Method and device for efficiently proliferating sepiella maindroni by combining grazing and raising

Abstract

The invention provides a method and a device for efficiently proliferating sepiella maindroni by combining grazing and raising, and belongs to the field of aquatic animal proliferation. An efficient breeding method for sepiella maindroni integrating grazing and breeding comprises the following steps that an appropriate sea area is selected, fertilized eggs are bred in a breeding facility laid in the downstream direction of a normal fish breeding net cage, namely an empty net cage containing an artificial floating reef, the periphery of the empty net cage is provided with an algae-mussel flow blocking ecological rope, and a cover net is arranged above the empty net cage; the newly hatched cuttlefish can stay in the proliferation facility empty net cage for a long time due to the characteristics of loving reefs and drilling the net and strong space awareness, and slowly escape into natural water after gradually adapting to the proliferation environment. According to the proliferation method, cuttlefishes gradually adapt to the natural environment of the sea area, meanwhile, cuttlefish larvae are well protected enough in the fragile incubation initial stage through protection measures such as net cages, and therefore the proliferation survival rate and the maintenance efficiency are improved, and efficient proliferation is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of aquaculture animal proliferation, and particularly relates to a method and device for efficient proliferation of Sepiella maindroni with integrated herding and farming. Background Art

[0002] Sepiella maindroni used to be one of the "four major marine products" in the East China Sea of China. Historically, the highest annual output in Zhejiang Province reached over 60,000 tons. However, due to long-term overfishing and the destruction of spawning grounds and habitats, etc., since the 1980s, the output of Sepiella maindroni in the coastal fishing grounds of Zhejiang has dropped sharply, and it has been unable to form a fishing season, and even once on the verge of extinction.

[0003] Artificial stocking is an important means to restore wild fishery resources. At the beginning of this century, with the continuous breakthrough of the artificial breeding technology of Sepiella maindroni, the economic and ecological benefits are very significant. However, compared with the historical highest record, the resource quantity of Sepiella maindroni in the current sea area has far from recovered to the highest level. The reasons are, in addition to the changes in natural habitats and environments, probably also related to the lack of an efficient Sepiella maindroni proliferation and stocking mode, and the overall poor proliferation and conservation effects. This is because the current proliferation and stocking of Sepiella maindroni follow the traditional fishery proliferation mode, that is, directly putting artificial fry or fertilized eggs into the natural sea area during the breeding season of Sepiella maindroni to achieve the purpose of compensating and repairing natural resources. For example, the patent with the patent number CN109757406B provides a method for proliferating Sepia esculenta fry, and directly putting the cultivated Sepiella maindroni larvae into the sea. However, since the artificial Sepiella maindroni fry and fertilized eggs mainly come from the artificial breeding environment, it is very difficult to ensure their survival and adaptation when directly putting these artificially cultivated fry that have adapted to the breeding conditions into the natural sea area with very different environments. Therefore, it is also impossible to guarantee the actual effect of this proliferation and stocking activity. In addition, some artificial Sepiella maindroni fry or fertilized eggs come from breeding parents that have been cultured for several generations. The several generations of artificial breeding may have caused some domestication characteristics in the artificial fry. There are significant differences in wild characteristics such as predation, enemy avoidance, and adaptability compared with the wild population. Therefore, it is even more impossible to guarantee the environmental adaptation and normal survival of the proliferated Sepiella maindroni fry.

[0004] Therefore, there is an urgent need to establish a step-by-step and gradually wild domestication proliferation and stocking mode, so that the artificial Sepiella maindroni fry can fully adapt to the environment of the proliferation sea area before escaping into the natural sea area, thereby ensuring the survival rate of the proliferated individuals and the actual effect of stocking. Currently, similar step-by-step and gradually wild domestication technical specifications have been widely applied in the stocking and natural population restoration of many mammals (such as giant pandas) and birds.

[0005] The present invention makes full use of the facility characteristics of sea - area cage culture and the surrounding bait environment conditions, and combines the behavioral characteristics of cuttlefish, such as their preference for drilling into cages and strong spatial awareness, to establish an efficient proliferation and release mode of integrated aquaculture and proliferation. Besides providing a protective environment and fattening conditions for proliferated individuals during the initial stage of proliferation (the most vulnerable period of cuttlefish), it also enables cuttlefish to be fully wild - domesticated before completely escaping into the natural sea area, gradually adapting them to the natural sea area conditions, thereby ensuring the environmental adaptability and proliferation survival rate of proliferated cuttlefish. Summary of the Invention

[0006] The purpose of the present invention is to provide an efficient proliferation method and device for Sepiella maindroni of integrated aquaculture and proliferation. Aiming at the prominent problems of low survival rate of cuttlefish proliferation and release and low conservation efficiency, a method of integrated aquaculture and proliferation of wild - domestication and efficient proliferation and release of Sepiella maindroni is established. By proliferating fertilized eggs in a proliferation facility (a proliferation empty cage with floating reefs inside) laid downstream of a normal fish - culture cage in the sea area, and setting up an algae - mussel flow - blocking ecological rope symbiotic system around the proliferation facility to form an annular proliferation area. After the fertilized eggs are naturally hatched, the newly hatched cuttlefish will stay in the proliferation empty cage of the proliferation facility for a long time due to their reef - loving and net - drilling characteristics and strong spatial awareness. After gradually adapting to the proliferation environment, they will slowly escape into the natural water body, enabling the artificially - bred cuttlefish fry to quickly adapt to the natural sea area environment conditions during the process of proliferation and release, and improving the proliferation survival rate and conservation efficiency of cuttlefish.

[0007] To achieve the above - mentioned purpose, the present invention adopts the following technical solutions: An efficient proliferation method for Sepiella maindroni of integrated aquaculture and proliferation, comprising the following steps: (1) Sea - area selection: Select a bay sea area with clear water, slow flow, and small - scale offshore cage culture, where the temperature is 14 - 30 °C, the salinity is 11.73 - 31.43, and the area is relatively rich in planktonic animals and plants. The offshore cage is a traditional fish seawater cage or a deep - water cage, which can carry out normal aquaculture activities; (2) Set up a proliferation empty cage with artificial floating reefs inside in the downstream direction of the water flow of a traditional fish seawater cage or a deep - water cage, and construct an algae - mussel flow - blocking ecological rope symbiotic system around the proliferation empty cage; (3) Load the artificially - bred cuttlefish fertilized eggs just produced into a cuttlefish proliferation cage, hang it deep into the proliferation empty cage, and carry out natural hatching.

[0008] The naturally - hatched cuttlefish larvae gather near the artificial floating reefs due to their strong reef - loving behavior, can move freely inside and outside the cage, live for 1 - 2 months, grow to a mantle length of 2 - 3 cm, and then leave the cage to achieve wild - domestication.

[0009] Preferably, in step (1), the sea - area selection is in the area below 30 - meter water depth contour line.

[0010] Preferably, in the step (1), the sea area is selected with a temperature of 22-28 °C and a salinity of 22.89-26.18.

[0011] Preferably, in the step (2), the algae is at least one of kelp and laver, preferably kelp.

[0012] The present invention also adopts another technical solution: An efficient proliferation device for Sepiella maindroni integrated with farming, comprising a proliferation cage 4, the proliferation cage 4 is placed inside a proliferation empty net cage 1, a cover net 2 is arranged on the top of the proliferation empty net cage 1, an artificial floating reef 3 is arranged inside, and an algae-mussel flow-blocking ecological rope 5 is arranged on the periphery. The upper half of the algae-mussel flow-blocking ecological rope 5 is provided with well-seeded algae 6, and the lower half is well-seeded mussels 7.

[0013] Preferably, the mesh diameter of the proliferation empty net cage 1 is 2-3 cm, the area is 6×6 meters, and the depth is 8-10 meters.

[0014] Preferably, the area of the artificial floating reef 3 is 2×2 meters, and the material is wood.

[0015] Preferably, the algae-mussel flow-blocking ecological rope 5 is 3 meters long, and the ratio of algae to mussels is 1:(1-1.5).

[0016] Preferably, an algae-mussel flow-blocking ecological rope 5 is placed every 0.4-1 meter on the periphery of the proliferation empty net cage 1, and each rope has 750-900 mussel seedlings with a mussel shell length of 0.3-0.6 cm.

[0017] Preferably, the proliferation cage 4 is hung into the proliferation empty net cage 1 at a depth of 3-4 meters, and an algae-mussel flow-blocking ecological rope 5 with well-seeded algae is arranged on the periphery of the proliferation cage 4.

[0018] Algae-mussel flow-blocking ropes are placed around the perimeter of empty breeding cages to block currents and moderately reduce seawater velocity, creating an adaptive environment for squid hatching. Once hatched, the squid can gradually adapt to the marine environment. Algae are placed on the upper half of the rope to partially block sunlight, creating a suitable environment for mussel growth. Furthermore, the weight of the mussels, placed in the middle and lower parts of the rope, acts as a pendant, keeping the flow-blocking rope relatively stable underwater. Furthermore, algae leaves, such as kelp, provide shelter and attachment points for squid, allowing them to avoid predators and rest in the sea. Kelp's photosynthesis increases oxygen levels in the water, facilitating their respiration. Furthermore, the growth of kelp absorbs nutrients from the water, reducing eutrophication. The filter-feeding action of the mussels reduces plankton and organic debris, improving water quality and promoting squid growth. Mussels can also serve as an opening bait for squid, providing them with a food source, and their shells can provide an attachment matrix for the squid to attach and grow in.

[0019] The proliferation activity is carried out in March and April during the breeding season of the needleless squid in natural sea areas.

[0020] Algae-mussel-encased ecological ropes are installed around the propagation cages to reduce the water velocity inside, creating a suitable environment for squid hatching. March and April are the breeding season for squid and other marine life. The changes in hydrodynamics and nutritional conditions caused by cage aquaculture activities lead to the accumulation of small fish, shrimp, and phytoplankton within the aquaculture cages and the empty propagation cages (as previously discovered). This provides excellent starter food for the newly hatched squid fry. The presence of the empty propagation cages also prevents potential predators from attacking the newly hatched squid larvae.

[0021] After three years of experiments, the inventors found that this integrated breeding and stocking method can allow squid to hatch normally, and the hatched squid larvae like to gather near artificial floating reefs due to their strong reef-loving behavior; and due to their strong spatial territorial awareness, they occupy the empty breeding cages for a long time, sometimes passing through the meshes of the empty breeding cages to shuttle in and out of the cages. At the same time, the rich bait accumulated in the cages also provides conditions for the rapid fattening of the squid; the hatched squid larvae can stay in the empty breeding cages for nearly two months, and many individuals only leave the cages when they grow to a carcass length of about 3 cm. At this time, the breeding squid have gradually adapted to the conditions of the breeding sea area in the relatively safe environment of the empty breeding cages, and as the individuals grow, their abilities such as predation, enemy avoidance, and stealth have become relatively strong. At this time, they can better adapt to the conditions of the natural sea area when they escape into the natural sea area and have a higher survival rate.

[0022] Therefore, the present invention has the following beneficial effects: (1) Through the design and layout of the proliferation device, the juvenile cuttlefish can stay in or near the proliferation facility for a relatively long time, protecting the newly hatched juvenile cuttlefish to the greatest extent. Through the long-term adaptation of the cuttlefish in or near the proliferation facility, the juvenile cuttlefish can be wildized and domesticated to the greatest extent, gradually adapting to the hydrological environment and predator conditions of the proliferation sea area. The bait enrichment effect brought by the herding and integration activities can also provide rich bait for the proliferating juvenile cuttlefish, enabling them to grow rapidly and improving their survival rate. (2) By constructing an algae-mussel symbiotic system, the algae-mussel flow-blocking ecological rope can reduce the underwater flow velocity, providing a suitable environment for the survival of cuttlefish, and improving their survival rate and proliferation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. is a schematic diagram of the overall structure of an efficient proliferation device for Sepiella maindroni with herding and integration.

[0024] Figure 2 FIG. is a schematic diagram of the proliferation cage.

[0025] In the figure: 1 - proliferation empty net cage, 2 - cover net, 3 - artificial reef, 4 - proliferation cage, 5 - algae-mussel flow-blocking ecological rope, 6 - algae, 7 - mussel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be further described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. Without departing from the spirit and scope of the inventive concept, changes and advantages that can be conceived by those skilled in the art are included in the present invention.

[0027] General Embodiment An efficient proliferation method for Sepiella maindroni with herding and integration includes the following steps: (1) Sea area selection: Select a bay sea area with clear water, slow flow, and small offshore cage farming, with a temperature of 14 - 30 °C, a salinity of 11.73 - 31.43, and a relatively rich area of planktonic animals and plants. The offshore cage is a traditional fish seawater cage or a deep-water cage, and normal farming activities can be carried out; (2) Set up a proliferation empty net cage with an artificial reef inside in the downstream direction of the water flow of the traditional fish seawater cage or the deep-water cage, and construct an algae-mussel flow-blocking ecological rope symbiotic system around the proliferation empty net cage; (3) Load the artificially bred cuttlefish fertilized eggs just produced into the cuttlefish proliferation cage, hang them deep in the proliferation empty net cage, and carry out natural hatching.

[0028] Since cuttlefish have a strong reef-loving behavior, the naturally hatched juvenile cuttlefish will gather near the artificial reef, can move freely inside and outside the net cage, live for 1 - 2 months, grow to a mantle length of 2 - 3 cm and leave the net cage, achieving wildization and domestication.

[0029] As a specific embodiment, in step (1), the sea area is selected in the area below the water isobath of 30 meters.

[0030] As a specific embodiment, in step (1), the sea area is selected with a temperature of 22 - 28 °C and a salinity of 22.89 - 26.18.

[0031] As a specific embodiment, in step (2), the algae is at least one of kelp and laver, preferably kelp.

[0032] An efficient proliferation device for Sepiella maindroni with integrated cultivation and ranching includes a proliferation cage 4, the proliferation cage 4 is placed inside a proliferation empty net cage 1, a cover net 2 is arranged on the top of the proliferation empty net cage 1, an artificial floating reef 3 is arranged inside, an algae - mussel flow - blocking ecological rope 5 is arranged on the periphery, the upper half of the algae - mussel flow - blocking ecological rope 5 is provided with algae 6 with seedlings wrapped, and the lower half is mussels 7 with seedlings wrapped.

[0033] As a specific embodiment, the mesh diameter of the proliferation empty net cage 1 is 2 - 3 cm, the area is 6×6 meters, and the depth is 8 - 10 meters.

[0034] As a specific embodiment, the area of the artificial floating reef 3 is 2×2 meters, and the material is wood.

[0035] As a specific embodiment, the length of the algae - mussel flow - blocking ecological rope 5 is 3 meters, and the ratio of algae to mussels is 1:(1 - 1.5).

[0036] As a specific embodiment, an algae - mussel flow - blocking ecological rope 5 is placed every 0.4 - 1 meter on the periphery of the proliferation empty net cage 1, and each rope has 750 - 900 mussel seedlings, and the shell length of the mussels is 0.3 - 0.6 cm.

[0037] As a specific embodiment, the proliferation cage 4 is hung into the proliferation empty net cage 1 at a depth of 3 - 4 meters, and an algae - mussel flow - blocking ecological rope 5 with seedlings wrapped is arranged on the periphery of the proliferation cage 4.

[0038] Cuttlefish have the habit of preferring to drill into cages and will drill into any underwater objects with a three-dimensional structure, such as empty fishing nets and fish reefs. At the same time, cuttlefish also have a strong sense of space and can identify the space they are in and occupy that space for a long time under suitable conditions. In the aquaculture cages in the natural sea area, it is often seen that small cuttlefish can actively drill into the empty breeding cages, thus occupying the empty breeding cages for a long time and fattening up in them. On the contrary, the aquaculture cages can provide stable growth and fattening conditions for cuttlefish. On the one hand, the aquaculture cages can block potential predators outside the cages, playing a role in protecting the proliferating individuals of cuttlefish; on the other hand, the uneaten feed debris due to daily feeding and other activities in the aquaculture cages can attract a lot of small fish, shrimps, phytoplankton and zooplankton, providing sufficient bait conditions for the proliferating individuals; at the same time, an algae-mussel flow-blocking ecological rope is set outside the aquaculture cages, which can effectively reduce the water flow velocity. Coupled with the unique hydrodynamic characteristics such as the resistance of the cages, the water flow velocity inside the cages is much lower than that outside the cages, also providing a relatively stable water environment for the proliferating individuals. Specific embodiments Embodiment 1 An efficient proliferation method for Sepiella maindroni integrating herding and aquaculture, comprising the following steps: (1) Sea area selection: Select a sea area located in a coastal bay. The area has clear water, slow currents, small-scale offshore cage aquaculture, the isobath is below 30 meters, the temperature is 25 °C, the salinity is 22.89, and there is rich phytoplankton and zooplankton, which is an ideal cuttlefish proliferation area; (2) Selection of aquaculture facilities: Use traditional fish seawater cages with a size of 10×10 meters and a depth of 12 meters, which can meet the normal aquaculture activities of fish. At the same time, an empty breeding cage is set in the downstream direction of the water flow of the traditional fish seawater cage. The empty breeding cage has a diameter of 2.5 meters, an area of 6×6 meters, and a cage depth of 9 meters; (3) Design of proliferation facilities: An efficient proliferation device for Sepiella maindroni integrating herding and aquaculture includes a proliferation cage 4. The proliferation cage 4 is placed inside the empty breeding cage 1. A cover net 2 is set on the top of the empty breeding cage 1, an artificial floating reef 3 is arranged inside, and an algae-mussel flow-blocking ecological rope 5 is set outside. The upper half of the algae-mussel flow-blocking ecological rope 5 is provided with algae 6 with seedlings wrapped, and the algae are laver, and the lower half is mussels 7 with seedlings wrapped. The device is as shown in Figure 1 、 Figure 2 shown. An artificial floating reef is set inside the empty breeding cage. The artificial floating reef has an area of 2×2 meters and its surface is attached with various algae, providing a habitat and foraging place for cuttlefish larvae. A cover net is set above the cage to prevent cuttlefish larvae from escaping and being preyed on by birds. A kelp-mussel seedling string is set outside the cage. A string of algae-mussel flow-blocking ecological ropes with seedlings wrapped is placed every 0.6 meters. Each string of mussels is 3 meters long, with 700 kelp seedlings and 750 mussel seedlings, and the shell length of the mussels is 0.5 cm; (4)Release of cuttlefish proliferation cages: The artificially bred cuttlefish fertilized eggs just produced are loaded into cuttlefish proliferation cages. The proliferation cages are cuboids with dimensions of 30×30×40 cm and a mesh size of 0.5 cm. 1000 fertilized eggs are placed in each proliferation cage, and a kelp - mussel flow - blocking ecological rope is set around it. One string is placed every 0.1 m and hung at a depth of 3 m in the empty proliferation net cage for natural hatching. The proliferation cage is as Figure 2 shown; (5)Proliferation process: The cuttlefish larvae hatched naturally gather near the artificial floating reefs due to their strong reef - loving behavior and can move freely inside and outside the net cage. After 1 month of growth, the cuttlefish larvae grow to a mantle length of 2 - 3 cm and leave the net cage to continue growing in the surrounding sea area.

[0040] Example 2 An efficient proliferation method for Sepiella maindroni integrating mariculture and ranching, comprising the following steps: (1)Sea area selection: Select a sea area located in a coastal bay. The area has clear water, slow currents, small - scale offshore cage farming, the isobaths are below 30 m, the temperature is 25°C, the salinity is 22.89, and there is a rich abundance of planktonic animals and plants, which is an ideal cuttlefish proliferation area; (2)Selection of aquaculture facilities: Deep - water cages are used, with dimensions of 10×10 m and a depth of 12 m, which can meet the normal aquaculture activities of fish. At the same time, empty proliferation net cages are set in the downstream direction of the water flow of the deep - water cages. The diameter of the empty proliferation net cage is 2.5 m, the area is 6×6 m, and the depth of the net cage is 9 m; (3)Design of proliferation facilities: The efficient proliferation device for Sepiella maindroni integrating mariculture and ranching includes a proliferation cage 4. The proliferation cage 4 is placed inside the empty proliferation net cage 1. A cover net 2 is set on the top of the empty proliferation net cage 1, an artificial floating reef 3 is arranged inside, and an algae - mussel flow - blocking ecological rope 5 is set around it. The upper half of the algae - mussel flow - blocking ecological rope 5 is provided with algae 6 with seedlings wrapped, and the algae is laver, and the lower half is mussels 7 with seedlings wrapped. The device is as Figure 1 、 Figure 2 shown. An artificial floating reef is set inside the empty proliferation net cage. The area of the artificial floating reef is 2×2 m, and various algae are attached to the surface, providing a habitat and foraging place for cuttlefish larvae. A cover net is set above the net cage to prevent cuttlefish larvae from escaping and being preyed on by birds. Laver - mussel seedling strings are set around the net cage. One string of laver - mussel flow - blocking ecological rope with seedlings wrapped is placed every 0.6 m. Each string of mussels is 3 m long, with 720 laver seedlings and 750 mussel seedlings, and the shell length of the mussels is 0.5 cm; (4) Placement of squid breeding cages: Place the newly produced artificially bred squid fertilized eggs into squid breeding cages. The breeding cages are rectangular, with dimensions of 30×30×40 cm and a mesh size of 0.5 cm. 1,000 fertilized eggs are placed in each breeding cage. A seaweed-mussel flow-blocking ecological rope is set up around the cage, with a string placed every 0.1 m. The rope is then hung 3 meters deep into the empty breeding cage for natural hatching. Figure 2 As shown; (5) Proliferation process: Naturally hatched squid larvae gather near artificial reefs due to their strong reef-loving behavior and can move freely inside and outside the cages. After one month of growth, the squid larvae grow to a body length of 2-3 cm and leave the cages to continue growing in the surrounding sea areas.

[0041] Comparative Example 1 A method for efficiently multiplying squid by integrating animal husbandry and breeding, comprising the following steps: (1) Sea area selection: Select a sea area located in a coastal harbor with clear water, slow current, small offshore cage culture, depth contour below 30 meters, temperature of 25℃, salinity of 22.89, and abundant phytoplankton, which is an ideal squid proliferation area; (2) Selection of aquaculture facilities: Use traditional fish seawater cages with a size of 10×10 meters and a depth of 12 meters, which can meet the needs of normal fish aquaculture activities. At the same time, set up empty breeding cages in the downstream direction of the traditional fish seawater cages. The diameter of the breeding cages is 2.5 meters, the area is 6×6 meters, and the depth is 9 meters. (3) Design of proliferation facilities: No cover net is set above the cage, and the rest is the same as in Example 1; (4) Placement of squid propagation cages: Place freshly laid artificially bred squid fertilized eggs into squid propagation cages. The propagation cages are rectangular and measure 20 × 20 × 40 cm. 1,000 fertilized eggs are placed in each propagation cage and hung 3 meters deep in an empty propagation cage for natural hatching.

[0042] The difference between this comparative example and Example 1 is that no cover net is provided above the net cage, and the other conditions are the same as those in Example 1.

[0043] Comparative Example 2 The difference between this comparative example and Example 1 is that no artificial floating reef is set inside the cage, and the other conditions are the same as those in Example 1.

[0044] Comparative Example 3 The difference between this comparative example and Example 1 is that no algae-mussel flow-blocking ecological rope is set on the periphery of the cage, and the other conditions are the same as those in Example 1.

[0045] Survival and hatchability monitoring During the proliferation process, the survival rate of cuttlefish larvae was monitored regularly. Survival rate statistics: The hatching rate of cuttlefish fertilized eggs and the survival rate of cuttlefish larvae were counted; The formula for calculating the hatching rate is: Hatching rate (%) = (Number of hatched larvae / Total number of fertilized eggs) × 100%; The formula for calculating the survival rate is: Survival rate (%) = (Number of surviving larvae / Number of hatched larvae) × 100%, and the results are shown in Table 1.

[0046] Table 1 Hatching rate and survival rate of Sepiella maindroni

[0047] As shown in Table 1, the hatching rate and survival rate of the examples are higher than those of each comparative example. Among them, the hatching rate of Example 1 is as high as 85%, and the survival rate is as high as 70%. Compared with Example 1, the survival rate of Comparative Example 1 is much lower than that of Example 1. This is because the cuttlefish larvae hatched naturally are scattered inside and outside the cage due to the lack of the aggregation effect of artificial floating reefs. Since the cover net is not set, some cuttlefish larvae are preyed on by birds. After 1 month of growth, the growth rate of cuttlefish larvae is slow and the survival rate is low; in Comparative Example 2, no artificial floating reef is set, so there is no attachment point for cuttlefish larvae; in Comparative Example 3, no algae-mussel flow-blocking ecological rope is set, so the water flow velocity cannot be effectively reduced, the seawater quality cannot be improved, and there is no attachment point for cuttlefish, resulting in a low hatching rate of cuttlefish and a low survival rate of cuttlefish larvae. The efficient proliferation method of Sepiella maindroni with integrated grazing and farming adopted in Example 1 and Example 2 effectively improves the growth rate and survival rate of cuttlefish by reasonably selecting the sea area and designing the breeding and proliferation facilities. This method has high feasibility and popularization value, and provides an effective technical solution for the artificial proliferation of Sepiella maindroni. This shows that the present invention can effectively improve the survival rate of Sepiella maindroni and increase the proliferation rate by optimizing the proliferation method.

[0048] The selection of the sea area is one of the key factors for the success of cuttlefish proliferation. The water depth, temperature, salinity and plankton density of the sea area selected in the examples all meet the optimal conditions for cuttlefish growth. The environmental conditions of a water depth of 30 meters, a temperature of 25 °C and a salinity of 22.89 are conducive to the hatching of cuttlefish fertilized eggs and the growth of larvae.

[0049] In Example 1, the design of the aquaculture facilities fully considered the ecological habits and growth requirements of cuttlefish. The size and depth of the proliferative empty cages were optimized to provide sufficient activity space for cuttlefish larvae and prevent the entry of cuttlefish natural enemies to prey on them. The setting of artificial reefs provided habitats and foraging places for cuttlefish larvae. The use of covering nets effectively prevented natural enemies from preying. The setting of algae-mussel seedling strings effectively reduced the water flow velocity, improved the seawater quality, and provided attachment points for cuttlefish, increasing the survival rate of cuttlefish larvae. In the comparative example, artificial reefs, covering nets, and algae-mussel flow-blocking ecological ropes were not set, and these design defects led to a lower growth rate and survival rate of cuttlefish larvae.

[0050] An efficient proliferation method for Sepiella maindroni integrating farming and ranching proposed by the present invention realizes the efficient proliferation of cuttlefish by optimizing the sea area selection, aquaculture facility design, and proliferation process, while taking into account the protection of the ecological environment. The experimental results of Example 1 show that this method can significantly improve the growth rate and survival rate of cuttlefish and has little impact on the ecological environment. The experimental results of Comparative Example 1, however, show that due to design defects, the traditional proliferation method results in a lower growth rate and survival rate of cuttlefish and has an insignificant effect on improving the ecological environment.

[0051] Wild domestication is generally used for large mammals such as giant pandas and birds, but it is very rare in the aquaculture field. In recent years, methods such as wild domestication have been proposed for a few fish species such as large yellow croaker, aiming to improve the adaptability and survival rate during the proliferation process of fish. However, most of them are mainly based on pond and runway facilities, and there has been no relevant report on cuttlefish so far. At the same time, the wild domestication of cuttlefish is based on its innate reef-loving behavior, strong spatial awareness, and behavior of drilling into cages, which enables it to be combined with the existing cage aquaculture activities, thus realizing the domesticated proliferation method integrating farming and ranching. Therefore, it has very strong species specificity. At the same time, the two processes of cuttlefish wild domestication and proliferation and release are integrated and achieved simultaneously. Cuttlefish fertilized eggs naturally adapt to the proliferation waters during the hatching process of proliferation and release, and at the same time, the domestication process is also completed during proliferation. However, in the wild domestication process of fish, due to the lack of a fertilized egg proliferation mode, its wild domestication process is completed before proliferation and release, and then it is proliferated into the sea area at one time, that is, the wild domestication and proliferation activities are often separated in terms of time and location. Therefore, the cuttlefish wild proliferation method involved in the present invention is unique in the aquaculture field.

[0052] Therefore, the present invention provides an effective technical solution for the artificial proliferation of Sepiella maindroni, with high feasibility and popularization value. Adopting an efficient proliferation and release mode integrating farming and ranching, which combines farming and proliferation activities into one, not only provides a protective environment and fattening conditions for proliferated individuals during the initial stage of proliferation (the most vulnerable period of cuttlefish), but also enables cuttlefish to be fully wild domesticated before completely escaping into the natural sea area, gradually adapting them to the natural sea area conditions, thereby ensuring the environmental adaptability and proliferation survival rate of proliferated cuttlefish.

Claims

1. A highly efficient proliferation method for Sepiella maindroni with integrated farming and ranching, characterized in that, It includes the following steps: (1) Select a harbor sea area with clear water, slow current, and small-scale offshore cage farming, where the temperature is 14 - 30 °C, the salinity is 22.89 - 31.43, and the area with relatively rich planktonic animals and plants. The offshore cage is a traditional fish seawater cage or a deep-water cage, and normal farming activities can be carried out; (2) Set up an empty proliferation cage with artificial floating reefs inside in the downstream direction of the water flow of the traditional fish seawater cage or the deep-water cage, and construct an algae - mussel flow-blocking ecological rope symbiotic system around the cage; (3) Put the artificially bred cuttlefish fertilized eggs just produced into the proliferation cage, hang them deep in the empty proliferation cage, and conduct natural hatching.

2. The method for highly efficient proliferation of Sepiella maindroni with integrated farming as claimed in claim 1, wherein In step (1), the sea area is selected in the area where the water depth contour is below 30 meters.

3. The method for efficient proliferation of Sepiella maindroni in the integration of aquaculture and stock enhancement according to claim 1 or 2, characterized in that In step (1), the sea area is selected with a temperature of 22 - 28 °C and a salinity of 19.61 - 26.

18.

4. The method for efficient proliferation of Sepiella maindroni in integrated farming according to claim 1, characterized in that, In step (2), the algae is at least one of kelp and laver.

5. An efficient proliferation device for Sepiella maindroni with integrated farming and ranching, characterized in that, It includes a proliferation cage (4), the proliferation cage (4) is placed inside the empty proliferation cage (1), a cover net (2) is set at the top of the empty proliferation cage (1), an artificial floating reef (3) is arranged inside, an algae - mussel flow-blocking ecological rope (5) is arranged outside, the upper half of the algae - mussel flow-blocking ecological rope (5) is provided with algae (6) with seedlings wrapped, and the lower half is mussels (7) with seedlings wrapped.

6. The high-efficiency proliferation device for Sepiella maindroni with integrated farming according to claim 5, characterized in that, The mesh diameter of the empty proliferation cage (1) is 2 - 3 cm, the area is 6 × 6 meters, and the depth is 8 - 10 meters.

7. The efficient proliferation device for Sepiella maindroni with integrated farming according to claim 5, characterized in that, The area of the artificial floating reef (3) is 2 × 2 meters, and the material is wood.

8. The efficient proliferation device for Sepiella maindroni integrated with farming and ranching according to claim 5, characterized in that, The algae - mussel flow-blocking ecological rope (5) is 3 meters long, and the ratio of algae (6) to mussels (7) is 1:(1 - 1.5).

9. The high-efficiency proliferation device for Sepiella maindroni with integrated herding according to claim 5 or 6, characterized in that, Around the empty proliferation cage (1), an algae - mussel flow-blocking ecological rope (5) is placed every 0.4 - 1 meter, and each rope has 750 - 900 mussel seedlings, and the shell length of the mussels is 0.3 - 0.6 cm.

10. The efficient proliferation device for Sepiella maindroni with integrated cultivation and ranching according to claim 5, characterized in that, The proliferation cage (4) is hung 3 - 4 meters deep in the empty proliferation cage (1), and an algae - mussel flow-blocking ecological rope (5) with seedlings wrapped is arranged outside the proliferation cage (4).

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