JP2017055719A - Seedling stocking method of sea cucumber - Google Patents

Seedling stocking method of sea cucumber Download PDF

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JP2017055719A
JP2017055719A JP2015184129A JP2015184129A JP2017055719A JP 2017055719 A JP2017055719 A JP 2017055719A JP 2015184129 A JP2015184129 A JP 2015184129A JP 2015184129 A JP2015184129 A JP 2015184129A JP 2017055719 A JP2017055719 A JP 2017055719A
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sea cucumber
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松本 和弘
Kazuhiro Matsumoto
和弘 松本
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LITONCOSMO CO Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

PROBLEM TO BE SOLVED: To provide a seedling stocking method of sea cucumber in which the sea cucumber can stably be mass-produced without taking labor and cost in comparison with a former method.SOLUTION: A seedling stocking method of sea cucumber concerning the present invention includes: a step of alternately laminating a shell layer 12 with shell 11 spread all over and a second net 10 with sea cucumber seedling adhering thereto in a bag-shaped first net 13, and interposing the second net 10 between the shell layers 12; a step of setting up a cylindrical body 15 with multiple through-holes 15a formed in an outer circumferential part in the seabed; and a step of inserting the first net 13 with the shell 11 and the second net 10 stored therein to the cylindrical body 15 set up in the seabed.SELECTED DRAWING: Figure 1

Description

本発明は、ナマコの種苗放流方法に関する。   The present invention relates to a sea cucumber seedling release method.

近年、中国では、急速な経済発展によって富裕層が増加し、高級食材であるナマコの需要が拡大している。これに伴い、日本から中国に向けて輸出されるナマコ製品が急増している。しかし、ナマコの乱獲が進むと、ナマコ資源が枯渇してナマコの安定供給ができなくなるだけでなく、海洋生物の多様性保全にも悪影響を及ぼすおそれがある。そこで、ナマコ資源の回復を図るための方策としてナマコの養殖や増殖などが行われている。   In recent years, in China, the wealthy class has increased due to rapid economic development, and the demand for sea cucumbers, which are high-quality foods, has expanded. Along with this, sea cucumber products exported from Japan to China are rapidly increasing. However, if sea cucumbers are overfished, sea cucumber resources will be depleted and stable supply of sea cucumbers will not be possible. Therefore, sea cucumbers are cultivated or proliferated as a measure to recover sea cucumber resources.

養殖は、一定区域を占有して、その区域内で自己所有の魚介類や藻類などの生活と環境を管理し、それら生物の繁殖や成長を図り、目的とする大きさ(商品サイズ)まで育成する方法である。例えば特許文献1では、養殖槽本体の底部に配置されたナマコ収納用の格子枠の上方にバッフルが配置され、養殖槽本体の側壁に設けられた通水窓に側部網が張設されると共に、養殖槽本体の頂部開口に頂部網が張設されたナマコ養殖施設が開示されている。   Aquaculture occupies a certain area, manages the life and environment of self-owned seafood, algae, etc. in that area, breeds and grows these organisms, and grows to the target size (product size) It is a method to do. For example, in patent document 1, a baffle is arrange | positioned above the lattice frame for the sea cucumber storage arrange | positioned at the bottom part of a culture tank main body, and a side net | network is stretched by the water flow window provided in the side wall of the culture tank main body. In addition, a sea cucumber aquaculture facility is disclosed in which a top net is stretched at the top opening of the main body of the aquaculture tank.

また、増殖は、天然水域において漁業資源が減少してきた際に、これを回復し、あるいはより積極的に天然資源を増大・維持する手段と技法を指し、ナマコの場合、人工採苗や天然採苗などが行われている。   Proliferation refers to means and techniques for recovering fishery resources in natural waters, or for more actively increasing and maintaining natural resources. In the case of sea cucumbers, artificial seedlings and natural harvesting There are seedlings.

ナマコの人工採苗では、親ナマコから採取した卵と精子とを混ぜ合わせて受精させ、孵化した幼生を回収して幼生飼育を行い、稚ナマコに成長すると中間育成が行われる。体長が15mm〜20mm程度に成長した稚ナマコは、水深10m以浅の岩礁帯や転石帯に潜水放流もしくは船上から直撒き放流される。
一方、天然採苗は、人工採苗に比べてコストが低く、労力も掛からないが、天然の再生産力に依存するため、環境条件に大きく左右される。
In sea cucumber artificial seedlings, eggs and sperm collected from a parent sea cucumber are mixed and fertilized, and hatched larvae are collected and larva reared. The juvenile sea cucumber that has grown to a length of about 15 mm to 20 mm is discharged into a reef zone and a boulder zone with a depth of 10 m or less, and is released from a ship by direct diving.
Natural seedlings, on the other hand, are less costly and less labor-intensive than artificial seedlings, but depend on natural reproductive power and are greatly affected by environmental conditions.

実開昭64−43666号公報Japanese Utility Model Publication No. 64-43666

(地独)青森県産業技術センター水産総合研究所,「ナマコ種苗放流マニュアル」,平成24年3月(Germany) Aomori Prefectural Industrial Technology Center Fisheries Research Institute, “Sea cucumber seedling release manual”, March 2012

放流した稚ナマコは、害敵による食害や潮流の影響を受けて減耗する。非特許文献1では、底質の異なる海域における放流稚ナマコの残留率に関する調査が行われている。当該調査では、底質の異なる海域ごとに10m四方の試験区を設定して各試験区の中央1mに、体長20mm前後の稚ナマコを1000個体又は2000個体放流し、放流した稚ナマコの生残、移動について定期的に調査している。その結果、全ての試験区において放流直後から稚ナマコが減少し、放流後20週目には、試験区の中央1mにおいて、稚ナマコの生息を殆ど確認することができなかったと報告されている。 The released juvenile sea cucumber is depleted under the influence of food damage and tidal currents caused by the enemy. In Non-Patent Document 1, a survey is conducted on the residual rate of released sea cucumbers in sea areas with different bottom sediments. In this survey, a 10m square test zone was set for each sea area with different bottom sediments, and 1000 or 2000 juvenile sea cucumbers with a body length of about 20 mm were released into the center 1 m 2 of each test zone. We are regularly investigating the remaining movements. As a result, it was reported that the number of juvenile sea cucumbers decreased immediately after the release in all the test areas, and almost no habitat of juvenile sea cucumbers could be confirmed in the center 1 m 2 of the test area 20 weeks after the release. .

このように、放流した稚ナマコの減耗は避けることができないが、放流する稚ナマコのサイズが大きいほど放流効果は高くなると一般に言われている。しかし、大型種苗の生産は労力やコストが掛かるだけでなく、生産量も限られるという問題がある。
なお、「種苗」とは、養殖や放流に用いる水生動物の卵や幼生のことであって、本明細書では、ナマコの幼生及び稚ナマコを総称して「種苗」と呼ぶ。
Thus, although it is unavoidable that the released juvenile sea cucumber is depleted, it is generally said that the larger the size of the juvenile sea cucumber to be released, the higher the release effect. However, the production of large seedlings is not only labor and cost intensive, but also has a problem of limited production.
The “seed and seedling” refers to eggs and larvae of aquatic animals used for aquaculture and release. In this specification, sea cucumber larvae and juvenile sea cucumbers are collectively referred to as “seed and seedlings”.

本発明はかかる事情に鑑みてなされたもので、従来に比べて労力やコストが掛からず、安定的にナマコを量産することができるナマコの種苗放流方法を提供することを目的とする。   The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a sea cucumber seedling discharge method that can stably mass-produce sea cucumbers without requiring labor and cost as compared with the prior art.

上記目的を達成するため、本発明に係るナマコの種苗放流方法は以下の工程を備えることを特徴としている。
(1)袋状の第1の網の中に、貝殻を敷き詰めた貝殻層とナマコの種苗が付着した第2の網とを交互に積層して前記貝殻層間に前記第2の網を介装する工程
(2)外周部に複数の貫通孔が形成された筒体を海底に立設する工程
(3)前記貝殻と前記第2の網が収納された前記第1の網を、海底に立設された前記筒体に挿入する工程
To achieve the above object, the sea cucumber seedling release method according to the present invention is characterized by comprising the following steps.
(1) A shell layer in which shells are spread and a second mesh with sea cucumber seedlings are alternately stacked in a bag-shaped first net, and the second net is interposed between the shell layers. (2) A step of standing a cylindrical body having a plurality of through-holes formed on the outer periphery thereof on the sea floor (3) A first net containing the shell and the second net standing on the sea floor Inserting into the provided cylinder

本発明では、ナマコの種苗が、その生長に伴って、第2の網から、第2の網に隣接する貝殻の中へ生息場所を移動する。その間、ナマコ種苗は、筒体や筒体内の貝殻によって害敵や潮流から保護される。貝殻の中で、ある程度の大きさに生長した稚ナマコ(種苗)は、筒体に形成された貫通孔から筒体外へ移動し、筒体の周囲で生息する。   In the present invention, sea cucumber seedlings move their habitat from the second net into the shell adjacent to the second net as the seedlings grow. Meanwhile, sea cucumber seedlings are protected from harmful enemies and tidal currents by cylinders and shells inside the cylinders. In the shell, juvenile sea cucumber (seed seedling) that has grown to a certain size moves out of the cylinder from the through-hole formed in the cylinder and inhabits around the cylinder.

また、本発明に係るナマコの種苗放流方法では、海底に立設された前記筒体の周囲に石材を積み付けることを好適とする。   In the sea cucumber seedling discharge method according to the present invention, it is preferable that stones are stacked around the cylindrical body standing on the seabed.

当該構成では、筒体が潮流で流されないように、石材で筒体を海底に固定すると共に、石材間の隙間が、筒体外へ移動した稚ナマコの新たな生息場所となり、害敵や潮流から稚ナマコを保護する。   In this configuration, the cylinder is fixed to the sea floor with stones so that the cylinders are not washed away by tidal currents, and the gaps between the stones become new habitats for juvenile sea cucumbers that have moved out of the cylinders. Protect the juvenile sea cucumber.

本発明に係るナマコの種苗放流方法では、害敵や潮流の影響を排除しつつ、ナマコ種苗の生長過程に応じた生息場所を提供できるので、放流後におけるナマコ種苗の残留率が高く、従来のような労力やコストを掛けることなく、安定的にナマコを量産することができる。   In the sea cucumber seedling release method according to the present invention, it is possible to provide a habitat according to the growth process of sea cucumber seedlings while eliminating the effects of harmful enemies and tidal currents, so the residual rate of sea cucumber seedlings after release is high, The sea cucumber can be mass-produced stably without taking such labor and cost.

本発明の一実施の形態に係るナマコの種苗放流方法の手順を説明するための分解斜視図である。It is a disassembled perspective view for demonstrating the procedure of the sea cucumber seedling discharge method which concerns on one embodiment of this invention. 海底に設置された筒体の立断面図である。It is an elevation sectional view of the cylinder installed in the seabed.

続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態について説明し、本発明の理解に供する。   Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

本発明の一実施の形態に係るナマコの種苗放流方法の手順を図1及び図2を用いて説明する。
(1)線材によって形成された有底円筒状もしくは逆円錐台状のカゴ14の中に、上端が開口部とされた袋状の第1の網13をセットする。その際、第1の網13の開口部を外側に折り返しておくと、その後の作業がやりやすくなる。
The procedure of the sea cucumber seedling release method according to an embodiment of the present invention will be described with reference to FIGS.
(1) A bag-shaped first net 13 having an upper end as an opening is set in a bottomed cylindrical or inverted frustoconical cage 14 formed of a wire rod. In that case, if the opening part of the 1st net | network 13 is folded back outside, it will become easy to do the subsequent operation | work.

(2)第1の網13の中に、底が見えなくなる程度に貝殻11を敷き詰めて貝殻層12を形成する。その際、周囲に壁を作るような感じで貝殻11を敷き詰めていき、後述する第2の網10に付着したナマコの種苗が側方に逸脱するのを防止する。
(3)敷き詰めた貝殻11、即ち貝殻層12の上に、ナマコの種苗が付着した第2の網10を敷く。第2の網10が外から見えないようにするため、可能な限り、貝殻11の中に第2の網10を収めるようにする。ただし、貝殻11の中に第2の網10を収める際、ナマコの種苗が逸脱しないように慎重に取り扱う。
(2) A shell layer 12 is formed by spreading the shells 11 in the first net 13 so that the bottom is not visible. At that time, the shells 11 are spread as if a wall is formed in the periphery, and sea cucumber seedlings attached to the second net 10 described later are prevented from deviating sideways.
(3) On the spread shells 11, that is, the shell layers 12, the second net 10 with sea cucumber seedlings attached is laid. In order to prevent the second net 10 from being seen from the outside, the second net 10 is accommodated in the shell 11 as much as possible. However, when the second net 10 is placed in the shell 11, it is handled carefully so that the sea cucumber seedlings do not deviate.

(4)第2の網10の上に、第2の網10が見えなくなる程度に貝殻11を敷き詰めて貝殻層12を形成する。その際、先ほどと同様、周囲に壁を作るような感じで貝殻11を敷き詰めていく。なお、貝殻11を押し込むと、第2の網10に付着しているナマコの種苗が潰れてしまう可能性があるので、慎重に敷き詰めていく。
(5)上述した(3)と(4)の作業を4〜5回程度繰り返し、貝殻層12間に第2の網10が介装された積層体を第1の網13の中に形成する。その後、第1の網13の上端部を閉じて開口部を塞ぐ。
(4) A shell layer 12 is formed on the second net 10 by spreading the shell 11 so that the second net 10 is not visible. At that time, as before, the shells 11 are spread like a wall around. In addition, when the shell 11 is pushed in, there is a possibility that the sea cucumber seedlings attached to the second net 10 may be crushed.
(5) The above operations (3) and (4) are repeated about 4 to 5 times to form a laminated body in which the second net 10 is interposed between the shell layers 12 in the first net 13. . Thereafter, the upper end of the first net 13 is closed to close the opening.

(6)外周部に複数の貫通孔15aが形成された筒体15を、水深10m以浅(好ましくは水深5m程度)の海底17に立設し、筒体15の周囲に石材16を積み付ける。
(7)貝殻11と第2の網10が収納された第1の網13を、カゴ14の中に入れた状態で、海底17に立設された筒体15に挿入する。カゴ14と筒体15との間に隙間があるときは、隙間に貝殻11を挟み込み、第1の網13が動かないようにする。
(6) The cylinder 15 having a plurality of through holes 15a formed on the outer peripheral portion is erected on the seabed 17 having a depth of 10 m or less (preferably about 5 m), and a stone 16 is stacked around the cylinder 15.
(7) The first net 13 in which the shell 11 and the second net 10 are stored is inserted into the cylinder 15 erected on the seabed 17 in a state where the first net 13 is placed in the cage 14. When there is a gap between the cage 14 and the cylinder 15, the shell 11 is sandwiched in the gap so that the first net 13 does not move.

筒体15の材質は、塩化ビニールなどの合成樹脂である。本実施の形態では、筒体15の外径を30cm、高さを60cm、貫通孔15aの径を5cm、貫通孔15aの中心間距離を10cmとしている。また、カゴ14を構成する線材の材質はポリプロピレンなどの合成樹脂とし、カゴ14の外径は筒体15の内径とほぼ同じサイズとしている。   The material of the cylinder 15 is a synthetic resin such as vinyl chloride. In the present embodiment, the outer diameter of the cylinder 15 is 30 cm, the height is 60 cm, the diameter of the through hole 15a is 5 cm, and the distance between the centers of the through holes 15a is 10 cm. The material of the wire constituting the cage 14 is a synthetic resin such as polypropylene, and the outer diameter of the cage 14 is approximately the same as the inner diameter of the cylinder 15.

貝殻11としては、カキ殻やホタテ貝殻のように表面が起伏に富むものが好ましい。
第2の網10に付着している種苗には、生後10日〜2週間程度のものを使用する。
As the shell 11, a shell having a rough surface such as an oyster shell or a scallop shell is preferable.
The seedlings that are attached to the second net 10 are those that are about 10 days to 2 weeks old.

第1の網13は、ポリエチレンなどの合成樹脂からなり、目合(網目の大きさ)は10mm〜15mm程度としている。また、第2の網10はナイロンなどの合成樹脂からなり、目合は0.2mm〜0.3mm程度である。   The first net 13 is made of a synthetic resin such as polyethylene and has a mesh (mesh size) of about 10 mm to 15 mm. The second net 10 is made of synthetic resin such as nylon and has a mesh size of about 0.2 mm to 0.3 mm.

石材16には、15cm〜30cm程度の大きさのものが好適である。   The stone material 16 is preferably about 15 to 30 cm in size.

第2の網10に付着したナマコの種苗は、その生長に伴って、第2の網10から、第2の網10に隣接する貝殻11の中へ生息場所を移動する。貝殻11の中で、ある程度の大きさに生長した稚ナマコ(種苗)は、筒体15に形成された貫通孔15aから筒体15外へ移動し、筒体15の周囲に積み付けられた石材16間の隙間を新たな生息場所とする。ナマコの種苗は、筒体15や筒体15内の貝殻11あるいは石材16によって害敵や潮流から保護される。   The sea cucumber seedlings attached to the second net 10 move from the second net 10 to the shells 11 adjacent to the second net 10 as they grow. A juvenile sea cucumber (seed seedling) that has grown to a certain size in the shell 11 moves from the through-hole 15a formed in the cylindrical body 15 to the outside of the cylindrical body 15, and is stacked around the cylindrical body 15 The gap between 16 is a new habitat. Sea cucumber seedlings are protected from harmful enemies and tidal currents by the cylinder 15, the shell 11 or the stone 16 in the cylinder 15.

以上、本発明の一実施の形態について説明してきたが、本発明は何ら上記した実施の形態に記載の構成に限定されるものではなく、特許請求の範囲に記載されている事項の範囲内で考えられるその他の実施の形態や変形例も含むものである。例えば、上記実施の形態では、筒体の形状を円筒状としているが、これに限定されるものではなく、多角柱状など他の形状でもよい。また、上記実施の形態では、筒体を合成樹脂製としているが、FRP製やコンクリート製等としてもよい。   Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and is within the scope of matters described in the claims. Other possible embodiments and modifications are also included. For example, in the above-described embodiment, the cylindrical body has a cylindrical shape, but is not limited to this, and may have another shape such as a polygonal column. Moreover, in the said embodiment, although the cylinder is made from a synthetic resin, it is good also as a product made from FRP, concrete, etc.

10:第2の網、11:貝殻、12:貝殻層、13:第1の網、14:カゴ、15:筒体、15a:貫通孔、16:石材、17:海底 10: second net, 11: shell, 12: shell layer, 13: first net, 14: basket, 15: cylinder, 15a: through hole, 16: stone, 17: seabed

Claims (2)

袋状の第1の網の中に、貝殻を敷き詰めた貝殻層とナマコの種苗が付着した第2の網とを交互に積層して前記貝殻層間に前記第2の網を介装する工程と、外周部に複数の貫通孔が形成された筒体を海底に立設する工程と、前記貝殻と前記第2の網が収納された前記第1の網を、海底に立設された前記筒体に挿入する工程とを備えることを特徴とするナマコの種苗放流方法。   A step of alternately stacking a shell layer in which shells are spread and a second mesh to which seedlings of sea cucumber are adhered in a bag-like first net, and interposing the second net between the shell layers; The cylinder in which a plurality of through holes are formed on the outer periphery of the cylinder, and the first net in which the shell and the second net are accommodated is provided on the sea floor. A seed insertion method for sea cucumber, characterized by comprising the step of inserting into the body. 請求項1記載のナマコの種苗放流方法において、海底に立設された前記筒体の周囲に石材を積み付けることを特徴とするナマコの種苗放流方法。   The sea cucumber seedling discharge method according to claim 1, wherein stones are stacked around the cylindrical body standing on the seabed.
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Publication number Priority date Publication date Assignee Title
CN114223589A (en) * 2022-01-25 2022-03-25 中国科学院南海海洋研究所 Bottom sowing proliferation method for tropical sea cucumber seedlings in open sea area
CN114342844A (en) * 2022-01-26 2022-04-15 广东天海参威科技开发有限公司 Breeding method of holothuria fuscogongensis
CN114532262A (en) * 2022-02-25 2022-05-27 凌海市达莲海珍品养殖有限责任公司 Three-dimensional breeding method for small-sized sea cucumber fries
JP7298829B1 (en) * 2023-01-17 2023-06-27 海洋建設株式会社 Nurturing reef for juvenile sea cucumbers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114223589A (en) * 2022-01-25 2022-03-25 中国科学院南海海洋研究所 Bottom sowing proliferation method for tropical sea cucumber seedlings in open sea area
CN114342844A (en) * 2022-01-26 2022-04-15 广东天海参威科技开发有限公司 Breeding method of holothuria fuscogongensis
CN114532262A (en) * 2022-02-25 2022-05-27 凌海市达莲海珍品养殖有限责任公司 Three-dimensional breeding method for small-sized sea cucumber fries
JP7298829B1 (en) * 2023-01-17 2023-06-27 海洋建設株式会社 Nurturing reef for juvenile sea cucumbers

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