be cultured in the pond with the size of 2 mu, the breeding scale is greatly increased, and the breeding process is greatly accelerated; water in the whole pond is in the flowing state all along, uniformity of the culture environment of all families of juvenile crabs is guaranteed, the environmental deviation is smaller, genetic factors are prominent, comparability of the families is increased, the selection accuracy is improved, and breeding process is accelerated.

Description

Crab extensive family juvenile crab miniflow network of rivers case breeding method

Technical field

The present invention relates to the culturing and reproducing of a kind of aquatic products, the breeding method of especially a kind of crab juvenile crab, specifically a kind of crab extensive family juvenile crab miniflow network of rivers case breeding method, belongs to Aquatic product culture of Chinese mitten crab technical field.

Background technology

Crab formal name used at school Eriocheir sinensis (EriocheirsinsensisH.), is under the jurisdiction of Arthropoda, Crustachia, Decapoda, Grapsidae, bending of leg Eriocheir sinensis subfamily, Eriocheir. Crab meat flavour is delicious, nutritious, is a kind of aquatic products deeply liked by the masses, is the particularly important Aquatic product economic living of China. Along with the development of culture of Chinese mitten crab industry, the demand of crab breeding is day by day vigorous, and crab fine-variety breeding is increasingly subject to the attention of insider. Current crab fine-variety breeding mainly adopts unexpected mass incident and two kinds of methods of family selective breeding, and family selective breeding is because its fast feature of progress becomes first-selected method. Existing family selective breeding mode may be roughly divided into two classes, one class is that the mode adopting early stage shrimp Eriocheir sinensis industrial seedling rearing carries out with small containers (volume about 200 liters) such as hatching cylinders in workshop, one class is to adopt current main flow crab earth pond ecological seedling raising manners, builds small-sized Tu Chi and carries out. Both of which all also exists intrinsic defect, the former indoor raising of seedling pattern has been produced the pattern eliminated, the juvenile crab body constitution of its output is more weak, later stage cultivation survival rate is low, the latter's required soil pond quantity is many, cost is high and each pool environment homogeneity is poor, it is more difficult to forming scale, these have all delayed the process of crab good variety selection.

Summary of the invention

Pin indoor raising of seedling juvenile crab body constitution of the present invention is weak, the problem that Tu Chi mono-pond seedling raising environment homogeneity difference cost is high, invents a kind of breeding method of the extensive family crab Seedling of net cage miniflow water in soil pond. The technical scheme is that a kind of crab extensive family juvenile crab miniflow network of rivers case breeding method, it is characterized in that comprising the following steps: first, select the native pond of 2��5 mu of sizes as cultivating pond, it is desirable to have independent culvert system, at the bottom of pond smooth, pond use before thoroughly remove mud; Secondly, parallel erection trestle in pond, set up cross bar between two trestles, net cage water-adding system is installed in trestle side; 3rd, juvenile crab cultivation water processes; 4th, net cage is suspended on cross bar, plants after Eriocheir sinensis loads product Seedling cage and put into row children in net cage, row children removes the product Seedling cage equipped with kind of Eriocheir sinensis after terminating; 5th, micro-running water technology juvenile crab, until growing up to megalops larva; Finally, whole pond water body treatment, each net cage individually drags for Seedling and puts in a suitable place to breed, and juvenile crab is cultivated and terminates. Described trestle, bridge floor is wide 1 meter, and bridge is high 2 meters, and trestle spacing 1.2 meters in pond be arranged in parallel, sets up cross bar between two bridges, and bar is from 1 meter. Described net cage is pentahedron structure, is fabricated to 80 mesh sieve tulles, and bottom surface is the square of the length of side 1 meter, high 1.5 meters, top-open, and net cage is fixed in the rigid backbone that the materials such as reinforcing bar are made, and makes bolting silk net tighten open and flat. Described net cage hangs quantity 1000 square meter pond less than 200. Described net cage water-adding system includes water pump, main pipeline, branch pipe(tube) and adjustment valve, and branch pipe(tube) can go deep into lower 1 meter of net cage internal water, branch pipe(tube) end blocks, and on underwater portion tube wall, interval 10cm opens 1 and irises out water hole, aperture 2mm from top to bottom, often 8 holes of circle, respectively iris out orientation, water hole and stagger. It is that sea water is entered in kind of first 20 days ponds of Eriocheir sinensis row children that described water processes, water inlet is through 150 mesh sieve tulle bag filtrations, the depth of water 1.8 meters, planting the front 15 Tianchi water of Eriocheir sinensis row children uses tea seed cakes, bleaching powder to sterilize successively, plant Eriocheir sinensis row children first 10 days inoculation post-directed training Chaetoceros and chlorellas in pond, make water transparence reach 20cm��30cm. Described micro-running water technology juvenile crab is that control valve makes each net cage can add 1m3 water in every 12 hours. Throwing something and feeding in net cage every day fresh and alive wheel animalcule, maintain wheel animalcule density in net cage and be not less than 500/L, the outside wheel animalcule density of net cage is not less than 100/L. Described whole pond water body treatment is by repeatedly discharging sea water in pond, add equivalent fresh water mode carry out, each displacement less than 20cm, every 12 hours 1 time

The beneficial effect of the invention:

The present invention carries out in outdoor earth pond, and juvenile crab stands a degree of exercise naturally, and quality is improved. Adopting net cage seedling nursery, guaranteeing effectively to utilize Water space, 200 familys can be cultivated in the pond of next 2 mu of the premise that nonoverload guarantee condition of water quality is excellent again, substantially increases the scale of breeding. Adopt miniflow water to survey type of rearing, it is ensured that the water quality in net cage is pure and fresh, reduce mesh blocking, and also the wheel animalcule outside net cage can be brought back in net cage, it is ensured that the bait supply that juvenile crab is sufficient. And the mode of flowing water makes the water in whole pond be in the state flowed all the time, it is ensured that the homogeneity of each family juvenile crab nurturing an environment, environmental deviation is less, inherited genetic factors is highlighted, comparability between each family increases, and the accuracy of selection increases, and Breeding progress is accelerated.

Accompanying drawing illustrates:

Fig. 1 is the overall schematic of the present invention

Fig. 2 is net cage partial schematic diagram of the present invention

Wherein 1 is trestle, and 2 is cross bar, and 3 is net cage, and 301 is Net-cage frame, and 4 is main pipeline, and 5 is branch pipe(tube), and 501 for regulating valve, and 502 is apopore, and 6 is water pump.

Detailed description of the invention:

Below in conjunction with embodiment, the invention will be further described. First, select the native pond of 2��5 mu of sizes as cultivating pond, it is desirable to having independent culvert system, smooth at the bottom of pond, mud is thoroughly removed before using in pond. Secondly, parallel erection trestle 1 in pond, set up cross bar 2 between two bridges, net cage water-adding system is installed in trestle 2 side. Trestle Bridge 1 face width 1 meter, bridge is high 2 meters, spacing 1.2 meters, and cross bar 2 bar is from 1 meter. Net cage water-adding system includes water pump 6, main pipeline 4, branch pipe(tube) 5 and adjustment valve 501, branch pipe(tube) 5 can go deep into lower 1 meter of net cage internal water, branch pipe(tube) 5 end blocks, on underwater portion tube wall, interval 10cm opens 1 and irises out water hole 502 from top to bottom, aperture 2mm, often 8 holes of circle, respectively iris out orientation, water hole 502 and stagger. 3rd, juvenile crab cultivation water processes. Plant first 20 days ponds of Eriocheir sinensis row children and enter sea water, water inlet is through 150 mesh sieve tulle bag filtrations, the depth of water 1.8 meters, planting the front 15 Tianchi water of Eriocheir sinensis row children uses tea seed cakes, bleaching powder to sterilize successively, plant Eriocheir sinensis row children first 10 days inoculation post-directed training Chaetoceros and chlorellas in pond, make water transparence reach 20cm��30cm. 4th, net cage 3 is suspended on cross bar 2, plants after Eriocheir sinensis loads product Seedling cage and put into row children in net cage 3, row children removes the product Seedling cage equipped with kind of Eriocheir sinensis after terminating. Net cage 3 is pentahedron structure, is fabricated to 80 mesh sieve tulles, and bottom surface is the square of the length of side 1 meter, high 1.5 meters, top-open, and net cage 3 is fixed on the rigidity Net-cage frame 301 that the materials such as reinforcing bar are made, and makes bolting silk net tighten open and flat. 5th, micro-running water technology juvenile crab, until growing up to megalops larva. Control valve makes each net cage 3 can add 1m3 water in every 12 hours. Throwing something and feeding in net cage 3 every day fresh and alive wheel animalcule, maintain wheel animalcule density in net cage 3 and be not less than 500/L, the outside wheel animalcule density of net cage 3 is not less than 100/L. Finally, whole pond water body treatment, each net cage 3 individually drags for Seedling and puts in a suitable place to breed, and juvenile crab is cultivated and terminates. Part that the present invention does not relate to is all same as the prior art maybe can adopt prior art to be realized.

Claims

1. a crab extensive family juvenile crab miniflow network of rivers case breeding method, is characterized in that comprising the following steps: first, selects the native pond of 2��5 mu of sizes as cultivating pond, it is desirable to having independent culvert system, smooth at the bottom of pond, mud is thoroughly removed before using in pond; Secondly, parallel erection trestle in pond, set up cross bar between two bridges, net cage water-adding system is installed in trestle side; 3rd, juvenile crab cultivation water processes; 4th, net cage is suspended on cross bar, plants after Eriocheir sinensis loads product Seedling cage and put into row children in net cage, row children removes the product Seedling cage equipped with kind of Eriocheir sinensis after terminating; 5th, micro-running water technology juvenile crab, until growing up to megalops larva; Finally, whole pond water body treatment, each net cage individually drags for Seedling and puts in a suitable place to breed, and juvenile crab is cultivated and terminates.

2. method according to claim 1, it is characterised in that: described trestle, bridge floor is wide 1 meter, and bridge is high 2 meters, and trestle spacing 1.2 meters in pond be arranged in parallel, sets up cross bar between two bridges, and bar is from 1 meter.

3. method according to claim 1, it is characterised in that: described net cage is pentahedron structure, is fabricated to 80 mesh sieve tulles, bottom surface is the square of the length of side 1 meter, high 1.5 meters, top-open, net cage is fixed in the rigid backbone that the materials such as reinforcing bar are made, and makes bolting silk net tighten open and flat.

4. method according to claim 1, it is characterised in that: described net cage hangs quantity 1000 square meter pond less than 200.

5. method according to claim 1, it is characterized in that: described net cage water-adding system includes water pump, main pipeline, branch pipe(tube) and adjustment valve, branch pipe(tube) can go deep into lower 1 meter of net cage internal water, branch pipe(tube) end blocks, and on underwater portion tube wall, interval 10cm opens 1 and irises out water hole, aperture 2mm from top to bottom, often 8 holes of circle, respectively iris out orientation, water hole and stagger.

6. method according to claim 1, it is characterized in that: it is that sea water is entered in kind of first 20 days ponds of Eriocheir sinensis row children that described water processes, water inlet is through 150 mesh sieve tulle bag filtrations, the depth of water 1.8 meters, planting the front 15 Tianchi water of Eriocheir sinensis row children uses tea seed cakes, bleaching powder to sterilize successively, plant Eriocheir sinensis row children first 10 days inoculation post-directed training Chaetoceros and chlorellas in pond, make water transparence reach 20cm��30cm.

7. method according to claim 1, it is characterized in that: described micro-running water technology juvenile crab is that control valve makes each net cage can add 1m3 water in every 12 hours, throw something and feed in net cage every day fresh and alive wheel animalcule, maintaining wheel animalcule density in net cage and be not less than 500/L, the outside wheel animalcule density of net cage is not less than 100/L.

8. method according to claim 1, it is characterised in that: described whole pond water body treatment is by repeatedly discharging sea water in pond, add equivalent fresh water mode carry out, each displacement less than 20cm, every 12 hours 1 time.