WO2007131600A1 - An aquaculture pen with energy absorbing connections - Google Patents

An aquaculture pen with energy absorbing connections Download PDF

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Publication number
WO2007131600A1
WO2007131600A1 PCT/EP2007/003637 EP2007003637W WO2007131600A1 WO 2007131600 A1 WO2007131600 A1 WO 2007131600A1 EP 2007003637 W EP2007003637 W EP 2007003637W WO 2007131600 A1 WO2007131600 A1 WO 2007131600A1
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WO
WIPO (PCT)
Prior art keywords
net
aquaculture pen
pen according
aquaculture
energy absorbing
Prior art date
Application number
PCT/EP2007/003637
Other languages
French (fr)
Inventor
Samuel Enrique Kunz Astete
Guillermo Alejandro Vidal Rudloff
Original Assignee
Nv Bekaert Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nv Bekaert Sa filed Critical Nv Bekaert Sa
Publication of WO2007131600A1 publication Critical patent/WO2007131600A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

Definitions

  • the present invention generally relates to aquaculture pens or fish-farming nets that are used to contain and raise freshwater and/or saltwater aquatic life like fish.
  • the aquaculture pen provides a controlled environment for raising the aquatic life and protects the aquatic life against predators, e.g. sharks.
  • the term "net” must be interpreted broadly and covers any flexible meshed structure as well as rigid meshed structures, sometimes called cages.
  • Aquaculture pens typically consist of a meshed net connected to a floating support, e.g. a raft or pontoon.
  • the meshed net is made out of a polymer such as polyethylene, polyester, polyamide, nylon, etc. or out of chain like metal wires such as stainless steel wires, galvanized steel wires or coated steel wires.
  • the dimensions and weight of an agriculture pen are considerable. Typical dimensions are in the range of 30 m width x 30 m length x 15 m depth.
  • PCT Patent Application WO 03/091584 entitled “Suspension Hook and Spiral- Shaped Net Joiner” discloses an aquaculture net, 42 in Fig. 17, that is connected to a floating support, 50 in Fig. 17, through a number of rigid hooks, 20 in Fig. 17.
  • the rigid hooks are pivotable in order to enable the meshed net to move under the influence of currents.
  • the pivotable hook is made out of steel, optionally galvanised, coated or stainless steel.
  • Fig. 1 shows an aquaculture pen whose net 50 is connected at regular distances along its circumference to a rail 56 mounted on a floating pontoon 12.
  • the connection between net and rail is realized through ties, e.g. short lengths of rope or off-the-shelve plastic rib lock ties as . -
  • Fig. 6.3 is a rather radical, complex and expensive solution.
  • An alternative for the sea station drifter is a rigid seabed bottom cage, also shown in Fig. 6.3, which is a submerged fish cage of very robust design.
  • the rigid seabed bottom cage however is an expensive solution that is not recommended when the height of waves is expected to exceed 15 metres.
  • an aquaculture pen for containing and raising aquatic life in water comprising:
  • the floating element e.g. the raft, pontoon, sidewalk, etc. is following the movements of the water surface. These movements can be very intense due to tidings, weather conditions, etc.
  • the net on the other hand, due to its size and weight, does not follow the movements of the water.
  • the use of an energy absorbing material for at least a portion of the juncture between the floating element and the net will release the net of the forces resulting from the movements of the water surface relative to the net. As a consequence, the net shall not be ruptured and no openings will be created in the net near the water surface.
  • the entire juncture can be made out of the energy absorbing material or alternatively, only a portion such as a band or strip may be made out of the energy absorbing material, whereas remaining parts of the juncture may constitute rigid portions.
  • An additional advantage of the energy absorbing material is that fewer junctures have to be provided than was the case for rigid, metallic junctures. Up to 5 times fewer junctures have to be deployed along the circumference of the net thanks to the current invention.
  • An optional feature of the aquaculture pen according to the present invention is that the energy absorbing material is water resistant, as specified by claim 2. . .
  • the materials used for such juncture are water resistant.
  • the energy absorbing material however need not be water resistant.
  • a further optional feature of the aquaculture pen according to the present invention is that the energy absorbing material is corrosion resistant, as specified by claim 3.
  • the materials used for the juncture are preferably corrosion resistant, or made corrosion resistant e.g. through coating.
  • the energy absorbing material is rubber.
  • the energy absorbing material is reinforced rubber.
  • the forces on the juncture resulting from relative movements between the floating structure and the net may be high, requiring a reinforced energy absorbing material such as reinforced rubber for the juncture or portion thereof.
  • the means for connecting that form part of the aquaculture pen according to the present invention comprise a cut rubber hose.
  • the juncture or a portion thereof may for instance be constituted by a rubber hose such as the Goodyear Type 10 rubber hose that has an internal diameter of 6" and an external diameter of 170 mm.
  • This rubber hose is reinforced with 8 cloths, each ring having a width of 20 to 25 mm.
  • the rubber hose has a rupture load capacity of 800 to 1000 kg per ring. Any alternative material that can be employed as shock or energy absorber and that has a 1000 kg tear load can be used.
  • a further option of the aquaculture pen according to the present invention is that the means for connecting comprise a juncture for each meter of circumference of the meshed net, as specified by claim 7.
  • the rigid prior art junctures such as metal hooks or ropes typically are employed every 20 or 30 cm
  • the energy absorbing junctures according to the present invention can be employed every meter, reducing the number of junctures needed for instance from 320 to 96 for a circular net with a 30 m diameter.
  • the meshed net in the aquaculture pen according to the present invention may have dimensions of at least 10 m width x 10 m length x 5 m depth.
  • the meshed net in the aquaculture pen according to the present invention may have dimensions of at least 30 m width x 30 m length x 15 m depth.
  • the meshed net in the aquaculture pen according to the present invention may have a weight of at least 1 metric ton.
  • the meshed net in the aquaculture pen according to the current invention may have a weight of at least 4 metric ton.
  • the meshed net may be made out of one or a combination of the following materials:
  • Fig. 1 illustrates a first embodiment of the aquaculture pen according to the present invention
  • Fig. 2 illustrates a second embodiment of the aquaculture pen according to the present invention.
  • Fig. 1 shows a square aquaculture pen consisting of a fish-farming net 101 connected through a number of junctures to a raft 102.
  • the fishing-farming net 101 keeps aquatic life such as fish controlled and contained, and protects the aquatic life inside the fish-farming net 101 against predators such as sharks.
  • the fish-farming net 101 drawn in Fig. 1 is supposed to have square dimensions along the water surface, i.e. 30 m width by 30 m length, and is supposed to have a depth of 15 m inside the water.
  • the fish-farming net 101 consists of a chain link fence of galvanized steel wire and has a weight above 4 metric tonnes. The junctures, only five of which are drawn in Fig.
  • each side of the square circumference of the fishfarming net 101 is connected through 30 junctures with the raft 102, the latter raft being drawn only partially in Fig. 1.
  • Each juncture consists of a rope 104 connected to the raft 102 and a reinforced rubber portion 103.
  • the rubber portion 103 is cut from a Goodyear Type 10 reinforced rubber hose that has 6" internal diameter and 170 mm external diameter. It is reinforced with 8 cloths, each ring having a width of 20 to 25 mm. Thanks to the rubber portion, stress applied on the upper part of the fishfarming net 101 , i.e. the first metres of the net below the water surface, is avoided.
  • the rubber joint 103 absorbs the shocks that result from relative movement between the raft 102 following the water surface movements and the fish-farming net 101 that . _
  • the rubber joint 103 helps the squares or chains in the mesh 101 around the rubber joint 103 to withstand the weight of the fish-farming net 101.
  • Fig. 2 shows a circular aquaculture pen wherein a fish-farming net 201 is connected to a circular pontoon 202 through a number of junctures 203, only a few of which are shown in Fig. 2.
  • the circular net 201 is supposed to have a diameter of 30 m, hence a perimeter of 96 meter.
  • the junctures 23 are deployed every meter, thus requiring 96 junctures.
  • the entire juncture 23 is made out of reinforced rubber and consists of a cut Goodyear Type 10 hose with 4" internal diameter and 116 mm external diameter. It is reinforced with 6 clothes, each ring having a rupture load of 750 kg. Again, the junctures in Fig.
  • the rubber juncture 203 not only absorbs energy resulting from the relative movements between net and pontoon, but also can withstand seawater conditions, and it is corrosion resistant.
  • the reinforced rubber hose may be employed in combination with ropes or other materials in order to constitute junctures for connecting fish-farming nets to circular pontoons or rafts.
  • any alternative energy absorbing material could serve to implement the current invention.
  • materials from the elastomer family like natural rubber, polybutadiene, neoprene, silicone, viton, polyurethane rubber, and others could be used for the junction or portion of the junction between the net and the floating element whereto the net is attached.
  • the rubber hose which constitutes the juncture or part of the juncture drawn in Fig. 1 and Fig. 2 is closed through employment of nuts and bolts.
  • a closed ring rubber juncture can be used to constitute the juncture or a portion of the juncture according to the current invention, thus avoiding the use of nuts and bolts.
  • Another remark is that the dimensions and weight of the net, the distances between two neighbouring junctures are only given by example. It will be appreciated by the person skilled in the art that the advantages related to the current invention are also achieved or partially achieved when the net has different dimensions, when the junctures are not deployed equidistantly along the circumference or not every meter.
  • the aquaculture net that was supposed to be made out of galvanized steel wire in the above embodiments, alternatively can be made out of steel wire with a corrosion resistant coating or with an antifouling coating.
  • the net can also be made of a polymer such as polyethylene, polyester or polyamide. The heavier the material used for the net, the more advantageous the current invention will be.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Farming Of Fish And Shellfish (AREA)

Abstract

An aquaculture pen for containing and raising aquatic life in water comprises a meshed net (101) and means (103, 104) for connecting the meshed net (101) near the water surface to a floating element (102), e.g. a raft or pontoon. The means (103, 104) for connecting at least partially consist of an energy absorbing material, like for instance reinforced rubber.

Description

AN AQUACULTURE PEN WITH ENERGY ABSORBING CONNECTIONS
Field of the Invention
The present invention generally relates to aquaculture pens or fish-farming nets that are used to contain and raise freshwater and/or saltwater aquatic life like fish. The aquaculture pen provides a controlled environment for raising the aquatic life and protects the aquatic life against predators, e.g. sharks. In the context of this patent application, the term "net" must be interpreted broadly and covers any flexible meshed structure as well as rigid meshed structures, sometimes called cages.
Background of the Invention
Aquaculture pens typically consist of a meshed net connected to a floating support, e.g. a raft or pontoon. The meshed net is made out of a polymer such as polyethylene, polyester, polyamide, nylon, etc. or out of chain like metal wires such as stainless steel wires, galvanized steel wires or coated steel wires. The dimensions and weight of an agriculture pen are considerable. Typical dimensions are in the range of 30 m width x 30 m length x 15 m depth.
PCT Patent Application WO 03/091584 entitled "Suspension Hook and Spiral- Shaped Net Joiner" discloses an aquaculture net, 42 in Fig. 17, that is connected to a floating support, 50 in Fig. 17, through a number of rigid hooks, 20 in Fig. 17. The rigid hooks are pivotable in order to enable the meshed net to move under the influence of currents. As is mentioned on page 3, lines 29-31 of this patent application, the pivotable hook is made out of steel, optionally galvanised, coated or stainless steel.
In PCT Patent Application WO 98/32330 entitled "Demountable Floating Structure and an Aquaculture Pen Incorporating Same", Fig. 1 shows an aquaculture pen whose net 50 is connected at regular distances along its circumference to a rail 56 mounted on a floating pontoon 12. The connection between net and rail is realized through ties, e.g. short lengths of rope or off-the-shelve plastic rib lock ties as . -
described on page 12, lines 23-26, or alternatively by rigid hooks, shown in Fig. 5 and Fig. 6, and described in the paragraph on page 13, lines 9-22 of WO 98/32330.
In another prior art document, Japanese Patent Application JP6284837 entitled "Fish Preserver for Pisciculture", a fish preserving net is connected to a cultivation raft through ropes, 8 in Fig. 1 and Fig. 4, and rigid rope fixing tools, 9 in Fig. 1 , Fig. 3 and Fig. 4.
All prior art aquaculture pens suffer from ruptures being created in the net resulting in large openings near the water surface. In particular in case of heavy steel nets, the ruptures may destroy the net, hence enabling the aquatic life to leave the controlled environment and/or predators to enter the
The thesis "Design Considerations and Loads on Open Ocean Fish Cages South of Iceland" from Geir Agύstsson, published by the Faculty of Engineering at the University of Iceland in June 2004 recognizes the problem of loads on open fish cages due to current-, wave- and climate conditions. Although it does not explicitly refer to the creation of ruptures near the water surface, this thesis mentions on page 10, first paragraph, that a fish cage will respond in a complex way to external loads from waves and currents creating large forces on various components or parts. Improvements that are suggested in paragraph 6.3 of this thesis entail the use of ocean drifters designed to reduce the effects of moving water by enabling the cage to drift with the ocean current. Such sea station ocean drifter, depicted in Fig. 6.3, is a rather radical, complex and expensive solution. An alternative for the sea station drifter is a rigid seabed bottom cage, also shown in Fig. 6.3, which is a submerged fish cage of very robust design. The rigid seabed bottom cage however is an expensive solution that is not recommended when the height of waves is expected to exceed 15 metres.
It is an object of the present invention to provide an aquaculture pen which overcomes the above described shortcomings of the prior art. In particular, it is an object to disclose an aquaculture pen which is not plagued by rupture formation near the water surface, i.e. where the net is connected to a floating structure. Further, it is . .
an object to reduce the number of connections needed between the net and the floating structure.
Summary of the Invention
According to the present invention, the above described objects are realized and the shortcomings of the prior art solutions are overcome through an aquaculture pen for containing and raising aquatic life in water, the aquaculture pen comprising:
- a meshed net; and - means for connecting the meshed net near the water surface to a floating element, the means for connecting at least partially consisting of an energy absorbing material, as defined by claim 1.
The floating element, e.g. the raft, pontoon, sidewalk, etc. is following the movements of the water surface. These movements can be very intense due to tidings, weather conditions, etc. The net on the other hand, due to its size and weight, does not follow the movements of the water. As opposed to the ropes, ties or hooks of the different prior art solutions which all constitute rigid connections between the floating structure and the aquaculture net, the use of an energy absorbing material for at least a portion of the juncture between the floating element and the net, will release the net of the forces resulting from the movements of the water surface relative to the net. As a consequence, the net shall not be ruptured and no openings will be created in the net near the water surface. The entire juncture can be made out of the energy absorbing material or alternatively, only a portion such as a band or strip may be made out of the energy absorbing material, whereas remaining parts of the juncture may constitute rigid portions.
An additional advantage of the energy absorbing material is that fewer junctures have to be provided than was the case for rigid, metallic junctures. Up to 5 times fewer junctures have to be deployed along the circumference of the net thanks to the current invention.
An optional feature of the aquaculture pen according to the present invention is that the energy absorbing material is water resistant, as specified by claim 2. . .
Since the juncture between the floating structure and net is in contact with the water surface, it is advantageous that the materials used for such juncture are water resistant. In embodiments where only a portion of the juncture is made out of energy absorbing material, and where such portion is positioned above the water surface, near the floating element, the energy absorbing material however need not be water resistant.
A further optional feature of the aquaculture pen according to the present invention is that the energy absorbing material is corrosion resistant, as specified by claim 3.
Again, as the juncture will be in contact with an aggressive environment, in particular in the case of salt water, the materials used for the juncture are preferably corrosion resistant, or made corrosion resistant e.g. through coating.
In an instance of the aquaculture pen according to the current invention defined by claim 4, the energy absorbing material is rubber.
Indeed, as rubber is energy absorbing, and able to withstand seawater conditions, including corrosion, it is very suitable as material for the juncture or part of the juncture in the aquaculture pen according to the current invention.
In another instance of the aquaculture pen according to the current invention defined by claim 5, the energy absorbing material is reinforced rubber.
In particular for heavy, steel nets, the forces on the juncture resulting from relative movements between the floating structure and the net, may be high, requiring a reinforced energy absorbing material such as reinforced rubber for the juncture or portion thereof.
Optionally, as specified by claim 6, the means for connecting that form part of the aquaculture pen according to the present invention comprise a cut rubber hose. .
Indeed, the juncture or a portion thereof may for instance be constituted by a rubber hose such as the Goodyear Type 10 rubber hose that has an internal diameter of 6" and an external diameter of 170 mm. This rubber hose is reinforced with 8 cloths, each ring having a width of 20 to 25 mm. The rubber hose has a rupture load capacity of 800 to 1000 kg per ring. Any alternative material that can be employed as shock or energy absorber and that has a 1000 kg tear load can be used.
A further option of the aquaculture pen according to the present invention is that the means for connecting comprise a juncture for each meter of circumference of the meshed net, as specified by claim 7.
Whereas, the rigid prior art junctures such as metal hooks or ropes typically are employed every 20 or 30 cm, the energy absorbing junctures according to the present invention can be employed every meter, reducing the number of junctures needed for instance from 320 to 96 for a circular net with a 30 m diameter.
As specified by claim 8, the meshed net in the aquaculture pen according to the present invention may have dimensions of at least 10 m width x 10 m length x 5 m depth.
As specified by claim 9, the meshed net in the aquaculture pen according to the present invention may have dimensions of at least 30 m width x 30 m length x 15 m depth.
As specified by claim 10, the meshed net in the aquaculture pen according to the present invention may have a weight of at least 1 metric ton.
As specified by claim 11 , the meshed net in the aquaculture pen according to the current invention may have a weight of at least 4 metric ton.
Further, and again optionally to the aquaculture pen according to the present invention, the meshed net may be made out of one or a combination of the following materials:
- a polymer; _ .
- galvanized steel wire;
- coated steel wire;
- stainless steel wire.
The latter optional feature of the current invention is defined by claim 12.
Brief Description of the Drawings
Fig. 1 illustrates a first embodiment of the aquaculture pen according to the present invention; and
Fig. 2 illustrates a second embodiment of the aquaculture pen according to the present invention.
Detailed Description of Embodiment(s)
Fig. 1 shows a square aquaculture pen consisting of a fish-farming net 101 connected through a number of junctures to a raft 102. The fishing-farming net 101 keeps aquatic life such as fish controlled and contained, and protects the aquatic life inside the fish-farming net 101 against predators such as sharks. The fish-farming net 101 drawn in Fig. 1 is supposed to have square dimensions along the water surface, i.e. 30 m width by 30 m length, and is supposed to have a depth of 15 m inside the water. The fish-farming net 101 consists of a chain link fence of galvanized steel wire and has a weight above 4 metric tonnes. The junctures, only five of which are drawn in Fig. 1 , are deployed equidistantly every meter along the circumference of the fish-farming net 101. Thus, each side of the square circumference of the fishfarming net 101 is connected through 30 junctures with the raft 102, the latter raft being drawn only partially in Fig. 1. Each juncture consists of a rope 104 connected to the raft 102 and a reinforced rubber portion 103. The rubber portion 103 is cut from a Goodyear Type 10 reinforced rubber hose that has 6" internal diameter and 170 mm external diameter. It is reinforced with 8 cloths, each ring having a width of 20 to 25 mm. Thanks to the rubber portion, stress applied on the upper part of the fishfarming net 101 , i.e. the first metres of the net below the water surface, is avoided. The rubber joint 103 absorbs the shocks that result from relative movement between the raft 102 following the water surface movements and the fish-farming net 101 that . _
does not follow the water surface movements. This way, the rubber joint 103 helps the squares or chains in the mesh 101 around the rubber joint 103 to withstand the weight of the fish-farming net 101.
Fig. 2 shows a circular aquaculture pen wherein a fish-farming net 201 is connected to a circular pontoon 202 through a number of junctures 203, only a few of which are shown in Fig. 2. The circular net 201 is supposed to have a diameter of 30 m, hence a perimeter of 96 meter. The junctures 23 are deployed every meter, thus requiring 96 junctures. The entire juncture 23 is made out of reinforced rubber and consists of a cut Goodyear Type 10 hose with 4" internal diameter and 116 mm external diameter. It is reinforced with 6 clothes, each ring having a rupture load of 750 kg. Again, the junctures in Fig. 2 avoid the creation of ruptures in the net 201 near the water surface as a result of relative motion between the net 201 and the floating pontoon 202 that follows the water surface movements and induces forces on the net 201 in particular when the movements re heavy as a result of tidings or weather conditions. The rubber juncture 203 not only absorbs energy resulting from the relative movements between net and pontoon, but also can withstand seawater conditions, and it is corrosion resistant. Obviously, as opposed to what is drawn in Fig. 2, the reinforced rubber hose may be employed in combination with ropes or other materials in order to constitute junctures for connecting fish-farming nets to circular pontoons or rafts.
Although the above described embodiments deploy reinforced rubber junctures, it is noticed any alternative energy absorbing material could serve to implement the current invention. Hence, materials from the elastomer family like natural rubber, polybutadiene, neoprene, silicone, viton, polyurethane rubber, and others could be used for the junction or portion of the junction between the net and the floating element whereto the net is attached.
It is also remarked that the rubber hose which constitutes the juncture or part of the juncture drawn in Fig. 1 and Fig. 2 is closed through employment of nuts and bolts. As an alternative a closed ring rubber juncture can be used to constitute the juncture or a portion of the juncture according to the current invention, thus avoiding the use of nuts and bolts. Another remark is that the dimensions and weight of the net, the distances between two neighbouring junctures are only given by example. It will be appreciated by the person skilled in the art that the advantages related to the current invention are also achieved or partially achieved when the net has different dimensions, when the junctures are not deployed equidistantly along the circumference or not every meter.
Yet another remark is that the aquaculture net , that was supposed to be made out of galvanized steel wire in the above embodiments, alternatively can be made out of steel wire with a corrosion resistant coating or with an antifouling coating. The net can also be made of a polymer such as polyethylene, polyester or polyamide. The heavier the material used for the net, the more advantageous the current invention will be.
Although the present invention has been illustrated by reference to specific embodiments, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied with various changes and modifications without departing from the spirit and scope thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. In other words, it is contemplated to cover any and all modifications, variations or equivalents that fall within the spirit and scope of the basic underlying principles and whose essential attributes are claimed in this patent application. It will furthermore be understood by the reader of this patent application that the words "comprising" or "comprise" do not exclude other elements or steps, that the words "a" or "an" do not exclude a plurality.

Claims

. .CLAIMS
1. An aquaculture pen for containing and raising aquatic life in water, said aquaculture pen comprising: a meshed net (101 ; 201 ); means (103, 104; 203) for connecting said meshed net (101 ; 201) near the water surface to a floating element (102; 202);
CHARACTERIZED IN THAT said means (103, 104; 203) for connecting said meshed net (101; 201) at least partially consist of an energy absorbing material.
2. An aquaculture pen according to claim 1 ,
CHARACTERIZED IN THAT said energy absorbing material is water resistant.
3. An aquaculture pen according to claim 1 , CHARACTERIZED IN THAT said energy absorbing material is corrosion resistant.
4. An aquaculture pen according to claim 1 , CHARACTERIZED IN THAT said energy absorbing material is rubber.
5. An aquaculture pen according to claim 1 ,
CHARACTERIZED IN THAT said energy absorbing material is reinforced rubber.
6. An aquaculture pen according to claim 1 ,
CHARACTERIZED IN THAT said means (103, 104; 203) for connecting comprise a cut rubber hose.
7. An aquaculture pen according to claim 1 , CHARACTERIZED IN THAT said means (103, 104; 203) for connecting comprise a juncture for each meter of circumference of said meshed net (101 ; 201).
8. An aquaculture pen according to claim 1 , _
CHARACTERIZED IN THAT said meshed net (101 ; 201) has dimensions of at least 10 m x 10 m x 5 m.
9. An aquaculture pen according to claim 1 , CHARACTERIZED IN THAT said meshed net (101 ; 201) has dimensions of at least 30 m x 30 m x 15 m.
10. An aquaculture pen according to claim 1 ,
CHARACTERIZED IN THAT said meshed net (101; 201) has a weight of at least 1 metric ton.
11. An aquaculture pen according to claim 1 ,
CHARACTERIZED IN THAT said meshed net (101 ; 201) has a weight of at least 4 metric ton.
12. An aquaculture pen according to claim 1 ,
CHARACTERIZED IN THAT said meshed net (101 ; 201) is made out of one or a combination of the following materials:
- a polymer; - galvanized steel wire;
- coated steel wire;
- stainless steel wire.
PCT/EP2007/003637 2006-05-11 2007-04-25 An aquaculture pen with energy absorbing connections WO2007131600A1 (en)

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EP06009731.8 2006-05-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2326164B1 (en) * 2008-08-27 2019-02-13 Ecosea Farming S.p.A. Aquaculture cage
CN112450144A (en) * 2020-11-18 2021-03-09 潍坊新力蒙水产技术有限公司 Fence type running water aquaculture circulating system

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GB2091071A (en) * 1981-01-16 1982-07-28 Borsea Ltd Improvements relating to fish pens
GB2163331A (en) * 1984-08-25 1986-02-26 Jim Jensen Fish farm for raising fish in the open sea
EP0480114A1 (en) * 1990-08-21 1992-04-15 Pisciculture Marine De Monaco S.A.M Device for breeding fish in the open sea
EP0548912A1 (en) * 1991-12-27 1993-06-30 Sumitomo Rubber Industries Limited Material for making marine structure
EP1186231A2 (en) * 2000-09-11 2002-03-13 Fishfarm Tech Ltd. Fish farming system and method
WO2004017725A1 (en) * 2002-08-26 2004-03-04 Stroemmen Kurt Andre Net cage installation for fish farming
WO2004055272A2 (en) * 2002-12-17 2004-07-01 Enertec Ag Floating foundation for wind energy production and methods for constructing and using asaid floating foundations
FR2883700A1 (en) * 2005-03-31 2006-10-06 Yad Marine Sarl Cage hooking device for shellfish farming e.g. oyster culture, has flexible connections with hooking units including two hook forming units arranged in two respective planes, where planes are parallel and distinct from each other

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2326164B1 (en) * 2008-08-27 2019-02-13 Ecosea Farming S.p.A. Aquaculture cage
CN112450144A (en) * 2020-11-18 2021-03-09 潍坊新力蒙水产技术有限公司 Fence type running water aquaculture circulating system

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