JP3149422U - Young shellfish reef - Google Patents

Abstract

[PROBLEMS] To reduce the mass mortality of released larvae at the beginning of the release, make feeding work during the childcare period very simple and efficient, and make the larvae naturally accustomed to the growth environment. An artificial reef or reef structure that can be used is provided. SOLUTION: A reef body 4 for raising juvenile shellfish and a net member 16 covering the reef body 4, and the net member 16 feeds the bait into the reef body 4 from outside the net member 16. A charging unit 18 is provided. Moreover, the reef body 4 is provided with a feeding part in which the food introduced from the food input part 18 accumulates, and a wall that surrounds the feeding part in a substantially annular shape. Moreover, the bait | feeding-in part 18 consists of the cylindrical feed cylinder 20 which stands up from the opening part provided in the net member 16, and an opening part edge part. The feeding unit may be provided with a habitat collector that can accommodate a large amount of juvenile shellfish. [Selection] Figure 2

Description

  The present invention relates to a reef for raising young shellfish such as abalone and turban shell.

  Abalone and turban shells release juvenile shellfish to prevent depletion of marine resources and secure a stable catch. Young oysters are cultivated for a period of time in a dedicated facility, and are grown to a certain size and released into the sea. With such a release, about 5,000 to 50,000 juveniles are released at a time.

  However, depending on where the juvenile shellfish are released, there may or may not be a place where the juvenile shellfish hide. In such a case, juveniles were eaten by octopus, crabs, lobsters, and other pests. In addition, juveniles grown in the facility grew in an environment free from harmful organisms, and thus have a characteristic of being defenseless against harmful organisms. Furthermore, since it was given food during the breeding period in the facility, it also has a feature that it does not know how to take food. For this reason, only about 1/3 of the released larvae remained, and there was a problem that initial wear was too large. In particular, young oysters such as abalone and turban shell also have a problem that the economic loss is too great because they are expensive.

  In response to such problems, Japanese Patent Application Laid-Open No. 2001-21778 and Japanese Utility Model Application Laid-Open No. 6-38511 describe inventions and devices related to artificial reefs and reef structures that are installed on the seabed and grow juveniles.

JP 2001- 211778 A Japanese Utility Model Publication No. 6-38511

  The artificial reefs or reef structures described above provide a place for the young shellfish to hide, and manual feeding is required until the young shellfish learns about the growth environment, harmful organisms, how to take food, etc. It is. However, there is a problem that this feeding operation is very difficult. When food is thrown into the artificial reef from the sea, the food is washed away by the ocean current. In addition, in order to approach the artificial reef and feed it, it is necessary to dive in the sea, which is very difficult.

  Therefore, artificial reef or reef structure that can greatly reduce the initial depletion of juvenile shellfish, perform feeding work during the nursery period very easily and efficiently, and make the juvenile shellfish accustomed to the growing environment in a natural state Body development was anxious.

  In order to solve the above-mentioned problems, a juvenile shellfish reef according to the present invention comprises a reef body for raising juvenile shellfish and a net member covering the reef body, and the net member feeds the reef body from outside the net member. It is characterized by having a bait throwing part for throwing in. In addition, the reef body includes a feeding unit in which the food input from the feed input unit accumulates, and a wall body that substantially surrounds the feeding unit in an annular shape. The nursery reef according to the present invention is designed to learn the habit of hiding himself during the day, appearing to eat food, and hiding himself again in the growth environment of juvenile shellfish. Moreover, by covering the reef body with a net, the invasion of harmful enemy organisms is prevented, and it is intended to prevent the juvenile shellfish from being eaten.

  Further, the wall body may be formed by arranging a plurality of reef blocks, and the reef block may have a structure including a cover member and a solid filling member filled in the cover member. The cover member may be a mesh bag or a mesh bag. Moreover, the solid filling member may be randomly filled in the cover member using a crushed material such as stone or concrete.

  In addition, the feeding unit may include a habitat collector that forms a place where the young shellfish hide. This habitat collector is provided with a substantially plate-shaped main body and legs that hold the main body, and there is a gap between the habitat collector installation location and the main body that allows the young shellfish to hide. It may be in the shape. In addition, the feeding unit may be provided with a culture tool for culturing algae for feeding larvae.

  Moreover, the structure which consists of an opening part provided in the net member and the cylindrical feed cylinder which stands | starts up from an edge part of an opening part may be sufficient as a bait | feeding part. A weight member may be attached to the feeding cylinder. Moreover, the feeding cylinder may be attachable to and detachable from the net member as the sea condition deteriorates such as a typhoon. Moreover, it is good for the feeding pipe | tube to be connected with the maritime buoy and the string member.

  Further, a float may be attached to the outer surface of the net member.

  The juvenile shellfish reef according to the present invention is composed of a reef body for raising juveniles and a net member covering the reef body, and the net member is for feeding bait to the reef body from outside the net member. Therefore, it is possible to prevent the entry of harmful organisms and to efficiently feed the reef body, and to greatly reduce the initial depletion of the released shellfish.

  In addition, the reef has a feeding part where the food fed from the feeding part is collected and a wall that surrounds the feeding part in a ring shape. You can learn the habit of catching food, and you can expect a high survival rate even if you go outside the reef.

  In addition, the wall body is formed by arranging a plurality of reef blocks, and the reef block includes a cover member and a solid filling member that fills the cover member. Therefore, the shape of the reef body can be arbitrarily selected according to the topography and environment of the seabed. It has a high convenience. Also, since the reef block is easy to mold, the construction and installation of the reef is very simple.

  Moreover, since a cover member is a net bag or a net basket, manufacture and conveyance are easy and it can contribute to reduction of manufacturing cost and installation cost. Further, since the cover member is net-like, movement and entry / exit of juvenile shellfish into the reef body are not hindered, and entry of harmful organisms can be prevented.

  Moreover, since the solid filling member is a crushed material such as stone or concrete, it can be procured in the vicinity of the place where the reef is installed, or the concrete waste can be reused, and the manufacturing cost of the reef block can be reduced. Further, since the solid filling member is randomly filled in the cover member, natural gaps and rock shades can be formed, and the juvenile shellfish can easily get used to the natural environment.

  In addition, the feeding section has a habitat collector to form a place where young larvae hide, so it is possible to accommodate a large amount of larvae in the reef, enabling efficient childcare. .

  In addition, the habitat collector is provided with a substantially plate-shaped main body part and a leg part for holding the main body part, and there is a gap between the inhabiting collector installation part and the main body part where the young shellfish can hide. Since it is provided, it is very easy to manufacture and install habitat collectors, the construction cost of the nursery reef can be reduced, and the installation of the nursery reef is facilitated.

  In addition, the feeding section is equipped with a culture tool for cultivating the algae for feeding the larvae, so as the algae grows, the feeding frequency can be reduced, making it easier to raise the larvae become. Furthermore, the young shellfish can learn the habit of preying on algae by itself, and can grow even when they go out of the nursery reef, so that a high survival rate can be expected.

  In addition, the bait throwing unit consists of an opening provided in the cover member and a cylindrical feeding tube that rises from the edge of the opening, so that bait can be thrown into the feeding unit from the sea, making feeding work extremely Easy to be. Furthermore, the feed introduced by the feeding tube is made to flow into the sea, and it is difficult for other organisms to eat, so that efficient feeding is possible.

  Moreover, since a weight member is attached to the feeding cylinder, it can be stored in a state in which the feeding cylinder is crushed at normal times, and entry of pests from the feeding cylinder can be prevented. Furthermore, since an anchor-like object can be attached near the upper part of the feeding cylinder and stored near the seabed, it is less likely to be affected by the ocean current, and the risk of damage to the nursery reef is reduced.

  Further, since the feeding tube can be attached to and detached from the cover member, even if the distance from the sea surface to the reef changes, it can be dealt with by simply replacing the feeding tube, which is very convenient.

  Further, since the feeding cylinder is connected to the sea buoy by a string member, the feeding cylinder can be pulled close to the sea surface by pulling the string member during feeding, which is very convenient. In addition, maritime buoys serve as landmarks for nursery reefs.

  In addition, since the float is attached to the outer surface of the net member, the net member can be levitated, preventing the net member from being located in the vicinity of the feeding portion, and preventing the young shellfish from being eaten by the hostile organisms. be able to.

It is explanatory drawing which shows one Embodiment of the juvenile shellfish reef which concerns on this invention. FIG. 2 is a side view of the juvenile shellfish reef shown in FIG. 1. It is the partial exploded view which showed one Embodiment inside a nursery reef. It is the partial exploded view which showed one Embodiment inside a nursery reef. It is the side view which showed the internal state of the nursery reef shown by FIG. It is explanatory drawing which shows the collector for inhabiting this invention. It is explanatory drawing which shows one Embodiment of the reef block which concerns on this invention. It is explanatory drawing which shows the shaping | molding process of a reef block. It is explanatory drawing which shows one Embodiment of the net member which concerns on this invention. FIG. 9 is a plan view of the net member shown in FIG. 8. FIG. 9 is a side view of the net member shown in FIG. 8. It is explanatory drawing which shows the feeding condition using the juvenile shellfish reef which concerns on this invention.

  The juvenile shellfish reef 2 according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of a juvenile shellfish reef 2 according to the present invention, and FIG. 2 is a side view of the juvenile shellfish reef 2 shown in FIG. 3 and 4 are partially exploded views showing the internal state of the juvenile shellfish reef 2 shown in FIG. 1, and FIG. 5 is a side view of the nursery reef 2 shown in FIG. . In addition, these figures are only for demonstrating this invention, and do not limit this invention at all.

  The juvenile shellfish nursery reef 2 according to the present invention is characterized by comprising a reef body 4 for raising the juvenile shellfish 24 and a net member 16 covering the reef body 4.

  The reef body 4 preferably has a structure including a feeding portion 6 in which bait charged from the outside of the reef body 4 accumulates and a wall body 8 surrounding the feeding portion 6 in a substantially annular shape. In other words, the place where predatory larvae prey is surrounded by walls to prevent the invasion of harmful organisms and to reduce initial depletion. In the reef body 4 shown in FIG. 3, the wall bodies 8 are arranged in a substantially annular shape, and a portion surrounded by the wall bodies 8 is used as a feeding unit 6. In FIG. 3, the seabed is the feeding unit 6, but some member for the feeding unit 6 may be provided in the reef body 4. At this time, the feeding unit 6 and the wall body 8 may be separable, or the feeding unit 6 and the wall body 8 may be integrated, and the form and structure of the reef body 4 is considered in consideration of the environment of the installation location, etc. What is necessary is just to set suitably. In FIG. 3, one feeding unit 6 is provided in the wall body 8, but a plurality of feeding units 6 may be provided in the wall body 8 by devising how to arrange the reef blocks 10. good.

  Moreover, as shown in FIG. 4 or FIG. 5, a habitat collector 30 that forms a place where the young shellfish 24 hides itself may be provided in the feeding unit 6. By installing this inhabiting collector 30, a large amount of juvenile shellfish can be accommodated in the reef body 4 and raised. In addition, during the day, the habitual collector 24 can hide in the inhabiting collector 30, come out on the surface of the inhabiting collector 30, eat food, and then instruct the inhabiting collector 30 to hide again. it can. As shown in FIG. 6, the shape of the inhabiting collector 30 includes a substantially plate-like main body portion 32 and a leg portion 34 that holds the main body portion 32. The shape of the inhabiting collector 30 is good as long as it can form a space where a gap is provided, but it may be a tower or box shape and can accommodate a large amount of larvae and hide the larvae 24. What is necessary is just to set suitably about a form. In addition, the material for the inhabiting collector 30 should be formed of a material that has a certain amount of weight and excellent corrosion resistance, and it is preferable to substitute a concrete board or the like, but other materials can also be used. is there.

  The wall body 8 may have any shape or structure as long as it can surround the feeding unit 6. The wall body 8 may be a single structure, or may be a structure in which a plurality of reef blocks 10 are arranged to form the wall body 8 as shown in FIGS. 3 and 4. Thereby, by changing the size, shape, arrangement, etc. of the reef blocks 10, the shape and size of the wall body 8, the shape and size of the feeding unit 6 can be arbitrarily changed, and in various conditions and environments The reef body 4 can be installed.

  Moreover, it is better that the wall body 8 has a portion where the juvenile shellfish 24 can hide. Thereby, it is possible to learn the habit of hiding themselves in the wall body 8 during the day, coming out to the feeding unit 6 to eat food, and hiding themselves in the wall body 8 again, and a high survival rate can be expected. Further, it is possible to go out of the reef body 4 through the wall body 8, and the fry 24 can be diffused out of the reef body 4 naturally. As a part where the juvenile 24 can hide, a hole or a gap may be artificially provided in the wall body 8, but as shown in FIG. 7, a rock formed by combining a plurality of stones and rocks. It may be shaded and may be set according to the structure and form of the wall body 8.

  The reef block 10 may have any shape and structure as long as it has an appropriate strength and can prevent the entry of harmful organisms. Further, it is better if the reef block 10 has a part where the juvenile 24 can hide itself. The reef block 10 may be a single structure, but as shown in FIG. 7, a gabion type structure in which a plurality of solid filling members 14 are filled in the cover member 12 may be used as the reef block 10. Since the gabion-shaped reef block 10 as shown in FIG. 7 can arbitrarily change and adjust the size of the cover member 12 and the amount of the solid filling member 14 to be filled, the shape and form of the reef block 10 Can be set freely and is very convenient. As the cover member 12, the juvenile shellfish 24 can easily enter and exit the reef block 10, and a net bag or a net cage is preferable. When a net bag or netting is used as the cover member 12, it is optimal to use a durable resin such as polyester or polyethylene. Further, special processing such as plating processing, rust prevention processing, and corrosion resistance processing may be performed. The size of the cover member 12 is preferably about 1 m × 2 m × 0.3 m, but should be appropriately set in consideration of conditions such as the type and shape of the solid filling member 14 and the shape and size of the wall body 8 to be installed. It ’s fine. Further, the size of the mesh of the net bag or net cage is preferably such that it does not inhibit the movement of the juvenile shells 24 and can prevent entry from harmful organisms. As a specific example, a size of about 5 cm × 5 cm is preferable, and a size of about 3 cm × 3 cm is even better. Moreover, as the solid filling member 14, it is preferable to use stones or rocks, but the same material as a concrete block such as concrete waste, a high specific gravity solid material generally used in fish reefs, algae reefs, etc. Things can be used. The solid filling member 14 may be filled randomly in the cover member 12, and a natural gap may be provided between the solid filling members 14. As a method for forming the reef block 10, as shown in FIG. 8, a) a plate mold is formed of a plywood board or the like, and a cover member 12 is laid therein. b) The solid filling member 14 is randomly filled in the cover member 12. c) Lift the cover member 12 with a crane and remove it from the plate mold. When the reef block 10 is formed in this way, the solid filling members 14 can be filled at random, and natural gaps can be formed between the solid filling members 14.

  Moreover, the net member 16 should just be able to prevent invasion of harmful organisms, and may have a shape covering the entire reef body 4 or a shape covering only the feeding section 6. Further, the mesh of the net member 16 is good enough to prevent the invasion of harmful organisms. As a specific example, the size is about 3 cm × 3 cm. The material of the net member 16 is preferably a resin such as polyester or polyethylene and having a breaking strength against about 100 kg. Further, the nursery reef 2 shown in FIG. 1 and FIG. 2 connects the net member 16 and the reef body 4 by tying them with a rope (not shown), but the reef body 4 or the reef block is connected to the net member 16. A connecting member or a connecting means for connecting to 10 may be provided. Moreover, as shown in FIGS. 9 to 11, a float may be attached to the outer surface of the net member 16. In the drawing, a plurality of small floats are arranged along the lines, but depending on the weight, shape, etc. of the net member 16, the type of float, the number of installations, installation locations, etc. may be set.

  Moreover, the net member 16 is provided with the bait | feeding-in part 18 for throwing in the bait into the reef body 4 from the net member 16 outside. As shown in FIG. 9, the bait throwing portion 18 preferably has a structure including an opening 22 provided in the net member 16 and a cylindrical feeding tube 20 rising from the edge of the opening 22. With this structure, as shown in FIG. 12, it is possible to draw the feeding cylinder 20 close to the sea surface and efficiently feed the reef body 4 from the ship. Moreover, although the net | network member 16 shown by FIG. 9 or FIG. 10 is provided with the bait | feeding-in part 18 only in one place, you may be provided in multiple places. For example, if a plurality of openings 22 are provided in the net member 16 and a plurality of divided feeding cylinders 20 are connected to the openings 22, respectively, even if a plurality of feeding parts 6 are provided in the nursery reef 2, feeding is simultaneously performed. Is possible. What is necessary is just to set suitably about the shape and dimension of the opening part 22. FIG. Further, the opening 22 is not formed by cutting out a part of the net member 16, but may be formed by applying a knitting method for providing the opening 22, as shown in FIG. Further, it is better that a special reinforcing process is applied to the edge of the opening 22. As shown in FIG. 9 or FIG. 10, the feeding cylinder 20 may be a cylindrical net member, but may be another cylindrical member. Moreover, as shown in FIG. 9, the feeding cylinder 20 may be detachably connected to the net member 16, or the net member 16 and the feeding cylinder 20 may be integrally formed. The feeding cylinder 20 and the net member may be connected and fixed by being tied with a rope, but the net member 16 and / or the feeding cylinder 20 may be provided with a connecting member or a connecting means. Moreover, a weight member may be attached to the feeding cylinder 20. As the weight member, for example, there is a method in which a lead rope is knitted into the feeding cylinder 20 to form a weight member, but other members and means may be used. The shape, structure, mounting method, etc. are set so that when the weight member is attached to the feeding cylinder 20, the weight member is not entangled or caught by the net member 16, the solid filling member 14, or other obstacles. Good to do.

  Moreover, the feeding cylinder 20 is good to be connected with the sea buoy 28 and the string member 26, as FIG. 12 showed. The string member 26 is preferably made of a material that does not corrode easily and has an appropriate strength, and ropes generally used in aquaculture sites or the like may be used. Moreover, what is necessary is just to use what is generally used by the fishery and aquaculture industry for the maritime buoy 28.

  In addition, the feeding unit 6 may be provided with a culture tool 36 for culturing the algae for feeding the juvenile shellfish 24. By providing this culturing device 36, the feeding frequency can be reduced with the growth of the algae for feed, and juvenile childcare is facilitated. In addition, it can be learned that the larvae 24 prey on the algae within the reef body 4, and it can be expected to survive even if they are out of the reef body 4. In the present invention, as shown in FIG. 4 or 5, as the culture tool 36, a plurality of ropes are passed to the upper part of the feeding unit 6, and spores such as seaweed and kombu are coated on the ropes. In addition to this, a dedicated tool for cultivating feed algae may be installed, or spores of feed algae may be applied to the wall body 8 or the reef block 10 or embedded. What is necessary is just to set suitably the shape and structure.

  The above is the description of the juvenile shellfish reef 2 according to the present invention. Next, the childcare method of the juvenile shell 24 using the juvenile shellfish reef 2 according to the present invention will be described. First, the reef blocks 10 are arranged in a substantially ring shape at the place where the nursery reef 2 is installed. The arrangement may be regular as shown in FIG. 3 or may be arranged appropriately, but it is preferable that the arrangement is made without creating a gap so that no harmful organisms can enter between the reef blocks 10. . If necessary, adjacent reef blocks 10 may be coupled and fixed by a coupling tool or coupling means.

  After arranging the reef block 10, the juvenile 24 is released into the feeding unit 6. At this time, the juvenile shells 24 may be released into the reef body 4 as they are, but a large amount of juvenile shells 24 may be bonded to the inhabiting collector 30 and the inhabiting collector 30 may be lined up with the feeding unit 6. . After the juvenile 24 is discharged, the cover member 12 is put on the reef body 4, and the cover member 12 and the reef block 10 are connected and fixed. Then, the feeding cylinder 20 is connected and fixed to the edge of the opening 22 of the cover member 12. Then, as shown in FIG. 12, a string member 26 is attached to the other mouth side of the feeding cylinder 20, and the buoy 28 that floats on the sea and the string member 26 are connected. The string member 26 is adjusted to an appropriate length so that the feeding cylinder 20 can sink to the seabed or the reef body 4 side by a weight member attached to the feeding cylinder 20. This completes the installation of the juvenile shellfish reef 2.

  When feeding bait to the nursery reef 2, when the string member 26 connected to the sea buoy 28 is dragged on the ship, the feeding cylinder 20 rises and the mouth of the feeding cylinder 20 is drawn to near the sea surface. Then, as shown in FIG. 12, when bait such as crushed seaweed is introduced into the serving cylinder and compressed by the water absorption pipe, the bait flows into the feeding unit 6 through the feeding tube 20.

  The juveniles 24 hiding in the wall 8 and the habitat collector 30 come out of the wall 8 and the habitat collector 30 to eat the bait when they are fed into the feeding section 6. When you finish eating, you hide again in the wall 8 and the inhabiting collector 30. By repeating this action, the young shellfish 24 comes to learn the habit of hiding themselves in the rocky area and in the shade, and the possibility of survival even when going out of the nursery reef 2 is increased. In addition, the feeding is performed once a day for a certain period after the juvenile 24 is released. When the culture tool 36 is installed in the reef body 4, the feeding frequency may be reduced as the algae for feed grows. When the juvenile shells 24 grow to some extent in the nursery reef 2, they come out of the reef body 4 by themselves and can diffuse the juvenile shells 24 outside the reef body 4.

  By raising in this way, the initial depletion of the released larvae 24 can be greatly reduced, and a stable catch of marine resources and marine products can be ensured. Moreover, since the young shellfish 24 can be made to learn the relationship with the growth environment and harmful organisms during the childcare period, a high survival rate can be expected.

  Although the above is the description regarding the larva nursery reef 2 according to the present invention, various conditions and settings can be changed without departing from the object of the present invention.

2 Juvenile shellfish reef 4 Reef body 6 Feeding section 8 Wall body 10 Reef block 12 Cover member 14 Solid filling member 16 Net member 18 Feeding section 20 Feeding cylinder 22 Opening 24 Juvenile shellfish 26 String member 28 Buoy 30 Liver collector 32 Main body 34 Leg 36 Incubator

Claims (13)

  It consists of a reef body for raising juvenile shellfish and a net member that covers the reef body, and the net member has a bait input unit for supplying food to the reef body from outside the net member A juvenile shellfish reef characterized by   The juvenile shellfish reef according to claim 1, wherein the reef body includes a feeding portion in which food fed from the bait feeding portion accumulates and a wall body that substantially surrounds the feeding portion.   The juvenile shellfish reef according to claim 2, wherein the wall body is formed by arranging a plurality of reef blocks, and the reef block includes a cover member and a solid filling member filled in the cover member. .   The juvenile shellfish reef according to claim 3, wherein the cover member is a net bag or a net cage.   The juvenile shellfish reef according to any one of claims 2 to 4, wherein the filling member is a crushed material such as stone or concrete and is randomly filled in the cover member.   The juvenile shellfish reef according to any one of claims 2 to 5, wherein the feeding section includes a habitat collector for forming a place where the juvenile shellfish hides.   The habitat collector includes a substantially plate-shaped main body portion and a leg portion that holds the main body portion, and the juvenile shellfish can hide between the habitat collector installation location and the main body portion. The larva nursery reef according to claim 6, wherein a gap is provided.   The said feeding part is equipped with the culture tool which culture | cultivates the algae for feed for the said young shellfish, The young shellfish nursery reef in any one of Claims 2-7 characterized by the above-mentioned.   The juvenile shellfish childcare according to any one of claims 1 to 8, wherein the bait throwing portion includes an opening provided in the net member and a cylindrical feeding tube rising from an edge of the opening. Reef.   The juvenile shellfish reef according to claim 9, wherein a weight member is attached to the feeding cylinder.   The juvenile shellfish reef according to claim 9 or 10, wherein the feeding tube is detachable from the net member.   The juvenile shellfish reef according to any one of claims 9 to 11, wherein the feeding tube is connected to a sea buoy by a string member.   The juvenile shellfish reef according to any one of claims 1 to 12, wherein a float is attached to the outer surface of the net member.

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