Prawn rearing system for raising prawns

Abstract

The invention relates to a prawn rearing system (1) for raising prawns. The prawn rearing system (1) comprises at least one first rearing tank (2) for receiving water and prawns, wherein the first rearing tank (2) has a tank base (4) and a tank wall (6) with a tank wall height and a nominal height up to which water can be filled into the first rearing tank (2). In addition, the prawn rearing system (1) comprises at least one first horizontal level (8) which is arranged at a vertical distance from the tank base (4) in the first rearing tank (2) and has a first horizontal level surface (A2) which is at least 1 / 10 smaller than a base surface (A1, A2) of the tank base. Furthermore, the prawn rearing system (1) has a sorting device (18) for sorting the prawns according to their size in the first rearing tank (2), wherein the sorting device (18) has at least one substantially vertically arranged first sorting grid (20), a sorting grid drive (22) and a sorting controller (24), wherein the sorting controller (24) activates the sorting grid drive (22) in such a manner that the first sorting grid (20) is moved to and fro along a first longitudinal direction (L1) of the first rearing tank (2).

Description

[0001] Shrimp hatchery for raising shrimp

[0002] The invention relates to a shrimp breeding system for raising shrimp.

[0003] While shrimp used to be caught mainly on the high seas, today they are mostly farmed in industrial shrimp aquacultures to meet the growing demand for shrimp. Large shrimp farms are establishing themselves primarily in warm-water regions. Since shrimp are sensitive to a lack of oxygen, the water must be constantly exchanged. Furthermore, antibiotics and / or chemicals are used to counteract fungal diseases in the shrimp. In shrimp farms built in the immediate vicinity of rivers and canals, there is always the risk that the antibiotics and / or chemicals fed to the shrimp will enter the surrounding waters unfiltered. This places a severe strain on the ecosystem. Another problem is the introduction of large amounts of nutrients into the surrounding ecosystems through feed and excretions. This can lead to excessive and problematic algae growth.

[0004] Attempts are therefore being made to increasingly shift shrimp farming indoors and develop closed systems to reduce the strain on the ecosystem. In specially designed breeding facilities, the shrimp environment can be constantly monitored and breeding optimized. Furthermore, indoor breeding facilities are sustainably scalable, making them suitable for meeting a large portion of the growing demand for shrimp in the future. State-of-the-art indoor breeding facilities are already known.

[0005] EP 3220736B1 relates to a flow channel, as well as a system and a method for indoor shrimp farming. The flow channel comprises a plurality of interconnected sections, with a receiving area arranged upstream and a harvesting area arranged downstream. A movable or at least partially movable partition wall is provided between the sections, which can be raised and lowered so that the shrimp can pass between the sections. A deterrent system with a screen wall is optionally provided for moving the shrimp. The deterrent system, including the screen wall, can be moved linearly downstream along the length of the corresponding section, thereby pushing the shrimp toward the next section.

[0006] The device described above thus has a scaring system that forces shrimp together and moves them to the next section regardless of their individual size.

[0007] However, it has been shown that shrimp exhibit different growth rates even within a shrimp cohort. After several weeks, individual shrimp within a shrimp cohort can exhibit size differences of several hundred percent. If the shrimp are not sorted by size during rearing, the effort required for subsequent processing increases, as undersized, unsaleable animals must be sorted out and disposed of after harvest. Document EP 3220736B1 does not recognize this problem and does not provide a solution.

[0008] In addition, if the shrimp are crowded together, there is a risk that the shrimp will be exposed to too close physical contact, which can lead to stress-related reactions.

[0009] US 2015 / 0342156 A1 relates to a shrimp farming system with a breeding tank and a clarifier. Several breeding cubes are arranged in the breeding tank, each breeding cube having a plurality of stacked frames. The frames span nets on which the shrimp can grow. The document therefore proposes introducing intermediate levels into the breeding tank. Shrimp that prefer to settle on flat levels can therefore spread out more effectively. However, US 2015 / 0342156 A1 does not disclose a device for sorting the shrimp during the breeding process.

[0010] KR10-2081259B1 relates to a shrimp rearing tank. The main body of the shrimp rearing tank is divided into two compartments separated by a partition. The partition is movable on guide rails, with the guide rails arranged longitudinally from a first end to another end on both inner side walls of the main body. The partition is designed to separate young shrimp larvae from adult shrimp. For this purpose, the partition has a mesh, wherein the diameter of the pores formed in the mesh is preferably less than 0.08 mm, so that only the young larvae can pass through.

[0011] While the ability to move the partition along the guide rails eliminates the need for manual shooing of the shrimp, it still requires significant personnel effort to manually move the partition. The disclosed shrimp rearing tank is therefore not easily scalable. Furthermore, the partition disclosed in the document is only suitable for separating two predefined shrimp sizes. Shrimp that are too large for the pores created in the net but too small for sale are still harvested along with the adult shrimp and must be sorted out during subsequent processing.

[0012] The object of the invention is to provide a system for raising shrimp that enables the harvest of shrimp of the most uniform size possible. Furthermore, the object of the invention is to provide a system that reduces the stress experienced by the shrimp during rearing. A further object of the invention is to provide a system that is scalable and can increase the efficiency of rearing.

[0013] In the shrimp breeding facility of the type mentioned above, at least one of the above objects is achieved by a breeding tank for holding water and shrimp. The breeding tank has a tank floor and a tank wall with a tank wall height and a nominal height up to which water is to be filled into the breeding tank. Preferably, at least one first horizontal plane is arranged in the breeding tank at a vertical distance from the tank floor. The first horizontal plane has a first horizontal plane surface, which is preferably at least 1 / 10 smaller than a floor surface of the tank floor. Preferably, a sorting device for sorting the shrimp according to their size is also arranged in the breeding tank.The sorting device preferably comprises at least one substantially vertically arranged first sorting grid, an optional sorting grid drive and an optional sorting control, wherein the sorting control preferably controls the sorting grid drive in such a way that the first sorting grid is moved back and forth along a first longitudinal direction of the rearing tank.

[0014] As already mentioned, shrimp increasingly settle on the bottom surface after the juvenile phase. If the stock density on the bottom surface becomes too high, this results in increasing stress for the animals. This stress can result in slowed growth, increased mortality, aggressive behavior, and / or increased swimming activity of the shrimp. At least a first horizontal plane with a first horizontal plane area that is at least 1 / 10 smaller than the bottom surface of the tank increases the area on which the shrimp can settle. The stress on the shrimp is reduced. Furthermore, an additional horizontal plane area makes it possible to increase the breeding area so that a larger stock of shrimp can be accommodated in a breeding tank.

[0015] The sorting system allows the shrimp to be sorted by size. The shrimp can thus be sorted in such a way that the fished shrimp are of a uniform size, which is aligned with market requirements. Subsequent manual sorting of undersized, unsaleable shrimp is preferably no longer necessary. Slow-growing shrimp remain in the rearing tank longer. They can continue to develop and be harvested at a later date. The proportion of shrimp that cannot be used is significantly reduced overall.

[0016] Furthermore, the sorting device, including the sorting grid drive and sorting control system, can be automatically moved back and forth along the first longitudinal direction of the rearing tank. Manual movement of the sorting device within the rearing tank is not necessary. As a result, personnel costs can be reduced and the system is highly scalable.

[0017] In a preferred embodiment, the shrimp breeding facility has at least one first partition wall that can be selectively arranged in the breeding tank for selectively separating a first tank area. The first partition wall makes it possible to separate a group of shrimp in the first tank area from the remaining shrimp. The separated group of shrimp can then be further processed separately from the remaining shrimp; for example, the separated group of shrimp can be harvested or fed differently from the remaining shrimp. Alternatively, the first partition wall makes it possible to keep the first tank area free of shrimp in order to refill the emptied first tank area with young larvae. It is preferred that the first partition wall is arranged at a fixed position in the breeding tank. It is particularly preferred that the first partition wall is movable along the first longitudinal direction of the breeding tank.The first partition wall can thereby be positioned at different positions in the breeding tank. The first tank area can thus be adapted to the group size of the separated animals. It is preferred that the first partition wall completely separates the first tank area from the rest of the breeding tank, thus preventing both the passage of water and the passage of animals. Preferably, the first partition wall has openings that allow the passage of water but prevent the passage of animals. In a further preferred embodiment, the first partition wall has openings that allow the passage of animals up to a certain size.

[0018] Preferably, the first horizontal plane is formed at least in sections from a mesh material. The mesh material is preferably sufficiently tight-meshed so that older animals cannot slip through the first horizontal plane. It is preferred that the mesh material has a mesh size in a range from 0.5 mm to 10 mm, preferably in a range from 1 mm to 3 mm. Preferably, the mesh material is formed at least partially from a polyethylene material, particularly preferably at least partially from a high-density polyethylene material (HDPE). In a preferred embodiment, the mesh material is formed at least partially from a glass fiber fabric coated with polyethylene material or from a nylon gauze. The mesh material is preferably held by a horizontal plane frame, wherein the horizontal plane frame is preferably formed from a polymer material.Particularly preferably, the horizontal plane frame is formed from a polyvinyl chloride material, a polyethylene material, or a polypropylene material, or mixtures thereof. In a preferred development, the horizontal plane frame is formed from an aluminum material. Alternatively, the horizontal plane frame is formed from a flexible material, in particular a spring material, such as a resilient plastic or metal material or a fiber composite material. In a preferred development, a second horizontal plane is provided in the breeding tank, which is arranged vertically spaced above the first horizontal plane in the breeding tank. The second horizontal plane preferably has a second horizontal plane surface that is at least 1 / 10 smaller than the bottom surface of the tank floor. Particularly preferably, the area of ​​the first horizontal plane surface is identical to the area of ​​the second horizontal plane surface.It is preferred that the first horizontal plane is rectangular, polygonal, or partially or completely round. It is preferred that the second horizontal plane is rectangular, polygonal, or partially or completely round. The first and second horizontal planes are preferably kept at a distance by tubes or round rods and are placed or fastened to the tank floor. The tubes or round rods are preferably made of a fiber-plastic composite, particularly preferably of a glass fiber reinforced plastic. The first and second horizontal planes are preferably placed on the tank floor in such a way that they are accessible from the sides. As a result, shrimp can swim around the plane in the open water and reach the planes via the side entrances.It is further preferred that more than two horizontal planes, for example, three, four, or five horizontal planes, or more than five horizontal planes, are arranged in the breeding tank. Two or more horizontal planes that are connected to each other and preferably arranged vertically one above the other are also referred to as a horizontal plane block and can preferably be positioned as a unit in the tank or removed.

[0019] In a further development, the horizontal plane(s) are equipped with one or more floats so that they float partially or completely within the pool. The horizontal planes can be partially supported by the pool floor and partially held by the float(s).

[0020] In a preferred variant, the horizontal planes are held exclusively by the floats. In this variant, the individual horizontal planes are preferably connected to each other via flexible suspensions such as ropes, chains, or movable or flexible rods, so that the individual horizontal planes can be easily removed and then folded together in their removed state.

[0021] It is preferred that a first height between the tank floor and the first horizontal plane is in a range of 15 cm to 40 cm, particularly preferably in a range of 20 to 33 cm. A height in this range allows shrimp to swim in the open water between the tank floor and the first horizontal plane. In addition, the floor area below the first horizontal plane can also be used by the shrimp for settling. It is preferred that the first height is variably adjustable within the preferred range. For this purpose, the first horizontal plane can be moved up and down along the pipes, round rods or flexible suspension or can be hooked into different positions.

[0022] Preferably, a second height between the first horizontal plane and the second horizontal plane is in a range from 15 cm to 40 cm, particularly preferably in a range from 20 cm to 33 cm. A height in this range makes it possible to supply shrimp that settle on the first horizontal plane with sufficient oxygen. It is preferred that the second height between the first horizontal plane and the second horizontal plane is variably adjustable within the preferred range. For this purpose, the first horizontal plane and / or the second horizontal plane can be moved up and down along the tubes or round rods. If other flexible suspensions are provided instead of tubes or round rods, the horizontal planes are preferably provided with these suspensions in an adjustable or flexibly fixable manner.In a particularly preferred embodiment, the first height between the pelvic floor and the first horizontal plane and the second height between the first horizontal plane and the second horizontal plane are identical.

[0023] It is preferred that the ratio of the first horizontal plane surface to the floor surface be in a range of 0.1 to 0.9. Ratios within this range allow the shrimp to swim up and down in the rearing tank. Furthermore, space is kept free for feeding the animals. Since it is preferred that the first horizontal plane surface and the second horizontal plane surface, as well as all preferred further horizontal plane surfaces of further horizontal planes, are identical, an effective area for rearing shrimp is calculated as follows: A e tf=a1 (1 +p(a2 / a1 )), where A e tf is the effective area, a1 is the floor area, a2 is the horizontal plane area and p is the number of planes.

[0024] In a preferred development, the sorting grid has a fineness in a range from 1 mm to 35 mm, particularly preferably in a range from 2 mm to 30 mm. The grid preferably has at least partially horizontally arranged grid bars. It is preferred that the sorting grid has at least partially vertically arranged grid bars. In a particularly preferred embodiment, the sorting grid at least partially has both horizontally arranged grid bars and vertically arranged grid bars. The sorting grid preferably has at least partially holes, slots or other openings. The sorting grid can have different grid structures. It is preferred that the grid structure of the sorting grid is designed such that the sorting grid can move through the horizontal planes.For this purpose, the sorting grid preferably has horizontal slots or recesses arranged at the level of the horizontal planes. The slots are preferably sealed at the edges. The seals on the slots serve to seal against the horizontal planes. The sealing can be implemented, for example, using brushes, lips, foam seals, rubber or silicone flaps, folding elements, combinations thereof, or similar. With such a design, care must be taken to ensure that the horizontal slots do not create unwanted escape routes for animals. The sorting grid preferably extends completely across the cross-section of the rearing tank.

[0025] The shrimp rearing system preferably has a guide rail for guiding and supporting the sorting grid. It is preferred that two opposing guide rails are arranged, which extend along the first longitudinal direction of the rearing tank. It is preferred that guide rails are arranged along two opposite tank wall sides. It is particularly preferred that the guide rails are arranged on the tank edges of the rearing tank. It is also possible to arrange the guide rails centrally above the rearing tank, e.g., on a ceiling of the rearing tank. The sorting grid preferably has at least one moving element, wherein the moving element is supported on the guide rail. The grid is driven along the guide rail by means of the sorting grid drive. In a particularly preferred embodiment, the sorting grid drive is designed as a rack and pinion drive.In a further preferred embodiment, the sorting grid drive is designed as a chain drive, belt drive or friction wheel drive.

[0026] Preferably, the fineness of the first sorting grid is variably adjustable. The sorting control is preferably configured to adjust the fineness of the first sorting grid. It is particularly preferred that the distance between the grid bars is variably adjustable. Preferably, the grid bars are moved by means of an actuator connected to the sorting control. It is preferred that the ends of the grid bars are arranged in grid bar guide rails. The grid preferably comprises at least partially slats, wherein the slats are pivotally mounted and can preferably be moved by means of an actuator connected to the sorting control. In a preferred embodiment, the sorting grid has perforated plates, turntables, iris diaphragms, simple flaps or the like that can be moved relative to one another, wherein the protruding elements can preferably be moved by means of an actuator connected to the sorting control.In a particularly preferred embodiment, the sorting grid preferably comprises two grid plates that are arranged so that they can be moved relative to one another. By moving the two grid plates relative to one another, the fineness of the sorting grid can be adjusted.

[0027] A variably adjustable sorting grid allows shrimp to be sorted according to different sizes. The size of the shrimp to be harvested can thus be optimally adapted to market requirements. It is also possible to separate shrimp at different sizes. For example, adult shrimp can be separated from juvenile shrimp and / or juvenile shrimp from shrimp larvae.

[0028] In a preferred embodiment, the shrimp breeding facility comprises a lifting device for selectively raising and lowering the first dividing wall. This makes it possible to change the composition of the shrimp within the first tank area. When the dividing wall is raised, shrimp can leave the first tank area and / or shrimp can enter the first tank area. Shrimp of a certain size can, for example, be moved into the first tank area using the first sorting grid. Conversely, shrimp can also be pushed out of the first tank area using the first sorting grid. The separated, first tank area is thus not permanently occupied by a shrimp cohort.

[0029] In a further preferred development, the shrimp breeding facility has a second partition wall that can be selectively arranged in the breeding tank for selectively separating a second tank area. A further group of shrimp can be separated in the second tank area. In total, three different groups of shrimp can thus be separated from one another in one breeding tank. The three different groups of shrimp can be further processed separately from one another. It is preferred that the second partition wall is arranged at a fixed position in the breeding tank. It is particularly preferred that the second partition wall is movable along the first longitudinal direction of the breeding tank. The second partition wall, like the first partition wall, can thus be positioned at different positions in the breeding tank.It is preferred that the second partition wall completely separates the first tank area from the rest of the breeding tank, thus preventing both the passage of water and the passage of animals. The second partition wall preferably has openings that allow the passage of water but prevent the passage of animals. In a further preferred embodiment, the second partition wall has openings that allow the passage of animals up to a certain size. It is particularly preferred that the first and the second partition wall can move through the horizontal planes. For this purpose, the first and the second partition wall preferably have horizontal slots or recesses which are arranged at the level of the horizontal planes. The horizontal slots are preferably sealed at the edges.

[0030] By using selectively adjustable and removable partition walls, it is possible to provide a shrimp cohort with more space in the tank as it grows. This allows the tank to accommodate a relatively constant total mass of shrimp, rather than initially being significantly below the maximum stocking capacity.

[0031] The invention further includes a method for sorting shrimp in a shrimp hatchery. Preferably, the shrimp are sorted in the shrimp hatchery described above. The method comprises the automated reciprocating movement of a first sorting grid along a first longitudinal direction in a hatchery tank between at least two positions for sorting the shrimp according to their size. It is preferred that a sorting controller actuates a sorting grid drive such that the first sorting grid is reciprocated along the first longitudinal direction of the hatchery tank.

[0032] The method preferably comprises adjusting the fineness of the first sorting grid. The fineness of the first sorting grid is preferably variably adjustable within a range between 2 mm and 30 mm. By adjusting the fineness of the first sorting grid, different size thresholds can preferably be set. The size thresholds can be adjusted such that shrimp with a desired size above a set size threshold cannot pass through the sorting grid. A variably adjustable sorting grid makes it possible to sort shrimp according to different sizes. Furthermore, adjusting the fineness of a second sorting grid and / or further sorting grids is preferred.

[0033] The method preferably comprises positioning a first partition at a first position in the rearing tank. A first tank area is separated from the rest of the tank by means of the first partition. The ratio between the separated, first tank area and the rest of the tank is preferably in a range from 1:1 to 1:10, particularly preferably in a range from 1:1 to 1:5.

[0034] The method preferably comprises positioning the first sorting grid at the first position. The method further comprises moving the first sorting grid towards a first end wall of the rearing tank to scare shrimp with a size above a first size threshold towards the first end wall. Thus, shrimp with a size above the first size threshold are scared towards the first end wall by means of the sorting grid, whereas shrimp with a size below the first size threshold can pass through the sorting grid and thus change sides. In order to preferably only crowd shrimp with a size above the first size threshold between the sorting grid and the first end wall, incentives to change sides can be provided for shrimp with a size below the first size threshold.For example, feed can be provided only on one side of the sorting grid. The shrimp crowded between the sorting grid and the first end wall, which are now preferably of a uniform size, can be fished out or further processed separately from the other shrimp.

[0035] Preferably, the method comprises moving the first sorting grid from the first end wall back to the first position. It is preferred that, before the first sorting grid is moved from the first end wall back to the first position, the shrimp crowded between the sorting grid and the first end wall are removed.

[0036] The method preferably comprises raising the first partition wall to release the first position. In a preferred embodiment, the method comprises moving the first sorting grid away from the first end wall, preferably beyond the first position, preferably toward and / or adjacent to a second end wall of the rearing tank. If the sorting grid is already positioned in the first position, it is moved from the first position, preferably toward and / or adjacent to the second end wall of the rearing tank.

[0037] Preferably, the method comprises positioning a second partition wall at a second position in the rearing tank. The second position is preferably located between the first position and the second end wall of the rearing tank. If the first and second partition walls are positioned in the rearing tank, the rearing tank is thus divided into three areas.

[0038] The method preferably comprises positioning the first sorting grid and / or a second sorting grid at the second position. The method further preferably comprises setting a second size threshold and / or moving the first sorting grid and / or a second sorting grid from the second position to the first position to scare away shrimp with a size that exceeds a second size threshold. In a further preferred embodiment, the method comprises lowering the first partition wall to separate the sorted and scared away shrimp. In the first tank area between the first position and the first end wall, preferably only shrimp with a size that exceeds the second size threshold are collected. The shrimp can then be further processed depending on their size.

[0039] Preferably, the method comprises raising the second partition wall to expose the second position. It is further preferred that the method comprises moving the first sorting grid and / or a second sorting grid away from the first position, via the second position, preferably toward and / or adjacent to the second end wall of the rearing tank. If the sorting grid is already positioned at the second position, it is moved from the second position, preferably toward and / or adjacent to the second end wall of the rearing tank.

[0040] The method preferably comprises positioning the first sorting grid and / or the second sorting grid on the second end wall. In a preferred development, the method comprises moving the first sorting grid or a second sorting grid from the second end wall to the second position to scare away shrimp with a size that exceeds a third size threshold. In a further preferred development, the method comprises lowering the second dividing wall to separate the sorted and scared away shrimp. In a tank area between the second position and the first end wall or, if the first dividing wall is lowered, between the second position and the first position, preferably only shrimp with a size that exceeds the third size threshold are collected. The shrimp of this size can then be further processed depending on their needs.The method preferably comprises raising the first dividing wall to release the first position. The method preferably further comprises raising the second dividing wall to release the second position. In a preferred development, the method comprises moving the first sorting grid and / or a second sorting grid back and forth from the second end wall via the second position and the first position up to the first end wall. With the first dividing wall and the second dividing wall raised, the first sorting grid and / or the second sorting grid can be freely positioned in the rearing tank. After the first sorting grid and / or the second sorting grid have been positioned at the desired positions in the rearing tank, the first dividing wall and / or the second dividing wall are preferably lowered.Furthermore, it is preferred that the first sorting grid and / or the second sorting grid are raised and positioned at any position in the rearing tank.

[0041] Embodiments of the invention will now be described below with reference to the drawings. These are not necessarily intended to represent the embodiments to scale; rather, the drawings are schematic and / or slightly distorted where this is useful for explanation. With regard to additions to the teachings immediately apparent from the drawings, reference is made to the relevant prior art. It should be noted that various modifications and changes to the form and details of an embodiment can be made without deviating from the general idea of ​​the invention. The features of the invention disclosed in the description, in the drawings and in the claims can be essential for the further development of the invention, both individually and in any combination.Furthermore, all combinations of at least two of the features disclosed in the description, the drawings and / or the claims fall within the scope of the invention. The general idea of ​​the invention is not limited to the exact form or detail of the preferred embodiments shown and described below, or limited to an object that would be more limited than the object claimed in the claims. For specified dimensioning ranges, values ​​within the stated limits are also intended to be disclosed as limit values ​​and to be used and claimed as desired. For the sake of simplicity, the same reference numerals are used below for identical or similar parts or parts with identical or similar functions.

[0042] Further advantages, features and details of the invention will become apparent from the following description of the preferred embodiments and from the drawings, which show: Fig. 1 is a schematic representation of a horizontal plane block according to a first embodiment;

[0043] Fig. 2 is a schematic representation of a horizontal plane block according to a second embodiment;

[0044] Fig. 3 is a schematic representation of a shrimp breeding facility according to a first embodiment;

[0045] Fig. 4 is a schematic side view of a shrimp breeding facility according to the first embodiment;

[0046] Fig. 5 is a plan view of a shrimp breeding facility according to a second embodiment;

[0047] Fig. 6 is a plan view of a shrimp breeding facility according to a third embodiment;

[0048] Fig. 7 is a schematic representation of shrimp groups in a rearing tank;

[0049] Fig. 8 is a schematic representation of a sorting grid according to a first embodiment;

[0050] Fig. 9 is a schematic representation of a sorting grid according to a second embodiment;

[0051] Fig. 10 is a schematic representation of a method for sorting shrimp in a breeding tank;

[0052] Fig. 1 1 a detailed view of a partition wall;

[0053] Fig. 12A is a detailed view of a sorting grid according to the second embodiment;

[0054] Fig. 12B is a detailed view of a sorting grid according to the first embodiment;

[0055] Fig. 13 is a detailed view of a sorting grid according to a third embodiment; Fig. 14 is a detailed view of a horizontal plane block according to a further embodiment; and in

[0056] Fig. 15 is a detailed view of the horizontal plane block according to Fig. 14 in a removed state.

[0057] Fig. 1 shows a horizontal plane block 7 with a first horizontal plane 8 and a second horizontal plane 10. The first horizontal plane 8 has a first horizontal plane surface a2. The second horizontal plane 10 has a second horizontal plane surface a2.2. The second horizontal plane 10 is arranged at a vertical distance above the first horizontal plane 8. The first horizontal plane surface a2 corresponds to the second horizontal plane surface a2.2. The first and second horizontal planes 8, 10 are rectangular and each have four corners 42. The two horizontal planes 8, 10 are formed in sections from a mesh material, wherein the mesh material is preferably formed from a polyethylene material. The first and second horizontal planes 8, 10 are identical. The mesh material is held by a horizontal plane frame 44.The horizontal plane frame 44 is preferably formed from a polyvinyl chloride material, but other polymer materials are also possible. The horizontal plane frame 44 is reinforced at the four corners 42. Openings through which round rods 46 are passed are provided at the four reinforced corners 42. The round rods 46 are preferably formed from a glass fiber reinforced plastic. The round rods 46 connect the first and second horizontal planes 8, 10 such that an opening in the first horizontal plane 8 and an opening in the second horizontal plane 10 are arranged coaxially. The first and second horizontal planes 8, 10 are kept at a distance by the round rods 46. It is preferred that the distance between the first horizontal plane 8 and the second horizontal plane 10 is variably adjustable. For this purpose, the first and / or second horizontal planes 8, 10 can be slid up and down as desired along the round rods 46.It is particularly preferred that the distance between the first horizontal plane 8 and the second horizontal plane 10 be fixed. For this purpose, projections can be provided on the round bars 46, for example, which hold the horizontal planes 8, 10 in a desired position. The embodiment shown is not limited to two horizontal planes. More than two horizontal planes, for example, three, four, or more than four horizontal planes, can also be arranged along the round bars.

[0058] Fig. 2 shows a second arrangement of a horizontal plane block 7 with a first horizontal plane 8, a second horizontal plane 10 and a third horizontal plane 12. The first horizontal plane 8 has a first horizontal plane surface a2. The second horizontal plane 10 has a second horizontal plane surface a2.2. The third horizontal plane 14 has a third horizontal plane surface a2.3. The second horizontal plane 10 is arranged at a vertical distance above the first horizontal plane 8. The third horizontal plane 12 is arranged at a vertical distance above the second horizontal plane 10. The first, second and third horizontal planes 8, 10, 12 are rectangular. They are formed in sections from a mesh material, with a large part of the horizontal planes 8, 10, 12 being formed from the mesh material. The first, second and third horizontal planes 8, 10, 12 are identical. The mesh material is held by a horizontal plane frame 44. Fig.2 shows a stand 50 designed to keep the horizontal planes 8, 10, 12 at a distance. To hold the horizontal planes 8, 10, 12, the stand 50 has a stand frame 52. The stand frame 52 is arranged perpendicular to the horizontal planes 8, 10, 12. The horizontal planes 8, 10, 12 are clamped in the stand frame 52. The stand 50 is designed to be placed on a tank floor 4 of a breeding tank 2. The stand 50 has a stand base section 54 for placement on the tank floor 4. The stand base section 54 preferably extends on both sides of the stand frame 52. The stand base section 54 is preferably arranged such that it lies in a plane that is parallel to the horizontal planes 8, 10, 12.

[0059] Fig. 3 shows a schematic representation of a shrimp breeding facility 1 according to a first embodiment. The shrimp breeding facility 1 has a first breeding tank 2 and a second breeding tank 3. The first and second breeding tanks 2, 3 are provided for holding water and shrimp. The first breeding tank 2 has a tank floor 4 with a floor area a1 and a tank wall 6 with a tank wall height HB. The first breeding tank 2 is divided by a first partition wall 26 into a first tank area B1 and a second tank area B2, wherein the ratio between the first tank area B1 and the second tank area B2 is 1:1. The first partition wall 26 preferably does not completely separate the first and second tank areas B1, B2, so that the passage of water is allowed.

[0060] In the first basin area B1, three horizontal planes 8, 10, 12 are arranged, which are set up according to the first embodiment (see Fig. 1 ) in the first basin area B1. The horizontal planes 8, 10, 12 each have a horizontal plane area a2. The ratio between a horizontal plane area a2 and the floor area a1 lies in a range of 0.1 to 0.9. An effective area A e tf for breeding shrimp is calculated for the first tank area B1 as follows: A etf = (1 / 2)*a1 (1 + 3(a2 / a1 )). In the illustrated embodiment, the horizontal planes 8, 10, 12 are arranged substantially centrally in the first tank area B1. This allows the shrimp to swim up and down in the first tank area B1. In addition, space is kept free on each side of the horizontal planes 8, 10, 12 for feeding the animals (illustrated by an arrow in Fig. 3). Furthermore, the shrimp can enter the horizontal plane block 7 from any side and settle down to rest.

[0061] Four horizontal planes 8, 10, 12, 14 are arranged in the second tank area B2, which are set up in the first tank area B1 analogously to the first embodiment (see Fig. 1). The effective area Aetf for shrimp breeding is calculated for the second tank area B2 as follows: Aetf = (1 / 2)*a1 (1 + 4(a2 / a1 )). Since this is the only difference from the first tank area B1, reference is also made to the above description of the first tank area B1.

[0062] The second breeding tank 3 also has a tank floor 4 with a floor area a1 and a tank wall 6 with a tank wall height HB. The second breeding tank 3 is divided by a second partition wall 28 into a third tank area B3 and a fourth tank area B4, with a ratio between the third tank area B3 and the fourth tank area B4 being 1:1. The second partition wall 28 preferably does not completely separate the third and fourth tank areas B3, B4, thus allowing the passage of water.

[0063] In the third tank area B3, five horizontal planes 8, 10, 12, 14, 16 are arranged, which are set up in the first tank area B1 analogously to the first embodiment (see Fig. 1). The effective area Aetf for shrimp breeding is calculated for the third tank area B3 as follows: Aetf = (1 / 2)*a1 (1 + 4(a2 / a1 )). Since this is the only difference from the first tank area B1, reference is also made to the above description of the first tank area B1.

[0064] There are no horizontal planes in the fourth tank section B4. The effective area Aetf for shrimp rearing in the fourth tank section B4 is therefore calculated as follows: Aetf = (1 / 2)*a1 (1 + 0(a2 / a1 )) = (1 / 2)*a1 .

[0065] The shrimp breeding facility 1 according to the embodiment of Figure 3 has a water treatment device 60. The water treatment device 60 is provided for exchanging the water in the tank areas. This is advantageous because the shrimp are sensitive to a lack of oxygen. In addition, the water treatment device 60 cleans the water in the tank area of ​​impurities (feces or leftover food) and / or nitrogen compounds. A first supply line 62 and a first outlet line 72 run between the first tank area B1 and the water treatment device 60 for exchanging the water in the first tank area B1. A second supply line 64 and a second outlet line 74 run between the second tank area B2 and the water treatment device for exchanging the water in the second tank area B2.A third supply line 66 and a third outlet line 76 run between the third basin area B3 and the water treatment device 60 for exchanging the water in the third basin area B3. A fourth supply line 68 and a fourth outlet line 78 run between the fourth basin area B4 and the water treatment device 60 for exchanging the water in the fourth basin area B4.

[0066] Fig. 4 shows a side view of the tank areas B1, B2, B3, B4 described above. In the side view, the first tank area B1, the second tank area B2, the third tank area B3 and the fourth tank area B4 are arranged in a common first rearing tank 2. The first rearing tank 2 has a tank floor 4 and a tank wall 6 with a tank wall height HB and a nominal height HN up to which water is to be filled into the rearing tank 2. The tank wall height HB is preferably in a range from 1 m to 4 m. The nominal height HN is preferably in a range from 0.7 m to 3.8 m. In the exemplary embodiment shown, the nominal height HN is 1.2 m. A first partition wall 26 is arranged between the first and the second tank area B2. A second partition wall 28 is arranged between the second tank area B2 and the third tank area B3.A third partition wall 29 is arranged between the third basin area B3 and the fourth basin area B4. The first, second, and third partition walls 26, 28, 29 are preferably partially permeable. Preferably, the first, second, and third partition walls 26, 28, 29 are designed such that water can pass through the partition walls.

[0067] Three horizontal planes 8, 10, 12 are arranged in the first pool area B1. A first height h1 between the pool floor 4 and the first horizontal plane 8 is preferably in a range from 15 cm to 40 cm, particularly preferably in a range from 20 to 33 cm, in the exemplary embodiment shown the first height h1 is 33 cm. A second height h2 between the first horizontal plane 8 and the second horizontal plane 10 is preferably in a range from 15 cm to 40 cm, particularly preferably in a range from 20 cm to 33 cm, in the exemplary embodiment shown 33 cm. A third height h3 between the second horizontal plane 10 and the third horizontal plane 12 is preferably in a range from 15 cm to 40 cm, particularly preferably in a range from 20 cm to 33 cm, in the exemplary embodiment shown 33 cm. The first, second and third horizontal planes 8, 10, 12 are arranged at equal distances from each other.From the tank floor 4 to the third horizontal plane 12, this results in a height of approximately 1 m. A deck height HD between the third horizontal plane 12 and the nominal height HN is preferably in a range of 10 cm to 30 cm, preferably in a range of 15 cm to 25 cm, and in the illustrated embodiment, 20 cm. The deck height HD should preferably be selected such that shrimp settling on the third horizontal plane 12 are sufficiently covered with water.

[0068] Four horizontal planes 8, 10, 12, 14 are arranged in the second pool area B2. The first height h1 between the pool floor 4 and the first horizontal plane 8 is 25 cm in the exemplary embodiment shown. The second height h2 between the first horizontal plane 8 and the second horizontal plane 10 is 25 cm in the exemplary embodiment shown. The third height h3 between the second horizontal plane 10 and the third horizontal plane 12 is 25 cm in the exemplary embodiment shown. A fourth height h4 between the third horizontal plane 12 and the fourth horizontal plane 14 is preferably in a range from 15 cm to 40 cm, particularly preferably in a range from 20 cm to 33 cm, in the exemplary embodiment shown is 25 cm. The first, second, third and fourth horizontal planes 8, 10, 12, 14 are arranged at equal distances from one another. From the pool floor 4 to the fourth horizontal level 14 there is a height of 1 m.The fourth horizontal plane 14 in the second basin area B2 is at the same height as the third horizontal plane 12 in the first basin area B1. The deck height HD in the second basin area B2 between the fourth horizontal plane 14 and the nominal height HN is 20 cm.

[0069] Five horizontal planes 8, 10, 12, 14, 16 are arranged in the third pool area B3. The first height h1 between the pool floor 4 and the first horizontal plane 8 is 20 cm in the exemplary embodiment shown. The second height h2 between the first horizontal plane 8 and the second horizontal plane 10 is 20 cm in the exemplary embodiment shown. The third height h3 between the second horizontal plane 10 and the third horizontal plane 12 is 20 cm in the exemplary embodiment shown. A fourth height h4 between the third horizontal plane 12 and the fourth horizontal plane 14 is 20 cm in the exemplary embodiment shown. A fifth height h5 between the fourth horizontal plane 14 and the fifth horizontal plane 16 is preferably in a range from 15 cm to 40 cm, particularly preferably in a range from 20 cm to 33 cm, and in the exemplary embodiment shown is 20 cm.The first, second, third, fourth and fifth horizontal planes 8, 10, 12, 14, 16 are arranged at equal distances from one another. The height from the pool floor 4 to the fifth horizontal plane 16 is 1 m. The fifth horizontal plane 16 in the third pool area B3 is at the same height as the fourth horizontal plane 14 in the second pool area B2 and the third horizontal plane 12 in the first pool area B1. The deck height HD in the third pool area B3 between the fourth horizontal plane 14 and the nominal height HN is 20 cm. There are no horizontal planes in the fourth pool area B4.

[0070] The shrimp breeding facility 1 according to Figure 5 has a first breeding tank 2 and a second breeding tank 3. The first and second breeding tanks 2, 3 are arranged parallel to one another.

[0071] The first breeding tank 2 has a first end wall 32 and a second end wall 34. In the exemplary embodiment shown, the first and second end walls 32, 34 have a length of 4 m. However, other lengths, preferably in a range of 1 m to 10 m, are also possible. The first breeding tank 2 further has a first and a second wing wall 36, 38. In the exemplary embodiment shown, the first and second wing walls 36, 38 have a length of 10 m. However, other lengths, preferably in a range of 7 m to 50 m, are also possible. A first partition wall 26 is arranged in the first breeding tank 2 at a first position P1 and separates a first tank area B1, the first tank area B1 being delimited by the first end wall 32 and the first partition wall 26. In the embodiment shown, the first position P1 is 5.3 m away from the first end wall 32, but other distances are also possible.A second dividing wall 28 is arranged in the first breeding tank 2 at a second position P2 and separates a second tank area B2, wherein the second tank area B2 is delimited by the first dividing wall 26 and the second dividing wall 28. In the exemplary embodiment shown, the second position P2 is spaced 3.5 m from the first position P1, but other distances are also possible. In the exemplary embodiment shown, the second position P2 is spaced 1.2 m from the second end wall 34, but other distances are also possible. A third tank area B3 is delimited by the second dividing wall 28 and the second end wall 34. Four horizontal plane blocks 7 are arranged in the first tank area B1 of the first breeding tank 2, wherein the four horizontal plane blocks 7 in the exemplary embodiment shown have a horizontal plane block length HBL of 2 m and a horizontal plane block width HBB of 1.7 m.However, other horizontal plane block lengths HBL and horizontal plane block widths HBB are also possible. The four horizontal plane blocks 7 are arranged at a distance from one another. The four horizontal plane blocks 7 are arranged at a distance from the first end wall 32. The four horizontal plane blocks 7 are arranged at a distance from the first partition wall 26. The four horizontal plane blocks 7 are arranged at a distance from the first and second wing walls 36, 38. Each of the four horizontal plane blocks 7 is thus accessible to shrimp from all sides. Each of the four horizontal plane blocks 7 preferably has five to 10 horizontal planes. Horizontal plane blocks 7 according to Figure 2 are preferably arranged in the first tank area B1 of the first rearing tank 2. The horizontal plane blocks 7 preferably have a first support frame 52 and / or a second support frame 52.The first tank area B1 of the first rearing tank is primarily used to house shrimp that have already outgrown the juvenile phase and prefer to settle on flat surfaces. The four horizontal blocks 7 provide sufficient space for settlement.

[0072] In the second tank area B2 of the first rearing tank 2, two horizontal plane blocks 7 are arranged, wherein the two horizontal plane blocks 7 are arranged at a distance from one another. The two horizontal plane blocks 7 in the second tank area B2 of the first rearing tank 2 are designed identically to the horizontal plane blocks 7 of the first tank area B1; reference is made to the above description for this. Preferably, shrimp of a size that partially swims up and down in the rearing tank and partially retreats into the horizontal plane blocks 7 to rest are arranged in the second tank area B2.

[0073] No horizontal plane blocks are provided in the third tank area B3 of the first rearing tank 2. The third tank area B3 of the first rearing tank 2 is primarily used to house juveniles and larvae, which preferably swim exclusively up and down in the tank. No additional space is required for these animals.

[0074] The second breeding tank 3 according to Fig. 5 is designed similarly to the first breeding tank 2 according to Fig. 5. The difference is that in the first tank area B1, two horizontal plane blocks 7 are arranged adjacent to one another. In addition, the horizontal plane blocks do not have upright frames. In the first tank area B1 of the second breeding tank 3, horizontal plane blocks 7 are preferably arranged according to Figure 1. In the second tank area B2, two horizontal plane blocks 7, preferably horizontal plane blocks according to Figure 1, are arranged adjacent to one another. In the third tank area B3 of the second breeding tank 3, no horizontal plane blocks are provided.

[0075] Fig. 6 shows a plan view of a shrimp breeding facility 1 according to a third embodiment. The difference from the shrimp breeding facility 1 according to Figure 5 lies primarily in the different dimensions. The first and second end walls 32, 34 have a length of 5 m in the embodiment according to Fig. 6. The first and second wing walls 36, 38 have a length of 38 m. The first position P1 is 20 m away from the first end wall 32. The second position P2 is 13.5 m away from the first position P1. The second position P2 is 4.5 m away from the second end wall 34. Twelve horizontal plane blocks 7 are arranged in the first tank area B1 of the first breeding tank 2, the twelve horizontal plane blocks 7 having a horizontal plane block length HBL of 2.2 m and a horizontal plane block width HBB of 2 m in the embodiment shown.In the first tank area B1 of the second rearing tank 3, six horizontal plane blocks 7 with a horizontal plane block length HBL of 4.4 m and a horizontal plane block width HBB of 2 m are arranged, with two horizontal plane blocks 7 being arranged directly adjacent to one another. In the second tank area B2 of the first rearing tank 2, eight horizontal plane blocks are arranged. In the second tank area B2 of the second rearing tank 3, four horizontal plane blocks 7 are arranged, with two horizontal plane blocks 7 being arranged adjacent to one another in the second tank area B2 of the second rearing tank 3. Shrimp rearing systems in which seven, eight, nine, ten, eleven, twelve or more than twelve horizontal plane blocks 7 are arranged are also preferred.

[0076] Fig. 7 shows a schematic representation of shrimp groups in a first rearing tank 2 at two points in time t1, t2. The first rearing tank 2 is divided by means of a first partition wall 26 and a second partition wall 28 into a first tank area B1, a second tank area B2 and a third tank area B3. The partition walls 26, 28 can be positioned at different positions in the rearing tank 2. In addition, the partition walls 26, 28 are preferably arranged so as to be displaceable. By moving the partition walls 26, 28, the tank areas B1, B2, B3 can be adapted to the size of the shrimp group being housed in each case. The three tank areas B1, B2, B3 can also be separated from one another by a sorting grid 20 (cf. Figs. 8, 9). Different groups of shrimp are grouped in the three tank areas B1, B2, B3, whereby the shrimp groups differ from each other, for example, in their size or age.

[0077] At a first time t1, no shrimp group is arranged in the first tank area B1, a shrimp group with shrimp of a size that exceeds a first size threshold is arranged in the second tank area B2, and a shrimp group with shrimp of a size that exceeds a second size threshold is arranged in the third tank area B3.

[0078] At a second time t2, the partition walls 26, 28 were moved. Furthermore, the shrimp were re-sorted. The shrimp group that was located in the second tank area B2 at the first time t1 was divided. The first tank area B1 now contains a shrimp group with a size that exceeds a third threshold, where the third threshold is higher than the first threshold. The second tank area B2 contains shrimp with a size that exceeds the first threshold, and the third tank area B3 contains shrimp with a size that exceeds the second threshold.

[0079] Fig. 8 shows a schematic representation of a sorting grid 20 according to a first embodiment. The first sorting grid 20 is designed to move back and forth along a first longitudinal direction L1 of the rearing tank 2. Guide rails 30 are provided on the tank edges of the first and second wing walls 36, 38. The guide rails 30 extend along the first longitudinal direction L1 of the rearing tank 2. The first sorting grid 20 is preferably arranged from two mutually displaceable grid plates 100, 101 (cf. Fig. 12B). Starting from the sorting grid frame 80, a displacement element 82 extends in the direction of the guide rails 30, wherein the displacement element 82 is supported at least in sections on the guide rail 30. The first sorting grid 20 is guided along the guide rails 30 by means of the displacement elements 82.It is possible to lift the sorting grid 20 together with the moving elements 82 and remove it from the rearing tank 2. Furthermore, Fig. 8 shows a schematic sorting grid drive 22 and a schematic sorting control 24. The sorting control 24 controls the sorting grid drive 22 such that the first sorting grid 20 is moved back and forth along the guide rail 30. It is preferred that the sorting grid drive 22 be coupled to at least one moving element 82. The sorting grid 20, the sorting control 24, and the sorting grid drive 22 form a sorting device 18.

[0080] Fig. 9 shows a sorting grid 20 according to a second exemplary embodiment. A first sorting grid 20 is arranged in a first rearing tank 2. A sorting controller 24 controls a sorting grid drive (not shown in Fig. 9) such that the first sorting grid 20 is moved back and forth along a first longitudinal direction L1 of the first rearing tank 2. A first sorting grid 20 is arranged in a second rearing tank 3. The sorting controller 24 controls a sorting grid drive (not shown in Fig. 9) such that the first sorting grid 20 is moved back and forth along a second longitudinal direction L2 of the second rearing tank 3. The first sorting grid 20 has vertically arranged grid bars 90 (cf. Fig. 12A). The distance between the vertically arranged grid bars 90 is variably adjustable. This allows different size threshold values ​​to be set.The distance between the bars 90 can be moved by means of an actuator 92 connected to the sorting control 24.

[0081] Fig. 10 shows a schematic representation of a method for sorting shrimp in a shrimp hatchery 1. The shrimp hatchery 1 comprises a first hatchery tank 2 with a first end wall 32, a second end wall 34, a first wing wall 36, and a second wing wall 38. In the first hatchery tank 2, a first partition wall 26 is positioned at a first position P1. In the first hatchery tank 2, a second partition wall 28 is positioned at a second position P2.The first rearing tank 2 is divided into a first tank area B1, wherein the first tank area B1 is preferably delimited by the first end wall 32 and the first dividing wall 26, a second tank area B2, wherein the second tank area B2 is preferably delimited by the first dividing wall 26 and the second dividing wall 28, and a third tank area B3, wherein the third tank area B3 is preferably delimited by the second dividing wall 28 and the second end wall 34. At the start of the process V0, shrimp are arranged in the three tank areas B1, B2, B3. A first sorting grid 20 is positioned at the first position P1. The first dividing wall 26 and the first sorting grid 20 are therefore arranged directly adjacent to one another.The first sorting grid 20 can be arranged directly adjacent to a flank of the first partition 26 that is proximal to the first end wall 32 or to a flank of the first partition 26 that is proximal to the second end wall 34. At the start of the method V0, the first sorting grid 20 is arranged directly adjacent to the flank of the first partition 26 that is proximal to the first end wall 32. At the start of the method, the first sorting grid 20 can be automatically moved back and forth between the first position P1 and the first end wall 32 along a first longitudinal direction L1 in a first rearing tank 2.

[0082] In a first method step V1, the first sorting grid 20 is moved toward the first end wall 32 of the first rearing tank 2 to scare away shrimp with a size above a first size threshold. Shrimp with a size above the first size threshold are forced toward the first end wall 32. Shrimp with a size below the first size threshold can pass through the first sorting grid 20 and change sides of the first sorting grid 20. The crowded area between the first end wall 32 and the first sorting grid 20 preferably contains exclusively shrimp with a size above the first threshold. The first threshold can be selected such that the scared-away shrimp have a size that is oriented towards market requirements. The scared-away shrimp are preferably fished out.

[0083] In a second method step V2, the first partition wall 26 is raised to release the first position P1. The first sorting grid 20 can be moved away from the first end wall 32 beyond the first position P1, preferably in the direction of and / or adjacent to a second end wall 34 of the first breeding tank 2. In the second method step V2, the first sorting grid 20 is moved from the first end wall 32 to the second position P2. Alternatively, it is preferred that the first sorting grid 20 is raised and positioned at the second position P2. The second partition wall 28 and the first sorting grid 20 are thus arranged directly adjacent to one another. The first sorting grid 20 can be positioned directly adjacent to a flank of the second partition wall 28 that is proximal to the first end wall 32 or to a flank of the second partition wall 28 that is proximal to the second end wall 34.In the second method step V2, the first sorting grid 20 is moved from the first end wall 32 to the second position P2, so that the first sorting grid 20 and the flank of the second partition wall 28 proximal to the first end wall 32 are arranged adjacent to one another.

[0084] In a third method step V3, the first sorting grid 20 is moved from the second position P2 to the first position P1 to scare away shrimp with a size that exceeds a second size threshold. Shrimp with a size above the second threshold are pushed towards the first end wall 32. Shrimp with a size below the second threshold can pass through the first sorting grid 20 and change sides of the first sorting grid 20. The third method step V3 preferably comprises lowering the first dividing wall 26 to separate the sorted and scared away shrimp. In the first tank area B1 between the first position P1 and the first end wall 32, preferably only shrimp with a size that exceeds the second size threshold are collected. The shrimp can then be further processed depending on their size.The first sorting grid 20 is now preferably positioned adjacent to the flank of the first partition wall 26 proximal to the second end wall 32.

[0085] In a fourth method step V4, the second partition wall 28 is raised to expose the second position P2. The first sorting grid 20 can be moved away from the first position P1 via the second position P2, preferably toward and / or adjacent to the second end wall 34 of the first breeding tank 2. Alternatively, it is preferred that the first sorting grid 20 is raised and positioned against the second end wall 34.

[0086] In a fifth method step V5, the first sorting grid 20 is moved from the second end wall 34 to the second position P2 to scare away shrimp with a size that exceeds a third size threshold. Shrimp with a size below the third size threshold can change sides of the first sorting grid 20 and are not pushed toward the first end wall 32. The fifth method step V5 further comprises lowering the second partition wall 28 to separate the sorted and scared shrimp. Preferably, only shrimp with a size that exceeds the third size threshold are now collected in the second tank area B2. The shrimp of this size can then be further processed depending on their needs.

[0087] In a sixth process step V6, the third tank area B3 can be filled with young shrimp larvae. The first sorting grid 20 can be raised and positioned at the first position P1.

[0088] In this process, either the horizontal plane blocks 7 can remain in the tank and a sorting grid can be used, as shown in Fig. 13. Alternatively, it is also possible and preferred to first remove the horizontal plane blocks 7 from the tank and then carry out the process.

[0089] Fig. 11 shows a detailed view of a partition wall 26, 28 in an open position and in a closed position. A lifting device 40 is provided for selectively raising and lowering the partition wall 26, 28. The partition wall 26, 28 is provided to separate a first tank area B1 in a first and / or second breeding tank 2, 3 (cf. Fig. 5). When the partition wall 26, 28 is raised, shrimp can leave the first tank area B1 and / or shrimp can enter the first tank area B1. The partition wall 26, 28 is formed at least in sections from a net material. Preferably, the net material of the partition wall 26, 28 is formed at least partially from a polyethylene material, particularly preferably at least partially from a high-density polyethylene material.In a preferred embodiment, the mesh material is formed at least partially from a glass fiber fabric, preferably coated with polyethylene material, or from a nylon gauze. A mesh size of the mesh material preferably allows the passage of water but prevents the passage of animals. The partition wall 26, 28 thus enables the water exchange between two areas of a rearing tank 2, which are separated from each other by the partition wall 26, 28.

[0090] Fig. 13 shows a sorting grid 20 according to a third embodiment. The sorting grid 20 has a plate 199 with a plurality of openings 200. The size of the openings 200 is preferably variably adjustable. The sorting grid 20 has horizontal recesses 202, which are preferably arranged at the level of the horizontal planes 8, 10, 12, 14, 16. The horizontal recesses 202 preferably have seals so that the horizontal recesses 202 do not form unwanted escape routes for animals. The sorting grid 20 further has a vertical recess 204. The vertical recess 204 is arranged such that it is axially flush (with the flange axis extending into the view of Fig. 13) with the upright frame 52 of the horizontal plane block 7. It is preferred that the vertical recess 204 has a seal for sealing against the stand frame 52.Overall, the sorting grid 20 is designed such that it can move through the horizontal plane block 7.

[0091] Figures 14 and 15 illustrate a variant of a horizontal plane block 7 as can preferably be used within the scope of the invention. Identical and similar elements are provided with the same reference numerals as in the previous embodiments. The following primarily highlights the differences from the previous embodiments. In contrast to the previous embodiments, the horizontal plane block according to Figs. 14, 15 is not designed to be placed on a pool floor, but rather to be supported at least partially in a suspended manner. The horizontal plane block 7 is arranged in the pool so that it can move freely horizontally. Specifically, the horizontal plane block 7 according to this exemplary embodiment has at least one float 302, preferably three floats 302, 303, 304, so that the horizontal plane block 7 floats stably in the water.The floats 302, 303, 304 are designed in such a way that even when the horizontal plane block 7 is fully populated with shrimp, it can still be supported by the floats 302, 303, 304.

[0092] Connected to each of the floats 302, 303, 304 is a flexible suspension 306, 307, 308, which may be designed, for example, as a rope, chain, band, or the like. In contrast to the embodiment described above, no rod is provided here, since the flexible suspensions 306, 307, 308 do not have to transmit any compressive forces, but rather the horizontal planes 8, 10, 12, 14, 16 are supported by the floats 302, 303, 304. The horizontal planes 8, 10, 12, 14, 16 are connected to the flexible suspensions

[0093] 306, 307, 308 to be carried by them.

[0094] In contrast to the previous embodiment, the horizontal planes 8, 10, 12, 14, 16 are not rectangular, but round, which allows them to be stably held on the flexible suspensions 306, 307, 308. However, the round shape is only optional, and any other shape, such as polygonal, can be used. Preferably, a horizontal plane frame 44 (only one is provided with a reference numeral in Fig. 14) is also partially flexible, preferably formed from a resilient material, such as a tent pole. The plane itself is preferably formed from the mesh material as described above.

[0095] Depending on the size of the horizontal planes 8, 10, 12, 14, 16, four or more floats and / or four or more flexible suspensions can be provided.

[0096] To increase stability in the water, in the embodiment shown here, sinker weights 310, 311, 312 are provided at the lower end of the flexible suspensions 306, 307, 308. However, it is not necessary that each of the flexible suspensions 306,

[0097] 307, 308, a separate counterweight 310, 311, 312 is provided; rather, a common, for example, ring-shaped counterweight can also be provided. Optionally, the flexible suspensions 306, 307, 308 can also be reversibly and detachably anchored in the basin floor, for example, at anchors provided for this purpose.

[0098] The horizontal plane block 7 also has a handle 320 which comprises a first and a second lifting strap 321, 322. By means of the handle 320, the horizontal plane block 7 can be lifted out of the tank, as illustrated in Fig. 15. The individual horizontal planes 8, 10, 12, 14, 16 can be folded together thanks to the flexible suspensions 306, 307, 308 and thus take up little space. The handle 320 is attached to the side of the horizontal plane block 7, as shown in Fig. 15, so that the individual horizontal planes 8, 10, 12, 14, 16 pivot from the horizontal position into a vertical position when the horizontal plane block 7 is removed by means of the handle 320. This is advantageous because shrimp sitting on the horizontal planes slide into the tank and are not lifted out with them.

[0099] Several of the horizontal plane blocks 7 according to the embodiment of Figures 14 and 15 can be provided in the tank. The horizontal plane blocks 7 do not have to have five horizontal planes, but rather any desired number from 1 to preferably 10, whereby embodiments with more than 10 horizontal planes are also possible. It can also be provided that horizontal plane blocks 7 of different embodiments are provided in a mixture in the tank. The horizontal plane blocks 7 according to this embodiment can be particularly easily removed from the tank before the above-described method for scaring the shrimp is carried out.

Claims

Claims 1. Shrimp rearing facility (1) for raising shrimp, comprising at least one first rearing tank (2) for receiving water and shrimp, wherein the first rearing tank (2) comprises a tank bottom (4), a tank wall (6), a first end wall (32) and a second end wall (34) and has a tank wall height (HB) and a nominal height (HN) up to which water is to be poured into the first rearing tank (2);a sorting device (18) for sorting the shrimp according to their size in the first rearing tank (2), wherein the sorting device (18) comprises at least a substantially vertically arranged first sorting grid (20), a sorting grid drive (22) and a sorting control (24), and at least one first partition (26) that can be selectively arranged in the first rearing tank (2) for selectively separating a first tank area (B1) and a second tank area (B2), wherein the sorting control (24) controls the sorting grid drive (22) such that the first sorting grid (20) is moved back and forth along a first longitudinal direction (L1) of the first rearing tank (2).

2. Shrimp breeding facility (1 ) according to claim 1 , comprising at least one first horizontal plane (8) which is arranged in the first breeding tank (2) at a vertical distance to the tank floor (4) and has a first horizontal plane surface (a2) which is at least 1 / 10 smaller than a floor surface (a1 ) of the tank floor (4).

3. Shrimp breeding facility (1 ) according to claim 2, wherein the first horizontal plane (8) is formed at least partially from a mesh material.

4. Shrimp rearing facility (1 ) according to one of the preceding claims 2 or 3, comprising a second horizontal plane (10) which is arranged vertically spaced above the first horizontal plane (8) in the first rearing tank (2).

5. Shrimp breeding facility (1 ) according to any one of the preceding claims 2 to 4, wherein a first height (h1 ) between the tank bottom (4) and the first horizontal plane (8) is in a range of 15 cm to 40 cm.

6. Shrimp breeding facility (1 ) according to claim 4, wherein a second height (h2) between the first horizontal plane (8) and the second horizontal plane (10) is in a range of 15 cm to 40 cm.

7. Shrimp breeding facility (1 ) according to any one of the preceding claims 2 to 6, wherein the ratio a2 / a1 of the first horizontal plane surface (a2) and the bottom surface (a1 ) is in a range of 0.1 to 0.

9.

8. Shrimp breeding plant (1) according to one of the preceding claims, wherein the first sorting grid (20) has a fineness in a range of 2 mm to 30 mm.

9. Shrimp breeding plant (1 ) according to one of the preceding claims, comprising a guide rail (30) for guiding and supporting the first sorting grid (20).

10. Shrimp breeding plant (1 ) according to one of the preceding claims, wherein the fineness of the first sorting grid (20) is variably adjustable, and wherein the sorting control (24) is configured to adjust the fineness of the first sorting grid (20). 1 1. Shrimp breeding facility (1 ) according to one of the preceding claims, comprising a lifting device (40) for selectively raising and lowering the first partition wall (26).

12. Shrimp breeding facility (1 ) according to one of the preceding claims, comprising a second partition (28) that can be selectively arranged in the first breeding tank (2) for the selective separation of a second tank area (B2) and a third tank area (B3).

13. Shrimp breeding plant (1 ) according to one of the preceding claims, wherein the first sorting grid (20) is designed such that it can pass through the at least first horizontal plane (8).

14. Shrimp breeding plant (1 ) according to one of the preceding claims, wherein the first sorting grid (20) has at least one first horizontal recess (202) which is arranged at the level of the at least first horizontal plane (8).

15. Shrimp breeding facility (1 ) according to claim 14, wherein the at least first horizontal recess (202) has a seal for sealing against the first horizontal plane (8).

16. Shrimp breeding facility (1 ) according to any one of the preceding claims 2 to 7, wherein the first horizontal plane is suspended floating in the tank.

17. Shrimp breeding facility (1 ) according to claim 16, wherein the first horizontal plane (8) is connected to at least one first float (302) and is preferably loaded with at least one first sinking weight (310).

18. Shrimp breeding facility (1 ) according to claim 16 or 17, comprising a handling device (320) for selectively lifting the first horizontal plane (8), wherein the handling device (320) interacts with the first horizontal plane (8) in such a way that the horizontal plane (8) is rotated into a vertical position when being lifted.

19. Shrimp breeding plant (1 ) according to one of the preceding claims, wherein the sorting control (24) is configured to carry out a method according to one of claims 20 to 32.

20. Method for sorting shrimp in a shrimp rearing facility (1), preferably according to one of the preceding claims, comprising the steps: - automated back-and-forth movement of a first sorting grid (20) along a first longitudinal direction (L1 ) in a first rearing tank (2) between at least two positions for sorting the shrimp according to their size.

21. Method according to claim 20, comprising: - Setting a fineness of the first sorting grid (20).

22. Method according to claim 20 or 21, comprising: - Positioning a first partition (26) at a first position (P1) in the first rearing tank (2).

23. Method according to any one of claims 20 to 22, comprising: - Positioning the first sorting grid (20) at the first position (P1) and moving the first sorting grid (20) towards a first end wall (32) of the first rearing tank (1) to scare shrimp with a size above a first size threshold towards the first end wall (32).

24. The method of claim 23, comprising: -Moving the first sorting grid (20) from the first end wall (32) back to the first position (P1 ).

25. Method according to any one of claims 22 to 24, comprising: - Lifting the first partition (26) to release the first position (P1).

26. Method according to any one of claims 20 to 25, comprising: - Moving the first sorting grid (20) away from the first end wall (32) preferably beyond the first position (P2), preferably in the direction of and / or adjacent to a second end wall (34) of the first rearing tank (2).

27. Method according to any one of claims 20 to 26, comprising: - Positioning a second partition (28) at a second position (P2) in the first rearing tank (2).

28. The method of claim 27, comprising -Positioning the first sorting grid (20) and / or a second sorting grid (21) at the second position (P2); and / or - Moving the first sorting grid (20) and / or the second sorting grid (21) from the second position (P2) to the first position (P1) to scare away shrimp exceeding a second size threshold; and / or - Lowering the first partition (28) to separate the sorted and disturbed shrimp.

29. The method of claim 27 or 28, comprising: -Lifting the second partition wall (28).

30. Method according to any one of claims 20 to 29, comprising: -Moving the first sorting grid (20) and / or a second sorting grid (21) away from the first position (P1) preferably beyond the second position (P2), preferably in the direction of and / or adjacent to the second end wall (34) of the first rearing tank (2).

31. Method according to claim 30, comprising: -Positioning the first sorting grid (20) and / or a second sorting grid (21) on the second end wall (34); and / or - Moving the first sorting grid (20) and / or the second sorting grid (21) from the second end wall (34) to the second position (P2) to scare away shrimp exceeding a third size threshold; and / or - Lowering the second partition (28) to separate the sorted and chased shrimp.

32. Method according to any one of claims 27 to 31, comprising: - Lifting the first partition (26) to release the first position (P1); and / or - Lifting the second partition (28) to release the second position (P2); and / or - Moving the first sorting grid (20) and / or a second sorting grid (21) back and forth from the second end wall (34) via the second position (P2) and the first position (P1) to the first end wall (32).

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