Stepped wild domestication device for sepiella maindroni

Abstract

The invention discloses a sepiella maindroni stepped wild domestication device which comprises a plurality of net cages arranged from inside to outside, each net cage is provided with a plurality of meshes, and the meshes in different net cages are gradually increased from inside to outside in a stepped manner; a plurality of suspension type fish reefs are arranged in the net cage, each suspension type fish reef comprises a plurality of single bodies horizontally installed on the floating rope, and each single body is a shell with a plurality of small holes formed in the shell wall. An area which is flat in terrain, relatively gentle in water flow, rich in plankton and about 10 m in water depth is selected near a sea area to be released as a domestication field, the device is put into the domestication field, and in-situ wild domestication is carried out on sepiella maindroni larvae; and the predation capability, the capability of avoiding enemies and the capability of coping with environmental stress after entering a natural sea area are improved, so that the enhancement and release effects are improved.

Description

Technical Field

[0001] The present invention belongs to the field of marine ecology and fishery resources, and particularly relates to a stepped wild domestication device for Sepiella maindroni Background Art

[0002] Artificial propagation and release is an important means to restore wild fishery resources. In recent years, with the continuous breakthrough of the artificial breeding technology of Sepiella maindroni, Sepiella maindroni has been listed as one of the most important species for propagation and release in Zhejiang Province. Its resource volume has also recovered year by year. The almost exhausted Sepiella maindroni has reappeared on the tables of ordinary people, with very significant economic and ecological benefits.

[0003] Currently, the propagation and release of Sepiella maindroni mainly focuses on releasing fertilized eggs. Due to the lack of effective hiding places for the fertilized eggs released in the natural sea area, a large proportion of them either become bait for fish, shrimps, crabs, etc., or sink to the bottom of the sea under the impact of sea waves. They cannot be normally hatched due to insufficient light and oxygen deficiency caused by sludge covering, which greatly limits the survival rate of the propagation and release of Sepiella maindroni and restricts the large-scale development of the propagation and release of Sepiella maindroni. Sepiella maindroni can also be propagated by releasing fry, but usually requires multiple people to operate simultaneously, which takes a long time. And when releasing, due to a certain height difference between the ship's side and the sea surface, the fry is poured into the sea together with water, which is easy to get injured and can also easily cause stress reactions in Sepiella maindroni, resulting in ink spraying, leading to a decline in the vitality of the released fry or even death, seriously affecting the release effect and causing a huge waste of manpower and financial resources.

[0004] Chinese Patent Publication No.: CN108157235B, Publication Date: September 8, 2020, discloses an invention named an in-situ fertilized egg propagation and release method suitable for Sepiella maindroni. This invention uses artificial resin as the material and takes the sea fan in the natural sea area as the model to make a fertilized egg collector; the fertilized egg spawning device is used for the sea cage in the sea area of Sepiella maindroni. The technical solution selects to release fertilized eggs, which will limit the survival rate of the propagation and release of Sepiella maindroni.

[0005] Chinese patent publication number: CN103988796B, publication date: October 7, 2015, discloses an invention entitled a method for releasing fry of needleless squid, which comprises the following steps: a. preparation: when the fry of needleless squid is transported and released by a live water transport ship or a transport barrel and arrives at the release sea area, the water inlet valve of the live water tank or the transport barrel is closed, the water depth is discharged to 20-40 cm, the outlet valve is closed, and oxygenation is stopped; b. collecting fry: covering the live water tank opening with a shade cloth, and irradiating the corner of the live water tank with a light source of 1000-2000lx; c. siphoning release: using a plastic tube with a smooth inner wall and a diameter of ≥6cm, the fry is siphoned from the corner of the live water tank into the sea water; during siphoning, the water inlet valve of the live water tank is opened, and the water inlet is adjusted to keep the water depth of the live water tank between 20 and 40 cm until the fry is released into the sea. This method requires multiple people to operate at the same time, is time-consuming, and can easily cause damage to the seedlings. Summary of the invention

[0006] The present invention provides a stepped wild domestication device for the Manson's needleless squid. By arranging stepped net cages and suspended fish reefs, the Manson's needleless squid larvae can be domesticated in situ to improve their survival ability after entering the natural sea area and achieve the effect of proliferation and release.

[0007] A further object of the present invention is to provide stepped cages to ensure that the larvae of the needleless squid are domesticated in situ and retain their wildness, while protecting the smaller larvae of the squid from being preyed upon by large fish and improving the survival rate.

[0008] A further purpose of the present invention is to provide natural bait for the Manson squid by setting up artificial light sources to gather plankton in the water without artificial feeding.

[0009] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a stepped wild domestication device for Manson's needleless squid, comprising a plurality of cages arranged from the inside to the outside, with a plurality of meshes on the cages, and the meshes on different cages are stepped and increased from the inside to the outside; a plurality of suspended fish reefs are arranged in the cages, and the suspended fish reefs include a plurality of monomers horizontally mounted on floating ropes, and the monomers are shells with a plurality of small holes on the shell wall. An area with flat terrain, relatively gentle water flow, relatively rich plankton, and a water depth of about 15 meters is selected as an domestication field near the sea area to be released, and the device is placed in the domestication field to carry out in-situ wild domestication of Manson's needleless squid larvae, so as to improve their predation ability, ability to avoid enemies, and ability to cope with environmental stress after entering the natural sea area, thereby improving the effect of proliferation and release.

[0010] Preferably, the monomer is a cylindrical hollow shell, and the floating ropes are suspended at both ends of the upper surface of the net cage. A number of monomers are linearly distributed below the floating ropes. The cylindrical hollow structure can provide a more spacious activity space for cuttlefish, and at the same time, the internal cavity can accommodate more plankton, providing a rich food source for cuttlefish. The linearly distributed monomer layout is conducive to cuttlefish freely shuttling between different monomers, increasing their activity range, promoting the improvement of their motor ability, and further enhancing their survival ability in the natural sea area.

[0011] Preferably, a number of monomer sinkers are fixedly suspended below each monomer. The sinkers are preferably stones to keep the floating fish reef suspended, and the monomer material is selected as bamboo. The floating fish reef simulates the reefs in the natural sea area and provides a good breeding ground for cuttlefish such as inhabiting, foraging, and taking shelter. Stones as monomer sinkers can stabilize the position of the floating fish reef and ensure that it will not drift easily under the action of water flow, thus providing a stable habitat for cuttlefish. The bamboo monomer has good biocompatibility and degradability, is friendly to the marine environment, and its surface texture can provide attachment points for small marine organisms, increasing biodiversity, further enriching the food chain of cuttlefish, and also helping cuttlefish better adapt to the natural environment.

[0012] Preferably, a number of monomer floats are threaded on the floating ropes, and a number of monomers are linearly distributed on the floating ropes. The floats can ensure that the floating ropes always remain floating, thus ensuring the stability and visibility of the floating fish reef. This design enables the fish reef to float freely between different water layers, simulating the dynamic changes of reefs in the natural sea area, providing a more realistic habitat environment for cuttlefish, and enhancing their adaptability to the natural environment.

[0013] Preferably, the diameter of the monomer is five meters and the width is four meters, and a number of monomers are interconnected with each other. A number of small holes are evenly distributed on the shell wall of the monomer. The small holes are used for the convenience of cuttlefish to shuttle. The larger monomer size can accommodate more cuttlefish and plankton, providing richer food resources and more spacious activity space for cuttlefish. The evenly distributed small holes not only facilitate the free shuttling of cuttlefish, but also promote the exchange of water flow, keep the water quality inside the monomer fresh, provide a good living environment for cuttlefish, and reduce the occurrence of diseases.

[0014] Preferably, the mesh diameters of the cages are 2 cm, 5 cm, and 10 cm from the inside to the outside in sequence. This can prevent medium and large-sized fish outside the cages from directly entering the acclimation field to prey on cuttlefish, while ensuring that the growing cuttlefish can freely enter and exit the acclimation field. Stepwise release is achieved through cages of different levels. This stepped mesh design can effectively prevent predators such as medium and large-sized fish outside the cages from directly entering the acclimation field to prey on cuttlefish, while allowing the growing cuttlefish to freely enter and exit the acclimation field according to their own size, realizing stepwise release. This not only improves the survival rate of cuttlefish but also enables cuttlefish to gradually adapt to the natural environment at different growth stages and enhances their survival ability in the natural sea area.

[0015] Preferably, an artificial light source is installed at the top of the floating fish reef. The artificial light source is red or green, and the light intensity is 10 lx. On the one hand, it can attract cuttlefish and keep them near the fish reef; on the other hand, it can also make plankton in the water cluster, providing natural bait for Sepiella maindroni without artificial feeding. The red or green artificial light source can attract cuttlefish to gather near the fish reef, increasing the inhabitation density of cuttlefish and facilitating communication and learning among cuttlefish. At the same time, this light source can also attract plankton in the water to cluster, providing natural bait for cuttlefish, reducing the need for artificial feeding, lowering the acclimation cost, and also making cuttlefish more adapted to the predation method in the natural environment.

[0016] Preferably, the cage is a square cage, and a wave-making pump is installed inside the floating fish reef. By simulating the complex and changeable sea conditions in the natural sea area, it allows the juvenile cuttlefish to have a gradual adaptation process and improves the anti-wave and anti-stress abilities of the juvenile cuttlefish. According to the seawater flow velocity value and the historical value of surging waves in the release sea area, wave-making pumps with different powers are gradually turned on from small to large, and the wave-making frequency and wave-making duration are also gradually increased according to the adaptation of the juvenile cuttlefish. The behavior of the juvenile cuttlefish is monitored through an underwater camera. If the swimming ability of a certain proportion of juveniles is significantly weakened, appropriate acclimation strategies can be adjusted, such as wave-making power, wave-making frequency, and duration. The wave-making pump can simulate the complex and changeable sea conditions in the natural sea area, allowing the juvenile cuttlefish to gradually adapt to different water flows and wave conditions during the acclimation process and enhancing their anti-wave and anti-stress abilities. This helps cuttlefish better cope with various environmental stresses after entering the natural sea area and improves their survival rate.

[0017] Preferably, a cage float is installed on several cages, and a cage sinker is installed below. The cage float makes several cages float.

[0018] Preferably, an underwater camera is provided inside the floating fish reef, and a fish-shaped robot is provided inside the floating fish reef in the innermost net cage. It simulates the predation interference of predators to improve its anti-predation ability. The underwater camera can monitor the behavior and health status of juvenile cuttlefish in real time, facilitating the timely discovery and adjustment of domestication strategies. The fish-shaped robot simulates the predation interference of predators on cuttlefish, which can effectively improve the anti-predation ability of cuttlefish and enhance its alertness and escape ability. This simulated predation training enables cuttlefish to better cope with natural enemies in the natural sea area and improve its survival rate.

[0019] Advantages of the present invention: Through in-situ wild domestication, problems such as the ink-jet stress of Sepiella maindroni during transportation are eliminated; the domestication environment that juvenile cuttlefish are exposed to from an early age is basically close to the natural sea area environment after release. Through step-by-step release, the release survival rate can be greatly improved, and the effect of enhancing the release of Sepiella maindroni can be significantly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a sectional view of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the floating fish reef of the present invention.

[0022] Reference numerals: 1: net cage; 2: floating fish reef; 3: floating rope; 4: single float; 5: monomer; 6: single sinker; 7: small hole; 8: net cage float; 9: net cage sinker; 10: mesh; 11: artificial light source; 12: wave-making pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Artificial enhancement and release is an important means to restore wild fishery resources. In recent years, with the continuous breakthrough of the artificial breeding technology of Sepiella maindroni, Sepiella maindroni has been listed as one of the most important species for enhancement and release in Zhejiang Province. Its resource quantity has also recovered year by year. The almost depleted Sepiella maindroni has reappeared on the tables of ordinary people, with very significant economic and ecological benefits.

[0026] Currently, the main method of releasing artificially bred Sepiella maindroni for stock enhancement is to release fertilized eggs. In the complex and ever-changing natural marine environment, the fate of fertilized eggs is full of uncertainties. Environmental factors such as water temperature, salinity, light, and water flow in the natural sea area are constantly changing, and these factors will all affect the hatching of fertilized eggs. It is difficult for us to accurately know how many fertilized eggs can successfully hatch in such an environment. More critically, the fertilized eggs released in the natural sea area face numerous crises due to the lack of effective shelters. In the world of the ocean where the strong prey on the weak, a large proportion of fertilized eggs become the prey of organisms such as fish, shrimps, crabs, etc., and are mercilessly consumed by them. Another part of the fertilized eggs sinks to the seabed under the impact of the waves. The seabed has insufficient light and is often covered by sludge, resulting in oxygen deficiency for the fertilized eggs and preventing them from normal hatching. These factors greatly limit the survival rate of the released Sepiella maindroni for stock enhancement, causing a large number of fertilized eggs to be wasted in vain and unable to achieve the purpose of stock enhancement. At the same time, it also restricts the large-scale development of the release of Sepiella maindroni for stock enhancement and is difficult to form an effective population recovery.

[0027] Currently, Sepiella maindroni is also enhanced through the release of fry. There are usually two methods: one is to drain the seawater in the transportation compartment of a special live boat to a depth of about 20 cm, transfer the fry to a bucket with water using a net bag, and then pour the bucket into the sea; the other method is to transport the fry in oxygen-filled plastic bags. When releasing, untie the water-filled packaging bag and directly pour the fry into the sea. Both methods require multiple people to operate simultaneously, which takes a long time. And when releasing, due to the certain height difference between the ship's side and the sea surface, when the fry is poured into the sea with water, it is easy to get injured and it is also easy to cause stress reactions in Sepiella maindroni, resulting in ink spraying, leading to a decline in the vitality of the released fry or even death, seriously affecting the release effect and also causing a huge waste of manpower and financial resources.

[0028] The present invention releases the larvae of Mansonia sutchuenensis and carries out in-situ wild domestication of the larvae in the sea area to be released in advance. On the one hand, this method avoids the problem of low hatching rate of fertilized eggs. The larvae have passed the early development stage and have stronger survival ability and adaptability. Compared with fertilized eggs, they can better cope with various environmental challenges in natural sea areas. At the same time, the mortality rate of released seedlings due to stress damage during transportation is also reduced. In the traditional seedling release method, the seedlings are easily damaged due to various factors in the transportation and delivery process, while in-situ wild domestication can allow the larvae to gradually adapt to the conditions of the natural sea area in a relatively stable environment, reduce stress response, and improve the survival rate of released seedlings. On the other hand, the Mansonia sutchuenensis seedlings that have been wild domesticated in situ retain their inherent wildness. During the domestication process, they learned how to prey, avoid enemies and cope with various environmental stresses in the natural environment, and can better adapt to the natural environment of the waters to be released. Compared with the direct release of fertilized eggs and larvae, the proliferation effect of this kind of wild domesticated seedlings is better. Although the artificially cultivated Mansoni larvae have a stable living environment, sufficient food sources, and are free from the threat of predation by natural enemies, their natural behavior attributes are also low. This patent greatly improves the Mansoni larvae's predation ability, enemy avoidance ability, and ability to cope with environmental stress after entering the natural sea area by carrying out in-situ wild domestication of Mansoni larvae, thereby improving the effect of proliferation and release.

[0029] like Figure 1 As shown, a stepped wild domestication device for Manson's needleless squid includes a plurality of cages 1 arranged from the inside to the outside, a plurality of meshes 10 are arranged on the cages 1, and the meshes 10 on different cages 1 are gradually increased from the inside to the outside in a stepped manner; a plurality of suspended fish reefs 2 are arranged in the cages 1, and the suspended fish reefs 2 include a plurality of monomers 5 horizontally installed on a floating rope 3, and the monomers 5 are shells with a plurality of small holes 7 on the shell wall. An area with flat terrain, relatively gentle water flow, relatively rich plankton, and a water depth of about 15 meters is selected as a domestication field near the planned release sea area, and the device is placed in the domestication field to carry out in-situ wild domestication of Manson's needleless squid larvae, so as to improve their predation ability, ability to avoid enemies and ability to cope with environmental stress after entering the natural sea area, thereby improving the effect of proliferation and release.

[0030] like Figure 1 As shown, in a preferred embodiment, the monomer 5 is a cylindrical hollow shell, and the floating rope 3 is suspended at both ends of the upper surface of the cage 1. Several monomers 5 are linearly distributed below the floating rope 3. The cylindrical hollow structure can provide a more spacious activity space for the squid, and the cavity inside it can accommodate more plankton, providing a rich food source for the squid. The linearly distributed layout of the monomers 5 is conducive to the squid's free shuttle between different monomers 5, increasing its range of activity, promoting the improvement of its movement ability, and further enhancing its survival ability in natural waters.

[0031] As Figure 1 shown, in a preferred embodiment, several single - body sinkers 6 are fixedly suspended below each single body 5. The sinkers are preferably stones to keep the floating fish reef 2 floating and ensure its stable position in the water. The material of the single body 5 is selected as bamboo. Sepiella maindroni has an obvious reef - loving behavior. By placing the floating fish reef 2 in the center of the domestication field to simulate the reefs in the natural sea area, a good breeding ground for squid such as habitat, foraging, and shelter can be provided. As the single - body sinkers 6, the stones can stabilize the position of the floating fish reef 2 and ensure that it will not drift easily under the action of water flow, thus providing a stable habitat for squid. The bamboo single body 5 has good biocompatibility and degradability, is friendly to the marine environment, and its surface texture can provide attachment points for small marine organisms, increasing biodiversity, further enriching the food chain of squid, and also helping squid better adapt to the natural environment.

[0032] In a preferred embodiment, several single - body floats 4 are threaded on the floating rope 3, and several single bodies 5 are linearly distributed on the floating rope 3. The floats can ensure that the floating rope 3 always remains floating, thus guaranteeing the stability and visibility of the floating fish reef 2. This design enables the fish reef to float freely between different water layers, simulating the dynamic changes of reefs in the natural sea area, providing a more realistic habitat environment for squid, and enhancing its adaptability to the natural environment.

[0033] As Figure 1 and Figure 2 shown, the diameter of the single body 5 is five meters and the width is four meters. Several single bodies are interconnected with each other, and several small holes 7 are evenly distributed on the shell wall of the single body 5. The small holes 7 are used for the squid to shuttle through conveniently. The relatively large size of the single body 5 can accommodate more squid and plankton, providing richer food resources and a more spacious activity space for squid. The evenly distributed small holes 7 not only facilitate the free shuttling of squid but also promote the exchange of water flow, keep the water quality inside the single body 5 fresh, provide a good living environment for squid, and reduce the occurrence of diseases.

[0034] As Figure 1As shown, in a preferred embodiment, a three-layer net cage 1 is selected, and the mesh size increases from the inside to the outside. Starting from the innermost layer, the diameter of the mesh 10 of the net cage 1 is two centimeters, the diameter of the mesh 10 of the middle layer of the net cage 1 increases to five centimeters, and the diameter of the mesh 10 of the outermost layer of the net cage 1 is further expanded to ten centimeters. In the marine ecosystem, predators of squid such as medium and large fish often pose a huge threat to the survival of the larvae of the needleless squid. The two-centimeter mesh 10 of the innermost net cage 1 is like a fine protective net, which can effectively block most medium and large fish from the outside and provide a relatively safe initial growth space for the larvae of the squid. At this stage, the larvae of the squid are small in size and do not need too much space for activities. At the same time, they also need to avoid the invasion of external predators. The smaller mesh 10 just meets this demand. As the larvae of the needleless squid continue to grow and develop, their needs for activity space and natural environment adaptation are gradually changing. At this time, the five-centimeter mesh 10 of the middle layer of the net cage 1 comes into play. The mesh 10 of this size will not make the squid larvae feel cramped, and can continue to resist some predators that are still threatening them. At the same time, it also provides a transitional space for the squid larvae, allowing them to start trying to contact and interact with the wider environment in a relatively safe manner. When the squid larvae grow further, the net cage 1 with the outermost ten-centimeter mesh 10 becomes their last step towards the natural sea. This larger mesh 10 allows the grown-up squid to enter and exit the domestication field freely, truly realizing the step-by-step release. At this time, the squid already has a certain survival ability and adaptability. They can gradually integrate into the wider natural environment through this larger mesh 10 to explore and adapt to the real ocean world. The advantages brought by this stepped mesh 10 design are multifaceted. First, it significantly improves the survival rate of squid. In the larval stage, the fine mesh 10 effectively protects them from predators and reduces unnecessary casualties. As the cuttlefish grow, the mesh 10 of suitable size provides them with an opportunity to gradually adapt to the external environment, avoiding the survival crisis caused by sudden changes in the environment. Secondly, this design allows the cuttlefish to gradually adapt to the natural environment at different growth stages. From the relatively closed and safe inner cage 1 at the beginning to the gradually open outer cage 1, the cuttlefish constantly contacts and adapts to different degrees of external environmental factors, such as water flow, temperature, light, etc. during the growth process. This gradual adaptation process greatly enhances their survival ability in the natural sea. They have learned how to find food, avoid natural enemies, and adapt to environmental changes in a complex marine environment, laying a solid foundation for their independent survival in the natural sea. The realization of step-by-step release also makes the entire proliferation and release process more scientific and efficient. Through the gradual transition of cages 1 at different levels, many problems caused by putting cuttlefish into the natural sea at one time in the traditional release method are avoided, such as the large-scale death of larvae due to inability to adapt to the environment.It allows the cuttlefish to receive the most appropriate protection and guidance at different growth stages, improves the success rate of reproduction and release, and provides strong support for the recovery and growth of the Manson's needleless squid population. This not only improves the survival rate of the cuttlefish, but also allows the cuttlefish to gradually adapt to the natural environment at different growth stages and enhance its survival ability in natural waters.

[0035] During the domestication process of the needleless squid, light conditions play a crucial role in its growth and adaptation to the natural environment. Figure 2 As shown in the figure, after repeated research and practical verification, we found that the Manson squid has a unique preference for weak light of a specific color. They especially like weak light of red or green light sources, and the suitable light intensity range is between 0.01-10lx. Based on this characteristic, in order to better simulate the natural environment and meet the survival needs of the Manson squid, a red or green light source is carefully installed on the top of the suspended fish reef 2. Considering that light will attenuate when propagating in water, in order to ensure that the Manson squid's demand for light intensity can be met at all positions, the light intensity is deliberately controlled at 10lx, and this value is set as the maximum light intensity within the suitable range. In this way, the top of the suspended fish reef 2 has a stable and suitable artificial light source 11, which is red or green in color and has a constant light intensity of 10lx. On the one hand, it can attract squid and keep it near the fish reef; on the other hand, it can also allow plankton in the water to gather, which happens to be one of the main food sources of the Manson squid, so that a small ecosystem is formed near the fish reef. The formation of this ecosystem provides the Mansoni squid with abundant natural bait without the need for additional artificial feeding. This not only reduces the workload and cost of artificial feeding, but more importantly, allows the squid to obtain food in a natural way in a natural environment, which is closer to their living conditions in natural waters, making them more adaptable to the predation methods in natural environments. The red or green artificial light source 11 can attract squids to gather near fish reefs, increase the habitat density of squids, and facilitate communication and learning between squids. For example, in an actual domestication scenario, when the red light source is on, it can be quickly observed that the squids swim from all directions to the vicinity of the fish reefs. They gather around the fish reefs to form a relatively dense group. At the same time, a gathering of plankton gradually appears in the surrounding waters, and they swim around the fish reefs under the attraction of the light source. In this process, the squids naturally begin to prey on these gathered plankton, and their predation behavior gradually becomes more skilled and efficient. In this way, the squids continue to adapt to the natural environment during the domestication process, laying a solid foundation for their survival in natural waters in the future.

[0036] In a preferred embodiment, the net cage 1 is a square net cage 1, and a wave-making pump 12 is provided in the suspended fish reef 2. By simulating the complex and changeable sea conditions in natural sea areas, the squid larvae are allowed to gradually adapt to the process, thereby improving the squid larvae's ability to resist wind and waves and stress. According to the seawater flow rate value and the surge history value of the release sea area, the wave-making pumps 12 of different powers are opened step by step from small to large, and the wave-making frequency and wave-making duration are gradually increased according to the adaptation of the squid larvae. The behavior of the squid larvae is monitored by underwater cameras. If a certain proportion of the larvae's swimming ability is significantly weakened, appropriate domestication strategies such as wave-making power, wave-making frequency and duration can be adopted. The wave-making pump 12 can simulate the complex and changeable sea conditions in natural sea areas, allowing the squid larvae to gradually adapt to different currents and wind and wave conditions during the domestication process, and enhancing their ability to resist wind and waves and stress. This helps the squid to better cope with various environmental stresses after entering the natural sea area and improve its survival rate.

[0037] like Figure 1 As shown, in a preferred embodiment, a plurality of cages 1 are provided with cage floats 8, and cage sinkers 9 are provided below. The cage floats 8 suspend the plurality of cages 1. The cage floats 8 suspend the plurality of cages 1 in the water, and the cage sinkers 9 stabilize the position of the cages 1. They cooperate with each other to ensure the stability of the cages 1 in the water, and provide a stable acclimation environment for the squid larvae. Four fixing devices are provided below each cage, and in this embodiment, the fixing devices are preferably anchors.

[0038] In a preferred embodiment, an underwater camera is provided in the suspended fish reef 2, and a fish-shaped robot is provided in the suspended fish reef 2 in the innermost net cage 1. The simulated predator interferes with the predation and improves its anti-predation ability. The underwater camera can monitor the behavior and health status of the squid larvae in real time, so as to facilitate timely discovery and adjustment of the domestication strategy. The fish-shaped robot simulates the predator to interfere with the predation of the squid, which can effectively improve the anti-predation ability of the squid and enhance its vigilance and escape ability. This simulated predation training can enable the squid to better deal with natural enemies in natural waters and improve its survival rate.

[0039] The present invention eliminates problems such as inkjet stress during transportation of the needleless squid through in situ wild domestication; more importantly, the domestication environment that the larvae have been exposed to since childhood is basically close to the natural sea environment after release. Through step-by-step release, the survival rate of the release can be greatly improved, and the effect of the proliferation and release of the needleless squid can be significantly improved, which can serve as a model for the proliferation and release of other species.

[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A step-by-step wild domestication device for the Mansoni squid, characterized in that: It includes a plurality of net boxes arranged from the inside to the outside, each net box is provided with a plurality of mesh holes, and the mesh holes on different net boxes are gradually increased from the inside to the outside in a step-by-step manner; The innermost net cage is provided with a plurality of suspended fish reefs, which include a plurality of monomers horizontally mounted on floating ropes, and the monomers are shells with a plurality of small holes on the shell wall.

2. The step-by-step wild domestication device for the Mansoni needleless squid according to claim 1 is characterized in that: The single body is a cylindrical hollow shell, and the floating ropes are suspended at both ends of the upper surface of the cage.

3. A step-by-step wild domestication device for the Mansoni needleless squid according to claim 1 or 2, characterized in that: A number of monomer sinkers are fixedly hung under each monomer.

4. A step-by-step wild domestication device for the Mansoni needleless squid according to claim 1 or 2, characterized in that: A plurality of monomer floats are arranged on the floating rope, and the plurality of monomers are linearly distributed on the floating rope.

5. The step-by-step wild domestication device for the needleless cuttlefish of claim 4 is characterized in that: The diameter of a single cell is five meters and the width is four meters, and several single cells are interconnected.

6. The step-by-step wild domestication device for the Mansoni needleless squid according to claim 1 is characterized in that: The mesh diameters of the cages are 2 cm, 5 cm and 10 cm from the inside to the outside.

7. A step-by-step wild domestication device for the Mansoni needleless squid according to claim 1, 2 or 6, characterized in that: There is an artificial light source on the top of the suspended fish reef. The artificial light source is red or green and the light intensity is 10lx.

8. The step-by-step wild domestication device for the Mansoni needleless squid according to claim 7 is characterized in that: The fish cage is a square cage with a wave-making pump installed inside the suspended fish reef.

9. The step-by-step wild domestication device for the Mansoni needleless squid according to claim 8 is characterized in that: Cage floats are arranged on a plurality of cages, and cage sinkers are arranged below.

10. The step-by-step wild domestication device for the Mansoni needleless squid according to claim 8 is characterized in that: The suspended fish reef is equipped with underwater cameras and fish-shaped robots.

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