CA1337894C - Offshore fish farm - Google Patents
Offshore fish farmInfo
- Publication number
- CA1337894C CA1337894C CA000603843A CA603843A CA1337894C CA 1337894 C CA1337894 C CA 1337894C CA 000603843 A CA000603843 A CA 000603843A CA 603843 A CA603843 A CA 603843A CA 1337894 C CA1337894 C CA 1337894C
- Authority
- CA
- Canada
- Prior art keywords
- silo
- fish
- windows
- silos
- base frame
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 241000251468 Actinopterygii Species 0.000 title claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 238000005273 aeration Methods 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
- 241001465754 Metazoa Species 0.000 claims description 6
- 239000013505 freshwater Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 238000009395 breeding Methods 0.000 claims description 5
- 230000001488 breeding effect Effects 0.000 claims description 5
- 238000006213 oxygenation reaction Methods 0.000 claims description 5
- 230000000384 rearing effect Effects 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 239000011152 fibreglass Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 244000062645 predators Species 0.000 claims description 2
- 239000002990 reinforced plastic Substances 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 2
- 238000003780 insertion Methods 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- -1 Polyethylene Polymers 0.000 description 2
- 239000005422 algal bloom Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 101100345589 Mus musculus Mical1 gene Proteins 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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
Landscapes
- 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)
- Catching Or Destruction (AREA)
- Artificial Fish Reefs (AREA)
Abstract
An offshore fish farm with a semi-submerged floating platform for supporting fish silos which are inserted therein and immersed in the water to a predetermined depth. The fish silos have windows with protective grills and a disposal system for impurities. The contained fish are thus protected from harmful environmental influences and pollution and from mechanical stress, greatly reducing the risk of production loss.
Description
The invention relates to an offshore fish farm for holding, rearing and breeding fish or similar aquatic animals, which includes a semi-submerged floating platform, a base frame, buoyancy columns interconnecting the base frame and the floating platform and provides one or more restricted living spaces for the fish.
There are different production systems used to rear and breed fish.
There is the traditional pond fishery with stAn~;ng or flowing water.
St~n~ing water fisheries require water treatment. In most cases, oxygen must be supplied through aeration. More recent production systems use fish basins and net enclosures. The water renewal in fish basins also requires a cross flow of water or water treatment. Aeration and oxygen supply are further necessities. ~ith net enclosures, the water renewal results from the surrounding water body while aeration is not absolutely necessary. However, net enclosures pose other problems because they are not sufficient to screen off either physical environmental influences or environmental pollution such as oil spills, algal bloom or similar occurrences. Physical influences, for instance driftwood, drift ice and particularly att~rking predatory fish can cause widespread damage and ultimately lead to the destruction of the net enclosures and loss of the complete fish production. This is especially true where the fish production is in an offshore fish farm, because the site conditions are particularly demanding. Furthermore, net enclosures provide insufficient protection against theft and sabotage.
It is an object of the invention to make possible an offshore fish farm for reliable rearing and breeding of fish, while providing protection against harmful physical influences and environmental pollution.
Here described is an offshore fish farm in which the fish silos, providing the living space for fish to be reared are inserted into a floating platform, the fish silos having closable windows with grids, grills or bars of chosen strength and mesh size, and a disposal system for impurities. Such impurities comprise fish excrement, food LeL ~ins or other pollutants. The fish silos immersed in the water and having such windows (hereinafter barred windows) give good mechanical protection against harmful mechanical environmental influences such as driftwood and drift ice, but also against ~
-att~cking predatory fish, theft and sabotage. The lattice forming the grids or grills of the barred windows is strong enough and the distance between the individual elements of the lattice is small enough to achieve these effects.
Furthermore, protection against environmental pollution such as oil spills, algal bloom or similar occurrences is obtained by closing the windows when needed. Vhile the open windows allow continl~o~ls water flow, when the windows are closed fresh ~ater support, and if necessary aeration and oxygenation, can be brought up from deeper waters. Another possibility for protection is in being able to tow the offshore fish farm to a pollution free area and subsequent anchoring there. Timely removal of wastes is realized by employing the disposal system and preventing self-contamination, for example, ~ i~
production from such impurities. Indeed, with the offshore fish farm embodying the invention, fish production can be intensified using the natural conditions of the site without interruption of the freshwater supply, and deterioration of water quality which can lead to production losses. The combined security measures and against harmful environmental influences against internal and external merh~nicAl stress provided by the new apparatus result in a fish farm with the utmost natural and secure fish cont~i- t.
The floating platform and the base frame can have framed openings for suspending the fish silos. Stable positioning of the fish silos can thus be obtained. The silos can be positioned into the openings for their suspension without difficulty using a lifting device. Vertical guides on the peripheries of the fish silos, facilitate their mounting and removal, and matching guides around the inside of the suspension openings provide for adjustable vertical displacement of the silos within the floating platform and base frame. The vertical displAc~ t can be limited and the fish silos fastened by locking means.
The depth of immersion can be controlled by height adjustment of the fish silos and by respectively flooding or pumping out buoyancy columns which are equipped with bilge pumps. Furthermore, several silos can be inserted into the suspension openings of the floating platform and base frame if the openings are divided appropriately by crossbars. A particular advantage of the arr~nge --t here described is that the fish silos can be assembled from standardized components in the form of cylindrical sections arranged on one above the other or in form of ring sections connected together at their PAT 13569-l
There are different production systems used to rear and breed fish.
There is the traditional pond fishery with stAn~;ng or flowing water.
St~n~ing water fisheries require water treatment. In most cases, oxygen must be supplied through aeration. More recent production systems use fish basins and net enclosures. The water renewal in fish basins also requires a cross flow of water or water treatment. Aeration and oxygen supply are further necessities. ~ith net enclosures, the water renewal results from the surrounding water body while aeration is not absolutely necessary. However, net enclosures pose other problems because they are not sufficient to screen off either physical environmental influences or environmental pollution such as oil spills, algal bloom or similar occurrences. Physical influences, for instance driftwood, drift ice and particularly att~rking predatory fish can cause widespread damage and ultimately lead to the destruction of the net enclosures and loss of the complete fish production. This is especially true where the fish production is in an offshore fish farm, because the site conditions are particularly demanding. Furthermore, net enclosures provide insufficient protection against theft and sabotage.
It is an object of the invention to make possible an offshore fish farm for reliable rearing and breeding of fish, while providing protection against harmful physical influences and environmental pollution.
Here described is an offshore fish farm in which the fish silos, providing the living space for fish to be reared are inserted into a floating platform, the fish silos having closable windows with grids, grills or bars of chosen strength and mesh size, and a disposal system for impurities. Such impurities comprise fish excrement, food LeL ~ins or other pollutants. The fish silos immersed in the water and having such windows (hereinafter barred windows) give good mechanical protection against harmful mechanical environmental influences such as driftwood and drift ice, but also against ~
-att~cking predatory fish, theft and sabotage. The lattice forming the grids or grills of the barred windows is strong enough and the distance between the individual elements of the lattice is small enough to achieve these effects.
Furthermore, protection against environmental pollution such as oil spills, algal bloom or similar occurrences is obtained by closing the windows when needed. Vhile the open windows allow continl~o~ls water flow, when the windows are closed fresh ~ater support, and if necessary aeration and oxygenation, can be brought up from deeper waters. Another possibility for protection is in being able to tow the offshore fish farm to a pollution free area and subsequent anchoring there. Timely removal of wastes is realized by employing the disposal system and preventing self-contamination, for example, ~ i~
production from such impurities. Indeed, with the offshore fish farm embodying the invention, fish production can be intensified using the natural conditions of the site without interruption of the freshwater supply, and deterioration of water quality which can lead to production losses. The combined security measures and against harmful environmental influences against internal and external merh~nicAl stress provided by the new apparatus result in a fish farm with the utmost natural and secure fish cont~i- t.
The floating platform and the base frame can have framed openings for suspending the fish silos. Stable positioning of the fish silos can thus be obtained. The silos can be positioned into the openings for their suspension without difficulty using a lifting device. Vertical guides on the peripheries of the fish silos, facilitate their mounting and removal, and matching guides around the inside of the suspension openings provide for adjustable vertical displacement of the silos within the floating platform and base frame. The vertical displAc~ t can be limited and the fish silos fastened by locking means.
The depth of immersion can be controlled by height adjustment of the fish silos and by respectively flooding or pumping out buoyancy columns which are equipped with bilge pumps. Furthermore, several silos can be inserted into the suspension openings of the floating platform and base frame if the openings are divided appropriately by crossbars. A particular advantage of the arr~nge --t here described is that the fish silos can be assembled from standardized components in the form of cylindrical sections arranged on one above the other or in form of ring sections connected together at their PAT 13569-l
-2-vertical edges. A further advantage is that every component may have one or more closable barred windows. The use of standardized components makes it possible to employ fish silos of variable sizes and shapes which may be of either round or polygonal cross-section. The fish silos themselves preferably consist of corrosion resistant steel, reinforced concrete or plastic, for example laminated fibreglass. The plastic can be translucent, clear or opaque depending on the species to be reared. Suitable resins for the laminated fibreglass are preferably polyester, epoxy or polyvinyl resins. Polyethylene, polypropylene and polyvinylidine fluoride are thermoplastics, which can be used in place of fibreglas.
Such silo materials are more tolerant to ultraviolet radiation than the materials for net or plastic film enclosures. The greater thickness of the fish silo material augments this property by the greater absorption of the sun's rays. The geometrically determined solidity of the construction combined with the outst~n~ing resistance of the siio construction against erosion and corrosion (UV) facilitates calculation of maintenance costs and the amortization period. The fish silos may have a funnel-like bottom with a pump at the deepest point and a closable effluent duct for disposal of the fish excrement, food residues and other impurities. The fish silos are appropriately equipped with fresh water supply pipes and lines for aeration and oxygenation which, for example in emergency situations, are inserted into the fish silos when the barred windows must be shut to prevent ingress of environmental pollution and which disrupts the normal water flow. The fresh water pipes and the aeration and oxygenation lines are connected to appropriate supply pumps.
Manual or motor-driven sliding or lifting doors are used to close the barred windows. The lattice of the barred windows comprises high density plastic or corrosion resistant steel and therefore can resist the anticipated mechanical demands or expected damage.
:~''''' More particularly in accordance with the invention there is provided, offshore fish farm apparatus for rearing and breeding fish or similar aquatic ~n;m~l~ comprising:
a semi-submersible floating platform, a base frame, and floodable buoyancy columns connecting the floating platform to the base frame with at least one restricted living enclosure for the ~nim~
said enclosures comprising at least one silo fitted into said floating platform,closable windows in said silo having bars or grid lattice therein having stability against mechanical stresses and closeness of mesh for providing water through-flow, while protecting and inhibiting passage of said animals and passage of e~t~rn~l predators, --1 o and a disposal system for impurities collecting in said silo.
Preferred embodiments of the invention will now be described by theway of example only and with reference to the accompanying drawings wherein;
FIG. 1 is an offshore fish farm embodying the invention in perspective view;
FIG. 2 is a front view of the embodiment of Figure 1 partly in vertical section;
B
FIG. 3 is a schematic plan view of the floating platform of the embodiment of Figure 1 without superstructure;
FIG. 4 is a section on the line I-I of FIG. 3;
FIG. 5 is a modified realization of the embodiment of FIG. 3;
FIG. 6 is a partial vertical section through the bottom of a fish silo;
FIG. 7 is a schematic front view of a fish silo comprising a plurality of elements;
FIG. 8 is a partial vertical section through a barred window for the embodiment of FIG. l;
FIG. 9 is a partial horizontal section through the vertical guide of a fish silo;
FIG. 10 is a partial vertical section in the connection region between two silo elements; and FIG. 11 is a schematic view of a fish silo with cylindrically formed barred windows.
The figures illustrate an offshore fish farm for the holding, rearing and breeding of fish or similar aquatic animals. The construction consists in principle of a semi-submerged floating platform 1, a base frame 2, floodable columns 3 which interconnect the platform and the base frame, bilge pumps (not shown) and one or more restricted living spaces for the fish. Fish silos 4 which form the living spaces are inserted into the floating platform. The silos 4 each have closable barred ~indo~s 5 with lattices of grills or grids 6 of sufficient strength and appropriate element spacing, and a disposal system 7,8 for impurities. The floating platform 1 and the base frame 2 have framed openings 9 for suspension of fish silos 4 into which they can be inserted by means of lifting devices. Vertical slides 10 around the periphery of the fish silos and cooperating slides on the inside of the suspension openings 9 provide for adjustable vertical displacement of the fish silos 4 in the openings of the floating platform 1 and base frame 2 with the capability of locking the fish silos 4 at predetermined heights. One of the required locking devices 11, see Figure 9, is shown schematically only. It is possible to insert several fish silos 4 into the suspension openings 9 of the floating platform 1 and base frame 2 after the openings have been appropriately partitioned by crossbars 12. Furthermore, the fish silos 4 may be assembled 1 3378~4 from standardized elements 13 as building blocks assembled side by side or stacked on one another which may be connected by outer flanges 14 interlocked by clamp rings 15. Each silo element 13 may have one or more closable barred window 5 to guarantee water through-flow. The fish silos 4 may be of circular or polygonal cross-section and may preferably be of laminated fibreglass.
Further, the fish silos 4 each have a funnel-shaped bottom 16 and a pump 7 at the lowest point equipped with a closable discharge pipe 8 for disposal of impurities. Freshwater pipes 17 and, optionally, oxygenation and aeration lines may be inserted into the fish silos 4 to provide freshwater and oxygen supply. The barred windows may be closed by motor driven sliders 18 or lifting doors. The lattice of the windows may consist of high strength plastic or corrosion resistant steel. To reduce the overall weight, the base frame Z is fabricated of reinforced concrete with a filling of foamed plastic 19, for example polystyrene.
The barred windows 5 in principle may be positioned at various levels of the fish silos 4 and distributed in any chosen pattern. In one advantageous embodiment the windows 5 are positioned at predetermined height intervals spaced uniformly at each level and secured by surrounding window lattice 6. For cylindrical silos, for example, the windows are distributed in a circle at predetermined heights around the periphery of the fish silo with protecting cylindrical formed lattice 6. Such measures assure optimal water through-flow and velocity in the silos 4.
Such silo materials are more tolerant to ultraviolet radiation than the materials for net or plastic film enclosures. The greater thickness of the fish silo material augments this property by the greater absorption of the sun's rays. The geometrically determined solidity of the construction combined with the outst~n~ing resistance of the siio construction against erosion and corrosion (UV) facilitates calculation of maintenance costs and the amortization period. The fish silos may have a funnel-like bottom with a pump at the deepest point and a closable effluent duct for disposal of the fish excrement, food residues and other impurities. The fish silos are appropriately equipped with fresh water supply pipes and lines for aeration and oxygenation which, for example in emergency situations, are inserted into the fish silos when the barred windows must be shut to prevent ingress of environmental pollution and which disrupts the normal water flow. The fresh water pipes and the aeration and oxygenation lines are connected to appropriate supply pumps.
Manual or motor-driven sliding or lifting doors are used to close the barred windows. The lattice of the barred windows comprises high density plastic or corrosion resistant steel and therefore can resist the anticipated mechanical demands or expected damage.
:~''''' More particularly in accordance with the invention there is provided, offshore fish farm apparatus for rearing and breeding fish or similar aquatic ~n;m~l~ comprising:
a semi-submersible floating platform, a base frame, and floodable buoyancy columns connecting the floating platform to the base frame with at least one restricted living enclosure for the ~nim~
said enclosures comprising at least one silo fitted into said floating platform,closable windows in said silo having bars or grid lattice therein having stability against mechanical stresses and closeness of mesh for providing water through-flow, while protecting and inhibiting passage of said animals and passage of e~t~rn~l predators, --1 o and a disposal system for impurities collecting in said silo.
Preferred embodiments of the invention will now be described by theway of example only and with reference to the accompanying drawings wherein;
FIG. 1 is an offshore fish farm embodying the invention in perspective view;
FIG. 2 is a front view of the embodiment of Figure 1 partly in vertical section;
B
FIG. 3 is a schematic plan view of the floating platform of the embodiment of Figure 1 without superstructure;
FIG. 4 is a section on the line I-I of FIG. 3;
FIG. 5 is a modified realization of the embodiment of FIG. 3;
FIG. 6 is a partial vertical section through the bottom of a fish silo;
FIG. 7 is a schematic front view of a fish silo comprising a plurality of elements;
FIG. 8 is a partial vertical section through a barred window for the embodiment of FIG. l;
FIG. 9 is a partial horizontal section through the vertical guide of a fish silo;
FIG. 10 is a partial vertical section in the connection region between two silo elements; and FIG. 11 is a schematic view of a fish silo with cylindrically formed barred windows.
The figures illustrate an offshore fish farm for the holding, rearing and breeding of fish or similar aquatic animals. The construction consists in principle of a semi-submerged floating platform 1, a base frame 2, floodable columns 3 which interconnect the platform and the base frame, bilge pumps (not shown) and one or more restricted living spaces for the fish. Fish silos 4 which form the living spaces are inserted into the floating platform. The silos 4 each have closable barred ~indo~s 5 with lattices of grills or grids 6 of sufficient strength and appropriate element spacing, and a disposal system 7,8 for impurities. The floating platform 1 and the base frame 2 have framed openings 9 for suspension of fish silos 4 into which they can be inserted by means of lifting devices. Vertical slides 10 around the periphery of the fish silos and cooperating slides on the inside of the suspension openings 9 provide for adjustable vertical displacement of the fish silos 4 in the openings of the floating platform 1 and base frame 2 with the capability of locking the fish silos 4 at predetermined heights. One of the required locking devices 11, see Figure 9, is shown schematically only. It is possible to insert several fish silos 4 into the suspension openings 9 of the floating platform 1 and base frame 2 after the openings have been appropriately partitioned by crossbars 12. Furthermore, the fish silos 4 may be assembled 1 3378~4 from standardized elements 13 as building blocks assembled side by side or stacked on one another which may be connected by outer flanges 14 interlocked by clamp rings 15. Each silo element 13 may have one or more closable barred window 5 to guarantee water through-flow. The fish silos 4 may be of circular or polygonal cross-section and may preferably be of laminated fibreglass.
Further, the fish silos 4 each have a funnel-shaped bottom 16 and a pump 7 at the lowest point equipped with a closable discharge pipe 8 for disposal of impurities. Freshwater pipes 17 and, optionally, oxygenation and aeration lines may be inserted into the fish silos 4 to provide freshwater and oxygen supply. The barred windows may be closed by motor driven sliders 18 or lifting doors. The lattice of the windows may consist of high strength plastic or corrosion resistant steel. To reduce the overall weight, the base frame Z is fabricated of reinforced concrete with a filling of foamed plastic 19, for example polystyrene.
The barred windows 5 in principle may be positioned at various levels of the fish silos 4 and distributed in any chosen pattern. In one advantageous embodiment the windows 5 are positioned at predetermined height intervals spaced uniformly at each level and secured by surrounding window lattice 6. For cylindrical silos, for example, the windows are distributed in a circle at predetermined heights around the periphery of the fish silo with protecting cylindrical formed lattice 6. Such measures assure optimal water through-flow and velocity in the silos 4.
Claims (14)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Offshore fish farm apparatus for rearing and breeding fish or similar aquatic animals comprising:
a semi-submersible floating platform, a base frame, and floodable buoyancy columns connecting the floating platform to the base frame with at least one restricted living enclosure for the animals;
each said enclosure comprising at least one silo fitted into said floating platform, closable windows in said silo having bars or grid lattice therein having stability against mechanical stresses and closeness of mesh for providing water through-flow, while protecting and inhibiting passage of said animals and passage of external predators, and a disposal system for impurities collecting in said silo.
a semi-submersible floating platform, a base frame, and floodable buoyancy columns connecting the floating platform to the base frame with at least one restricted living enclosure for the animals;
each said enclosure comprising at least one silo fitted into said floating platform, closable windows in said silo having bars or grid lattice therein having stability against mechanical stresses and closeness of mesh for providing water through-flow, while protecting and inhibiting passage of said animals and passage of external predators, and a disposal system for impurities collecting in said silo.
2. Apparatus as defined in claim 1, said platform and said base frame defining asuspension opening for insertion of said silo.
3. Apparatus as defined in claim 1, comprising vertical slides around the periphery of the silo and cooperating slides inside the suspension opening permitting adjustable vertical displacement of said silo therein, and locking means for fastening said silo in predetermined positions.
4. Apparatus as defined in claim 1, 2 or 3, comprising a plurality of suspension openings being partitioned by crossbars and permitting insertion of a plurality of said silos.
5. Apparatus as defined in claim 1, 2 or 3, said silo being assembled from standardized adjacently arranged disassemblable elements each said elements having at least one of said closable windows.
6. Apparatus as defined in claim 1, 2 or 3, said fish silo being of circular or polygonal cross-section.
7. Apparatus as defined in claim 1, 2 or 3, said fish silo being made from a material selected from corrosion resistant steel, reinforced concrete, plastic, and laminated fibreglass.
8. Apparatus as defined in claim 1, 2 or 3, said fish silo having a funnel-shaped bottom, a pump at a lowest point of said bottom, and a closable effluent duct connected to said pump for disposal of impurities.
9. Apparatus as defined in claim 1, 2 or 3, freshwater, aeration and oxygenation lines being insertable into said silo.
10. Apparatus as defined in claim 1, 2 or 3, and doors for closing said windows.
11. Apparatus as defined in claim 1, 2 or 3, said bars or grid lattice comprising high strength plastic or corrosion resistant steel.
12. Apparatus as defined in claim 1, 2 or 3, said windows being positioned in the silo at predetermined levels and at predetermined spacing.
13. Apparatus as defined in claim 1, 2 or 3, said windows being at predetermined heights and uniform spacing at each height around the periphery of said silo, said windows being protected by cooperating formed said bars or grid lattice.
14. Apparatus as defined in claim 1, 2 or 3, said base frame being constructed from steel tube or, as a box construction, from reinforced concrete with a foamed plastic filling.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3821327.3-23 | 1988-06-24 | ||
| DE3821327A DE3821327A1 (en) | 1988-06-24 | 1988-06-24 | OFFSHORE FISH FARM FOR GROWING AND HOLDING FISH OR THE LIKE WATER ANIMALS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1337894C true CA1337894C (en) | 1996-01-09 |
Family
ID=6357158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000603843A Expired - Fee Related CA1337894C (en) | 1988-06-24 | 1989-06-23 | Offshore fish farm |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0347489B1 (en) |
| CA (1) | CA1337894C (en) |
| DE (1) | DE3821327A1 (en) |
| ES (1) | ES2030480T3 (en) |
| GR (1) | GR3004528T3 (en) |
| NO (1) | NO166511C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7661389B2 (en) | 2005-03-18 | 2010-02-16 | Tuerk Jeffrey E | Aquaculture cage with variable buoyancy spars |
| WO2021053361A1 (en) * | 2019-09-19 | 2021-03-25 | Kimonides Antonis | Polypod deep sea aquaculture farm |
| US11523593B2 (en) | 2017-04-21 | 2022-12-13 | Viewpoint As | Fish pen system with compensation for wave motion |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU627633B2 (en) * | 1989-11-23 | 1992-08-27 | Clarence William Challenger | Mollusc culture support |
| JP3077069B2 (en) * | 1991-12-27 | 2000-08-14 | 恩納村漁業協同組合 | Method and apparatus for culturing aquatic products at sea |
| ES2099680B1 (en) * | 1995-11-06 | 1997-12-16 | Botella Jose Hernandez | CELLULAR MARINE FARM. |
| ES2174759B1 (en) * | 2001-04-11 | 2003-12-16 | Busto Santiago Otamendi | FISHING, FISHING AND TRANSPORTATION FISHING VESSEL |
| AUPR888501A0 (en) * | 2001-11-15 | 2001-12-06 | Total Aqua Management Systems Pty Ltd | A raceway for cultivating fish |
| NO315633B1 (en) * | 2002-02-14 | 2003-10-06 | Brimer As | Fish farming device |
| WO2010025578A1 (en) * | 2008-09-08 | 2010-03-11 | Guillermo Garrido Saavedra | Aquatic-residue collector barrier |
| CN101936037B (en) * | 2010-08-02 | 2011-11-23 | 北京首钢建设集团有限公司 | Large-diameter steel bay zoning-manufacture reverse-order lifting installation construction method |
| GB2501879B (en) | 2012-05-08 | 2015-09-02 | Sea Control Holdings Ltd | Offshore aquaculture system |
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| ES1107805Y (en) * | 2013-10-17 | 2014-07-16 | Offshore S L Sodac | OCEANIC AQUATIC PLATFORM |
| NO341376B1 (en) | 2016-03-02 | 2017-10-23 | Akvadesign As | Buoyancy system for a cage |
| NO341817B1 (en) | 2016-03-07 | 2018-01-29 | Aker Solutions As | Semi-submersible fish farming system |
| DE102016003239B4 (en) * | 2016-03-16 | 2019-02-14 | Christian Beck | Vertically retractable mobile fish cage for use in open sea (off-shore) and coastal / shore areas (on-shore) |
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| WO2017179989A1 (en) * | 2016-04-11 | 2017-10-19 | Seafarming Systems As | A floating fish farming plant and assembly of plants |
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| NO20160781A1 (en) * | 2016-05-10 | 2017-11-13 | Viewpoint As | cage System |
| CA3074011C (en) * | 2017-02-21 | 2020-11-03 | Bemlotek As | Fish farm made of a rigid material |
| NO343042B1 (en) * | 2017-07-31 | 2018-10-15 | Marad Norway As | Fish Farm |
| NO20171836A1 (en) * | 2017-11-17 | 2019-05-20 | Knut Vangen | Procedure for continuous fish farming in a marine aquaculture facility |
| NO344177B1 (en) * | 2018-02-20 | 2019-09-30 | Hydromerd As | Closed cage, as well as a cage construction comprising a number of closed cages |
| CN108308078A (en) * | 2018-04-25 | 2018-07-24 | 中交海洋工程船舶技术研究中心有限公司 | A kind of lift aquaculture net cage plateform system and its abalone culture feeding method |
| NO346189B1 (en) * | 2020-06-26 | 2022-04-11 | Aker Solutions As | Fish farming system |
| NO346937B1 (en) * | 2021-06-16 | 2023-03-06 | Aquafloat | Floating structure for installation in water, a closed ring-structure and a tubular element for building a floating structure, and a method for building a vertical structure |
| NO347982B1 (en) | 2022-12-06 | 2024-06-03 | Fjordmerd As | Aquaculture system for raising aquatic organisms and method of raising aquatic organisms |
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| US3653358A (en) * | 1970-04-06 | 1972-04-04 | Marine Protein Corp | Floating fish growing tank |
| FR2436560A1 (en) * | 1978-09-21 | 1980-04-18 | Ansab Sarl | MARINE CAGE FOR FISH FISH AT SEA |
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| DD201241A1 (en) * | 1981-12-05 | 1983-07-13 | Hahlbeck Wulf Heinrich | DEVICE FOR STORING AND MAINTAINING WATER PETS AND PLANTS |
| SE435671B (en) * | 1983-12-19 | 1984-10-15 | Viking Fish Ab | FISH CULTURE EQUIPMENT INCLUDING ATMINSTONE A BOX OF ADJUSTABLE DEPARTURE AND AIR CLOCK |
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| JPS61119125A (en) * | 1984-11-15 | 1986-06-06 | 森 敬 | Fish breeding apparatus |
| NO158401C (en) * | 1986-02-10 | 1988-09-07 | Einar Knutsen | DEVICE BY FISHEMAER CONSTRUCTION AND PROCEDURE FOR MANUFACTURING DEVICE. |
| GB2200822B (en) * | 1987-02-11 | 1991-01-30 | Ragnar Vadseth | Farming enclosures |
-
1988
- 1988-06-24 DE DE3821327A patent/DE3821327A1/en active Granted
- 1988-07-05 NO NO882985A patent/NO166511C/en not_active IP Right Cessation
- 1988-08-11 ES ES198888113037T patent/ES2030480T3/en not_active Expired - Lifetime
- 1988-08-11 EP EP88113037A patent/EP0347489B1/en not_active Expired - Lifetime
-
1989
- 1989-06-23 CA CA000603843A patent/CA1337894C/en not_active Expired - Fee Related
-
1992
- 1992-05-07 GR GR920400866T patent/GR3004528T3/el unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7661389B2 (en) | 2005-03-18 | 2010-02-16 | Tuerk Jeffrey E | Aquaculture cage with variable buoyancy spars |
| US11523593B2 (en) | 2017-04-21 | 2022-12-13 | Viewpoint As | Fish pen system with compensation for wave motion |
| WO2021053361A1 (en) * | 2019-09-19 | 2021-03-25 | Kimonides Antonis | Polypod deep sea aquaculture farm |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0347489B1 (en) | 1992-03-04 |
| NO166511B (en) | 1991-04-29 |
| ES2030480T3 (en) | 1992-11-01 |
| DE3821327C2 (en) | 1990-11-08 |
| EP0347489A3 (en) | 1990-05-23 |
| NO882985D0 (en) | 1988-07-05 |
| DE3821327A1 (en) | 1989-12-28 |
| GR3004528T3 (en) | 1993-04-28 |
| NO882985L (en) | 1989-12-27 |
| NO166511C (en) | 1991-08-07 |
| EP0347489A2 (en) | 1989-12-27 |
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