Marine life capture device

Abstract

To provide a marine organism capturing device capable of effectively preventing the escape of marine organisms that have entered inside. 【Solution means】The capturing device 1 includes a main body 2 having an inlet 2a formed on a side surface through which marine organisms can enter, and a plurality of elongated elastic members 4a, 4b provided on the main body 2 so as to overlap the inlet 2a of the main body 2, allowing marine organisms to enter the main body 2 from the inlet 2a, and an escape prevention means 4 for preventing the marine organisms that have entered the main body 2 from escaping from the inlet 2a.

Description

Technical Field

[0001] The present invention relates to a marine organism capture device.

Background Art

[0002] In recent years, attention has been focused on blue carbon, which is carbon taken up by the marine ecosystem for measures against global warming. Seaweed spreading on the seabed plays a major role in the production of blue carbon, but there are many areas where seaweed does not easily take root, and it is said that this is due to the barrenness of the shore caused by sea urchins eating up all the seaweed. At present, sea urchins are removed by diving work, but since it requires a large cost and labor, a method for efficiently removing sea urchins is desired. Therefore, it is conceivable to install a capture device for sea urchins on the seabed. For example, Patent Document 1 discloses a capture device in which two cages are arranged side by side vertically, and a drop opening that allows marine organisms to enter from 360° around is provided between the two cages.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the capture device of Patent Document 1, since the drop opening is simply an opening, there is a problem that sea urchins that have entered the inside can easily escape outside by climbing the wall surface after eating the bait. Such a problem exists not only when capturing sea urchins but also when capturing other marine organisms.

[0005] The present invention has been made based on such a background, and an object thereof is to provide a marine organism capture device capable of effectively preventing the escape of marine organisms that have entered the inside.

Means for Solving the Problems

[0006] In order to achieve the above object, the marine organism capture device according to the present invention is a main body having an inlet formed on a side surface through which marine organisms can enter, provided on the main body so as to overlap the inlet of the main body and escape prevention means that allows marine organisms to enter the main body from the inlet and prevents the marine organisms that have entered the main body from escaping from the inlet, and includes 、 the escape prevention means includes a plurality of first elongated elastic members supported above the inlet and extending downward and inward in the main body; and a plurality of second elongated elastic members supported below the inlet and extending upward and inward in the main body so as to intersect the first elongated elastic members this.

Advantages of the Invention

[0007] According to the present invention, it is possible to provide a marine organism capture device capable of effectively preventing the escape of marine organisms that have entered the inside.

Brief Description of the Drawings

[0008] [Fig. 1] It is a perspective view schematically showing the configuration of a marine organism capture device according to an embodiment of the present invention. [Fig. 2] It is a front view showing the configuration of a marine organism capture device according to an embodiment of the present invention. [Fig. 3] It is a plan view showing the configuration of a marine organism capture device according to an embodiment of the present invention. [Fig. 4] It is a bottom view showing the configuration of a marine organism capture device according to an embodiment of the present invention. [Fig. 5] (a) is an enlarged view showing the configuration of the escape prevention means in the marine organism capture device according to an embodiment of the present invention, and (b) is a cross-sectional view of the marine organism capture device of (a) cut along line A-A. [Fig. 6] (a) is a cross-sectional view showing an elongated elastic member supported at the left end of the inlet in the marine organism capture device of FIG. 5(b), and (b) is a cross-sectional view of the marine organism capture device of (a) cut along line B-B. [Fig. 7] (a) is a diagram showing how a marine organism enters the marine organism capture device according to an embodiment of the present invention, and (b) is a diagram showing how a marine organism attempts to escape from the marine organism capture device of (a). [Fig. 8] It is a perspective view showing the configuration of a marine organism capture device according to a modified example of the present invention. [Fig. 9] It is a diagram photographing the appearance of a prototype in an example. [Fig. 10] It is a diagram photographing the appearance of a sea urchin placed in an aquarium together with a prototype in an example.

Mode for Carrying Out the Invention

[0009] Hereinafter, a marine organism capture device according to an embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, the same or equivalent parts are denoted by the same reference numerals.

[0010] The marine organism capture device according to the embodiment is a device that is installed on the seabed, captures marine organisms that move on the seabed or in the sea, and prevents their subsequent escape. The marine organisms to be captured are any marine organisms, but in particular, organisms that move near the seabed, such as echinoderms such as sea urchins, starfish, and sea cucumbers. Hereinafter, with reference to FIGS. 1 to 6, the configuration of the marine organism capture device according to the embodiment will be described.

[0011] As shown in FIG. 1, the capture device 1 includes a main body 2 in which an inlet 2a through which a marine organism enters and an inlet through which a user inputs bait inside are formed, and seawater enters and exits the internal space, a lid 3 detachably attached to the main body 2 so as to cover the inlet, and an escape prevention means 4 provided on the main body 2 so as to cover the inlet 2a, which allows a marine organism to enter inside and prevents the marine organism that has entered inside from escaping. In FIG. 1, for ease of understanding, the configuration of the main body 2 is shown in a simplified manner.

[0012] As shown in FIG. 2, the main body 2 is formed in a cylindrical shape and forms a space for confining marine organisms inside. The main body 2 includes annular members 21 and 22 arranged opposite to each other vertically, a plurality of plate-like members 23 extending in the vertical direction, spaced apart from each other in the circumferential direction, and connecting the upper and lower annular members 21 and 22 to constitute a part of the outer surface of the main body 2, a plate-like member 24 disposed between the annular members 21 and 22, extending in the circumferential direction so as to intersect each plate-like member 23, and connecting each plate-like member 23, and four support columns 25 extending in the vertical direction inside the plate-like members 23 and 24 and supporting the annular members 21 and 22 respectively.

[0013] The annular members 21 and 22 and the respective plate-like members 23 and 24 constitute a frame for maintaining the shape of the main body 2. The annular members 21 and 22 and the respective plate-like members 23 and 24 are integrally formed using, for example, rivets. A rectangular opening 2b is formed between the annular members 21 and 22 and the plate-like members 23 and 24. A side net 26 is attached around the opening 2b of the main body 2.

[0014] The side net 26 is a net that allows seawater and air to pass through while preventing the passage of marine organisms. The side net 26 is formed of a net having meshes for preventing the passage of marine organisms, for example, a trical net. The trical net is a net with rectangular meshes (square meshes) and is manufactured, for example, by continuous extrusion molding using plastic as a raw material. The side net 26 is preferably fixed around the opening 2b using, for example, rivets.

[0015] The side net 26 may be attached to the frame constituted by the annular members 21 and 22 and the respective plate-like members 23 and 24 as a cylindrical net, or a rectangular net with curvature may be attached one by one around each opening 2b. An inlet 2a of the main body 2 is provided in the side net 26, and an escape prevention means 4 is fixed around the inlet 2a.

[0016] The inlet 2a is formed in a rectangular shape and is set to be longer in the circumferential direction than in the vertical direction of the main body 2. The circumferential length of the inlet 2a is preferably as long as possible within the range where the strength can be maintained so that the marine organisms climbing from below can be captured at any position in the circumferential direction of the main body 2. Further, the vertical length of the inlet 2a is preferably such that a marine organism moving from below, for example, a walkable marine organism such as a sea urchin, cannot move upward straddling the inlet 2a. The vertical length of the inlet 2a is, for example, within the range of 80 mm to 100 mm, and is 90 mm as an example. Note that the circumferential direction of the inlet 2a is an example of the left-right direction orthogonal to the vertical direction of the inlet 2a.

[0017] As shown in FIG. 3, an annular guide member 21a with which the lid 3 engages is provided on the upper surface portion of the annular member 21. The opening inside the guide member 21a is an inlet for feeding bait into the main body 2. Further, four pedestals 21b are provided on the upper surface portion of the annular member 21 at positions corresponding to the four support columns 25. Coaxial through holes are formed in the pedestals 21b and the main body of the annular member 21 below them. The same support column 25 is inserted through these through holes, and in that state, the support column 25 supports the main body and the pedestal 21b of the annular member 21.

[0018] A male thread is cut on the upper end side of the support column 25 and protrudes above the pedestal 21b. The male thread of the support column 25 is inserted through the through hole of the stopper 21c, and a nut 21d is attached from above it. The stopper 21c is a member that presses the lid 3 from above and is rotatably supported around the support column 25. When the lid 3 is attached to the annular member 21, the stopper 21c is brought into contact from above the lid 3, and the nut 21d is tightened on the male thread from above the stopper 21c, the lid 3 is fixed to the annular member 21.

[0019] The lid 3 includes a ring-shaped main body 31, a disk net 32 provided inside the main body 31, and a cylindrical net 33 supported on the bottom surface portion of the disk net 32 and engaging with the tip of the bait storage cylinder 5 extending upward. Both the disk net 32 and the cylindrical net 33 are formed of the same or equivalent material as the side net 26 and are welded to each other.

[0020] As shown in Fig. 4, an annular guide member 22a protruding downward is provided on the annular member 22. The annular guide member 22a includes a disk net 27 provided at its inner opening, and a cylindrical net 28 supported on the bottom surface portion of the disk net 27 and extending upward. Both the disk net 27 and the cylindrical net 28 are formed of the same or equivalent material as the side net 26 and are welded to each other.

[0021] Returning to Fig. 2, a cylindrical bait container 5 is detachably attached to the cylindrical net 28. The bait container 5 extends in the vertical direction toward the annular member 21 when attached to the cylindrical net 28, and is also attached to the cylindrical net 33 of the lid 3 so as to sandwich and support the bait container 5 together with the cylindrical net 28 from above and below. The cylindrical net 28 of the main body 2 and the cylindrical net 33 of the lid 3 form a space for accommodating bait that attracts marine organisms together with the bait container 5.

[0022] The bait container 5 contains bait that attracts the marine organisms to be captured. For example, if the target to be captured is a sea urchin, kelp is contained. The bait container 5 is formed with an opening that allows at least the odor component of the bait to flow out to the outside, and an opening that allows the tentacles of a sea urchin to enter but does not allow the sea urchin to enter if the target to be captured is a sea urchin. The bait container 5 is preferably formed of the same or equivalent material as the side net 26, for example. This can prevent the bait from being eaten up by the previously entered marine organisms compared to the case of directly spreading the bait into the main body 2.

[0023] Returning to Fig. 1, the escape prevention means 4 is a means that allows the entry of marine organisms into the inside of the main body 2 and prevents the escape of the marine organisms that have entered the inside. The escape prevention means 4 includes a plurality of elongated elastic members 4a supported above the inlet 2a and extending downward and inward in the main body 2, and a plurality of elongated elastic members 4b supported below the inlet 2a and extending upward and inward in the main body 2. The elongated elastic members 4a and 4b are examples of a first elongated elastic member and a second elongated elastic member, respectively.

[0024] Each of the elongated elastic members 4a and 4b has the same or equivalent configuration, deforms so as to spread in the vertical direction of the main body 2, and allows marine organisms to enter into the main body 2. Further, the pair of the elongated elastic members 4a and 4b forms a recess for receiving marine organisms at the inlet 2a, and walkable marine organisms such as sea urchins and starfishes climbing from the seabed are guided to the recess. Since many marine organisms prefer to hide in the shade, the presence of such a recess can also attract marine organisms to the inlet 2a.

[0025] As shown in FIG. 5, the elongated elastic members 4a and 4b are alternately arranged in the circumferential direction (left - right direction) of the inlet 2a, and are arranged at equal intervals in the circumferential direction of the inlet 2a respectively. The elongated elastic members 4a and 4b are both elongated plate - like members that are more likely to deform in the thickness direction than in the width direction. The elongated elastic members 4a and 4b are formed, for example, with a rectangular cross - section and a width larger than the thickness, and are arranged at the upper and lower ends of the inlet 2a such that their width directions face the circumferential direction of the inlet 2a. The width of the elongated elastic members 4a and 4b is, for example, in the range of 4 mm to 5 mm, and the thickness is, for example, in the range of 0.5 mm to 1 mm. As the elongated elastic members 4a and 4b, for example, plastic binding bands are used. The root side of the binding band is fastened and attached to the wire forming the mesh of the side net 26.

[0026] The lengths of the elongated elastic members 4a and 4b are preferably set such that the tips are located below the lower end of the inlet 2a and above the upper end of the inlet 2a respectively. The lengths of the elongated elastic members 4a and 4b are, for example, in the range of 150 to 250 mm. Further, the tip portions of the elongated elastic members 4a and 4b preferably contact the circumferential surface of the bait storage cylinder 5. When a walkable marine organism such as a sea urchin enters from the inlet 2a of the main body 2, if the tip portions of the elongated elastic members 4a and 4b do not contact anywhere, it may turn back to the base end side. However, if the tip portions of the elongated elastic members 4a and 4b contact the circumferential surface of the bait storage cylinder 5, it is for the purpose of moving onto the circumferential surface of the bait storage cylinder 5 as it is.

[0027] Each of the elongated elastic members 4a and 4b is inclined obliquely downward and obliquely upward with respect to the side net 26, and is arranged so as to intersect each other. It is preferable that the elongated elastic members 4a and 4b intersect in the middle region in the longitudinal direction of each. Each of the elongated elastic members 4a and 4b is inclined at an angle of 40° to 45° with respect to the cross section of the main body 2, and it is preferable that the angle formed by the adjacent elongated elastic members 4a and 4b is within the range of 80° to 90°.

[0028] In the escape prevention means 4, since the elongated elastic members 4a and 4b are arranged such that their width directions are aligned on the same plane, even if the elongated elastic members 4a and 4b are deformed in the thickness direction by marine organisms, they are less likely to be deformed in the width direction. Further, since the elongated elastic members 4a and 4b intersect each other, even if the elongated elastic members 4a and 4b attempt to be deformed in the width direction, as long as the adjacent elongated elastic members 4a and 4b are engaged with each other, the deformation in the width direction is suppressed. Thereby, when a marine organism attempts to escape, it is possible to prevent a large gap from being generated in the left - right direction between the elongated elastic members 4a and 4b.

[0029] As shown in FIG. 6, the escape prevention means 4 is further provided with a plurality of elongated elastic members 4c that are respectively supported at the left end and the right end of the inlet 2a, extend inwardly in the main body 2, and cover the gap between the inlet 2a and the elongated elastic members 4a and 4b. The set of the plurality of elongated elastic members 4c is an example of cover means for covering the gap between the inlet 2a and the elongated elastic members 4a and 4b.

[0030] The elongated elastic members 4c are arranged side by side at equal intervals in the vertical direction of the main body 2 as shown in FIG. 6(a) at the left end and the right end of the inlet 2a, and are inclined so that the tip portions approach each other as shown in FIG. 6(b). Note that FIG. 6(b) is a cross - sectional view of the capture device 1 in FIG. 6(a) cut along the line B - B. As the elongated elastic members 4c, the same or equivalent configuration as that of each of the elongated elastic members 4a and 4b, for example, a plastic binding band, is used. The base side thereof is fastened and attached to the wire forming the mesh of the side net 26.

[0031] To explain the role of the elongated elastic member 4c in more detail, since the elongated elastic members 4a and 4b are arranged so as to form a recess inside the inlet 2a, at the left and right ends of the inlet 2a, when observed from the left-right direction of the inlet 2a as shown in Fig. 6(a), there is a triangular gap G between the inlet 2a and the elongated elastic members 4a and 4b. Since the elongated elastic member 4c is arranged to cover the triangular gap G, it is possible to prevent marine organisms from escaping through the triangular gap G.

[0032] Each elongated elastic member 4c is arranged such that its width direction faces the up-down direction of the main body 2. For this reason, when a marine organism tries to enter the inlet 2a, the elongated elastic member 4c curves in the thickness direction so as to fall toward the radial direction of the main body 2, allowing the marine organism to easily enter the inside of the inlet 2a. On the other hand, when a marine organism tries to escape from the inlet 2a, the elongated elastic member 4c curves in the thickness direction so as to fall toward the circumferential direction of the main body 2, preventing the marine organism from escaping from the inlet 2a. The above is the configuration of the capture device 1.

[0033] Next, the flow of the marine organism capture method using the capture device 1 according to the embodiment will be described. Hereinafter, the case of capturing sea urchins as the marine organisms to be captured will be described as an example.

[0034] First, remove the lid 3 from the main body 2, store pieces of kelp as bait inside the bait storage cylinder 5, and close the lid 3 again. At this time, the lid 3 is fixed to the main body 2 using the stopper 21c and the nut 21d. Next, sink the capture device 1 into the sea and install it on the seabed. The capture device 1 is installed in the sea area where the target sea urchins inhabit. When sinking the capture device 1 into the sea, seawater flows in from the side net 26 and the disk net 27 of the capture device 1, and the air inside the main body 2 escapes upward from the disk net 32 of the lid 3, so the capture device 1 can be easily sunk into the sea.

[0035] After the capture device 1 is installed on the seabed, after a while, sea urchins that have sensed the odor component of kelp approach the capture device 1 and attempt to enter the inside of the capture device 1. At this time, since sea urchins prefer thin and dark places and have the property of entering concave areas, they are prompted to move to the recess formed by the escape prevention means 4 provided at the inlet 2a. As shown in Fig. 7(a), each elongated elastic member 4a, 4b is curved in the thickness direction so as to fall toward the inside of the main body 2, and the vertical interval between the elongated elastic members 4a, 4b widens. Also, since the lower elongated elastic member 4b bends under the weight of the sea urchin, the engagement between the adjacent elongated elastic members 4a and 4b is disengaged, and the lateral gap between the two widens, causing the sea urchin to fall into the main body 2. As a result, marine organisms can easily enter the inside of the inlet 2a.

[0036] After that, when the sea urchin that has eaten the bait tries to escape from the inside of the main body 2 and presses its body against each elongated elastic member 4a, 4b, as shown in Fig. 7(b), each elongated elastic member 4a, 4b deforms so that they all face in the opposite direction to the substantially vertical direction, and thus repel the marine organism so as to push it back inside. Since the elongated elastic members 4a, 4b are alternately arranged and restrict the lateral deformation of the adjacent elongated elastic members 4a, 4b, the lateral gap between the elongated elastic members 4a, 4b also does not open. Therefore, even if the sea urchin inside the main body 2 tries to shrink its body vertically and horizontally to widen the gap between the elongated elastic members 4a, 4b and sneak in, it cannot widen the gap and escape.

[0037] Also, as shown in Fig. 6(a), the triangular gaps G existing between the left and right ends of the inlet 2a and the elongated elastic members 4a, 4b are covered by a plurality of elongated elastic members 4c. Therefore, the sea urchin inside the main body 2 cannot escape from the left and right ends of the inlet 2a either.

[0038] With the capture device 1, sea urchins can be confined for a long time by the above mechanism. The captured device 1 with sea urchins thus captured may be lifted from the sea at a desired timing. After lifting, the lid 3 may be removed from the annular member 21, and the sea urchins may be taken out through the inlet. At this time, if the bait storage cylinder 5 is removed from the cylindrical net 28, it becomes easier to put a hand into the main body 2, and thus it becomes easier to take out the sea urchins.

[0039] Note that the captured sea urchins may be discarded or shipped to the market. However, since they grow on the seabed where sea burning has occurred, their quality is poor and they cannot be shipped to the market as they are. Therefore, it is advisable to put bait into the water tank containing the captured sea urchins and raise them in captivity. The above is the flow of the marine organism capture method.

[0040] As described above, the capture device 1 according to the embodiment includes a main body 2 having an inlet 2a on a side surface through which a marine organism can enter, and a plurality of elongated elastic members 4a, 4b provided on the main body 2 so as to overlap the inlet 2a of the main body 2, allowing the marine organism to enter the main body 2 from the inlet 2a and preventing the marine organism that has entered the main body 2 from escaping from the inlet 2a. Escape prevention means 4. Therefore, it is possible to effectively prevent the marine organisms that have entered the capture device 1 from escaping.

[0041] The present invention is not limited to the above embodiment, and the following modifications are also possible.

[0042] (Modification example) In the above embodiment, the main body 2 has a cylindrical shape, but the present invention is not limited to this. For example, the main body 2 may have a cubic shape or a spherical shape, or other shapes.

[0043] In the above embodiment, the strength of the main body 2 is maintained by a plurality of support columns 25, but the present invention is not limited to this. If the necessary strength can be ensured by the upper and lower annular members 21, 22 and the plate-like members 23, 24, part or all of the support columns 25 may be omitted, and if strength is required, the number of support columns 25 may be five or more.

[0044] In the above-described embodiment, the side net 26 was supported by the frame composed of the upper and lower annular members 21 and 22 and the plate-like members 23 and 24. However, the present invention is not limited to this. For example, if there is no problem with strength and rigidity even when a cage is configured with a net such as a trical net, the frame may be omitted.

[0045] In the above-described embodiment, kelp was stored in the bait storage cylinder 5. However, the present invention is not limited to this. For example, the bait storage cylinder 5 and the cylindrical nets 28 and 33 may be omitted, and kelp may be directly sprayed into the main body 2. In this aspect, the sea urchins that entered first eat the kombu, and the odor components generated from the crushed kombu float around, and an effect of attracting new sea urchins can be expected.

[0046] In the above-described embodiment, the lid 3 was detachably provided with respect to the annular member 21. However, the present invention is not limited to this. The lid 3 may be omitted, and a disk net may be attached to the inlet inside the guide member 21a of the annular member 21, and the annular member 21 may be configured to be detachable with respect to the plate-like member 23 and the support column 25.

[0047] In the above-described embodiment, binding bands were used as the elongated elastic members 4a, 4b, and 4c. However, the present invention is not limited to this. For example, a member in which a plurality of elastically deformable plate-like members are arranged like comb teeth may be used as a set of the elongated elastic members 4a, 4b, and 4c.

[0048] In the above-described embodiment, the elongated elastic members 4a, 4b, and 4c were formed of elongated plate-like members that are more easily deformed in the thickness direction than in the width direction. However, the present invention is not limited to this. For example, the elongated elastic members 4a, 4b, and 4c may be elongated members having a circular cross section.

[0049] In the above-described embodiment, the respective elongated elastic members 4a and 4b were arranged so as to intersect each other in the middle region of their lengths. However, the present invention is not limited to this. For example, the respective elongated elastic members 4a and 4b may be arranged so as to intersect at their tip portions.

[0050] In the above-described embodiment, the elongated elastic members 4a and 4b were arranged alternately with each other, but the present invention is not limited to this. For example, a plurality of one of the elongated elastic members 4a and 4b may be arranged, and then a plurality of the other of the elongated elastic members 4a and 4b may be arranged subsequently.

[0051] In the above-described embodiment, in order to cover the gap G between the inlet 2a and the elongated elastic members 4a and 4b, the elongated elastic members 4c were also provided at the left end and the right end of the inlet 2a, but the present invention is not limited to this. As the covering means, for example, plate-shaped cover members extending inwardly may be provided at the left end and the right end of the inlet 2a, and the gap G between the inlet 2a and the elongated elastic members 4a and 4b may be covered by the cover members.

[0052] In the above-described embodiment, the plurality of inlets 2a were arranged side by side on the same circumference, but the present invention is not limited to this. The plurality of inlets 2a may be arranged in a plurality of rows on different circumferences so that a marine organism passes through any one of the inlets 2a when climbing from the bottom to the top.

[0053] For example, as shown in FIG. 8, the plurality of inlets 2a may be arranged in two rows on different circumferences in the vertical direction, and the inlets 2a in the first row and the inlets 2a in the second row may be shifted from each other in the circumferential direction. If three inlets 2a are provided in each row, the inlets 2a in the first row and the inlets 2a in the second row may be shifted by 60° in the circumferential direction. If four inlets 2a are provided in each row, the inlets 2a in the first row and the inlets 2a in the second row may be shifted by 45° in the circumferential direction.

[0054] Hereinafter, the present invention will be specifically described with reference to examples. However, the present invention is not limited to these examples.

[0055] (Example) In the embodiment, a prototype machine for sea urchin capture was created to verify whether sea urchins can be captured in the sea. In the prototype machine, as shown in FIG. 9, a cage with a circular cross-section was constructed using a trical net, and a cylindrical bait container was provided inside the cage. An entrance was provided on the side surface of the cage, and a plurality of binding bands were attached to the upper and lower ends of the entrance so as to be arranged alternately. Also, binding bands were arranged and attached to the left and right ends of the entrance.

[0056] Next, kelp was put into the bait container of the created prototype machine, and it was submerged in a water tank filled with seawater, and six sea urchins were put into the water tank. Then, it was observed for one week whether the six sea urchins entered the cage of the prototype machine and whether the sea urchins could be held as they were if they entered.

[0057] As a result, as shown in FIG. 10, a plurality of sea urchins pushed aside the binding bands and entered the inside from the entrance. At the time of taking the picture of FIG. 10, three sea urchins were captured in the cage, one sea urchin was entering (the arrow at the lower right of FIG. 10), and two sea urchins were outside the cage. When each sea urchin entered the cage, the lower binding band bent under the weight of the sea urchin, and the gap between the upper and lower binding bands widened in the circumferential direction, and the sea urchin fell into the cage through this gap. On the other hand, among the individuals trying to escape from the cage, there were those that tried to hide by straddling the binding band and shrinking their bodies vertically, but even when pushing the binding band from the inside, the gap between the upper and lower binding bands did not widen in the circumferential direction, and the escape of the sea urchin could be effectively prevented. As a result of repeating the same experiment, there was also a case where rarely one out of six sea urchins escaped, but in most cases, no sea urchin could escape.

[0058] The above-described embodiments are examples, and the present invention is not limited to these, and various embodiments are possible without departing from the gist of the invention described in the claims. The constituent elements described in the embodiments and modification examples can be freely combined. Also, inventions equivalent to the invention described in the claims are also included in the present invention.

Explanation of Signs

[0059] 1 Capture device 2 Main body 2a Inlet 3 Lid 4 Escape prevention means 4a, 4b, 4c Elongated elastic members 5 Bait storage cylinder

Claims

1. A main body having an entrance formed on a side portion through which marine organisms can enter; an escape prevention means provided on the main body so as to overlap the entrance of the main body, for allowing marine organisms to enter the main body through the entrance and for preventing the marine organisms that have entered the main body from escaping through the entrance; Equipped with The escape prevention means is a first plurality of elongated resilient members supported above the access opening and extending downwardly and inwardly within the body; a plurality of second elongated resilient members supported beneath the entrance and extending upwardly and inwardly within the body to intersect with the first elongated resilient members; Marine life capture equipment.

2. The first elongated elastic members and the second elongated elastic members are arranged alternately in the left-right direction of the entrance.

2. The marine organism capturing tool according to claim 1.

3. The first elongated elastic member and the second elongated elastic member are elongated plate-like members that are more easily deformed in a thickness direction than in a width direction, and are arranged such that the width directions of the first elongated elastic member and the second elongated elastic member are aligned in a left-right direction of the entrance.

3. A marine organism capturing tool according to claim 1 or 2.

4. the first elongated elastic member and the second elongated elastic member are arranged to cross each other at a mid-length region thereof; 3. A marine organism capturing tool according to claim 1 or 2.

5. the escape prevention means further includes cover means supported at the left and right ends of the inlet, extending inwardly within the body, and covering gaps existing between the inlet and the first and second elongated elastic members; 3. A marine organism capturing tool according to claim 1 or 2.

6. A food storage tube is provided in the main body and has an opening through which odor components can flow out from the stored food. An inlet through which food can be put into the food storage cylinder is provided on the upper surface of the main body, and a lid is attached to the inlet in a removable manner.

3. A marine organism capturing tool according to claim 1 or 2.

7. The tip ends of the first elongated elastic member and the second elongated elastic member are in contact with the food container.

7. The marine organism capturing tool according to claim 6.

8. The body is at least partially formed of triaxial net; The first elongated elastic member and the second elongated elastic member are binding bands fastened to wires constituting the mesh of the tri-layer net.

3. A marine organism capturing tool according to claim 1 or 2.

Images