CN212232685U

CN212232685U - Scallop seedling middle culture device

Info

Publication number: CN212232685U
Application number: CN202021151501.7U
Authority: CN
Inventors: 刘志刚; 刘晓坤; 罗泽鑫; 吴加莹; 曹楚畑; 张元�; 苏晓盈; 姚高友; 潘铧康
Original assignee: Guangdong Ocean University
Current assignee: Guangdong Ocean University
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2020-12-29
Anticipated expiration: 2030-06-19

Abstract

The utility model discloses a scallop seedling middle culture device and application thereof, which comprises a mesh bag and a middle culture device body, wherein the mesh bag and a separation net are respectively provided with three different meshes of 60 meshes, 40 meshes and 20 meshes; the middle culture device body consists of 4 plastic sieve bodies, 4 separation nets with different meshes, 2 dropping bottles and 6 spacers; this well ware of banking up with earth simple structure, convenient operation, inner space is big, and bearing shellfish is young area is big, has reduced the scallop because of crowded mechanical damage that overlaps and cause, and the survival rate reaches 76.0%, and the thick survival rate of conventional pocket mark is only 27.8%, and this internal rivers permeability of banking up with earth ware box is good, and the shellfish can obtain sufficient foodstuff and oxygen, is showing the growth rate who has improved the shellfish fast and the degree of consistency, and to eating the material fast, consume oxygen big, the quick scallop of growing is a ware of banking up with earth in the scallop seedling.

Description

Scallop seedling middle culture device

Technical Field

The utility model relates to a shellfish intermediate culture ware (for short "well bank of earth ware") technical field, concretely relates to ware is banked up with earth in scallop seedling and application thereof.

Background

The scallop belongs to the phyla of mollusca and the family of scallops, and is an important shellfish culture variety in China. The main nutrient component of the edible part of the scallop is protein, which is similar to fishes and shrimps and is an important aquatic food integrating food, medicine and nourishing, and the scallop is widely distributed in various sea areas in the world. The shells are also called sea fan clams and are mostly in a disc shape or a circular sector shape; the front and back of the top of the shell are provided with ears which are equal or unequal, and the lower parts of the front ears of most right shells are provided with obvious byssus holes and sley combs. The shell is provided with radial ribs or concentric flaky sculptures. The closed shell muscle mark is obvious, the outer sleeve mark is simple, and no water pipe exists; the inner ligament is positioned in the triangular ligament groove below the top of the shell. More than 50 species have been found along the sea in China. The scallop is an important cultured shellfish in coastal areas of China, the yield is high, the economic value is high, and a dry product of scallop meat is called 'dried scallop', and is a rare seafood.

The bottleneck problems of low survival rate, low growth speed and the like during the intermediate culture of the scallops always troubles the industrialized development of the scallops, the reasons are related to culture technology and culture environment, the intermediate culture tools are unreasonable, and the significance of researching the intermediate culture device with high survival rate and growth speed is great. Therefore, the research of the key technology of intermediate culture of scallops is necessary, the original traditional scallop seedling culture device is formed by serially connecting small mesh bags with built-in supporting rods, the internal space is small, the mechanical damage of scallop seedlings caused by crowding and overlapping is large, the survival rate and the growth speed are greatly reduced, the operation is inconvenient, and the research of the novel scallop seedling culture device is urgent.

SUMMERY OF THE UTILITY MODEL

The defect that exists to the above-mentioned prior art, the utility model aims to provide a cultivate ware in scallop seedling and use thereof, cultivate the scallop seedling through this cultivate ware, inner space is big, and bearing shellfish seedling area is big, the inside rivers permeability of box is good, can show the growth rate and the survival rate of mentioning the scallop seedling, and the scallop that to eating the material fast, consume oxygen big, grow fast is the ware of cultivating in the scallop seedling of an ideal, has structure product simple structure, convenient operation's characteristics.

In order to achieve the above object, the utility model adopts the following technical scheme:

a scallop seedling middle culture device comprises a mesh bag and a middle culture device body;

the mesh bag is of a mesh bag-shaped structure, is arranged on the outer side of the middle culture device body and wraps the middle culture device body;

the middle culture device body comprises at least 1 screen body, at least 1 separation net, a plurality of dropping bottles and a plurality of spacers, wherein the adjacent screen bodies are connected through the embedding of the spacers, the separation net is arranged in other screen bodies except the bottommost screen body, and the dropping bottles are symmetrically arranged at the inner side of the bottom of the bottommost screen body through clamping pieces.

Preferably, the well ware body of banking up with earth include 4 screen frames, 3 separate net, 2 weigh down bottle and 6 spacers, 4 screen frames are all connected through the spacer by last first screen frame, second screen frame, third screen frame and the fourth screen frame that includes the same structure in proper order under to, between the adjacent screen frame, separate the net setting at the lower diapire and the inside wall of first screen frame, second screen frame and third screen frame, weigh down the bottle and pass through the fastener symmetry and install inboard in fourth screen frame bottom.

Preferably, the screen body is of a table-shaped structure with a large upper part and a small lower part, and a plurality of screen holes with the same size are uniformly arranged on the side wall and the bottom of the screen body.

Preferably, the mesh bags comprise 20-mesh, 40-mesh and 60-mesh bags, which are formed by sewing mesh rubber wire mesh cloth, the middle culture device body is tightly sleeved inside the mesh bags, and the bottom shapes of the mesh bags are the same as the periphery and the bottom shapes of the screen body; the separation net comprises 20-mesh, 40-mesh and 60-mesh separation nets, which are all made of small net bags, have the same shape as the screen body, are wide at the upper part and narrow at the lower part, are sleeved on the bottom surface and the side wall of the outer side of the screen body, the sleeving height of the separation net on the screen body is 2/3 of the height of the screen body, and the separation net is sleeved with a contraction rope to be contracted; the upper opening end part of the mesh bag is provided with a circle of sleeve sewing barrel, the diameter of each sleeve sewing barrel is larger than that of the corresponding rubber wire rope, and the rubber wire rope is allowed to pass through; and a circle of sleeve sewing barrels are also arranged around the upper opening end of the small mesh bag to allow the telescopic rope to pass through, and after the small mesh bag is sleeved with the screen body, the telescopic rope is contracted.

Preferably, the spacer comprises a first inclined partition plate, a second inclined partition plate, a horizontal partition plate, a supporting baffle plate and a vertical baffle plate, the first inclined partition plate and the second inclined partition plate are symmetrically arranged on the horizontal partition plate, the second inclined partition plate is arranged at the left end part and the right end part of the horizontal partition plate, one end of the supporting baffle plate is connected with the second inclined partition plate, the other end of the supporting baffle plate is connected with the vertical baffle plate, and a trapezoidal clamping groove used for clamping the upper edge of the lower-layer screen body is formed below the supporting baffle plate; and a trapezoidal groove used for clamping the bottom of the lower end of the upper screen body is formed between the two first inclined partition plates which are symmetrically arranged.

Preferably, the first inclined partition plate and the second inclined partition plate are uniformly provided with clamping bulges matched with the sieve pores, and the contact surfaces of the clamping bulges and the sieve pores are arc-shaped surfaces; and the first inclined partition plate, the second inclined partition plate and the horizontal partition plate are provided with flow guide holes with the same size as the sieve holes.

Preferably, the clamping piece comprises a clamping part, a connecting part, a mounting part and a connecting pin, the clamping part is arranged at the left end of the clamping piece and is connected with the mounting part through the connecting part, the clamping part comprises an arc-shaped clamping groove and a connecting plate, the connecting plate is symmetrically arranged at the outer end opening part of the arc-shaped clamping groove, an included angle is formed between the connecting plate and the tangent line of the arc-shaped clamping groove, and the symmetrically arranged connecting plate is matched with the elastic rubber band for use; the installation department is the platelike structure of slope, and inclination is the same with the inclination of screen frame bottom lateral wall, just the installation department includes the same first slope curb plate and the second slope curb plate of structure, and first slope curb plate and second slope curb plate all correspond and are provided with the connecting hole, pass the sieve mesh with the connecting pin and are connected with the connecting hole.

Preferably, the falling bottle is of an M-shaped tubular structure matched with the arc-shaped clamping groove, the bottle caps are symmetrically arranged at the upper end of the falling bottle, the falling bottle is symmetrically arranged at the short edge position of the inner side of the bottom of the fourth sieve body through the clamping piece, and the volume of the falling bottle is 450-550 ml.

Preferably, the volume of the sieve body is as follows: 35cm long by 45cm high by 20cm high; the volume of the middle culture device body is as follows: width 35cm x length 45cm x height 74 cm.

The utility model has the advantages that: the utility model discloses a bank up ware in scallop seedling and use thereof, compare with prior art, the utility model discloses an improvement part lies in:

(1) the utility model designs a brand-new scallop seedling middle culture device, which has the advantages of simple product structure, convenient operation, large internal space and large area of the bearing scallop seedlings, reduces the mechanical damage of the scallop seedlings caused by crowding and overlapping, and obviously improves the survival rate of the scallop seedlings; the survival rate of the scallop seedlings marked with the coarse mark by the medium culture device reaches 76.0 percent, while the survival rate of the scallop seedlings marked with the coarse mark by the conventional mesh bag is only 27.8 percent;

(2) the permeability of water flow in the box body of the medium culture device is good, the shellfish seedlings obtain sufficient food and oxygen, the growth speed of the shellfish seedlings is obviously improved, and the medium culture device is an ideal medium culture device for scallop seedlings with fast feeding, high oxygen consumption and fast growth;

(3) the permeability is good, the glue silk screen cloth in the screen body is sewn and adhered to the bottom and the periphery by the glue silk, the height of the screen cloth at the periphery is 2/3 of the screen body, the upper part of the screen body is left empty to increase the permeability of seawater, the screen cloth at the lowest layer does not need to be sewn and adhered, and the screen cloth is replaced by the screen cloth at the bottom of a special mesh bag to increase the permeability of the lowest layer;

(4) meanwhile, based on the scallop seedling midbandaging device, a three-stage midbandaging method for scallop seedlings is designed, the survival rate of the cultivated scallop seedlings is improved by 182.2 percent compared with that of the conventional mesh bag cultivation, the specification of the seedlings at the end of each stage is obviously larger than that of the conventional mesh bag, the seedling individuals are larger than the conventional mesh bag by 18.2 percent when the last stage is ended, and the variation coefficient of the length of the cultivated scallop shells is reduced by 23.99 percent compared with that of the conventional mesh bag.

Drawings

Fig. 1 is an overall front view of the scallop seedling middle culture device of the utility model.

Fig. 2 is a left side view of the whole culture device for scallop seedlings of the utility model.

Fig. 3 is a top view of the whole culture device for scallop seedlings of the present invention.

Fig. 4 is a front view of the first sieve body of the scallop seedling middle cultivating device of the utility model.

Fig. 5 is a side view of the first sieve body of the scallop seedling middle cultivating device of the utility model.

Fig. 6 is a top view of the first sieve body of the scallop seedling medium culture device of the utility model.

Fig. 7 is a schematic structural view of the separator of the culture device in scallop seedlings of the utility model.

Fig. 8 is a schematic structural view of the fastener of the scallop seedling middle culture device of the present invention.

Fig. 9 is a schematic structural view of the pendant bottle of the culture device for scallop seedlings of the utility model.

Fig. 10 is a schematic structural view of the scallop seedling middle culture device after the bottle and the fastener are engaged.

Wherein: 1. the screen comprises a screen body, 11, a first screen body, 12, a second screen body, 13, a third screen body, 14, a fourth screen body, 15 screen holes, 2, a separation net, 3, a net bag, 4, a drop bottle, 41, a bottle cap, 5, a separation sheet, 51, a first inclined partition plate, 52, a second inclined partition plate, 53, a horizontal partition plate, 54, a supporting baffle plate, 55, a vertical baffle plate, 56, a clamping protrusion, 57, a flow guide hole, 6, a clamping piece, 61, a clamping part, 611, an arc clamping groove, 612, a connecting plate, 62, a connecting part, 63, a mounting part, 631, a first inclined side plate, 632, a second inclined side plate, 633, a connecting hole, 64, a connecting pin, and an included angle between tangents of the connecting plate and the arc clamping groove.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.

Referring to the attached drawings 1-10, a scallop seedling mid-culture device and the application thereof are disclosed, the scallop seedling mid-culture device comprises a mesh bag 3 and a mid-culture device body; the mesh bag 3 is a specially-made mesh bag-shaped structure, is arranged on the outer side of the middle culture device body and wraps the middle culture device body; the middle culture device body comprises at least 1 screen body 1, at least 1 screen net 2, a plurality of dropping bottles 4 and a plurality of spacers 5, all connect through 5 gomphosis of spacers between the adjacent screen bodies, separate net 2 and set up in other screen bodies except the bottommost screen body, dropping bottles 4 and passing through 6 symmetries of fastener and installing in the bottom of the bottommost screen body is inboard.

The middle culture device body comprises 4

plastic screen bodies

1, 3

separation nets

2, 2 dropping bottles 4 and 6 partition plates 5, wherein the 4 screen bodies 1 sequentially comprise a first screen body 11, a second screen body 12, a third screen body 13 and a fourth screen body 14 which are identical in structure from top to bottom, the adjacent screen bodies are connected through the partition plates 5, the separation nets 2 are arranged in the first screen body 11, the second screen body 12 and the third screen body 13, and the dropping bottles 4 are symmetrically arranged on the inner side of the bottom of the fourth screen body 14 through clamping pieces 6; the screen frame 1 is big-end-up's platform shape structure, evenly is provided with a plurality of sieve meshes 15 that the size is the same at the lateral wall of screen frame 1 and bottom to increase the sea water permeability, accelerate rivers and pass through, increase the shellfish and strain the food, breathe and accelerate the waste discharge of excreting, promote the shellfish to grow.

The mesh bags 3 comprise mesh bags of 20 meshes, 40 meshes and 60 meshes, and are formed by sewing mesh rubber wire mesh fabrics, a middle culture device body is tightly sleeved inside the mesh bags 3, the bottom shapes of the mesh bags 3 are the same as the shapes of the periphery and the bottom of the screen body 1 and are used for tightly supporting the plastic screen body at the bottommost layer, the width of the mesh bags 3 is specifically based on the standard that the mesh bags 3 can be horizontally tightly attached to the screen body 1 and sleeved into the plastic screen body 1, the height of the mesh bags 3 is based on the standard that the bag openings can be fastened after 4 layers of plastic screen bodies 1 are sleeved, a circle of sleeve sewing cylinders are arranged around the upper opening ends of the mesh bags 3, the diameter of each sleeve sewing cylinder is 6-8mm, and a rubber wire rope with the diameter of 5-6mm is allowed to; the separation net 2 comprises separation nets of 20 meshes, 40 meshes and 60 meshes, and is made of small net bags, the small net bags are the same as the screen body 1 in shape, wide at the top and narrow at the bottom and are sleeved on the bottom surface and the side wall of the outer side of the screen body 1, the sleeving height of the separation net 2 on the screen body 1 is 2/3 of the height of the screen body, the upper part is left empty to increase the permeability of seawater, accelerate the passing of water flow, increase the filtering and breathing of the spat and accelerate the discharge of excretion waste, promote the growth of the spat, a circle of sleeve sewing cylinder is arranged around the upper end of each small net bag to allow the telescopic rope to pass through,

after the small mesh bag is sleeved with the screen body 1, the contraction rope is contracted, wherein the screen body 1 at the bottommost layer is not required to be provided with the separation net 2, and the separation net 2 is replaced by mesh cloth at the bottom of a special mesh bag 3 so as to increase the permeability of the bottommost layer, which is a characteristic of the middle culture device; when the scallop seedling culturing device is used, the mesh of the special mesh bag 3 is the same as that of the separation net 2 in the seam pasting sieve body 1, so that the circulation effect of water flow inside and outside the culturing device is ensured to reach the optimal state, and the problem of water flow retention is avoided.

In order to connect two plastic screens adjacent to each other up and down, the upper screen is embedded on the surface of the lower screen, two plastic transverse spacers 5 are arranged between the two screens 1 adjacent up and down to support the upper screen, the spacers 5 comprise a first inclined partition 51, a second inclined partition 52, a horizontal partition 53, a supporting baffle 54 and a vertical baffle 55, the first inclined partition 51 and the second inclined partition 52 are symmetrically arranged on the horizontal partition 53, the second inclined partition 52 is arranged at the left end and the right end of the horizontal partition 53, one end of the supporting baffle 54 is connected with the top of the second inclined partition 52, the other end is connected with the vertical baffle 55, and a trapezoidal clamping groove for clamping the upper edge of the lower screen is formed below the supporting baffle 54; and the inclination angles of the first inclined partition plate 51 and the second inclined partition plate 52 are equal, and the inclination angles are the same as the inclination angles of the sides of the screen body, so that the permeability of seawater is ensured, the height of the first inclined partition plate 51 is not greater than that of the second inclined partition plate 52, and a trapezoidal groove used for clamping the bottom of the lower end of the upper screen body is formed between the two symmetrically arranged first inclined partition plates 51. The first inclined partition plate 51 and the second inclined partition plate 52 are uniformly provided with clamping bulges 56 matched with the sieve pores 15, when the sieve is used, the clamping bulges 56 are clamped into the sieve pores 15, the clamping stability is improved, and the contact surfaces of the clamping bulges 56 and the sieve pores 15 are arc-shaped surfaces, so that the clamping bulges 56 can be prevented from scratching the separation net 2 on the side wall of the bottom of the sieve body; the first inclined partition plate 51, the second inclined partition plate 52 and the horizontal partition plate 53 are respectively provided with a flow guide hole 57 with the same size as the sieve holes 15, so that seawater permeability is increased, water flow is accelerated to pass through, shellfish feeding and respiration are increased, excretion waste discharge is accelerated, and shellfish growth is promoted;

in order to increase the stability of the middle culture device and reduce the swing in water, two dropping bottles 4 are symmetrically arranged on the left side wall and the right side wall of the inner side of the bottom of the fourth sieve body 14 through clamping pieces 6, the dropping bottles are filled with substances with density higher than that of water, such as preferable sand, and meanwhile, in order to increase the specific weight of the bottles, after the dropping bottles are filled with the sand, the dropping bottles are filled with water to expel air in gaps among the sand, so that the quality of the sand bottles is increased, and the dropping bottles 4 are symmetrically arranged at the short side positions of the inner side of the fourth sieve body 14;

the clamping piece 6 comprises a clamping part 61, a connecting part 62, a mounting part 63 and a connecting pin 64, the clamping part 61 is arranged at the left end of the clamping piece 6 and is connected with the mounting part 63 through the connecting part 62, the clamping part 61 comprises an arc-shaped clamping groove 611 and a connecting plate 612, the connecting plate 612 is arranged at the outer end opening part of the arc-shaped clamping groove 611, an included angle a exists between the connecting plate 612 and the tangent line of the arc-shaped clamping groove 611, the symmetrically arranged connecting plates 612 are matched with elastic rubber bands for use, and when the drop bottle 4 is clamped into the arc-shaped clamping groove 611, the elastic rubber bands are sleeved and tied in the two included angles a to fix the drop bottle 4; the mounting part 63 is an inclined plate-shaped structure, the inclination angle of the mounting part is the same as that of the left and right side walls at the bottom end of the bottommost screen body 1, the mounting part 63 comprises a first inclined side plate 631 and a second inclined side plate 632 which are the same in structure, the first inclined side plate 631 and the second inclined side plate 632 are correspondingly provided with connecting holes 633 matched with the connecting pins 64 for use, and when the first inclined side plate 631 and the second inclined side plate 632 are connected by using the connecting pins 64, in order to avoid damaging the bottom of the bottommost screen body 1, gaskets are arranged on the opposite surfaces of the first inclined side plate 631 and the second inclined side plate 632 to increase the contact;

the dropping bottle 4 is of an M-shaped tubular structure matched with the arc-shaped clamping groove 611, the bottle caps 41 are symmetrically arranged at the upper end of the dropping bottle 4, the dropping bottle 4 is symmetrically arranged on the left side wall and the right side wall of the inner side of the bottom of the fourth sieve body 14, and the volume of the dropping bottle 4 is 550ml, and in the embodiment, the dropping bottle 4 is designed into the M-shaped tubular structure, so that the attachment area of the scallop can be increased, and the scallop culture is facilitated; preferably, the clamping piece 6 is an M-shaped tubular structure, substances with density higher than that of water, such as sand, can be inserted into the bottle through the bottle cap 41, the stability of the medium culture device is improved, the swing in water is reduced, and the volume of the drop bottle 4 is preferably 500 ml; the M shape of the drop bottle 4 can be formed by splicing a plurality of plastic pipes with the same diameter, and the drop bottle 4 can also be made into other shapes, so that the two purposes of increasing the stability of the medium culture device and increasing the attachment area of the scallops can be achieved.

Preferably, the drop bottle 4 is made of plastic material, and has a length of 25-35cm, preferably 30cm, and a diameter of 10 cm;

preferably, the volume of the screen body 1 is: 35cm long by 45cm high by 20cm high; the volume of the middle culture device body is as follows: the width is 35cm, the length is 45cm, the height is 74cm, and the tabling depth of the two sieve bodies 1 which are adjacent up and down is 2 cm.

The use process of the scallop seedling culture device comprises the following steps:

example 1

Will banket up ware cultivation process in the scallop and traditional pocket cultivation process contrast, concrete operation as follows:

(1) seedling preparation: 11, 30 days in 2017, transferring the scallop purple ink hybrid breeding seedlings (specification: the shell length is 1-1.5mm, and about 800-;

(2) medium culture equipment: two middle culture devices are adopted for comparison, including a novel middle culture device and a traditional middle culture mesh bag;

specification of the medium culture device: the width is 35cm, the length is 45cm, the height is 74cm, the sieve is formed by overlapping 4 built-in plastic sieves and accessories thereof, and the specification of the plastic sieves is 35cm, 45cm, the height is 20 cm.

The specification of the traditional mesh bag is as follows: the width is 35cm and the length is 45 cm;

(3) the middle culture method comprises the following steps: the three-stage medium culture method is adopted, and comprises the following steps:

first-stage intermediate cultivation: starting from 11 months and 30 days, the two medium culture devices are both made of 60-mesh net cloth, and the seedling density of the novel medium culture device is 2.5 ten thousand grains/layer multiplied by 4 layers/box which is 10 ten thousand grains/box; the seedling density of the traditional medium culture mesh bag is 0.5 ten thousand grains per bag; the seedling feeding amount of the novel medium culture device 1 box is equivalent to that of a traditional mesh bag of 20 bags; the former 1 case is 1 and hangs, the latter 20 pocket ligatures become 1 and hang. The hanging density of the two middle culture devices on the floater rope extending raft cable is 1.0 m/hanging.

And (3) after 12 months and 15 days, pouring out the spat when the spat grows to the length of the shell of about 5mm, and performing secondary medium culture:

second-stage medium cultivation: starting in 12 months and 15 days, carrying out thinning cultivation; the two medium culture devices are all 40 meshes of mesh cloth, and the seedling density of the novel medium culture device is 0.75 ten thousand grains/layer multiplied by 4 layers/box which is 3 ten thousand grains/box; the seedling density of the traditional medium culture mesh bag is 0.15 ten thousand grains per bag;

and (3) after 5 days after 1 month, pouring out the spat when the spat grows to about 10mm of shell length, and performing three-stage intermediate culture:

③ three-stage intermediate cultivation: starting from 1 month and 5 days, carrying out thinning cultivation; the two medium culture devices adopt 20-mesh screen cloth, and the seedling density of the novel medium culture device is 0.25 ten thousand grains/layer multiplied by 4 layers/box which is 1 ten thousand grains/box; the seedling density of the traditional medium culture mesh bag is 0.05 ten thousand grains per bag; 1, 30 days after the shellfish seedlings grow to be about 15mm long, pouring out the shellfish seedlings, and dredging the shellfish seedlings to enter a net cage for cultivation;

(4) medium culture period management: the surfaces of the mesh bags of the two medium culture devices are washed every 3 days, so that floating mud is prevented from blocking meshes, smooth water flow in the mesh bags is ensured, and the growth of the shellfish seedlings is promoted; timely replacing the damaged mesh bag; paying attention to the safety of the floating raft for medium culture; and when the intermediate stage culture is finished, measuring the size of the spat, counting the survival rate, and timely separating and dredging the spat to enter the next intermediate stage culture.

(5) The medium culture effects of the two medium culture devices are compared: as shown in tables 1 and 2 below:

TABLE 1 comparison of the cultivation results in two cultivation devices

TABLE 2 novel medium culture device improvement rate

As can be seen from the above tables 1 and 2, the novel middle culture device is significantly superior to the traditional mesh bag in the aspects of survival rate, seedling growth speed, seedling uniformity and the like, and is specifically shown in the following steps:

firstly, in three-stage medium culture, the survival rate of each stage of medium culture of the novel medium culture device is obviously greater than that of the traditional mesh bag, especially in one-stage medium culture; after two months of medium culture, the total survival rate of the novel medium culture device is 76.2 percent, the traditional mesh bag is only 27.0 percent, and the former is improved by 182.2 percent compared with the latter;

secondly, in the three-stage medium culture, the specification of the seedlings at the end of each stage of the novel medium culture device is obviously larger than that of the traditional mesh bag, after the two-month medium culture, the specification of the seedlings reaches 16.2mm, the traditional mesh bag is only 13.7mm, the former is improved by 18.2 percent compared with the latter, and the growth speed of the former is obviously larger than that of the latter;

thirdly, after the three-stage medium culture is finished, the seedling shell length variation coefficient cultured by the novel medium culture device is 3.77 percent and is obviously less than 4.69 percent of that of the traditional mesh bag, and the variation coefficient of the seedling shell length is reduced by 23.99 percent compared with that of the seedling shell length variation coefficient of the traditional mesh bag.

The reason why the novel medium culture device is superior to the traditional mesh bag is that:

4 interlayers in the novel middle culture device are all horizontal planes, the adhesion of the spats is uniform, the space between the spats is large, the accumulation phenomenon cannot occur, and bait and oxygen uniformly flow around each spat, so that the spat growth speed is high, the individual uniformity is good, and the survival rate is high; traditional mesh bag shellfish seedlings are seriously accumulated at the bottom of the bag, the space between the shellfish seedlings is small, bait and oxygen competition is formed, the growth speed is slow, the individual uniformity is poor, and even anoxic death occurs.

Example 2:

(1) seedling preparation: 11, 20 days in 2018, transferring the Argopecten irradians fingerlings (the specification: the shell length is 1-1.5mm, and about 800-;

(2) medium culture equipment: two middle culture devices are adopted for comparison, including a novel middle culture device and a traditional middle culture mesh bag:

primary medium cultivation: starting from 20 days in 11 months, the two medium culture devices are both made of 60-mesh net cloth, and the seedling density of the novel medium culture device is 2.5 ten thousand grains/layer multiplied by 4 layers/box which is 10 ten thousand grains/box; the seedling density of the traditional medium culture mesh bag is 0.5 ten thousand grains per bag. The seedling feeding amount of the novel medium culture device 1 box is equivalent to that of a traditional mesh bag of 20 bags; the former 1 case is 1 and hangs, the latter 20 pocket ligatures become 1 and hang. The hanging density of the two middle culture devices on the floater rope extending raft cable is 1.0 m/hanging;

and (5 days after 12 months, when the spat grows to the length of the shell of about 5mm, pouring the spat out, and performing secondary medium culture:

secondary medium cultivation: starting at 12 months and 5 days, the cultivation was carried out separately. The two medium culture devices are all 40 meshes of mesh cloth, and the seedling density of the novel medium culture device is 0.75 ten thousand grains/layer multiplied by 4 layers/box which is 3 ten thousand grains/box; the seedling density of the traditional medium culture mesh bag is 0.15 ten thousand grains per bag;

and (3) 12 months and 25 days, pouring out the spat when the spat grows to the length of the shell of about 10mm, and performing three-stage middle culture:

three-stage medium culture: starting at 25 days 12 months, the cultivation was conducted in separate thinning. The two medium culture devices adopt 20-mesh screen cloth, and the seedling density of the novel medium culture device is 0.25 ten thousand grains/layer multiplied by 4 layers/box which is 1 ten thousand grains/box; the seedling density of the traditional medium culture mesh bag is 0.05 ten thousand grains per bag. And (4) after 1 month and 20 days, pouring out the spat when the spat grows to the length of the shell of about 15mm, and separately dredging the spat and entering a net cage for cultivation.

(4) Medium culture period management: the surfaces of the mesh bags of the two medium culture devices are washed every 3 days, so that floating mud is prevented from blocking meshes, smooth water flow in the mesh bags is ensured, and the growth of the shellfish seedlings is promoted; timely replacing the damaged mesh bag; paying attention to the safety of the floating raft for medium culture; when the intermediate stage culture is finished, measuring the size of the spat, counting the survival rate, and timely dredging the spat to enter the next stage intermediate stage culture;

(5) obtaining the comparison of the culture effect of two culture devices: as shown in tables 3 and 4:

TABLE 3 comparison of cultivation results in two cultivation devices

TABLE 4 novel medium culture device improvement rate

From above-mentioned table 3, 4 can see, cultivate the ware in novel in all showing the aspect such as survival rate, seedling growth rate, seedling degree of consistency and being superior to traditional pocket, further explain the utility model discloses an cultivate the superiority of ware in scallop seedling.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A device for culturing scallop seedlings is characterized in that: comprises a mesh bag (3) and a cultivator body;

the mesh bag (3) is of a mesh bag-shaped structure, is arranged on the outer side of the middle culture device body and wraps the middle culture device body;

the middle culture device body comprises at least 1 screen body (1), at least 1 separation net (2), a plurality of dropping bottles (4) and a plurality of spacers (5), wherein the adjacent screen bodies are connected through the embedding of the spacers (5), the separation net (2) is arranged in other screen bodies except the bottommost screen body, and the dropping bottles (4) are symmetrically arranged at the inner side of the bottom of the bottommost screen body through clamping pieces (6).

2. The scallop seedling cultivator of claim 1, which is characterized in that: well ware body of banking up with earth include 4 screen frames (1), 3 separate net (2), 2 fall bottle (4) and 6 spacer (5), 4 first screen frame (11), second screen frame (12), third screen frame (13) and fourth screen frame (14) that the structure is the same are all connected through spacer (5) by last first screen frame (11), second screen frame (12), third screen frame (13) and the fourth screen frame (14) of including in proper order under to in 4 screen frames (1), separate that net (2) set up the wall and the inside wall of going to the bottom at first screen frame (11), second screen frame (12) and third screen frame (13), fall bottle (4) and install inboard in fourth screen frame (14) bottom through fastener (6) symmetry.

3. The scallop seedling cultivator of claim 2, which is characterized in that: the screen body (1) is of a table-shaped structure with a large upper part and a small lower part, and a plurality of screen holes (15) with the same size are uniformly arranged on the side wall and the bottom of the screen body (1).

4. The scallop seedling cultivator of claim 2, which is characterized in that: the mesh bags (3) comprise mesh bags of 20 meshes, 40 meshes and 60 meshes, which are formed by sewing mesh rubber silk mesh fabrics, the middle culture device body is tightly sleeved inside the mesh bags (3), and the bottom shapes of the mesh bags (3) are the same as the shapes of the periphery and the bottom of the screen body (1); the separation net (2) comprises separation nets of 20 meshes, 40 meshes and 60 meshes, and is made of small net bags, the small net bags are the same as the screen body (1), wide at the top and narrow at the bottom and are sleeved on the bottom surface and the side wall of the outer side of the screen body (1), the sleeving height of the separation net (2) on the screen body (1) is 2/3 of the height of the screen body, and shrinkage ropes are sleeved for shrinkage; the upper opening end part of the mesh bag (3) is provided with a circle of sleeve sewing barrel, the diameter of the sleeve sewing barrel is larger than that of the corresponding rubber wire rope, and the rubber wire rope is allowed to pass through; the periphery of the upper opening end of the small mesh bag is also provided with a circle of sleeve sewing barrels for allowing the telescopic rope to pass through, and after the small mesh bag is sleeved with the screen body (1), the telescopic rope is contracted.

5. The scallop seedling cultivator of claim 3, which is characterized in that: the spacer (5) comprises a first inclined partition plate (51), a second inclined partition plate (52), a horizontal partition plate (53), a supporting baffle plate (54) and a vertical baffle plate (55), the first inclined partition plate (51) and the second inclined partition plate (52) are symmetrically arranged on the horizontal partition plate (53), the second inclined partition plate (52) is arranged at the left end part and the right end part of the horizontal partition plate (53), one end of the supporting baffle plate (54) is connected with the second inclined partition plate (52), the other end of the supporting baffle plate is connected with the vertical baffle plate (55), and a trapezoidal clamping groove used for clamping an upper edge of a lower-layer screen body is formed below the supporting baffle plate (54); and a trapezoidal groove used for clamping the bottom of the lower end of the upper screen body is formed between the two first inclined partition plates (51) which are symmetrically arranged.

6. The scallop seedling cultivator of claim 5, which is characterized in that: clamping bulges (56) matched with the sieve holes (15) are uniformly arranged on the first inclined partition plate (51) and the second inclined partition plate (52), and the contact surfaces of the clamping bulges (56) and the sieve holes (15) are arc-shaped surfaces; the first inclined partition plate (51), the second inclined partition plate (52) and the horizontal partition plate (53) are all provided with diversion holes (57) with the same size as the sieve holes (15).

7. The scallop seedling cultivator of claim 3, which is characterized in that: the clamping piece (6) comprises a clamping part (61), a connecting part (62), an installation part (63) and a connecting pin (64), the clamping part (61) is arranged at the left end of the clamping piece (6) and is connected with the installation part (63) through the connecting part (62), the clamping part (61) comprises an arc-shaped clamping groove (611) and a connecting plate (612), the connecting plate (612) is symmetrically arranged at the outer end opening part of the arc-shaped clamping groove (611), an included angle is formed between the connecting plate (612) and the tangent line of the arc-shaped clamping groove (611), and the symmetrically arranged connecting plate (612) is matched with the elastic rubber band for use; installation department (63) are the platelike structure of slope, and inclination is the same with the inclination of screen frame bottom lateral wall, just installation department (63) are provided with connecting hole (633) including the same first slope curb plate (631) of structure and second slope curb plate (632), first slope curb plate (631) and second slope curb plate (632) all correspond, pass sieve mesh (15) with connecting pin (64) and are connected with connecting hole (633).

8. The scallop seedling cultivator of claim 7, which is characterized in that: the dropping bottle (4) is of an M-shaped tubular structure matched with the arc clamping groove (611), the bottle caps (41) are symmetrically arranged at the upper end of the dropping bottle (4), the dropping bottle (4) is symmetrically arranged at the short side position of the inner side of the bottom of the fourth sieve body (14) through the clamping piece (6), and the volume of the dropping bottle is 450-.

9. The scallop seedling cultivator as claimed in any one of claims 1 to 8, wherein: the volume of the screen body (1) is as follows: the width is 35cm, the length is 45cm, and the height is 20 cm; the volume of the middle culture device body is as follows: width 35cm x length 45cm x height 74 cm.