JPS60176528A - Breeding apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Subject of invention] The present invention relates to an aquaculture device for cultivating fish and shellfish.

[Background of the invention]

Many methods have been proposed for culturing fish and shellfish. One such method is to float fish cages on the surface of the sea or lake, or several meters below the surface of the sea or lake, and to cultivate fish in the fish cages. However, the method of floating fish cages on the sea surface or several meters below the sea surface is controlled by the weather, and when the sea becomes very rough due to typhoons or storms, there is a risk that the fish cages will be destroyed by the waves. In addition, these fish cages must be carefully selected and installed or evacuated to a place with calm waves during a typhoon.
The disadvantage is that seawater contamination in the inner bay, where the waves are usually calm, and furthermore, the rise in seawater temperature in the summer can cause great damage due to disease and red tide outbreaks. Furthermore, since the sea surface is covered with fish cages and members that support them, large-scale aquaculture also poses the problem of becoming a visitor to navigating vessels such as fishing boats.

Furthermore, recently, as seawater pollution in inner bays has increased, a method has been adopted in which ponds and aquariums are built on coasts facing the open ocean and fish are cultured in the ponds and aquariums.

However, this method requires pumping up seawater into ponds and aquariums even during the winter when fish growth is slow, and even when using the tidal difference, large structures must be installed on the coastline. However, there is a problem in that the expense or construction cost would be enormous.・Also, there are many sandy seabeds with a depth of around 30 meters on Japan's coasts facing the open ocean, but these sandy beaches have little catch of fish and are referred to as sea deserts. However, unlike the inner bay, the waves on the sandy seabed are calm, the seawater is unpolluted, and the water temperature is relatively low even in summer, so there is little worry of disease outbreaks in farmed seafood, etc. Although it has good conditions, it is currently hardly used.

[Purpose of the invention]

The present invention has been made in view of the above points, and uses the seabed at a depth of about 30 meters to protect fish from diseases, prevent them from becoming visitors to ships, and allow a large amount of fish and shellfish to be cultivated at a low cost. The purpose is to provide aquaculture equipment that can.

[Summary of the invention]

The present invention is intended to achieve the above-mentioned object, and is aimed at a water depth 3 at which the temperature of seawater does not reach the temperature that causes disease even in summer.
Utilizing the sea area at around 0 m, a plurality of pillars are driven into the seabed of the sea area so that the tops are located below the sea surface, where they are not visited by ships, and fish cages for cultivating fish are placed between the pillars. An aquaculture device with a structure in which the fish cage is sunk so that the bottom surface touches the seabed, and the fish cage is moored to the support, or a fish cage with a structure in which a net is stretched around the frame is sunk so that the bottom surface touches the seabed,
The aquaculture device has a structure in which the fish cage is moored to a weight such as an anchor sunk in the seabed.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an aquaculture apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view. A concrete pipe 1 is driven into the seabed 2 of a sandy beach at a depth of about 30 m with an appropriate gap provided. This concrete pipe I may be a construction pipe used for foundation work. A fish cage 3 having a structure in which a net is stretched on the outside between the pipes 1 and 1 is sunk so that the bottom surface of the fish cage 3 touches the seabed, and eight holding cages are placed above and below the four corners of the fish cage 3. The member 4 is attached to the support 4
The cage 3 is moored to the support 1 by engaging with the support 1.

The shape of the mooring member 4 is a looped rope.
It may be a simple structure in which the rings are provided above and below the corner and the ring-shaped portions are passed through the support 1. In addition, the part that becomes the structure on which the net is stretched should be made of a rope-like flexible material that can flexibly respond to external forces, but it is also possible to use a pipe-like structure with sufficient structural strength. good. The top of the support is located below the sea level 10 to prevent it from becoming a visitor to navigating vessels such as fishing boats. Further, the mooring members 4 do not necessarily need to be provided above and below, and for example, only the lower mooring member 4 may be provided.

Make the space between support 1 and fish tank 3 sufficiently large.

The mooring member 4 is also provided with play, so that when the fish cage 3 moves due to waves, the movement is absorbed to prevent the fish cage 3 from being destroyed.

FIG. 3 is a side view showing an aquaculture apparatus according to another embodiment of the present invention. In this figure, parts with the same reference numerals as in FIG. The same shall apply). The structure of the cage 5 is similar to that of the embodiment shown in FIG. 1, but a plurality of floats 6 are provided on the upper edge thereof, and a plurality of weights 7 are provided on the lower edge. Mooring members 4 are provided at the upper and lower four corners of the fish pen 5, and the mooring members 4 are passed through the pillars 1 to support the fish pen 5. Further, the mooring members 4 do not necessarily need to be provided above and below, and for example, only the lower mooring member 4 may be provided. The weight of the weight 7 is set to have a gravity slightly larger than the buoyancy of the float 6. Also in this case, the gap between the top of the support 1 and the sea surface 10 is set to a size that does not allow visitors to navigate the ship, as described above.

FIG. 4 is a side view of an aquaculture device according to another embodiment. A fish tank 11 having a structure in which a net 9 is stretched on the outside of a frame body 8 is placed at a depth of 30 m.
The fish cages 11 are sunk on the seabed in front and behind the fish tank so that the bottom surfaces thereof are in contact with the seabed. A plurality of weights 12 are provided at the bottom of the fish cage 11 to stabilize the fish cage.

The fish tank 11 is moored with a rope 14 to a mooring member 13, such as an anchor, sunk on the seabed to prevent it from being washed away by waves or ocean currents.

FIG. 5 is also a side view of the aquaculture device according to another embodiment. A fish pen 11 is provided with a plurality of floats 6 on the upper side of a flexible rope-like frame 8, a plurality of weights 7 on the lower side, and a net 9 stretched on the outside of the frame 8. , the fish tank 11 is sunk so that the bottom surface is in contact with the seabed. By configuring the structure of the fish tank 11 in this way, the frame body 8 has flexibility, so even if the seabed is uneven, the net 9 on the bottom of the fish tank 11 will come into contact with the seabed along the unevenness. .

In addition, since the entire fish tank 11 has flexibility, it can flexibly respond to external forces such as waves, so that the fish cage 11 is less likely to be destroyed by waves or the like.

The float 6 used in the embodiments shown in FIGS. 3 and 5 is, for example, a float that is hollow inside and has a hole in the center for the rope 15 to pass through, as shown in FIG. Good.

In the aquaculture device with the above structure, the bottom of the fish cages 3,5゜11 is grounded on the seabed, so compared to conventional floating fish cages, the fish cages 3,5゜11 are less likely to vibrate due to waves. do not have. As a result, fish that live on the seabed, such as flounder and flounder, can live there without fear, and as the fish cage vibrates like a conventional floating fish tank, fish and shellfish that live on the seafloor, such as flounder and flounder, become nervous. , the problem of extremely low feed intake is eliminated. In addition, on the sandy seabed at a depth of around 30 meters, drifting sand covers the net at the bottom of the cage, making it a perfect habitat for fish and shellfish that live on the seabed. In addition, sea bream, shrimp, crabs, etc. have the habit of digging in the sandy areas of the ocean floor to scavenge for food, making it a good habitat for these fish and shellfish.

When cultivating fish and shellfish using an aquaculture device having the fish cages 3, 5, or 11 as described above, a feed supply device structured such that the tip of the feed supply pipe reaches inside the fish cages 3, 5, or 11 is installed, and it is installed in the sea. The feed may be fed while being monitored by a television camera.

The temperature of the ocean floor facing the open ocean at a depth of around 30 meters does not change as drastically as at the sea surface; even if the temperature near the sea surface is high in the summer, the temperature near the ocean floor is relatively low, and even in the winter the temperature is not very low. No.

Therefore, as seawater temperature rises in summer, diseases that occur in fish become less likely to occur at seawater temperatures near the seabed. In addition, because it faces the open ocean, the waves near the sea surface are rough, but the ocean floor at a depth of around 30 meters is calm, and the structure of the fish cage does not need to be as strong as one built near the sea surface.

Especially during storms such as typhoons, when using fish cages floating on the sea surface, you have to evacuate to a place where the waves are calm each time.
On the seabed at a depth of around 30 meters, the waves are not strong enough to require evacuation, so there is no difficult evacuation work.

In addition, one way to use the aquaculture device with the above structure is to pump up seawater into a pond or aquarium on land.
In the aquaculture method of cultivating fish and shellfish in ponds and aquariums, during the winter, when the growth of fish and shellfish is slow, the above-mentioned fish cages 3,
If you move the fish to May 11 and culture them again on land in the spring in ponds or tanks, you can significantly reduce the cost of winter culture. In addition, when cultivating seafood that is sensitive to high water temperatures, it is possible to protect the fish and shellfish from diseases by moving them to seabed cages during the summer, when the water temperature rises and diseases in ponds and tanks on land increase. . Moreover, the water depth is 3
Many sandy beaches on the seabed at around 0m have not been used as fishing grounds in the past, so large-scale fish farms can be developed without infringing on existing fishing rights.

〔Effect of the invention〕

As explained above, according to the present invention, fish and shellfish can be cultured using the seabed at a depth of about 30 meters, thereby preventing the occurrence of fish and shellfish diseases and allowing large-scale aquaculture to be carried out at low cost. becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a side view of an aquaculture device that is an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIGS. 3, 4, and 5 are aquaculture devices that are other embodiments of the present invention. FIG. 6 is a side view showing an example of a float. In the figure, 1... Support, 2... Seabed, 3, 5.11...
- Fish cage, 4... Mooring member, 6... Float, 7... Weight, 8... Frame body, 9... Net, 10... Sea surface, 12.
... Weight, 13... Mooring member, 14.15... Rope. Applicant Tokyu Musashi Industries Co., Ltd. Agent Patent Attorney Takashi Kumagai

Claims (3)

[Claims] (1) Multiple pillars are driven into the seabed at a depth of about 30 m so that the tops are below the sea surface, and between the pillars, a fish pen with a structure whose outer surface is covered with a net is sunk so that the bottom is in contact with the seabed. , An aquaculture device characterized in that the fish cage is supported by the support. (2) A fish cage with a frame with a net and at least a flat bottom is installed at a depth of 30°C so that the bottom of the cage is in contact with the seabed.
1. An aquaculture device characterized in that it is sunk on the seabed at a depth of about 100 m, and the fish cage is moored to a mooring member sunk on the sea bed. (3) A fish pen with a structure in which a plurality of floats are provided on the upper part of a flexible rope-like frame, a plurality of weights are provided on the lower part of the rope-like frame, and a net is stretched over the frame. An aquaculture device characterized in that the fish cage is sunk on the seabed at a depth of about 30 m so that the bottom surface of the cage is in contact with the seabed, and the fish cage is moored to a mooring member sunk on the seabed.