SYSTEM FOR THE BREEDING OF SHELLFISH BIVULVOUS MOLLUSCS COMPRISING A BAG AND A MEANS OF ATTACHMENT TO A TABLE

Abstract

SYSTEM FOR THE FARMING OF SHELLFISH BIVALVE MOLLUSCS COMPRISING A BAG AND A MEANS OF ATTACHMENT TO A TABLE. System for oyster farming comprising: a bag (2) for containing shellfed bivalve molluscs and adapted to be attached to a retaining bar of a farming table; a tubular retaining element (22) placed in the bag to allow attachment of said bag to a retaining bar of a farming table; an attachment system (1) for attaching the tubular retaining element to the retaining bar, said attachment system comprising: a part (4) comprising two rings; a movable cleat (10) adapted to be inserted into at least one ring of the part and intended to be held in contact with said ring by a tie; a tie intended to be attached to the movable cleat and to the retaining bar of the table. Figure for the abstract: Fig. 2

Description

Title of the invention: SYSTEM FOR THE FARMING OF SHELLFISH BIVULVOUS MOLLUSCS COMPRISING A BAG AND A MEANS OF ATTACHMENT TO A TABLE Scope of the invention

[0001] The invention relates to the field of systems for securing bags intended to contain shelled bivalve molluscs for their rearing at sea, said bags being moored or fixed to a table called a "rearing table" located at sea. More particularly, the invention relates to systems that allow both the securing of said bags and controlled movement of said bag subjected to the tides. These systems also allow for a secure grip on said bag during maneuvers of removal or securing to the rearing table. State of the art

[0002] Currently, there are numerous solutions for attaching a bag intended to contain shelled molluscs for their rearing to a rearing table positioned on a seabed. These bags can be arranged horizontally or vertically.

[0003] In all cases, detaching or attaching a bag to a table positioned at sea requires manual operations that are difficult to perform due to the weight of the filled bags. It is often difficult for an oyster farmer to have a good grip on the bags to be attached or detached from the rearing table.

[0004] Finally, some pockets are harnessed or fixed in such a way that the durations of the detachment and attachment operations constitute an obstacle to carrying out this action in a limited time and repeatedly. Summary of the invention

[0005] A first object of the invention relates to a system for the rearing of shelled bivalve molluscs comprising: • a bag intended to contain shelled bivalve molluscs and suitable for being attached to a retaining bar of a rearing table, said bag being formed by a net and having at least one upper opening for the passage of a fastening means; • a tubular retaining element placed inside the pouch to allow the pouch to be attached to a retaining bar on a rearing table, • at least one fastening system for attaching the tubular support element to the retaining bar of a rearing table, said fastening system comprising: • a part comprising two rings, each having a central passage for the passage of, on the one hand, the tubular retaining element and, on the other hand, a movable cleat; • a movable cleat adapted to be inserted into at least one ring of the part and intended to be held in contact with said ring by a link, said movable cleat having a central area adapted to form a winding guide for the passage of the link, • a link intended to be fixed on one side to the movable cleat and on the other side to the retaining bar of the breeding table.

[0006] One advantage is to allow better gripping of the bag during the operations of installing a bag on a rearing table or during the removal of said bag.

[0007] According to a first embodiment of the system according to the invention, the two rings of the part are arranged in two perpendicular planes. One advantage is to promote a rocking motion of the bag with the movement of the sea in a direction transverse to the retaining bar and to facilitate the movement to extract the bag from the rearing table or to arrange the latter on the rearing table in a direction substantially parallel to the retaining bar.

[0008] According to a second variant of the system according to the invention, the two rings of the part are arranged along two non-coplanar planes.

[0009] The invention also relates to the following embodiments. Those skilled in the art will understand that each of the features of the following embodiments can be combined independently with the above features, and also with each other without constituting an intermediate generalization.

[0010] According to a first embodiment of the invention, the part is a single-piece polymer part. One advantage is that it improves the robustness of the fastening system.

[0011] According to a second embodiment of the invention, at least one of the rings of the part is oval or elliptical in shape, preferably the ring through which the link passes is oval or elliptical in shape.

[0012] According to a third embodiment of the invention, the movable cleat includes at least one lateral guide facilitating the retention of a link on said movable cleat, said link being intended to be wrapped around the central portion of the movable cleat.

[0013] According to a fourth embodiment of the invention, at least one lateral guide has a notch allowing the link to be inserted or removed from the lateral guide of the movable cleat.

[0014] According to a fifth embodiment of the invention, the movable cleat comprises two lateral guides arranged on either side of the central portion of the movable cleat, the two guides forming a rectangular area and both being coplanar.

[0015] According to a sixth embodiment of the invention, the movable cleat has two ends, at least one of which has a thinning of its thickness facilitating its insertion into a ring of the part.

[0016] According to a seventh embodiment of the invention, the movable cleat has a profile with a cross-section considered transversely to its largest dimension having a width and a height, the maximum width being less than the maximum height of the profile so as to allow the movable cleat to be introduced into a ring of the part according to a limited number of orientations of the movable cleat around its axis parallel Ao to its largest dimension.

[0017] According to an eighth embodiment of the invention, the link is a flexible elastic band forming a loop and having a rectangular section preferably with a thickness of less than 1cm.

[0018] According to a ninth embodiment of the invention, the link is made of rubber.

[0019] According to a tenth embodiment of the invention, the link is a strap.

[0020] According to an eleventh embodiment of the invention, the pocket comprises two lateral portions, preferably rectangular, forming the largest surfaces of said pouch, said portions being intended to extend in a substantially vertical plane when the pouch is fixed to a rearing table, said lateral portions being mobile around the retaining bar according to a pendulum motion obtained through the flexibility of the link.

[0021] According to a twelfth embodiment, the system of the invention includes a buoyancy reserve preferably fixed on the lower part of the pocket.

[0022] According to a thirteenth embodiment, the system of the invention comprises two fastening systems.

[0023] A second object of the invention relates to a table for the rearing of shelled bivalve molluscs comprising uprights, retaining bars and at least one system for the rearing of shelled bivalve molluscs according to the invention. Brief description of the figures

[0024] Other features and advantages of the invention will become apparent from the following detailed description, with reference to the accompanying figures, which illustrate: • [Fig-1]: an example of the realization of a fixation of a plurality of bags to a rearing table obtained by means of the fixation system of the invention; • [Fig.2]: an example of the implementation of a fixing of a bag to a rearing table obtained using the fixing system of the invention; • [Fig.3]: a cross-sectional view of a movable cleat of the invention intended to form a retaining element in contact with a part comprising two rings for suspending a bag from a rearing table; • [Fig.4]: a first 3D view of a movable cleat of the invention intended to form a retaining element in contact with a part comprising two rings for suspending a bag from a rearing table; • [Fig.5]: a second 3D view of a movable cleat of the invention intended to form a retaining element in contact with a part comprising two rings for suspending a bag from a rearing table; • [Fig.6]: a cross-sectional view of a part comprising two rings for the passage of a tubular element and a movable cleat of the invention; • [Fig.7]: a 3D view of a part comprising two rings for the passage of a tubular element and a movable cleat of the invention.

[0025] In this text, expressions such as "horizontal", "vertical", "upper part", "lower part" are used.

[0026] When referring to the rearing table, these expressions must be interpreted in a relative manner, in relation to the normal position of a table positioned on the seabed.

[0027] When referring to the bag, these expressions must be interpreted in a relative manner, in relation to a position of the bag suspended from a rearing table, in the absence of water: the upper part being as close as possible to the retaining bar 32 and the lower part being as close as possible to the seabed.

[0028] A "movable stop" is called: a retaining element intended to be positioned in contact with the part comprising two rings, said movable stop is able to be inserted into one of the rings and positioned in contact with the part (pressed against the part) so as not to pass back through the ring under the effect of the stress applied to it.

[0029] The system according to the invention comprises a "part comprising two rings", each ring having a central passage.

[0030] Figure 1 shows a rearing table 3 with two pockets, each comprising at least one fastening system according to the invention. Such a rearing table 3 is suitable for oyster farming and can also be adapted for other shelled bivalve molluscs. This description describes the specific case of oyster farming but is not limited to it. Table

[0031] The rearing table 3 of [Fig. 1] comprises a set of substantially vertical uprights 31 and substantially horizontal retaining bars 32, enabling the definition of a stable structure at sea. Advantageously, at least one of the retaining bars 32 is provided with a tubular element 30. Advantageously, the table comprises a series of retaining bars 32, at least one of which is provided with a tubular element 30 allowing the attachment of one or more straps. 5, the tubular elements 30 being placed around the retaining bars 32. The links 5 are preferably straps or bands. The links 5 may be made of an elastic material such as rubber. One advantage of such a tubular element 30 is that it allows rotation of this element around a retaining bar 32 of the rearing table 3 and limits wear on said link 5.

[0032] According to a non-preferred embodiment, the tubular element 30 is not present, the link 5 is then directly fixed around an upright 32 of the rearing table 3.

[0033] Figure 1 shows various examples of how to attach a pouch 2 to the rearing table 3. The pouch 2 on the left in the foreground of Figure 1 includes one attachment system of the invention. The pouch 2 on the right includes two attachment systems according to the invention. The movable cleat 10 retains the strap 5 on one side of part 4 by making contact with said part 4, so that the strap 5, which passes through one of the rings, is held in place to allow the pouch 2 to be suspended. Poached

[0034] The pocket 2 preferably comprises a net 20, preferably rigid or semi-rigid, and is suitable for use, particularly when suspended, under the conditions of the invention without undergoing deformation. The net 20 has openings whose dimensions allow the passage of seawater while retaining the shellfish inside the pocket.

[0035] The bag 2 can thus be in free suspension relative to the rearing table 3. An advantage is to allow a natural movement of the bag under the effect of the movements of the sea.

[0036] According to one embodiment, the pocket is a flexible and / or rigid mesh structure, extruded and / or injected. Tubular retaining element

[0037] The pouch 2 is equipped with a tubular retaining element 22 arranged at the top of the pouch 2. This tubular retaining element 22 is held in contact with the top surface of the pouch 2 by means of part 4 comprising two rings 41, 43 with central passages 42, 44, one of the central passages 44 being designed to receive the tubular retaining element 22 positioned in the pouch. For this purpose, part 4 is partially positioned in the pouch 2 by means of an opening 21 in the top of the pouch 2. One advantage is that it allows the pouch to be held in place without deforming it locally. Indeed, the tubular retaining element 22 distributes the forces along the length of the top surface of the pouch 2.

[0038] According to various examples, the tubular retaining element 22 has a circular, oval or polygonal cross-section. Buoyancy reserve

[0039] The pocket 2 may include a buoyancy reserve 25 preferably positioned in the lower part of the pocket 2.

[0040] This buoyancy reservoir, also called a float, can be open and alternately filled with air or water, depending on the tide. In this configuration, the buoyancy reservoir can be fitted with screw-on / screw-off caps. The buoyancy reservoir is then adjustable, meaning that its Archimedean buoyancy variable can be adjusted to allow the pocket 2 to move from a vertical position with said buoyancy reservoir 25 near the seabed to a horizontal position with said buoyancy reservoir approximately at the height of the retaining bar 32, and then to an inverted vertical position with said buoyancy reservoir 25 in the position furthest from the seabed.

[0041] The buoyancy reserve thus allows the bag to be turned over with each tidal cycle. This turning of the bag allows the oysters to move within the bag and consequently to be mixed. The buoyancy reserve therefore eliminates the need for the daily manual turning of the bags, which is generally carried out by oyster farmers to ensure superior shellfish quality.

[0042] Another advantage of the system according to the present invention is therefore to allow the production of quality oysters.

[0043] The buoyancy chamber can be closed. In this case, it is generally filled with water and then acts as ballast or a shock absorber to prevent or limit the movement of the bag. This configuration is particularly useful when the oysters are mature and it is necessary to avoid stressing them.

[0044] In a particular configuration, the buoyancy reserve 25 is attached to the lower surface of the pocket 2, for example, to the inner or outer surface of the pocket. In one example, straps forming ties pass through openings in the pocket 2 and wrap around the buoyancy reserve 25. Other attachment methods may be used alternatively. fastening system

[0045] Figure 2 shows a 3D view of an example embodiment of a fastening system of the invention. In this example, a part 4 having a double ring 41, 43 is used to, on the one hand, retain the tubular retaining element 22 inserted within the pocket 2 and, on the other hand, retain a link 5 passing within an opening of the part 4 by means of a movable stop 10 placed opposite the opening of the part 4 around which the link 5 is wound.

[0046] Fig. 2 represents a tubular element 30 of a rearing table 3 around which the link 5 is wound.

[0047] The fastening system of the invention allows the pocket 2 to be fixed to the retaining bar 32 by means of the tubular element 30. For this purpose, the fastening system includes a link 5 used on the one hand to form a knot around the tubular element 30 and on the other hand to maintain a movable cleat 10 in contact with a part 4 fixed to the tubular retaining element 22.

[0048] Part 4 has a dual role in forming the connecting piece between the tubular retaining element 22 and the movable cleat 10 attached to the link. To fulfill this dual role, this part 4 comprises two rings 41, 43, each with a central passage 42, 44. Advantageously, the pocket 2 of the invention has an upper opening 21 allowing the passage of part 4 into the pocket 2. The portion of part 4 within the pocket 2 is used for the passage of the tubular retaining element 22 through the central passage 44 of the ring 43 of said part 4. Part 4 has a portion outside the pocket 2 for the passage of the movable cleat 10 attached to the link 5 through the central passage 42 of the ring 41. Generally, the ring 41, called the working ring, has a larger diameter than the ring 43. Link

[0049] According to one example, the link forms a closed loop. According to one embodiment, a lark's head knot can be made with the link 5 around the retaining bar 32. According to other examples, other mooring knots can be made with the link 5 around the retaining bar 32, such as an arabesque knot.

[0050] According to one embodiment, the link 5 is positioned on the retaining bar 32, optionally equipped with a tubular element 30, and a knot is formed so that the link 5 is fixed to the bar 32 and has a portion that can be manipulated to be inserted into a ring of the part 4. In a second step, the movable stop 10 is inserted into the loop formed by the link. For this purpose, the movable stop 10 may have a central area 15 for receiving the link 5 in order to position it and hold it in contact with the movable stop 10. In a third step, the movable stop 10 wrapped with the link 5 can be inserted into the central opening 42 of the ring 41 of the part 4.

[0051] Alternatively, the link 5 can first be passed through the ring 41 of the part 4 and the movable cleat 10 can be positioned on the link after it has passed through the central passage 42 of the ring 41 of the part 4. Finally the link is positioned on the retaining bar 32.

[0052] According to a first mode, the link 5 is a rigid non-elastic link, for example made of canvas or rope.

[0053] According to a second mode, the link is made of elastic material.

[0054] According to one embodiment, the link is a cable or an elastic cord of type of tensioner such as that of the brand "Sandow".

[0055] According to a first example, the link 5 can be made of natural rubber. This material exhibits elasticity while offering good resistance to reversible deformation, as well as good wear resistance. Finally, this material allows for elastic deformation, enabling shock absorption.

[0056] According to a second example, the link 5 can be made of synthetic rubber of the butadiene and styrene copolymer type ("Styrene Butadiene Rubber" in English). This rubber exhibits good resistance to abrasion and bending, with elasticity similar to natural rubber.

[0057] According to a third example, the link 5 can be made of polyurethane. This material offers good tensile and tear strength while also having good elasticity. In addition, it is highly resistant to wear, weathering, and repeated bending.

[0058] According to a fourth example, the link 5 can be made of silicone which has good elasticity and resistance to deformation, with good thermal resistance.

[0059] According to a fifth example, the link 5 can be made of a thermoplastic elastomer which can be chosen for recycling considerations.

[0060] According to a sixth example, the material chosen for link 5 can be a polychloroprene-based rubber of the Neoprene® type. Such a material can offer good elasticity with high weather resistance. Movable cleat

[0061] Figure 3 shows an example of an embodiment of a movable stop 10 of the invention forming a part with a larger dimension along its length and extending along the axis A0 shown in Figure 3. The movable stop 10 has a width adapted for its passage through at least one ring 41 of the part 4. According to one example, the transverse dimensions of the movable stop 10 are adapted for passage through the ring 41, which may, for example, have an oval or circular cross-section.

[0062] The movable cleat 10 preferably includes a central zone 15 adapted to retain a strap 5. To this end, the central zone 15 includes at least one guide 11 so that the strap 5 does not slip along the movable cleat 10. The guide 11 is, for example, formed by a generally rectangular opening so that it is adapted to a strap 5 in the shape of a band or a strap. According to other embodiments, the opening of the guide 11 may have a generally circular, oval, or polygonal shape. Preferably, the guide 11 includes a side extending along a central portion 16 along the principal axis A0 of the movable cleat 10, this central portion 16 being adapted for winding the strap 5, which may be in the shape of a band, for example.

[0063] According to one embodiment, the opening of the guide 11 has a notch 12 for the passage of the link 5 in the guide 11 so that it can be inserted and removed from the guide 11 according to a specific handling procedure, for example by following the orientation of notch 12. Notch 12 is, for instance, made at a beveled angle. This angle helps prevent accidental removal of the strap 5 from the guide 11, for example, when weather conditions cause random movement of the pocket 2. Furthermore, the angle facilitates insertion because, when the strap forms a band, its insertion naturally aligns the strap with the longest dimension of the guide 11.

[0064] In one embodiment, the movable cleat 10 comprises two guides 11, 13 positioned on either side of its main axis AO. In one embodiment, the two guides 11, 13 have similar or nearly identical geometric and dimensional characteristics. One advantage is that they allow for a uniform reinforcement of the connection 12 around the movable cleat 10. In one example, the two guides 11 and 13 form openings whose respective surfaces lie in the same plane. Each guide 11, 13 has a notch 12 and 14, respectively. In one embodiment, the two lateral portions on either side of the axis AO and extending transversely to the axis AO are substantially flat and symmetrical with respect to the axis AO. In other words, a cutting plane perpendicular to the axis AO forms a cross.In this configuration, the movable cleat 10 comprises an extension in its width direction, which lies in a plane, and an extension in its height direction, which also lies in a plane. These two planes are substantially perpendicular. The present invention is not limited to a particular geometric design of the movable cleat 10, which can be manufactured according to different geometries. However, the detailed example presents numerous advantages for reinforcing the attachment of a pocket to a retaining bar 32.

[0065] Figure 4 shows an example of an embodiment in 3D view, of which Figure 3 is a view cutting. In this figure, an example of a movable stop 10 is shown, the height of which is greater than the width of the part 10. This configuration limits the possibilities of the movable stop 10 penetrating the oval-section ring 42 of the part 4. This design of the movable stop 10 and the ring 42 acts as a keying device, preventing an operator from using parts 10 and 4 in other ways.

[0066] The movable cleat 10 of [Fig. 4] has a groove visible on its central portion 16 along its width, which also guides the link 5 so that it is held on this portion of the movable cleat 10. Such a groove may be present on both sides of the axis A0. The central area 16 may have symmetry with respect to the axis A0.

[0067] According to one embodiment, at least one end 17 or 18 of the movable cleat 10 may have a reduction in the dimensions of its considered section transversely to its largest dimension. One advantage is to present an end that can be easily inserted into a ring 42 of part 4. According to a preferred example, the movable cleat 10 has two ends 18, 17 exhibiting this characteristic of reducing the dimensions of their cross-section.

[0068] Figure 5 shows another 3D view of the movable stop 10 of the invention. For example, the movable stop 10 has gripping portions 19 adapted for contact with a finger. These portions can be distributed on each lateral part of the movable stop 10 on either side of the axis A0 along the plane in which the width of the movable stop 10 extends. Finally, different gripping portions can be present on the same side of the movable stop, as shown in Figure 5. Piece containing two rings

[0069] Fig. 6 represents an example of an embodiment of part 4 comprising a double ring 41, 43. This figure represents a sectional view of Fig. 7 representing this part in 3D view.

[0070] According to one embodiment, the part 4 comprises two rings 41, 43 each having a central passage 42, 44.

[0071] According to a first embodiment, the two rings 41, 43 are coplanar and are made in the same plane or in two parallel planes. The part forms an "8", the rings of the 8 being separated by a central part 47.

[0072] According to a second embodiment, the two rings 41, 43 are formed in planes perpendicular to each other. The part forms a "twisted figure eight" as shown in [Fig. 7]. According to this example, the central part 47 of the part 4 is reinforced at each portion adjacent to a ring 41 or 43 so that the part 4 is sufficiently strong.

[0073] Each ring 41, 43 may have properties specific to the object to which it is attached. For example, ring 41 has an oval shape to accommodate a movable cleat 10 whose cross-section is asymmetrical in width and height. As another example, ring 43 has a circular shape to accommodate a tubular element with a circular cross-section, such as a retaining tube 22.

[0074] According to one embodiment, the rings 41, 43 form the two ends 45, 46 of the part 4. Thus, the part 4 comprises a ring 43 connected to a central part 47 which is itself connected to a ring 4L. Other designs are compatible with the invention in which the rings are not necessarily ends of the part 4.

[0075] In order to obtain a part 4 that is strong and capable of supporting the weight of a pocket 2, the ring 41 of the part 4, shown in [Fig. 6], is held to the central portion 47 by an enlarged edge extending over a portion of a circular arc of more than 15°. Such design allows for the definition of a resistant part that does not give way under the stress of the weight and movements of a pocket 2 moving underwater.

[0076] Figure 7 shows a similar design at the other end of part 4. The connection between the central portion 47 and the ring 43 extends over an arc of the ring 43 so as to mechanically reinforce this connection. The central portion 47 is widened over the arc in contact with the ring 43. When the part is molded, these connections form a single-piece joint made of the same material. The ring 43 allows the passage of the tubular retaining element 22. The ring 43 therefore preferably has a circular opening. Any other cross-section can be made, for example, a square one when the retaining bar 32 has a square cross-section.

[0077] Part 4 comprising two rings 41, 43 can advantageously be injection molded.

[0078] A polyamide-type material can provide good rigidity to part 4. It also offers good resistance to wear and abrasion, while having some flexibility.

[0079] According to another example, a polycarbonate-type material offers good impact resistance. It allows for a certain rigidity of the part with good deformation capacity under load while maintaining good mechanical strength.

[0080] Another example of a material is high-density polyethylene. This semi-rigid polymer offers good tensile strength and good impact resistance.

[0081] Another material can be chosen to make part 4, such as polypropylene. The latter is a lightweight, rigid and flexible polymer. It is fatigue resistant.

[0082] According to another example, a polyurethane-type material can be used to provide high rigidity or greater flexibility as required. It has the advantage of being wear-resistant while remaining flexible.

[0083] Finally, acrylonitrile butadiene styrene can be used. This robust, rigid, and impact-resistant polymer also offers a good compromise between rigidity and flexibility.

[0084] Another usable material is polyoxymethylene, also called acetal or Delrin; it is a very rigid thermoplastic polymer with low friction. It offers good fatigue resistance.

[0085] Another material that can be used is a thermoplastic elastomer. This latter polymer is flexible and has good mechanical resistance.

[0086] Finally, one material that can be used is polycarbonate, which has the advantage of providing good mechanical strength.

[0087] These materials can be chosen according to the desired properties to also make the movable cleat.

[0088] The fastening system of the invention allows for the reliable and robust attachment of an oyster bag to a rearing table positioned at sea or in a tank. One advantage of the invention is that it facilitates handling for an operator such as an oyster farmer who handles numerous bags to be attached to or detached from their table. The change in angle offered by the two orientations of the two rings of part 4 makes it possible, on the one hand, to limit wear on said part when the bag swings around the retaining bar 32 and, on the other hand, to facilitate the removal or attachment of the bag laterally, that is to say, by sliding the bag 2 in the direction of the retaining bar 32 or by moving the movable cleat 10 in the same direction. Thus, handling is facilitated while providing very good bag attachment.

Claims

Demands

1. System for the rearing of shelled molluscs comprising: • a bag (2) intended to contain the shelled molluscs and adapted to be fixed to a retaining bar (32) of a rearing table (3), said bag (2) being formed by a net (20) and having at least one upper opening (21) for the passage of a fastening means (1); • a tubular retaining element (22) placed in the pocket (2) to allow attachment of said pocket (2) to a retaining bar (32) of a rearing table (3), • at least one fastening system (1) allowing the tubular retaining element (22) to be fixed to the retaining bar (32) of a rearing table (3), said fastening system (1) comprising: • a part (4) comprising two rings (41, 43) each having a central passage (42, 44) for the passage of, on the one hand, the tubular retaining element (22) and, on the other hand, a movable cleat (10);• a movable cleat (10) adapted to be inserted into at least one ring (41) of the part (4) and intended to be held in contact with said ring by a link (5), said movable cleat (10) having a central area (15) adapted to form a winding guide for the passage of a link (5), • a link (5) intended to be fixed on one side to the movable cleat (10) and on the other side to the retaining bar (32) of the rearing table (3).;

2. System according to claim 1 characterized in that the two rings (41, 43) of the part (4) are arranged along two perpendicular planes.

3. System according to claim 1 characterized in that the two rings (41, 43) of the part (4) are arranged along two non-coplanar planes.

4. System according to any one of claims 1 to 3 characterized in that the part (4) is a one-piece polymer part.

5. System according to any one of the preceding claims characterized in that at least one of the rings of the part (4) is oval or elliptical in shape, preferably the ring (41) through which the link (5) passes is oval or elliptical in shape.

6. System according to any one of the preceding claims characterized in that the movable cleat (10) comprises at least one lateral guide (11, 13) facilitating the retention of a link (5) on said movable cleat (10), said link being intended to be wrapped around the central portion of the movable cleat (10).

7. System according to claim 6 characterized in that at least one lateral guide (11, 13) has a notch (12, 14) allowing the insertion or removal of the link (5) in the lateral guide of the movable cleat (10).

8. System according to any one of the preceding claims characterized in that the movable cleat (10) comprises two lateral guides (11, 13) arranged on either side of the central portion (15) of the movable cleat (10), the two guides forming a rectangular area and both being coplanar.

9. System according to any one of the preceding claims characterized in that the movable cleat (10) has two ends (17, 18), at least one of which has a thinning of its thickness favoring its insertion into a ring (41) of the part (4).

10. System according to any one of the preceding claims characterized in that the movable cleat (10) has a profile of cross-section considered transversely to its largest dimension having a width and a height, the maximum width being less than the maximum height of the profile so as to allow the movable cleat (10) to be introduced into a ring (41) of the part (4) according to a limited number of orientations of the movable cleat (10) around its axis parallel (Ao) to its largest dimension.

11. System according to any one of the preceding claims characterized in that the link (5) is a flexible elastic band forming a loop and having a rectangular section preferably having a thickness of less than 1cm.

12. System according to claim 11 characterized in that the link (5) is made of rubber.

13. System according to any one of claims 1 to 10 characterized in that the link (5) is a strap.

14. System according to any one of the preceding claims characterized in that the bag (2) comprises two lateral portions, preferably rectangular, forming the largest surfaces of said bag (2), said portions being intended to extend in a substantially vertical plane when the bag is fixed to a rearing table (3), said lateral portions being mobile around the retaining bar (32) according to a pendulum motion obtained through the flexibility of the link (5).

15. System according to any one of the preceding claims characterized in that it comprises a buoyancy reserve (25) preferably fixed on the lower part of the pocket (2).

16. System according to any one of claims 1 to 10 characterized in that it comprises two fastening systems.

17. Table for the rearing of shelled bivalve molluscs comprising uprights (31) of retaining bars (32) and at least one system according to any one of claims 1 to 16.