CN204426348U - A kind of ecologic breeding mixing net cage - Google Patents

Abstract

The utility model relates to a breeding net cage, in particular to an ecological breeding mixed net cage. The mixed net cage is composed of a shellfish breeding net cage and a fish breeding net cage. The periphery of the shellfish breeding net cage is composed of stainless steel pipes A prism whose cross-section is a regular octagon. The fish culture net cage is a stainless steel cuboid frame, the fish culture net cage is fixed in the center of the shellfish culture cage, and two cables protrude from each of the four vertices of the fish culture cage in the longitudinal direction and the transverse direction. , the other end of the cable is respectively fixed to the two vertices of the corresponding fish breeding net cage. The ecological breeding mixed net cage realizes the ecological breeding of shellfish, fish and algae, and the shellfish can use the residual bait of fish, excrement and algae above it as food, preventing the residual bait and other high phosphorus and nitrogen substances from causing damage. The phenomenon of eutrophication of water body occurs; algae plants can purify the quality of the surrounding water body, and the nutrients in the water can promote the growth of algae.

Description

A kind of ecological breeding mixed net cage

technical field

The utility model relates to a breeding cage, in particular to an ecological breeding mixed cage.

Background technique

In recent decades, the rapid development of mariculture industry has brought great negative impact on the environment. According to surveys, about 85% of the phosphorus, 80%-88% of the carbon, and 52%-95% of the nitrogen in the feed put into the fish farming system are given by the unfinished fish food, the excretion and respiration of the fish. The environment, organic or inorganic input of such fish feed, has had a substantial impact on the organic matter and nutrients in the water, which may cause eutrophication; intensive farming of fish, shrimp, shellfish or other economical aquatic animals not only leads to Increasing nutrient concentrations in coastal waters lead to changes in dissolved inorganic nutrient structures and depositional environments, and may negatively affect downstream biomes.

The formation of water eutrophication is mainly affected by factors such as nutrients, dissolved oxygen, air temperature, light, hydrodynamic force and sediment. Among them, the increase of nutrients is the root cause; dissolved oxygen, air temperature and light will affect the growth of algae, causing changes in the type and quantity of algae; when the water body flows slowly, the diffusion of nutrients will be hindered, so that nutrients will be accumulated and also Suitable hydraulic conditions are given to those algae that are more suitable for slow-flowing water bodies; there is a dynamic balance between the dissolution and deposition of nutrients between the water body and its bottom sediments, and after exogenous nutrients enter the water body, they are deposited through physical, chemical and biological actions In the bottom mud, when the nutrient content of the water body drops to a certain limit, the nutrients in the bottom mud will be released into the water body again, which will intensify the eutrophication of the water body.

In order to prevent and control the eutrophication of water bodies, the treatment methods currently used can be divided into physical, chemical and biological methods. Physical method refers to the method of direct treatment by dredging, dredging, pollution saving and emission reduction and other physical means. These methods are relatively direct and effective, but large-scale dredging projects are huge and require a lot of money, and the excavated sediment and algae are difficult to safely dispose of. The chemical method refers to the method of adsorbing organic matter and algae in the sedimentation water by adding chemical agents, or killing algae. These methods need to add a large amount of chemical agents, which are costly. At the same time, the chemical agents added are toxic or difficult to decompose, which are easy to damage the offshore ecosystem and damage the marine environment for a long time. When starting to use biological methods, people try to use microorganisms, planktonic Purify water bodies such as plants and carrion-eating fish. However, in the process of using clean animals to purify water, the animals themselves will also metabolize and produce metabolites, which will increase the load on the ecological environment of marine water bodies. Although phytoplankton can absorb a large amount of nutrients, it is difficult to control the population of phytoplankton, and it is difficult to effectively separate phytoplankton.

Compared with other cleaning organisms, macroalgae, as the most widely used organisms for the treatment of aquaculture wastewater and marine ecological restoration at this stage, have many unique advantages. Biofiltration studies of G. caudata showed that macroalgae can significantly reduce nutrients, removing approximately 59.5% of NH4 ⁺ -N, 49.6% of NO3 ^- -N and 12.3% of PO4 ^3- -P within 4 hours.

Contents of the invention

The technical problem to be solved by the utility model is to provide a kind of ecological breeding mixed net cage, which can mix shellfish, fish and algae, which is not only beneficial to the growth of algae, but also can purify the water body and improve the marine environment. Improve the utilization rate of bait, improve the ability to resist wind volume, and reduce costs.

The purpose of the present invention can be achieved through the following technical solutions:

An ecological breeding mixed net cage is characterized in that: the mixed net cage is composed of a shellfish culture net cage and a fish culture net cage,

The shellfish culture net cage is a prism composed of stainless steel pipes, and its cross section is a regular octagon. There are peripheral nets around, top and bottom of the shellfish culture net cage. The aperture of the peripheral net is 2.0-2.5mm. cm; buoys are provided on the pipe fittings on the upper end surface of the shellfish culture net cage;

The fish culture net cage is a stainless steel cuboid frame, the fish culture net cage is fixed in the center of the shellfish culture net cage, and two cables protrude from each of the four vertices of the fish culture net cage vertically and horizontally. , the other end of the cable is respectively fixed to the two vertices of the corresponding fish culture cage;

The frame of the upper end surface of the fish breeding net cage is provided with a bait net bag, and the bait net bag extends inward; an inner net is surrounded on the four sides, the top and the bottom of the cuboid frame, and the aperture of the inner net is 1.0 mm. -1.5cm, the fish breeding net cage has economic fish;

Algae plants are planted on the top peripheral net between the fish culture net cage and the shellfish culture net cage;

A sling or a hanging cage is fixed on the cable; filter-feeding shellfish are cultivated on the sling or in the hanging cage; the shellfish can use residual bait, excrement of fish and algae plants above them as food, and the algae plants It can purify the quality of the surrounding water body, and the nutrients in the water can promote the growth of algae.

The eight corners of the shellfish culture cage and the four corners of the fish culture cage are respectively provided with a fixed pile, and the fixed pile is vertically erected on the seabed.

Wherein, the side length of the shellfish culture net cage is 18-20m, and the side length of the fish culture net cage is 8-10m. The appropriate size ratio of the two cages makes it able to resist the blow of wind and waves well, especially in the summer when typhoons are prevalent, reducing economic losses.

Wherein, the filter-feeding shellfish is scallop, oyster or mussel; the economic fish is American red croaker, large yellow croaker or small yellow croaker.

Wherein, the aperture of the bait net bag is 1.0-1.5cm. The bait can be put in the pocket, and the bait will fall slowly through the action of gravity, so that the fish can fully eat and improve the utilization rate of the bait.

The algal plant is laver, asparagus or Gracilaria chrysanthemum.

Compared with the prior art, the utility model has the advantages of:

1. The ecological breeding mixed net cage realizes the ecological cultivation of shellfish, fish and algae, and the shellfish can use residual bait, excrement of fish and algae plants above as food, preventing high phosphorus and nitrogen pollution such as residual bait. Substances cause eutrophication of the water body; algae plants can purify the quality of the surrounding water body, and the nutrients in the water can promote the growth of algae.

2. The mixed net cage for ecological breeding has a strong ability to resist wind and waves, and can flexibly combine the number, shape and layout of the whole net cage according to the actual sea area conditions, and has strong adaptability.

3. The setting of the bait net bag, when feeding, the bait is placed on the net bag, and the bait slowly descends through the action of gravity, which improves the bait utilization rate and reduces the cost.

Description of drawings

Fig. 1 is the top view schematic diagram of the utility model purple ecological breeding mixed net cage.

Fig. 2 is a schematic top view of the non-peripheral net and the inner net of Fig. 1 .

Fig. 3 is a schematic cross-sectional view in the direction of A-A in Fig. 2, wherein the shellfish is cultured in hanging cages.

Fig. 4 is a schematic cross-sectional view in the direction of A-A in Fig. 2, wherein the shellfish is cultured by hanging ropes.

Fig. 5 is a schematic top view of two mixed cages for ecological breeding.

Fig. 6 is a schematic top view of the non-peripheral net and the inner net of Fig. 5 .

In the figure: 1. shellfish culture net cage, 2. fish culture net cage, 3. outer net, 4. inner net, 5. cable, 6. bait net bag, 7. algae plant, 8. sling, 9 . cage, 10. buoy.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Fig. 1-Fig. 6, a kind of ecological breeding mixed net cage is characterized in that: this mixed net cage is made up of shellfish culture net cage 1 and fish culture net cage 2,

Described shellfish culture net cage 1 is the prism body that stainless steel pipe forms, and its cross-section is regular octagon, and its side length is 20m, is all surrounded with peripheral net 3 around, top and bottom around shellfish culture net cage 1, The aperture of the peripheral net 3 is 2.0-2.5cm; buoys 10 are provided on the pipe fittings on the upper end surface of the shellfish culture cage 1;

Described fish breeding cage 2 is a stainless steel cuboid frame, and its side length is 10m. Described fish culture net cage 2 is fixed on the center of shellfish culture net cage 1, and the longitudinal direction and the transverse direction of four apex places of this fish culture net cage 2 stretch out two cables 5 respectively, and the other end of this cable 5 respectively Fixed with the two vertices of the corresponding fish culture net cage 2;

The frame of the upper end surface of the fish breeding net cage 2 is provided with a bait net pocket 6, which extends inwardly, and its aperture is 1.0-1.5cm; Seine 4, the aperture of the inner seine is 1.0-1.5cm, and American red croaker, large yellow croaker or small yellow croaker are cultivated in the fish breeding net cage 2;

Algae plants 7, such as seaweed, asparagus or Gracilaria chrysanthemum, are planted on the top peripheral net 3 between the fish culture cage 2 and the shellfish culture cage 1;

A suspension rope 8 or a hanging cage 9 is fixed on the cable 5; oysters can be cultivated on the suspension rope 8, and scallops can be cultivated in the suspension cage 9;

The eight corners of the shellfish culture cage 1 and the four corners of the fish culture cage 2 are respectively provided with a fixed pile, and the fixed pile is vertically erected on the seabed.

The basic principles and main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned implementation regulations. What is described in the above-mentioned implementation regulations and the description is only used to illustrate the principle of the utility model, without departing from the principle and scope of the utility model. , the utility model can also have various changes and improvements, and these changes and improvements all belong to the scope of the claimed utility model.

The scope of protection required by the utility model is defined with the appended claims and other equivalents.

Claims (5)

1. an ecologic breeding mixing net cage, is characterized in that: this mixing net cage is made up of shellfish culture net cage (1) and fish culture net cage (2),

The prism that described shellfish culture net cage (1) forms for stainless-steel pipe, its cross section is octagon, surrounding in shellfish culture net cage (1), top and bottom are all with external network (3), and the aperture of this external network (3) is 2.0-2.5cm; The pipe fitting of the upper surface of described shellfish culture net cage (1) is provided with buoy (10);

Described fish culture net cage (2) is stainless steel cuboid framework, described fish culture net cage (2) is fixed on the central authorities of shellfish culture net cage (1), the vertical and horizontal at four summits place of this fish culture net cage (2) respectively stretch out two hawsers (5), and the other end of this hawser (5) is fixed with two summits of the fish culture net cage (2) of correspondence respectively;

The framework of the upper surface of described fish culture net cage (2) is provided with the bait string bag (6), and this bait string bag (6) extends internally; All be with interior purse seine (4) in the surrounding of this cuboid framework, top and bottom, the aperture of this interior purse seine is 1.0-1.5cm, and in this fish culture net cage (2), cultivation has economic fish;

Upper kind of top periphery net (3) between described fish culture net cage (2) and shellfish culture net cage (1) is implanted with algae (7);

Described hawser (5) is fixed with lifting rope (8) or cage (9); Cultivate on this lifting rope (8) or in cage (9) and have Filter feeding bivalves;

Eight drift angle places of described shellfish culture net cage (1) and four drift angle places of fish culture net cage (2) are respectively provided with a spud pile, and this spud pile stands vertically in seabed.

2. ecologic breeding mixing net cage according to claim 1, is characterized in that: the length of side of described shellfish culture net cage (1) is 18-20m, and the length of side of described fish culture net cage (2) is 8-10m.

3. ecologic breeding mixing net cage according to claim 1, is characterized in that: described Filter feeding bivalves is scallop, oyster or mussel; Described economic fish is Scioenops ocellatus, large yellow Crocker or little yellow croaker.

4. ecologic breeding mixing net cage according to claim 1, is characterized in that: the aperture of the described bait string bag (6) is 1.0-1.5cm.

5. ecologic breeding mixing net cage according to claim 1, is characterized in that: described algae (7) is laver, asparagus or Compositae weed.