JPH08107734A - Net device for catching fish or the like and culture of squid using the same net device - Google Patents

Abstract

PURPOSE: To provide a device capable of effectively catching and recovering small live fishes and other fishes required for culturing squids or the whole other culture fishes. CONSTITUTION: This net device A comprises a float supporting member 10 arranged on the surface of the sea S and a net member 12 held by the supporting member 10 and having its lower part arranged in the sea. The net member 12 has an outer wall net part 18 circularly hung downward and an inner wall net part which is arranged so as to direct upward from the lower end part side of the outer wall net part 18 inside the outer wall net part 18 in such a way that the lower end side of the inner wall net part is opened so as to form a recessed part 24 with difference in level in the interior and a top opening 26 is set at the upper end side. The top opening 26 is equipped with an opening and closing device 32 and a light source 58 is arranged in the interior N of the net member 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net device for catching bait for aquaculture of fish or various kinds of fish, and a squid aquaculture method using the net device.

[0002]

2. Description of the Related Art Conventionally, fish culture baits are administered with fish meal or bone meal according to the growth stage of the fish to be cultivated, or when the cultured fish grows to a certain size, fish fillets are administered. Are growing. By the way, for example, squid and the like have a very high demand for food in Japan, and fisheries operators, research institutes, or aquaculture experts in various regions are trying to cultivate this and artificially grow it into adults. However, the fact that squid is so cannibalistic, and it is difficult to analyze and determine the effective squid food in the growth process, and it is difficult to secure this, is the fact that it has not been realized yet. Is. The applicant has eaten plankton in the sea at the time of hatching of fish etc. by many years of research, and eats small live fish such as fish eta fish until it reaches a certain size,
When I grew up again, I re-recognized the habit of eating larger fish.

[0003]

SUMMARY OF THE INVENTION From the above-mentioned points, it is effective to use an effective bait for aquaculture fish or the like, or a means for capturing fish or the like, and these devices that can be put to practical use at a low cost. There was a strong demand for the realization of a squid farming method.

The present invention has been made in view of the above conventional problems, and one of the objects thereof is to effectively capture and recover live small fish and other fish that serve as baits for squid and other cultured fish in general. It is an object of the present invention to provide a net device for capturing fish and the like. Another object of the present invention is to provide a method for cultivating squid, which is difficult to cultivate using squid, which has a simple structure and is extremely practical at a low cost.

[0005]

In order to achieve the above object, the present invention provides a floating support 10 arranged on a sea surface S.
And a net body 12 which is supported by the floating support body 10 and whose lower portion is arranged in the sea. The net body 12 is
An outer wall net portion 18 that hangs downwardly in an annular shape, and is connected to the outer wall net portion 18, is arranged inside the outer wall net portion 18 from the lower end side of the outer wall net portion 18 upward, and has a stepped recess 24 inside. Has an inner wall net portion whose lower end side is opened to form an upper opening 26 at the upper end side, and the inner wall net portion 18 and the inner wall net portion 20 partition the inside N and the outside of the net body 12. In addition, the upper opening 26 of the stepped concave portion 24 is used as a communication port between the inside and the outside, the opening / closing device 32 is provided in the upper opening 26, and the light source 58 is arranged in the inside N of the net body 12. It is composed of a net device A for capturing fish and the like.

Further, in the net device for catching fish or the like according to claim 2, the floating support 10 may be formed in a polygonal shape or an annular shape.

Further, in the net device for catching fish and the like according to claim 3, the outer wall net portion 18 is hung substantially vertically, and is connected to the lower end of the outer wall net portion 18 in a substantially horizontal direction to the bottom wall net. One end of the portion 22 is connected, and further, the inner wall net portion 20 is connected to the other end side of the bottom wall net portion 22 in a substantially vertical direction to stand up, and the outer wall net portion 18, the bottom wall net portion 22 and Inner wall net 20
It may be configured to be connected in a substantially U-shaped cross section.

Further, in the net device for catching fish and the like according to claim 4, the opening / closing device 32 of the upper opening 26 of the step recess 24 includes a net lid 38 attached to the upper opening 26 so as to be openable and closable. Is also good.

Further, in the net device for catching fish etc. according to claim 5, the opening / closing device 32 is provided with the upper opening 2.
6 may be provided with a net lid 38 that is openably and closably attached, and a time drive mechanism 44 that drives the net lid 38 to open and close in a timed manner.

Further, in the net device for catching fish and the like according to claim 6, the net lid 38 is always provided with the upper opening 2.
6 is biased in the opening direction, and the timed drive mechanism 44 is
Is a rope 46 linked to the net lid 38 so that the net lid 38 can be opened and closed, a load portion 48 connected to an end portion of the rope 46, and a load activation for the load portion 48 in a timed manner. The timer 50 may be included.

Further, in the net device for catching fish and the like according to claim 7, a lateral opening 62 which can be opened and closed may be provided at an arbitrary position of the outer wall net portion 18.

Further, in the net device for catching fish and the like according to claim 8, a shape retaining member 60 may be provided at each corner in order to maintain the shape of the net body 12 in the sea. good.

Next, in the method for cultivating squid using the net device for catching fish and the like according to claim 9, the floating support 10 installed on the sea surface and supported by the floating support 10,
A net body 12 having a lower portion arranged in the sea, and the net body 12 has an outer wall net portion 1 that hangs annularly toward the lower portion.
8 is connected to the outer wall net portion 18, is arranged upward from the lower end side of the outer wall net portion 18 inside the outer wall net portion 18, and is opened at the lower end side so as to form a step recess 24 inside. In addition, it has an inner wall net portion 20 having an upper opening 26 on the upper end side, and the outer wall net portion 18 and the inner wall net portion 20 partition the inside N and the outside of the net body 12, and the step recess 24 The upper opening 26 is used as a communication port between the inside N and the outside, and the opening / closing device 32 is provided in the upper opening 26, and the net body 12
A light source 58 is arranged in the inside N of the fish, and a small fish or the like F is captured in the inside N of the net body 12 by the nighttime illumination action, and the squid after hatching captures at least these small fish in the net body 12. The method for cultivating squid is characterized by including the step of administering F, etc.

[0014]

The net device for catching fish and the like according to claim 1 comprises a floating support placed on the sea surface and a net body supported by the floating support and having a lower portion placed in the sea. The body is connected to the outer wall net portion that hangs downwardly in an annular shape, and is arranged inside the outer wall net portion from the lower end side of the outer wall net portion toward the upper side to form a stepped recess inside. So as to open the lower end side and to have an upper opening on the upper end side, the inner wall net portion is provided, and the outer wall net portion and the inner wall net portion partition the inside and the outside of the net body, and the stepped concave portion The upper opening is used as a communication port between the inside and the outside, an opening / closing device is provided in the upper opening, and a light source is arranged inside the net body. When illuminated at night, large fish below the lower end opening of the stepped recess of the inner wall net circulate in a loop or loop and do not try to enter the stepped recess by habit. The fish that enter the stepped recess are generally fish having a body length of about 10 to 20 cm. Moreover, these fish do not try to enter the inside of the net body due to their habits. Thus, the length of the net body is 1 cm to 2
A large amount of cm-sized shrimps, sardines and sardines are caught. Then, the net portion of the inner wall is raised and collected by a scooping container or a pump.

In the second aspect, since the floating support is formed in a polygonal shape or an annular shape, it suffices to form a net body with a similar outer shape, which is easy to manufacture, and is attached and tightened to the floating support. Can be done smoothly.

According to a third aspect of the present invention, the outer wall net portion hangs in a substantially vertical direction, is connected to a lower end of the outer wall net portion, and is connected to one end of the bottom wall net portion in a substantially horizontal direction. The inner wall net portion is connected to the other end side in a substantially vertical direction and is arranged upright, and the outer wall net portion,
The bottom wall net portion and the inner wall net portion are connected in a substantially U-shaped cross section. It is easy to maintain the shape of the net body in the sea by using a shape-retaining member and the like, and it is only necessary to cut the fishnet net in a straight line, which improves the yield and enables efficient use of the material.

In the present invention, since the opening / closing device for the upper opening of the stepped recess includes the net lid attached to the upper opening so as to be openable and closable, these devices can communicate with each other inside and outside the net with a simple structure. It can be opened or closed.

According to a fifth aspect of the present invention, the opening / closing device includes a net lid attached to the upper opening so as to be openable and closable, and a time drive mechanism for driving the opening and closing of the net lid in a timed manner. By operating at the set time and closing the net lid, it is not necessary for the operator to bother to close the net lid at the time of dawn and perform collection work, etc., and collect at a desired time such as when the temperature is cold. Work can be done, and recovery work efficiency will be greatly improved.

According to a sixth aspect of the present invention, the net lid is constantly urged in the opening direction of the upper opening, and the timed drive mechanism has a cord linked to the net lid so as to open and close the net lid. A load portion connected to the end of the cord and a timer for starting the load on the load portion in a timed manner are provided. If the load section is simply a container, the device cost can be kept extremely low. The load part may simply be supported so as to be vertically movable.

In the present invention, a lateral opening configured to be openable and closable is provided at an arbitrary position of the outer wall net portion. Larger fish can be captured at the same time by opening the horizontal opening as well as the upper opening of the stepped recess. In addition, the yield of target fish is higher when only one of them is used open.

In the eighth aspect, a shape-retaining member is provided at each corner in order to maintain the shape of the net body in the sea. The donut-shaped or hollow bag-shaped shape of the net body in the sea is maintained to ensure the entrance of the captured fish into the net body.

According to a ninth aspect of the present invention, there is provided a floating support body installed on the surface of the sea, and a net body supported by the floating support body and having a lower portion arranged in the sea. The outer wall net portion and the outer wall net portion are connected to the outer wall net portion, are arranged upward from the lower end side of the outer wall net portion inside, and the lower end side is opened so as to form a stepped recess inside. At the same time, it has an inner wall net portion having an upper opening on the upper end side, and these outer wall net portion and inner wall net portion partition the inside and the outside of the net body, and the upper opening of the stepped recess is inside and outside thereof. And a switchgear is provided in the upper opening,
In addition, a light source is arranged inside the net body, and the small fish and the like are captured inside the net body by the lighting effect at night, and at least these small fish and the like captured in the net body are administered to the squid larva after hatching. Including steps. With plankton, small fish with a body length of about 1 to 2 cm are effective for juveniles after hatching, can prevent cannibalism of squid that eats moving things, and cannibalism of hatched squid does not actively decrease, A large amount and high quality of edible squid will be surely grown and grown.

[0023]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 illustrate an embodiment of a net device for catching fish, etc. of the present invention. In FIG. 1, a floating support 10 is arranged on the sea surface S in a square shape in a plan view. A net body 12 is provided at 10 so that the lower portion is hung in the sea. The net device A for catching fish and the like includes a floating support 10 and a net body 12, and further includes an opening for communicating the inside and outside of the net body and a light source provided inside the net body.

The floating support 10 is formed, for example, by attaching and fixing a frame plate 16 to the upper portion of the float 14. In the embodiment, the floating support 10 has a square shape.
Hexagon, other polygons, circles, and other annular shapes may be used. As the float 14, a bale-shaped one in which a foam having a large buoyancy is packed is used. The floating support 10 may be any one capable of supporting the net body 12 in a floating state on the sea surface, other hollow closed tubular bodies or other hollow closed bodies, and any other structure having sufficient buoyancy. In the present invention, the above-mentioned net body is connected to the outer wall net portion that hangs downward in a ring shape and the outer wall net portion, and is arranged inside the outer wall net portion from the lower end side of the outer wall net portion toward the upper side. , An inner wall net portion having an opening on the lower end side so as to form a stepped recess inside and an upper opening on the upper end side. The outer wall net portion and the inner wall net portion partition the inside and the outside of the net body. And the upper opening of the stepped recess is used as a communication port between the inside and the outside, and an opening / closing device is provided in the upper opening.
One of the characteristic configurations is that the light source is arranged inside the net body.

The net body 12 has its upper end supported by the floating support body 10 and hangs in the sea in the shape of a hollow square tube to form a bottom portion. Further, in the central portion, the upper end does not project from the sea surface to the air. It is formed so as to rise upward in the sea to some extent and form a small inner peripheral cylinder with respect to the outer peripheral cylindrical shape. The upper surface of the outer peripheral cylinder is open to face the hollow, and the upper surface of the inner peripheral cylinder is open, but can be opened and closed by an opening / closing device as described later.

That is, the floating support body 10 is connected to the outer wall net portion 18 depending on the substantially outer peripheral shape of the floating support body, and the lower end of the outer wall net portion 18 depending on the shape of the floating support body 10. The inner wall net portion 20 is provided so as to rise upward from the central portion of the outer peripheral shape.

In the embodiment, a bottom wall net portion 22 is connected to the lower end of the outer wall net portion 18 in a substantially horizontal direction. The inner wall net portion 20 is arranged on the other end side of the bottom wall net portion 22 so as to rise substantially vertically. The outer wall net portion 18, the bottom wall net portion 22, and the inner wall net portion 20 are connected to each other in a substantially U-shape in a vertical cross section.

That is, as seen in FIG. 1, the inner wall net portion is connected to the lower end of the outer wall net portion 18 so as to rise in the direction of the sea surface S.
A stepped recess 24 is formed at the center of the outer peripheral shape of the floating support 10.
Are formed. The lower end side of the step recess 24 has a donut-shaped opening 25, which serves as a primary entry path for the fish into the step recess 24. The upper end of the inner wall net portion 20 is still under the sea, and an upper opening 26 is formed therein. Therefore, as a whole, the net body 12 partitions the net, that is, the inside and outside of the net, into a donut shape.
Various kinds of live fish will be captured in this donut-shaped sea space. In the embodiment, the size of the outer wall net portion 18 is set to be about 4 m × 4 m in length and width and about 3 m in depth.

Further, in this embodiment, for example, FIG.
A support plate 28 such as a scaffolding plate is mounted on the upper surface of the floating support 10 so as to pass through the center of the floating support 10 as shown in FIG. Then, the inner wall net portion 20 is supported by the support plate 28 with wires, ropes, or other ropes 30 in a suspended manner, and thereby the upper end of the inner wall net portion 20 is supported so as to be disposed at a required subsea position. The step recess 24 is formed and held.

Further, in this embodiment, the bottom wall net portion 22 is provided to connect the outer wall net portion 18 and the inner wall net portion 20. However, the bottom wall net portion 22 is not necessarily provided and the outer wall net portion 22 is not necessarily provided. The lower end of the inner wall net 20 may be directly connected to the lower end of the portion 18.

As described above, the upper opening 26 is provided above the step recess 24. And this upper opening 2
The inside and outside of the net body 12 are communicated with each other by 6. In the embodiment, the inner wall net portion 20 forming the stepped concave portion 24 in FIG. 3 is arranged in the shape of a hollow square tube so as to rise upward in the sea, and the upper end surface of the inner wall net portion 20 is opened at the center and closed by the nets on both sides. The wall 31 is provided in a stepped shape. Then, the upper opening 2 formed in the central portion of the both closing walls 31.
6 connects the inside and outside of the net body. The both closing walls 31 form a step further from the step recess 24, and have a structure that allows only smaller fish to pass, as will be described later.

An opening / closing device 32 is provided in this opening, and the opening / closing of the opening / closing device 32 connects and disconnects the inside and outside of the net body 12.

FIG. 3 is an enlarged schematic explanatory view of the opening / closing device 32. The upper opening 26 formed at the upper end of the square tubular inner wall net portion 20 is also formed in a quadrangular shape, and the center is on the opposite two sides thereof. In the portion, a mountain-shaped receiving wall 34 is formed so as to project upward so as to extend in the same plane as the inner wall net portion 20. Ring-shaped connecting portions 36 are fixed to the four corners of the upper end surface including the upper opening 26 in a part of the inner wall net portion 20.

On the other hand, the other two opposite sides different from the wall surface on which the mountain-shaped receiving wall 34 is formed are connected to the wall surface of the inner wall net portion 20 at a substantially right angle and one of the upper end surfaces of the inner wall net portion 20 is connected. A closing wall 31 for closing the part is provided on both sides except the central part. The above-mentioned upper opening 26 is formed in this central portion, and a net lid 38 is provided so as to connect to the net portion of the closing wall so that the opening 26 can be opened and closed.
The net lid 38 is formed by a U-shaped frame-shaped pipe member, and pins are projectingly provided at both ends thereof, and the pins are pivotally supported by a bearing portion 40 attached to an upper end edge of the inner wall net portion 20 to open and close the blade. A net cover 38 opens and closes the upper opening 26. This net lid 38 is formed in a rectangular shape,
The upper opening 26 is opened and closed in a double door shape while the fully closed position is regulated by the receiving wall 34. Then, the opening / closing operation can be smoothly performed by the receiving wall 34. That is, when the upper opening 26 is fully closed, both net lids 38 abut on the receiving wall 34 to close the upper opening 26 in a chevron shape. Good. Therefore, especially the net lid 38
Compared with opening and closing the upper opening 26 at a right angle, the device configuration for opening and closing can be simplified.

The closing wall 31 does not necessarily have to be provided.
The net lid may be pivotally attached directly to the side wall edge of the inner wall net portion to open and close the net lid in a double door shape. The two net lids 38 may not be attached in a double door shape, but one side may be connected in a hinge shape by the annular member 40 as shown in FIG. 4, and the upper opening 26 may be opened and closed in a single opening shape.

In this embodiment, the end portions of the connecting portion 36 and the net lid 38 described above are made of rubber, spring or other elastic member 4.
It is stretched by 2 and normally urged in a direction to open the upper opening 26, and the opening position is regulated at a required maximum opening position by a stopper (not shown). In the embodiment, the opening / closing device 32 includes a net lid 38 attached to the upper opening 26 so as to be openable and closable, and a time drive mechanism 44 for driving the opening and closing of the net lid 38 in a timed manner.

Further, the timed drive mechanism 44 has a rope 46 connected to the net lid 38 so as to open and close the net lid 38, and a load portion 48 connected to the other end of the rope. And a timer 50 for activating the load in a timed manner.

In FIG. 3, one end of a rope 46 such as a rope or a wire is fixed to the open / close end of the net lid 38a. The other end of the cord 46 is passed through the pipe frame of the other net lid 38b that faces it, turned around like a hook, and is attached to the floating support 10 as shown in FIG. Load part 4 which is vertically movable
It is fixed at 8. The load portion 48 is a container whose upper surface is opened in the embodiment. Then, a submersible pump 54 arranged in the sea extends a drainage hose 56 in this container, and arranges the hose port toward the inside of the container of the load unit 48. As a result, if the timer 50 is set to the required time, the submersible pump 54 is activated at that time to inject seawater into the container of the load section 48, causing a load to be constantly opened via the cord 46. Net lid 3 biased in the direction
Move 8 closed.

Further, a light source 58 is arranged inside the net body 12 and above the upper opening 26 on the upper end side of the inner wall net portion 20. In the embodiment, this light source 58 comprises a waterproof underwater light. The power of the submersible pump 54 and the light source 58 is normally the power supplied from the land by extending the power line cable, but it may be a power generation method such as solar power generation. Here, at night or the like, small fish or the like are brought to the light source 58 from the upper opening 26 and enter the light source 58 so that desired fish can be captured.

The time drive mechanism 44 does not necessarily have to be provided, and a rope or the like may be connected to the net lid 38 to manually pull up the inner wall net portion 20 at a desired time to obtain small fish or the like. good. Alternatively, the cord 46 may be linked to a motor (not shown) to drive the motor to open and close the net lid 38. Any other opening / closing mechanism may be provided.

The outer wall net portion 18, the inner wall net portion 20, the bottom wall net portion 22, the upper opening 26, the opening / closing device 32, the receiving wall 34, the net lid 38 and the like retain their net plate-like shapes. Therefore, the shape-retaining member 60 is arranged at each corner. In the embodiment, the shape-retaining member 60 includes the lower end of the inner wall net portion 20 and the connecting portion between the bottom wall net portion 22 and the inner wall net portion 20, the upper opening 26, the closing wall 31, the opening / closing device 32, the receiving wall 34, and the net lid 38. The portion that defines the contour outer shape of is formed from a stainless steel pipe member. Further, as the shape-retaining member that defines the contour shape of the lower end portion of the outer wall net portion 18, a rope 60a with a weight in which a weight is arranged is used. This may be achieved by simply disposing and fixing the weight on the lower end of the net or the like at an appropriate position. Therefore, the net portion is pulled down with a certain weight to form the outline shape of the entire net body in the sea. Not limited to the pipe member, rod-shaped metal, light metal, other plastic synthetic resin or any other material may be used, and as long as the shape can be retained in the sea, a dot-shaped weight to maintain the shape is used as a net. It may be attached to, placed in, or otherwise used.

Further, the net in the net body 12 is made of synthetic resin such as tetron for ordinary fish nets. The mesh ground of the net may be set to an arbitrary size corresponding to the size of the fish to be caught, but in the case where the stepped concave portion 24 is provided as in the present embodiment, it is cultivated. In many cases, the main purpose is to catch fish and other small live fish that serve as food. In this case, for example, 0.5 mm, 1 mm (220K), 2 mm
It has been confirmed experimentally that the maximum yield is obtained by using a fish net or the like of a mesh ground such as horns. The size of the mesh is not limited to this, for example, 0.4,
The size may be about 0.3, 0.2 mm, or 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 m.
m, 9 mm, 10 mm, or even 10 cm or more can be expected to capture to some extent. As in the embodiment, for example, a size of 1 mm square (220 K) low degree has a body length of 5, for example.
Small fish and other crustacean juveniles with a size of less than mm are suitable for capturing a large amount without weakening them. For larger fish, a net of mesh size corresponding to the larger mesh is used.

Next, the operation of the net device for catching fish according to the present invention will be described. In general, fish have a correction that they gather toward the light source when the surrounding environment is dark.
Even in the daytime when the entire area is bright, the efficiency is inferior even if this net device is used. Therefore, it is the nighttime when the power of the device 10 is exerted.

For example, when the timer 50 is set at 5 o'clock in the morning and the pump 54 is activated, various fish flock to the illumination of the light source 58 at night. In this case, as shown in FIG. 6, a relatively large fish such as a sea bream, yellowtail, yellowtail, mackerel, and mackerel draws a large circular orbit below the bottom wall net 22 as shown by u. However, it does not try to enter the stepped recess 24 formed in the shape of a chimney at the center. This is because these relatively large fish do not vigilantly enter a smaller space (sea space) where such a step is suddenly formed from a large space.

On the other hand, smaller fish that do not make the step recess 24 itself a narrow space easily enter the step recess 24. Then, in the step recess 24, the orbital migration of the small fish is further performed. Usually, within this inner wall net part 20, small horse mackerel within 10 cm to 20 cm,
Sardines, kibinago, side shrimp, chirimenjako, and other small fish have entered. And one of these small fish
Small fish with a size of 0 cm or more only draw a circular orbit and do not enter the inside N of the net. Here, for example, only small fish such as side shrimp of about 3 cm or less, chirimenjako, and sardine will enter the inside N of the net. And at 5 o'clock in the morning, timer 5
When the 0 switch is turned on and the submersible pump 54 is activated,
Seawater is pumped up and poured into the container as the loading unit 48. Then, the weight of the water of the load portion 48 applies a load, and one of the net lids 38 is pulled via the cords 46, thereby closing the net lid 38 and closing the upper opening 26. With this, the communication between the inside and outside of the net is blocked, and the small fish to be captured are captured inside the net N.

In the case of the embodiment, after this, the rope 30 is connected to a ship crane or the like, the support plate 28 is retracted from the central portion, and the crane is hoisted so that the lower end of the inner wall net portion 20 is substantially as shown in FIG. It is lifted and supported to the extent that it is located on the sea surface S, and in this state, it is sucked with a special pump that does not damage the fish used when moving live fish, or the live catch is collected with a bucket or other scooping equipment. It is a thing.

Although not shown, the inner wall net portion 20 communicates with the lower surface side in a donut shape inside the outer wall net portion 18 as described above, and the upper surface side can be opened and closed by the upper opening 26. Since the reference numeral 26 is required to be kept submerged in the sea at the time of use, the support plate 28 and the cord 30 are used to support this, but in the embodiment, the support plate is provided on the upper surface of the substantially central portion of the floating support 10. Since 28 is placed, it is often the case that the recovery work is hindered when the captured small fish is recovered, or it interferes with the other lifting work of the inner wall net portion 20. Therefore, for example, a frame-like support is formed on the floating support 10 by using a frame member, and the support is made to support the inner wall net portion 22 by using a pulley, an endless cord, or the like. The support plate 28 may be omitted so that it can be moved up and down easily.

Here, in particular, a small fish of several millimeters to 10 cm, which is indispensable for aquaculture of fish, can be produced with a simple structure at a low cost, and labor is hardly required for the operation, so that the labor cost is low. It is easy to manage, and it is possible to catch a large amount with certainty. Therefore, it is possible to stably perform the aquaculture process of the cultured fish using them. In particular, since the bait itself can be obtained in a living state, the quality of the cultured fish is extremely close to that of the natural one, and a high quality cultured fish can be grown. Also, there is no need to use bait for capture,
It is safe because there is no need to operate while pulling the net, and the power of the ship and the fuel used for it are also unnecessary.

As described above, the net device for catching fish etc.
Alternatively, in particular, small fish are caught by using a vigilance. For example, as shown in FIG. 8, in addition to the upper opening 26 of the inner wall net portion, a lateral wall is provided on any side wall of the outer wall net portion 18. The opening 62 may be provided, and the net lid 64 may be connected to a cord or the like to be opened and closed. Larger fish can also be caught with the net lid 64 open.

Next, a method for cultivating squid using the apparatus 10 as described above will be described. Squid is a small squid about 10 cm in size captured by an offshore net, and left in the squid net in the bay. There is a technique established to some extent to administer the squid and feed it to the aquaculture by feeding it to the squid, and the growing squid is being offered to the market. It is normal to catch 10 cm of fish, and therefore the squid caught for aquaculture has only escaped from the net, so it is not possible to secure a large quantity. However,
For squids that have grown to squid of about 10 cm, it is relatively easy to administer small fish of similar size that are easy to catch in order to grow and cultivate them as adult squid without inconvenience. You can do it.

On the other hand, attempts to grow artificially by culturing until it grows to the size of a squid have been made all over the country, but artificial plankton to be used as feed are expensive, and plankton cannibalize. The fact is that it has not been put to practical use because it has a strong habit of eating the bait that the intense squid moves.

The result of the applicant's research is that the behavior of the squid was carefully analyzed. In the present invention, the net device for catching fish etc. is used as it is. That is, the floating support 10 installed on the sea surface S in a polygonal shape or an annular shape, and a net body 12 supported by the floating support 10 and having a lower portion placed in the sea,
The net body 12 is connected to the outer wall net portion 18 that hangs in the sea corresponding to the substantially outer peripheral shape of the floating support body 10 and the lower end of the outer wall net portion 18, and the floating support body 10 is connected.
With respect to the outer peripheral shape of the inner wall net portion 20 which is formed on the inner side with respect to the outer peripheral shape of the inner wall net 20 and which is provided with an upper opening 26 in the upper portion and is arranged to stand up in the sea surface direction. Divides the inside N and the outside of the net body 12 by using the upper opening 26 of the stepped recess 24 as a communication port between the inside N and the outside, and an opening / closing device 32 is provided in the upper opening 26, and the net is formed. Body 1
A light source 58 is arranged in the inside N of 2 and a small fish or the like F is captured inside the net body 12 by the illumination effect at night. The small fish caught in these net bodies 12 are those in which at least the small fish caught in these net bodies 12 are administered to the squid larvae after hatching.

In the examples, for example, when the tips of pine or cedar are placed in the sea near the sea surface in the cultured squid net set in the bay of the sea area, and the adult squid laid therein is left unattended. The squid lays eggs on the tips of the cedar and pine trees. After a few days, these eggs hatch naturally and numerous squid larvae emerge. Approximately two months after hatching, in order to administer plankton, or to collect plankton, an underwater lamp is installed in the cultured squid net at night to illuminate. And what is most needed is to administer the live small fish caught by the above-mentioned method to this squid juvenile. Net mesh ground is from a few millimeters to 1, 2
Usually, small fish up to the size of about 1 cm are caught by such a method, such as shrimps with a length of about 1 to 2 cm, chirimenjako, urume sardine, etc. These are squid after hatching. By administering to juveniles,
It can be grown as an edible squid of extremely high quality in terms of quality while effectively preventing cannibalism.

Experimentally, it is possible to surely grow a large amount of squid with almost no decrease by administering small fish caught by these methods up to about two months every day, every other day, or even irregularly. Have been confirmed. Then, after two months, the body length reaches about 10 cm. After that, as is well known, a small fish of about the same size that can be obtained in a relatively large amount and at a low price in a large net, etc., is put into this cultured squid net, and these small fish eat. By appropriately administering fish meal or the like as a bait, the squid will naturally grow and grow to, for example, about 1 kg, and can be provided as a food product on the market. This ensures that a large amount of high quality squid can be cultivated.

The net device for catching fish and the like according to the present invention and the method for cultivating squid using the net device are not limited to the configurations of the above-mentioned embodiments, and the inventions described in the claims are not limited to these. Any modification may be made without departing from the essence.

[0056]

As described above, according to the net device for catching fish and the like according to claim 1, a floating support provided in a polygonal shape or an annular shape on the sea surface, and supported by this floating support, A net body having a lower portion arranged in the sea, the net body being connected to the outer wall net portion depending on the substantially outer peripheral shape of the floating support body in the sea and the lower end of the outer wall net portion. A stepped recess is formed on the inner side with respect to the outer peripheral shape of the floating support, and an inner wall net part is provided upright in the sea surface direction while having an opening at the top,
The outer wall net portion and the inner wall net portion partition the inside and the outside of the net body, and the opening of the stepped concave portion serves as a communication port between the inside and the outside, and an opening and closing device is provided in the opening, and the net is provided. Since the light source is placed inside the body, it is possible to produce small fish in a living state of several millimeters to 10 cm, which is indispensable for aquaculture such as fish, with a simple structure and at low cost, and most labor is required for operation. Labor costs are low and unnecessary, and management is easy. Several millimeters to 10 cm, which are indispensable for aquaculture of fish.
It is possible to reliably and in large quantity capture small fish in the living state before and after, so that the aquaculture process of cultured fish using them can be performed stably. Further, it is safe because it does not require operation while pulling the net, and the power of the ship and the fuel used for it are also unnecessary, and the overall running cost can be kept extremely low.

Further, according to the net device for catching fish etc. of claim 2, since the floating support is formed in a polygonal shape or an annular shape, an outer wall net portion corresponding to the outer peripheral shape of the floating support is provided. Since it can be hung, it is easy to maintain the shape of the net body in the sea, and it is efficient to attach and fasten the net body to the floating support,
And it can be done easily and in a short time.

According to the net device for catching fish and the like of claim 3, the outer wall net portion is hung substantially vertically, and is connected to the lower end of the outer wall net portion so as to be substantially horizontal in the bottom wall net portion. Is connected to one end of the bottom wall net portion, and the inner wall net portion is connected to the other end side of the bottom wall net portion in a substantially vertical direction so as to stand upright. The outer wall net portion, the bottom wall net portion, and the inner wall net portion have a substantially sectional shape. Since it is connected in a U-shape, a donut-shaped structure with an opening on the lower surface and an opening on the upper surface can be realized, and the net device for catching fish etc. by a net device such as a fish net can be implemented. You can

Further, according to the net device for catching fish etc. according to claim 4, since the opening / closing device for the opening of the stepped recess includes the net lid which is openably / closably attached to the opening, the inner wall The opening and closing of the opening of the net can be effectively performed, and communication between the inside and outside of the net can be blocked with a simple structure, effectively, and smoothly.

According to another aspect of the present invention, in the net device for catching fish, etc., the opening / closing device is a net lid attached to the opening so as to be openable / closable, and a timed drive for driving the opening / closing of the net lid in a timed manner. Since it has a mechanism, the area around the net becomes brighter at dawn and the fish escape from the net body, or the opening of the stepped recess is closed before the fish leave the net body, and small fish in a living state can be reliably captured in the net body.

Further, according to the net device for catching fish and the like according to claim 6, the net lid is constantly biased in the opening direction of the opening, and the timed drive mechanism opens and closes the net lid. In order to obtain the rope, the rope connected to the rope, the load portion connected to the end of the rope, and the timer for starting the load to the load portion in a timed manner are provided. It has the effect of effectively opening and closing.

According to the net device for catching fish and the like according to the seventh aspect, since a lateral opening configured to be openable and closable is provided at an arbitrary position of the outer wall net portion, other than small fish. It is also possible to capture relatively large fish at the same time, and it can be used separately for small fish or for exclusive use.

Further, according to the net device for catching fish etc. according to the eighth aspect, since the shape retaining member is provided at each corner in order to maintain the shape of the net body in the sea, the ocean current The shape of the net body can be maintained in the sea against the influence of tides and tidal currents, and the compartments inside and outside the net can be reliably formed to ensure the ease of entry of small fish and the like.

Next, according to the method for cultivating squid using the net device for catching fish etc. according to claim 9, a floating support provided in a polygonal shape or an annular shape on the sea surface and a support for this floating support. And a net body having a lower portion arranged in the sea, and the net body has an outer wall net portion hung in the sea corresponding to the substantially outer peripheral shape of the floating support, and a lower end of the outer wall net portion. The inner wall net portion is connected and has an inner wall net portion that is formed inwardly with respect to the outer peripheral shape of the floating support body and is provided upright in the sea surface direction while having an opening in the upper portion, and these outer wall net portion and inner wall net portion are provided. Divides the inside and the outside of the net body by using the opening of the stepped recess as a communication port between the inside and the outside, and an opening and closing device is provided in the opening, and a light source is arranged inside the net body. Then
This is difficult because it involves a step of capturing small fish or the like inside the net body by this night illumination and administering at least these small fish or the like captured in the net body to the squid larvae after hatching. It is possible to surely perform growth aquaculture until it grows to a state of a squid with a size of about 10 cm without reducing cannibalism, and in particular, since the bait itself can be obtained in a living state, it is a live squid. The quality of squid is very close to that of natural ones, and it is possible to grow a large amount of good quality squid in a reliable manner.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional explanatory view of a net device for capturing fish etc. according to an embodiment of the present invention.

FIG. 2 is a schematic plan view thereof.

FIG. 3 is a schematic perspective explanatory view of an inner wall net portion.

FIG. 4 is a schematic explanatory view showing another embodiment of the net lid that opens and closes the opening in the inner wall net portion.

FIG. 5 is a schematic cross-sectional explanatory view showing the configuration of a net device for catching fish etc. including a time drive mechanism.

FIG. 6 is an operation explanatory view of a usage state of the net device for capturing fish etc. according to the embodiment.

FIG. 7 is a schematic explanatory view showing a state in which the inner wall net portion of the net device for capturing fish etc. according to the embodiment is lifted.

FIG. 8 is a schematic side view illustrating a state in which a lateral opening is provided on one of the side walls of the outer wall net portion.

FIG. 9 is a schematic cross-sectional explanatory view of the lateral opening as seen in a net cross-section.

[Explanation of symbols]

 10 floating support 12 net body 18 outer wall net portion 20 inner wall net portion 22 bottom wall net portion 24 step recess 26 opening 28 support plate 32 opening / closing device 38 net lid 44 timed drive mechanism 58 light source 60 shape retention member A for capturing fish etc. Net device S Sea surface N Inside net

Claims (9)

[Claims] 1. A floating support provided on the surface of the sea, and a net body supported by the floating support and having a lower portion placed in the sea. The net body has an annular outer wall net hanging downward. And a portion connected to the outer wall net portion and arranged upward from the lower end side of the outer wall net portion inside the outer wall net portion and opening the lower end side so as to form a stepped recess inside and the upper end. Has an inner wall net portion provided with an upper opening on the side, and the outer wall net portion and the inner wall net portion partition the inside and the outside of the net body, and the upper opening of the stepped recess communicates the inside and the outside. A net device for catching fish or the like, which has a mouth, a switch is provided at the upper opening, and a light source is arranged inside the net. 2. The net device for catching fish or the like according to claim 1, wherein the floating support is formed in a polygonal shape or an annular shape. 3. The outer wall net portion hangs in a substantially vertical direction, is connected to a lower end of the outer wall net portion, is connected to one end of the bottom wall net portion in a substantially horizontal direction, and is further connected to the other end of the bottom wall net portion. The said inner wall net part is connected to the side in a substantially vertical direction, and is arrange | positioned upright, and these outer wall net parts, a bottom wall net part, and an inner wall net part are connected in a substantially U-shaped cross-section. A net device for capturing fish, etc. 4. The opening / closing device for opening the upper part of the stepped recess is
The net device for catching fish or the like according to any one of claims 1 to 3, further comprising a net lid that is openably and closably attached to the upper opening. 5. The net for catching fish and the like according to claim 4, wherein the opening / closing device includes a net lid attached to the upper opening so as to be openable and closable, and a time drive mechanism for driving the opening and closing of the net lid in a timed manner. apparatus. 6. The net lid is constantly urged in the opening direction of the upper opening, and the timed drive mechanism connects a rope connected to the net lid so as to open and close the net lid, and the rope. 6. The net device for catching fish and the like according to claim 5, further comprising a load part connected to an end of the net and a timer for starting the load on the load part in a timed manner. 7. The net device for catching fish or the like according to claim 1, wherein a lateral opening configured to be openable and closable is provided at an arbitrary position of the outer wall net portion. 8. The net device for catching fish or the like according to claim 1, wherein a shape-retaining member is provided at each corner for maintaining the shape of the net body in the sea. 9. A floating support provided on the surface of the sea, and a net body supported by the floating support and having a lower portion arranged in the sea. This net body has an outer wall net that hangs annularly toward the lower portion. And a portion connected to the outer wall net portion and arranged upward from the lower end side of the outer wall net portion inside the outer wall net portion and opening the lower end side so as to form a stepped recess inside and the upper end. Has an inner wall net portion provided with an upper opening on the side, and the outer wall net portion and the inner wall net portion partition the inside and the outside of the net body, and the upper opening of the stepped recess communicates the inside and the outside. As a mouth, an opening and closing device is provided in the upper opening, and a light source is arranged inside the net body, and by this night illumination, small fish etc. are captured inside the net body, and the squid larvae after hatching are used. At least these Squid method aquaculture, characterized in that it comprises the step of administering a small fish or the like captured in the net body.