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1. WO2019045582 - INNOVATIVELY SUSTAINABLE FISH FEEDING WITH AN ADVANCED CATCHING SYSTEM

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

Innovatively sustainable fish feeding with an

advanced catching system

The field of the technique to which the invention relates

The innovation presented here is the concept, how to use the available resources of nature for cultivation and selective fish capturing, in a technologically acceptable way. For example, fjords and bays can be used with the use of an innovative barrier, which would provide a natural habitat for fish breeding. The tide would provide the flow of nutrients from the open sea. Marine currents would partly enable the cleaning of the bay from the natural waste generated by the fish breeding. In the so-formed natural habitat, innovative feeding units would be used to allow intermittent feeding and independent fishing.

Ships that use the current way of catching fish in nets would become unprofitable and obsolete as their fishing way is harmful to the ecosystem of the sea comparing to the presented innovative technology. The applied innovation of fish cultivated in an ecological way, it can be harvested and caught at sea, ocean, lake or river. Instead of the current fish catching nets, innovative traps with feeders for the selective fish catch would be used. Applied technology would catch bigger fish, while small fish would pass through passages in a perforated canvas or net. In a way where the fish itself would be calibrated when caught by the size of the holes in the net, or by the size of the fish itself. With the use of innovative technology, the current, not selective catch of fish would diminish. Today, the fish is protected only by law, but not by the technological process of harvesting. The application of this innovation solves the disadvantages of the current catch of open water fish.

According to the International Patent Classification, the invention is marked with the basic classification symbol A01 K, which denotes technologies among others for the method of fish breeding and fishing, the technology of breeding all kinds of animals to the end product method. With the primary classification symbol A01K 61/10 (2017.01 ), which regulates the technology and methods applied in fishing. Also with the classification symbol A01 K 61/60 (2017.01 ), which regulates fish breeding on floating fish farms. The additional classification symbol A01 K 61/70 (2017.01 ) regulates the field of artificial fish habitats and artificial places for fish staying, which are located just below the sea level.

Technical problem

The current technology of fish farming is mainly based on pond technology or the use of cages for growing fish in an open habitat. The current technology for fish breeding has not enough solved how to feed the fish effectively. These disadvantages are solved entirely by the application of innovative feeding technology.

Current fishponds on the mainland would get an innovative feeding platform that would provide the regular feed for the fish. In a way, the food would be consumed at a 100% rate, where the fish would be self-served at the time when needed. When a fish has a regular diet and eats as needed, it does not produce excessive fatty deposits. Unlike today's intense fish breeding, where food consumption is also increasing, which also produces excess fat in the body of the fish. Current feeders generally throw granules into the water, food ends up partly on the bottom or remains trapped in a sludge unused.

In smaller ponds, the feeders would serve for feeding, and as a place where fish would be caught when needed by manipulating the feeder. Today's method of catching fish in the pond is mainly based on the net, which is towed. Working with today's technology is demanding, and it does not give the best economic results. By pulling the net along the bottom of the fish pond, the fish is unloaded and buried in sludge. Thus fish catch is limited, insufficiently efficient and expensive.

The innovative method uses rational and smart technical solutions, not hard work. This way fish can grow in a fishpond or open water and can be easily caught at the right size and ages. When the fish is hungry, it comes to an innovative feeder located beneath the surface of the water, which has an additional purpose and becomes bait for catching fish. There are three basic types of innovative feeders, which also serve for the fish catch. Feeding is done in several technical variants, with its vertical pulling or closing of technical holes, it becomes a further trap for capturing fish.

In open water, fish are now grown in cages. This is an expensive and limited space for fish farming, where large amounts of material are consumed per kilogram of fish. Innovation foresees partly the use of an open sea or a natural swimming pool with water, use of fjord or bay, an artificial lake that is an integral part of the existing hydroelectric power plant. In other words, open water surface where there is water flow, tidal flow, or enough flowing water in the river. Use of existing places where functional perforated canvases or nets would be installed, as a barrier required for the acquisition of large fish farms. Thus, the fish would be grown in large quantities, fed through ecosystems and additionally fed with innovative feeds.

The innovative feeder would be periodically supplied with food. The supply of the feeding plant would be with the help of a boat or a ship, depending on the size and type of fishing grounds. Feeders would be large or small size, different types of production with foreseen basic innovative solutions for the necessary fishing ponds. With larger feeders the flocks of fish would enter the feeders and eat, giving them freedom and less stress. With such a feeding habit, fish would not lose weight, and meat quality would be similar to fish caught in natural habitats.

An additional solution for the setting of an innovative canvas or netting is a barrier that would serve against a shark passage in a protected zone, and larger jellyfish and other dangerous marine animals on the beach area with swimmers. Installed perforated canvases would form a protective belt along the seashore or the ocean.

Today, fishes are mostly caught with the fishing nets in open waters with the help of ships. Usually used surface and depth nets. With its pulling, the depth fishing nets are destroying the seabed ecosystem. Nets, when broken, mostly remain on the seabed. Where millions of already thrown nets pose a danger to animals and fish, which are subsequently and continuously trapped in them, where they later die. The current way of catching would be replaced by selective and humanitarian way of fish catching with the help of an innovative platform.

Such innovative platforms would reduce the use of fishing boats, rationalize the economic and technical ways of catching fish. This would create conditions for the ecosystem to recover and allow the young fish to grow to full maturity. Innovation provides the possibility that fish catching has the same capacity, compared to the use of current methods. With a tendency to increase catch, not decay, as the fish will be further fed and looked after. It should be emphasised that from innovative traps, fish with water is sucked on the boat by moving tubes.

State of the technology

According to the state of the technology of the aforementioned patent solutions in the document on the report, it can be noted, and by the number of solutions, state the following:

CN 105191839 A is an innovative solution that has similarity to the site of the setting of the technical barriers described here, to form a fish pond. Primarily, it is the site of the setting in the seacoast or fjord, where the cables are partly stretched over the surface of the water and hooked to the shore. Unlike the innovation described here, which uses floating elements on the surface of the water, to which the carrier cables are attached. Thus all the cables are placed below the water level. The innovation described here, in addition to the sea gulf, can be applied on the open water as well. For example, along with the coast, on the part of the reservoir or the river, on the open sea, etc.

The described solution in the patent CN 105191839 A uses a generally trampled classical net as a pond barrier into which fish and animals can be stuck from an external environment, and it is not safe. As long as the innovation described here uses a perforated canvas with circular gaps or a specific net, or it uses curtains made of chainrings. Uses interconnected cables as a constructive grid, while in the intermediate space, for example, rings made of plastic or curtain made of perforated linen, a combination of these elements.

US 5193481 A is a method for breeding fish in open water in a limited space, with differently used materials, nets and their positions. As this innovation described herein has three primary goals of the technological application. The first objective is to form the previously described mega fishponds, in which fish are fed freely with the innovative feeders setting. The second goal is to establish a free-feeding place for fish with automatically calibrated catches of fish in seas, oceans, reservoirs, ponds, etc., without the use of classical ships with nets. The third goal is to form cages with innovative feeders, with fish feeding and size calibration places, for sustainable fishing. As well as the protection of marine fish farms from predators, with selectively targeted and trapped fish.

US 2004139924 A1 is an innovation that is significantly different from the overall technical solutions that deal with the innovation described here.

US 5299530 A is an underwater cave solution where the fish remains trapped in a small area, the secondary cages. This innovation presented here represents the technology where the fish is free to move in open water spaces. Fish are fed regularly and willfully until the time of the planned automatic selective catch. Fish during the growth period is not exposed to viral infections, which now dominate in the smaller spaces.

Presentation of the essence of the invention

An innovative fishpond is located in a bay or fjord, accumulation lake or part of the river. In a way that a barrier is placed and a greater volume of water is allocated, required for the cultivation of fish. The barrier is placed at the entrance of the bay, or a part of the coast is separated. Boats, vessels, as well as other vessels required for feeding and catching fish, can unabstracted go above the barrier after the applied technical conditions. The barrier consists of a perforated canvas or net, attached to the bottom to the striped concrete weights. Cables interconnect actual concrete weights. At the other end, the barrier is hooked to the supporting chambers filled with air, which freely float on the surface of the water. Thus, the supporting cables are attached to the load chambers filled with air, which are floating and are fixed on the surface of the water. Thus, the load chambers are located on the surface of the water, connected with the described cables for concrete weights located at the bottom. By setting the perforated canvas, there is no free passage of the large fish to the feeding site, and vice-versa, the farmed fish is prevented from going the outside of the feeding area. The perforated canvas is interconnected at the places of stretched and connected cables, where such positioned cables serve as lattice carriers of canvas, nets or metal rings.

Barriers made from stretched perforated canvas are suitable to protect people from sharks in places where there is a need. Canvas can be transparent for the passage of light. Sturdy, with many peripheral openings, which generally overlay the surface of the canvas. Example, with concentric circuits or interconnected rings, corresponding smaller and larger dimensions. Then we get openings for free passage of small animals, planktons and other nutrients from the sea, necessary for feeding the fish. As the passage of large fish, like the shark, stops. Unlike conventional nets, this type of barrier is harmless to marine animals. For example, turtles and fish cannot be stuck in the so-made canvas with concentric circles, because there is no technical place for it to cling on the fins or limbs of the turtle. With the innovative solution was avoided for the fish fins to be caught as it is common to the classical nets.

The fish farm is formed in a suitable marine bay or fjord, which separation is provided with an innovative barrier. This way we get a suitable place for fish breeding, where innovative feeders are placed wherever needed. Innovative feeders are positioned as needed, along the bay or the coast. In a way that they are attached to buoys located on the surface of the water, the bottom part is anchored through the bottom of the sea, the lake or the river. Innovative feeders are based on the platform principle, located below the water surface. Food is stored there for the many days' needs, and in which fish regularly has a self-service. This way the fish without excessive stress and protected from predators, regularly consume food.

An innovative feeder is a platform made of perforated canvas or a net in a shape of a bathtub. It is twisted around the perimeter utilising cables or other technical solutions. Connected with cables to the buoys or construction, located at an appropriate depth below the surface of the water. This way the fish are allowed free entry and exit to the feeder. Perforations on the feeder keep the food granules clean, while physiological fish waste and generally waste from water passes by the food and through the perforated canvas, falling towards the bottom of the seabed. The innovative feeder is made in various sizes and various variants of the setting suitable for the described breeding and hunting of the fish. The method of making a feeder is the individual for the place of the setting and type of use. In the open seas or oceans, specific feeders are used to help ecosystem recovery, modified variants. Then, in rivers and lakes, specifically for the fish weight and size. While in the current flowing and standing fishing ponds and fishing

areas, modified feeders would perform. Feeders would additionally serve as bait, or as a hunting party for fishermen. Miniature feeders would attract fish for professional or recreational fishing. The innovation mainly covers three types of feeders, which are then modified as needed.

The first and basic model of the innovative feeder is the type of bathtub, which serves the fish to freely enter and exit from it, and feed if necessary. Such a type of feeding innovation can serve as a trap for periodic catching of fish. It is located below the water surface with the help of cables and buoys. On the buoy, there is a system of management and manipulation of the fish catch with the help of the winch. All tracked with sensors and signals for managing workflows. Equipped with all the necessary technical details for the automatic or manual handling of the catch. Processes are controlled directly or remotely. Feeding and catching fish can be controlled from the land or mobile via an application on a mobile phone, device. The feeder is provided with the necessary technical devices with a winch, to catch the fish by lifting the bathtub, up towards the water surface.

The second model of the feeder is a type of basket with an embossing net or a perforated canvas, a curtain made of plastic or metal rings, or a combination of all mentioned materials. It is positioned below the surface of the water, with the top floating on the surface of the water with the help of air chambers. For example, it can be done with a floating path built of styrofoam with a metal structure. The feeder is positioned inside the basket, which serves to lure the fish inside through the projected opening. The opening and closing of the aperture are easily controllable. When caught, the large fish is in the basket until the boat or ship has reached it. At the same time, smaller fish passes through a perforated canvas or a technical net and is still freely fed over with a caught fish.

The third model is a cage feeder, located entirely under a water surface, positioned at a certain depth. Its top is below the surface of the water, where the position is maintained with the help of cables with underwater buoys, air chambers. At the same time, the cage is tied to the bottom using cables with anchorages. The feeder that is placed in the cage oscillates in its free horizontal movement with the cage. All the above described technical solutions, if necessary, also follow this model of the feeder. On a cage-type feeder, there are planned openings on the side or the underside of the cage, more than one. The

openings serve for large fish to enter and exit the cage, until the moment of planned capture when the openings are closed.

An innovative feeder that the fish has got used to existing is used as a bait for capturing fish. An example of the application at sea, below the described feeder, there would be the platform for capturing the fish. The platform would move vertically in the direction and at the location of the cables, that is, the basic place of its movement up or down. The direction of movement for catching the fish is from the bottom to the surface of the water, in the opposite direction the platform moves towards the bottom where it stays at its basic position. With the help of trapped air in the chambers, it has a steady potential and the necessary force for the instant catch of fish. The task, the position and the described functions of the work, so that at the appropriate moment the platform moves towards the surface of the water, where it captures the fish around the feeder. At that time, the perforated canvas or ring-chain net described above would capture large fish, while small fish would pass through appropriate circular holes. This way, a selective catch of fish, as defined by law, is technically enabled, followed by the future new standards for the sustainable development of the fish fund.

An innovative fish catching platform is made of interconnected rings, perforated canvas or net, stretched between the supporting structure. Chambers filled with trapped air are placed on the supporting structure. The perforated canvas, in this case, is made with circular openings. When the platform is on the move, then water and small fish pass through it, while the big fish is caught. A fish that fails to pass through the prescribed and appropriate dimensions of the opening is caught at the surface of the water. Dimensions of the holes are of the appropriate size required for catching the appropriate type and size of the fish. Circular openings are suitable, but not the only solution, and they can be openings in the shape of an ellipse, or the passes in the form of a grill, etc. The necessary openings on the canvas can be additionally supported by stitching, or with the addition of rings around which the canvas is quilted. Also, the holes can be additionally supported with rubber, plastic or pressed circular metal rings, etc.

The platform drive is created with the help of trapped air, placed under the surface of the water in the intended chambers. The direction of movement of the platform is controlled and directed with the direction of the installed cables on the perimeter of the platform, which serve as guides. Needed cables are tightened and set up from the individual load-bearing buoys on the surface of the water, to the anchorage located at the bottom. The platform under the water pressure moves at a projected speed, where the thrust calculation is obtained from the air volume concerning the platform's dimensions. Perforations on the canvas would be adjusted for the required speed of the platform's movement through the water.

An electronic device would control all operating parameters of the platform with sensors and cameras and other equipment. The equipment would be located on the platform itself, connected by cables to the buoys on the surface of the water. The signal buoy can also be separated from the structure to float independently. Furthermore, the platform is connected by signals with a feeder buoy, a place on the land, from where it would be managed controlling or to catch of the fish. The technically equipped platform would provide information in the real time, how many fish were caught, in what period, or is there enough fish caught for a cost-effective commercial catch, etc. For example, if the insufficient or protected fish were caught, the platform would return down, and go back to the starting position for a future better attempt to capture the fish. On that occasion, the captured fish would be freed automatically, until another more successful hunting.

Platform for capturing fish in seas and oceans can be a larger or smaller diameter of 100 m. These are the large dimensions of the platform with the necessary equipment, where it is not technically suitable for retrieving the platform on to the ship. For this reason, and fish extraction an additional innovative buoys have been made. A dedicated, innovative buoy for catching fish is projected in the required dimension. On the upper surface, there are rollers mounted regularly, over which the platform part is overtaken by the two boats that move in the opposite direction. The fish is separated in one part of the platform, where it is then vacuumed with water pipes, placed on the boat, and then the platform returns to the starting position. This way of catching fish contributes to reducing the use of unrentable ships with crews, allowing controlled and selective fish catch with automated equipment. If necessary, an additional mobile system for the transmission of information to the land would be developed. Information is exchanged, that hunting is successful and that it is safe to come for a commercially viable catch of fish. This prevents excessive costs, where innovation develops and improves the ecosystem of the sea and ocean, including the local ecosystems.

A brief description of the drawings

The desired form of the invention is described in the accompanying drawings, which may explain the principles of the invention, but is not limited to these technical models of the use of the concept, and these are described features that are utilising the invention itself. Pictures illustrating:

Picture 1. A scheme, top view of the bay with possible barrier setting and innovative feeders according to the invention, all for the needs of an innovative fish-pond,

Picture 2. A scheme, side view and top view of the setting of an innovative feeder for fish following the invention, for the purpose of self-serving fish with food,

Picture 3. A scheme, side view and top view of the possible setting of the platform for selectively capturing fish following the invention, the location of the starting position and the vertical operation of the platform below the surface of the water,

Picture 4. A scheme, side view and top view of the technical parts of the platform during the fish extraction following the invention, with a position of dedicated, innovative buoyancy,

Picture 5. A scheme, a three-dimensional display of a moving basket with a feeder, a position of the opening that opens and closes with the help of the winch with the cable, where the basket together with the feeder is lifted and lowered in relation to the surface of the water,

Picture 6. A scheme, a three-dimensional solid cage with grids and feeders, an opening position that is opened and closed through a motor with a reduction, where the process of selective catching and feeding the fish until the catch is taken,

Picture 7. A scheme, a three-dimensional view of the roller-shaped fish catcher, with an opening position that is proportional to the half of the vertical surface of the roller, where the motor with the reduction intercepts the roller construction by rotation, like this it selectively seizing and nourishing the fish until the catch,

Picture 8. Display of separated parts of the canvas, net with reinforced circular openings, interconnected binds forming a curtain, an overview of the part of the perforated canvas feeder, where the design and use of the material can be unlimited.

A detailed description of the invention

Picture 1. shows a top view of the bay 5, the possible setting of the barrier and innovative feeders 6, all in accordance with the invention, and for the needs of the innovative breeding ground 2. The barriers are made of perforated canvas 15 or interlinked rings, already described in detail. The barrier is vertically and laterally connected, fixed and secured with the corresponding cables 8 at the intended position. The carrying cables 8 are positioned from the level 10 of the water, towards and until the bottom 3. The barrier is secured and positioned with the anchorages 13 at the bottom 3. The perforated canvas 15 is made with necessary, mainly circular or elliptical openings. Thus, the openings allow the free flow of water and the passage of small animals, while stopping the passage of the fish 7 from the farm 2 to the outer environment.

For this reason, the perforated canvas 15 is hooked to the load chambers 14 filled with air, at the water level 10 and lowered to the bottom 3. In this way, the bay 5 becomes a natural fish 7 farm 2, in which the necessary number of innovative feeders 6 are placed and distributed. Vessels 4 are provided with passage route, for the possibility of supplying the feeders 6 with the necessary food. Feeders 6 are attached to the buoy 9, which is located at the level of 10 water. The platform 11 of the feeder is positioned at the projected depth, and the fish 7 is freely fed by self-service. The signalling and control devices 16 monitors and perform all necessary functions of operation, as already described.

Picture 2. Shows a side view and a top view of the parts of an innovative feeder 6 for fish 7, in accordance with the invention and for the self-serving of fish 7 with food. A feeder 6 is with the help of the buoy 9 positioned in the water level 10, attached with belonging cables 8. Cables 8 like this are connecting feeder platform 11 to the buoy 9. Feeder platform 11 is positioned and anchored to the bottom with the anchor 13. The feeding is made like a bath-shaped, provided with the necessary supporting structural elements. The feeder platform 11 is located at the appropriate depth for the right needs of the fish 7, below the water level 0 so that the fish 7 can freely enter and exit from it. The feeder platform 11 , on the bottom and the side, is made of perforated canvas 15 or net. The perforated canvas 15, in this case, is made with small slits, necessary for the fish waste passing, while the food granulate is retained on its surface. As required, the fish food is delivered by boat 4. The feeder 6 dimensions can be from 0.1 m2 to 100 m2, depending on the requirements and preparation.

Picture 3. Shows a side view and a top view of the parts of the platform 12 for the selectively fish catching 7, all in accordance with the invention. Platform 12 for fish catching in its position 7 is fixed with support cables 8 and anchor points 13. On the platform construction, 12 are respectively placed air-filled chamber 14, evenly distributed along the edge. Platform 12 is positioned at the bottom 3 or a certain depth, as needed. The 12 fish catching platform 7 with some devices 16 has the technical ability to operate manually or automated. Necessary devices 16 are housed on hooks 8, platform 12, stand-alone buoys. Devices 16 are interconnected to operate work processes with the help of sensors and cameras. When the fish 7 is located in the feed zone 6, the platform 12 automatically or manually reacts, and then later controls the catch. By using the generated power of the bridle continuously by the arranged air-filled chambers 14, the platform immediately 12 accelerates to water 10 level. Then the platform 12 in its path catches the fish 7, transfers it and seals it at the water 10 level. The air-filled chambers 14 with the platform part 12 extends above the water level 10, where it is retained if needed. The withdrawal of the platform 12 towards the bottom 3 is with the help of an electric motor with reduction and brakes, on the path with the carrier cables 8. Electricity is obtained from a battery, charged from solar panels on a buoy 9. If necessary, the brakes are opened and closed at the position of the cable 8. Then firmly position the platform construction 12 at a given depth, and then it is prearranged released, similar to the lift brakes.

At the fish 7 catching platform 12, a perforated canvas 15 or a net, curtains of interconnected rings are tightened. The perforated canvas 15 catching on a large fish 7

that is allowed to catch, while the small fish 7 passes through the intended gaps. Perforated canvas 15 is made with openings, which calibrate captured fish 7 by the size. So large fish 7 cannot pass, remains trapped by the time of arrival of the ship 4 that is taking a catch. The device 16 with the control system, via the sonar and signal at the buoy 9, transmits the information about the captured fish 7 towards the shore, and vice versa.

Picture 4. Presents a side view and a top view of the technical parts, the position of the buoy 17 for the catching of the fish 7. Where the position of the air chamber 14 maintains the platform 12 for catching fish 7 above the water level 10. The fish 7 caught in this way, cannot escape outside of the perforated canvas 15. With the aid of two vessels 4, the fish 7 catching platform 12 has retreated in the opposite directions. It is necessary to adapt and narrow to be dragged and pulled over the buoy 17. The platform 12 is overlapped by the buoy 17 in order to exclude the fish in the part that is not exceeding the buoy 17. Thus, the fish 7 is separated and concentrated in the rest of the perforated canvas 15, where it is subsequently vacuumed onto the ship 4. The buoy 17 on the upper side, is made with in-line rollers over which the platform 12 is pulled over.

Picture 5. is a diagram, a three-dimensional view of the moving basket 19 with feeder 6, attached to the floating construction 22. Where the opening position 24 of the construction is occasionally opened and closed with the help of a cable and winch 8. The winch with the cable 8 drives the electric motor 21 with the reduction, when the basket 19, together with the feeder 6, is lifted and lowered to the water level 10. The closure 20 is the primary support for lifting the moving basket 19 towards the water level 10 when the large fish 7 is trapped therein. It is the same process of catch selection as in the other examples, and the fish 7 is calibrated by passing through the openings in the net 5 or construction. Basket 19 floats in the water level 10 using a chamber filled with air 14 or with a polystyrene construction. While the innovative feeder 6 is located beneath it, it is fixed with the cable 8. At the opening of the construction 24, the cable 8 is centred, for the up and down movements. This way, the opening 24 is closed with the aid of the shutter 20, which then correctly fits into the opening 24. This is the only place where the big fish 7 enters on the path to the feeder 6. On the chambers 14 filled with air, a tent construction is made. Where on the top of the construction there is an electric motor 21 with a winch and a reducer, and a device 16 for signalling and control of the work of the catcher.

Picture 6. is a diagram, a three-dimensional view of the solid cage, a construction 23 made of a grid in which the feeder is located. 6. The position of multiple openings 24 on the construction, which are closed and opened simultaneously with the help of a linear grip and a sprocket, a flexible seal 20. The drive is secured by the use of an electric motor 21 with a reducer, where the operation process selectively catches and feeds the fish 7 until the catch is collected. The grid structure 23 is located below the water level 10, positioned with an air-filled chambers 14 and anchorage 13, through the associated cables 8. Above the water 10 located is only the buoy with the device 16 for signalling and control of operations. Feeder 6 is fixed on the upper part of the cage with a cable 8. The innovation is applicable on the open waters when the fish 7 freely enters the cage and is being fed at the feeder site 6, until the moment of the controlled closure of the opening 24. Fish 7 is mainly calibrated by passing through the cages gaps.

Picture 7. is a diagram, a three-dimensional view of a roller-shaped catcher, which has a static lower and upper structure. With a series of openings 24 on the structure, which are approximately proportional to the half of the vertical surface of the roller. Where the electric motor 21 with reduction and the use of the sprocket, slits openings 24 on the roller construction, mutually rotate them in the opposite direction. This way, the openings 24 of the roller construction are controllably open and close, selectively capture and nourish the fish 7 until the catch collection. The roller-shaped catcher is located below the water level 10 using the buoy 9 and the cables 8 attached to the anchorage 13. The roller-shaped catcher can be placed in open waters using conventional buoys. With the help of the cables 8, feeder 6 is fixed on the upper part of the catcher so that the fish 7 can enter into it. Fish 7 was mostly calibrated by passing through grille holes. The openings are designed for stopping the prey fish from entering.

Picture 8.1 , where a portion of the canvas 15 is shown, a possible arrangement and the location of the perforations and circular openings 25 is shown. The aperture 25 is further coated with rubber or plastic, or other materials. The gaps in the canvas 15 should cover a larger surface than the rest of the canvas 15. The rest of the canvas 15 can be reinforced by adding the steel or plastic mesh. Picture 8.2, where the mesh 15 is made with reinforced circular openings 25. Picture 8.3, where the rings are interconnected 26. Metal rings 26 continuing as a chain, that is a bearing structure, while the plastic rings 26 fill the formed intermediate space. Rings 26 can be made of wire, coated with rubber or

plastic. Picture 8.4 is part of the feeder platform 11 that holds the food granules while the unwanted material passes through the perforations.

In these solutions and positions of innovation, the design and use of materials are unlimited. Certain innovative parts are made of thinner and thicker materials, with different stiffness and flexibility. For example, the parts made in this way are less wearable, so that technology has long-term exploitation.

The manner of industrial or other application of the invention

Innovation is applied in closed or open water locations. Technology is used for fish feeding, catching and keeping it in natural conditions until the time organised the collection. Innovative technical elements can be used individually or in combination on existing fishponds, on the part of the sea, lake or river. In general, innovation is used for the feeding, nurturing and selective and economic catch of the fish. Specific or smaller parts of the innovation can be used as innovative baits for sports and commercial fishing.

The innovative feeder can be used as a platform for fish breeding.

Position in the pictures

(1 ) shore

(2) fish farm

(3) bottom

(4) vessel

(5) a bay or a fjord, part of a lake or river

(6) feeders

(7) fish

(8) the cable

(9) the buoy

(10) water level

(11 ) feeder platform

(12) the surface of the platform for fish catching

(13) anchorage

(14) chambers filled with an air

(15) perforated canvas or a net, curtain of rings

(16) signalling and control device

(17) buoy for the fish catch

(18) water

(19) the basket

(20) shutter

(21) electric motor with reduction

(22) a floating construction

(23) the grid structure

(24) an opening on the structure

(25) an opening on a canvas or net

(26) rings