CN1729765A - A kind of intertidal shellfish juvenile mollusk intermediate rearing method and device thereof of being used for - Google Patents

Abstract

A kind of intertidal shellfish juvenile mollusk intermediate rearing device that is used for, it is a kind of tubular type breeding arrangement, its main body is the cultivation pipe that two ends are provided with one deck bolting silk net, cultivating the suitable for reading of pipe is connected with outer hoop, tulle in order to fixing sieve suitable for reading, end opening and the current tuner of cultivating pipe fuse, and the fixing end opening bolting silk net of cultivating pipe, constitute said juvenile mollusk intermediate rearing device thus.Advantages such as carrying out intertidal shellfish juvenile mollusk intermediate rearing with apparatus of the present invention, is that a kind of no sand, continuous-flow type are cultivated, and has the efficient of cultivation height, and the juvenile mollusk survival rate is grown soon up to more than 90%, and easy and simple to handle, cost is low, and labour intensity is little.

Description

A kind of intertidal shellfish juvenile mollusk intermediate rearing method and device thereof of being used for

Technical field

The marine products intertidal shellfish seed that the present invention relates to aquaculture produces specifically a kind of improvement technology of intertidal shellfish juvenile mollusk intermediate rearing method.

Background technology

China is mariculture big country, and shellfish culture is dominate in whole mariculture industry, and wherein the output of intertidal shellfish accounts for 20% of China's mariculture gross yield.About 200,000,000 mu of China's existing tidal-flat area area, its availability is at present less than 20%, and the development space of intertidal shellfish aquaculture is very big.Beach imbedded and perched shellfish such as quahog, clam, Ruditapes philippinarum, clam, Mactra quadrangularis, Chinese clam, Coelomactra antiquata and cockle have important economic value, and natural resources amount and cultured output are all very considerable.Above-mentioned shellfish delicious flavour, nutritious, at home and abroad market is all in very great demand.In recent ten years, because excessive adopting caught, the natural resources of some intertidal shellfishs (as clam and Ruditapes philippinarum) sharply reduces, and artificial breeding more and more is subject to people's attention.The seedling raising manners major part of intertidal shellfish is to adopt semi and seedling rearing in earth ponds at present, this dual mode seedling cost is lower, but efficient is lower, the factorial seedling growth mode is because the efficient height, more and more be subject to people's attention, wherein the factorial seedling growth of clam, Ruditapes philippinarum and quahog has been listed country " 863 " plan in.In intertidal shellfish factorial seedling growth process, the juvenile mollusk intermediate rearing is a key technology.Existing result of study shows, if being moved on to the field, the intertidal shellfish juvenile mollusk of the long 300-1000 μ of shell m carries out intermediate rearing, juvenile mollusk survival rate very low (being lower than 10%), if carry out intermediate rearing and the intertidal shellfish juvenile mollusk more than the long 2mm of shell is moved on to the field, the juvenile mollusk survival rate can increase substantially (can reach more than 70%).

Summary of the invention

The object of the present invention is to provide a kind of new intertidal shellfish juvenile mollusk intermediate rearing device, and the method for carrying out intertidal shellfish juvenile mollusk intermediate rearing with this device.

For achieving the above object, the present invention has designed a kind of tubular type breeding arrangement especially.As shown in Figure 1, this device main body manages 2 for cultivation, at the suitable for reading and end opening of cultivating pipe one deck bolting silk net 6,7 is housed respectively, cultivates the suitable for reading of pipe and binds round 1 outward with bayonet joint, in order to gravity flow screen tulle 6 with one; The end opening of cultivating pipe is suitable for reading with bayonet joint with current tuner 3, and bolting silk net 7 be fixed on cultivate manage end opening and current tuner suitable for reading between; A water inlet 8 is arranged on the sidewall of current tuner, link to each other, so constitute a complete tubular type breeding arrangement with water inlet pipe 9 and control valve 5.

An important feature of the present invention is that said cultivation pipe is a kind of U-PVC pipe, can certainly use other materials to do and cultivate pipe, but must seawater corrosion resistance.The diameter of this cultivation pipe is 90-110mm, and height is about 200-1000mm, and that can guarantee like this that juvenile mollusk can be not too much is flushed to by current on the top sieve tulle 6 of cultivating pipe, thereby is unlikely to influence flow rate of water flow.

Another important feature of the present invention is provided with a current tuner below cultivating pipe, current are with the water inlet vertical inlet of tuner side, can guarantee to cultivate the hydraulic pressure basically identical that the each several part of pipe lower end bears like this, all can constantly be flushed to by water thereby guarantee to cultivate the interior juvenile mollusk of pipe, juvenile mollusk is unlikely to long-time the accumulation and death in the pipe.

The method of carrying out intertidal shellfish juvenile mollusk intermediate rearing with the tubular type breeding arrangement of the present invention design is that a kind of no sand flow water planting is educated method, and cultivating in the middle of the juvenile mollusk is to carry out in a tubular type breeding arrangement, and its cultivating technique comprises following key step:

(1) choose juvenile mollusk that shell reaches 300-1000 μ m and put into and cultivate pipe, it cultivates density is ten thousand of 50-200; Select according to juvenile mollusk specification difference;

(2) regulate water flow velocity in 50-500ml/ second;

(3) regulate water temperature, salinity and pH values according to different intertidal shellfishs, select usually water temperature at 10-35 ℃, salinity at 10-45, pH value is at 6.0-8.0;

(4) cultivate when above and finish when the juvenile mollusk class reaches 2mm, move on to the field and carry out intermediate rearing.

The present invention compared with prior art has more following advantage:

1. the present invention is easy and simple to handle, and cost is low.The present invention binds round at home and abroad, between U-PVC pipe and the current tuner be connect in the socket joint mode as a whole, between do not stick with glue knot, convenient disassembly; Material therefor is plastic material among the present invention except that bolting silk, is not subjected to seawater corrosion, and is durable in use.

2. it is higher to utilize the present invention to cultivate efficient, can cultivate ten thousand of juvenile mollusk 50-200 in the general barrel.

3. utilize the present invention to carry out intertidal shellfish juvenile mollusk intermediate rearing, juvenile mollusk survival rate height can reach more than 90%.

4. the present invention is applicable to temperature and the salinity condition that various intertidal shellfish juvenile mollusk intermediate rearings are required.

Description of drawings

Fig. 1 is an intertidal shellfish juvenile mollusk intermediate rearing apparatus structure schematic diagram of the present invention.

Among the figure, 1 is outer hoop, and 2 for cultivating pipe, and 3 be the current tuner, and 4 be supporting plate, and 5 is control valve, and 6 is the top sieve tulle, 7 be under the bolting silk steel, 8 is water inlet, 9 is water inlet pipe.

Embodiment

Below the invention will be further described with embodiment again, provides some implementation details of the present invention.

Diameter is that the outer hoop 1 of 90-110mm, cultivation pipe 2 and the current tuner 3 of U-PVC connect into an integral body in the socket joint mode, and the suitable for reading and end opening of cultivating pipe is equipped with one deck bolting silk net.Cultivation is managed the outer hoop of bolting silk net utilization suitable for reading and is fixed, and cultivates the bolting silk net of managing end opening and is then fixed by the last interface connection of current tuner.The water inlet of current tuner vertically enters tuner, and warp bolting silk net 7 down enters the cultivation pipe, and the juvenile mollusk of placing in the stirring cultivation pipe carries out juvenile mollusk to be cultivated, and flowing water process top sieve tulle 6 is gone out by the overflow suitable for reading of outer hoop.

Below in conjunction with marine products intertidal shellfish quahog, clam, Ruditapes philippinarum and the several exemplary embodiments of clam the present invention is described in further detail, but the present invention not merely is confined in following examples.

Embodiment 1

Described intertidal shellfish is a quahog; Outer hoop diameter is 90mm, and bolting silk is 60 orders, and U-PVC pipe diameter is 90mm, highly is 600mm, and current tuner diameter is 90*50mm, and the PVC plate thickness is 3mm, and valve is Ф 50mm.

The quahog juvenile mollusk of the long 930 μ m of average shell is put into this facility carry out intermediate rearing.Experiment condition is: water temperature: 23-27 ℃, and salinity: 30-33, pH value: 7.6-7.8.Cultivate the effect comparative result in the quahog juvenile mollusk intermediate rearing process and see Table 1.

Cultivate the effect comparative result in the table 1 quahog juvenile mollusk intermediate rearing process

Classification		Survival rate (%)	Growth rate (μ m/d)
				Open-air		5.4	45
This facility	500,000/barrel	96	33
				1,000,000/barrel	96	33
	1,500,000/barrel	95	31
				2,000,000/barrel	97	25

Embodiment 2

Difference from Example 1 is:

Described intertidal shellfish is a clam; Bolting silk is 80 orders; The long 790 μ m of the average shell of juvenile mollusk.Experiment condition is: water temperature: 23-26 ℃, and salinity: 28-30, pH value: 7.6-7.8.Cultivate the effect comparative result in the clam juvenile mollusk intermediate rearing process and see Table 2.

Cultivate the effect comparative result in the table 2 clam juvenile mollusk intermediate rearing process

Classification		Survival rate (%)	Growth rate (μ m/d)
				Open-air		8.7	24
This facility	500,000/barrel	94	19
				1,000,000/barrel	92	20
	2,000,000/barrel	95	17

Embodiment 3

Difference from Example 1 is:

Described intertidal shellfish is a Ruditapes philippinarum, and binding round diameter outward is 110mm, and U-PVC pipe diameter is 110mm, and current tuner diameter is 110*50mm; The long 980 μ m of the average shell of juvenile mollusk.Experiment condition is: water temperature: 23-29 ℃, and salinity: 30-32, pH value: 7.6-7.8.Cultivate the effect comparative result in the Ruditapes philippinarum juvenile mollusk intermediate rearing process and see Table 3.

Cultivate the effect comparative result in the table 3 Ruditapes philippinarum juvenile mollusk intermediate rearing process

Classification		Survival rate (%)	Growth rate (μ m/d)
				Open-air		4.3	32
This facility	1,000,000/barrel	97	33
				1,500,000/barrel	95	34
	2,000,000/barrel	99	22

Embodiment 4

Difference from Example 1 is:

Described intertidal shellfish is a clam, and binding round diameter outward is 110mm, and bolting silk is 80 orders, and U-PVC pipe diameter is 110mm, and current tuner diameter is 110*50mm, the long 750 μ m of the average shell of juvenile mollusk.Experiment condition is: water temperature: 23-29 ℃, and salinity: 27-30, pH value: 7.6-7.8.Cultivate the effect comparative result in the clam juvenile mollusk intermediate rearing process and see Table 4.

Cultivate the effect comparative result in the table 4 clam juvenile mollusk intermediate rearing process

Classification		Survival rate (%)	Growth rate (μ m/d)
				Open-air		9.5	40
This facility	500,000/barrel	92	39
				1,000,000/barrel	93	35
	1,500,000/barrel	91	36
				2,000,000/barrel	93	30

In a word, the designed intermediate rearing facility effect in intertidal shellfish juvenile mollusk intermediate rearing process of the present invention is remarkable, can effectively improve efficient and juvenile mollusk survival rate that intertidal shellfish seeds such as quahog, clam, Ruditapes philippinarum, clam produce.

Apparatus of the present invention also can be used for the juvenile mollusk intermediate rearing of intertidal shellfishs such as Mactra quadrangularis, Chinese clam, Coelomactra antiquata and cockle.

Claims (4)

1, a kind of intertidal shellfish juvenile mollusk intermediate rearing device that is used for, it is characterized in that it being a kind of tubular type breeding arrangement, this device main body is for cultivating pipe (2), at the suitable for reading and end opening of cultivating pipe one deck bolting silk net (6), (7) are housed respectively, cultivate the suitable for reading of pipe and bind round (1) outward with bayonet joint with one, in order to gravity flow screen tulle (6), the end opening of cultivating pipe is suitable for reading with bayonet joint with current tuner (3), and bolting silk net (7) be fixed on cultivate manage end opening and current tuner suitable for reading between; A water inlet (8) is arranged on the sidewall of current tuner, link to each other with water inlet pipe (9) and control valve (5).

2, according to the described a kind of intertidal shellfish juvenile mollusk intermediate rearing device that is used for of claim 1, it is characterized in that said cultivation pipe is a kind of U-PVC pipe, its diameter is 90-110mm, highly is 200-1000mm.

3, according to the described a kind of intertidal shellfish juvenile mollusk intermediate rearing device that is used for of claim 1, it is characterized in that said bolting silk mesh is the 20-200 order.

4, with the described a kind of method that is used for intertidal shellfish juvenile mollusk intermediate rearing device of claim 1, it is characterized in that this cultivating technique is that a kind of no sand flow water planting is educated method, the intermediate rearing of juvenile mollusk is to carry out in a tubular type breeding arrangement, and its cultivating technique comprises following key step:

(1) choose juvenile mollusk shell that shell reaches 300-1000 μ m and put into and cultivate pipe, it cultivates density is ten thousand of 50-200;

(2) regulate water flow velocity in 50-500ml/ second;

(3) regulate water temperature, salinity and pH values according to different intertidal shellfishs, select usually water temperature at 10-35 ℃, salinity at 10-45, pH value is at 6.0-8.0;

(4) finish when the juvenile mollusk class reaches to cultivate more than the 2mm, move on to the field and carry out intermediate rearing.

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