JP2002262705A - Structure for liberation of juvenile fish - Google Patents

Structure for liberation of juvenile fish

Info

Publication number
JP2002262705A
JP2002262705A JP2001063399A JP2001063399A JP2002262705A JP 2002262705 A JP2002262705 A JP 2002262705A JP 2001063399 A JP2001063399 A JP 2001063399A JP 2001063399 A JP2001063399 A JP 2001063399A JP 2002262705 A JP2002262705 A JP 2002262705A
Authority
JP
Japan
Prior art keywords
base
release
discharge
fish
fish nest
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2001063399A
Other languages
Japanese (ja)
Other versions
JP4391707B2 (en
Inventor
Keiichi Katayama
敬一 片山
Shoji Uehara
昭治 上原
Shigeyasu Hara
茂恭 原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KAIYO KENSETSU KK
Ohmoto Gumi Co Ltd
Original Assignee
KAIYO KENSETSU KK
Ohmoto Gumi Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KAIYO KENSETSU KK, Ohmoto Gumi Co Ltd filed Critical KAIYO KENSETSU KK
Priority to JP2001063399A priority Critical patent/JP4391707B2/en
Publication of JP2002262705A publication Critical patent/JP2002262705A/en
Application granted granted Critical
Publication of JP4391707B2 publication Critical patent/JP4391707B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

Landscapes

  • Artificial Fish Reefs (AREA)
  • Farming Of Fish And Shellfish (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a structure for liberating juvenile aquatic life without causing the scattering of the liberated life to achieve the fixation of the life near an underwater construction. SOLUTION: The underwater construction provides an environment from the liberation to the fixation of juvenile life of artificially hatched or grown aquatic life. A liberation base 5 enabling the free access of juvenile life is detachably fixed to a submerged base 1 of the aquatic construction.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、人工的に孵化又は
育成した水棲生物の幼稚仔(例えば稚魚又は稚貝)を放流
する機能を備えた水中構造物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater structure having a function of releasing artificially hatched or bred aquatic creatures (for example, fry or fry).

【０００２】[0002]

【従来の技術】「獲る漁業」から「育てる漁業」への転
換という背景を受けて、卵又は孵化直後の水棲生物の幼
稚仔を一定期間育成して放流することが見られるように
なっている。現在は、陸上で育成した幼稚仔を海上か
ら、又は海中へそのまま放流している。こうした放流形
態では、放流直後は当然幼稚仔は群れているものの、幼
稚仔自身の移動や海流によって次第に離散するのが常で
あり、また外敵に食べられる等して、放流した海域に幼
稚仔が留まって、安全に成長することが少なかった。こ
れでは、育てる漁業としての採算性が低く、特に、釣り
に適した水中構造物(防波堤や護岸岸壁等)周辺における
幼稚仔の育成、水棲生物の繁殖が期待できなかった。2. Description of the Related Art In the context of the shift from "fishing" to "fishing", it has been observed that eggs or larvae of aquatic organisms immediately after hatching are raised and released for a certain period of time. . Currently, infants raised on land are released directly from the sea or into the sea. In such a form of release, the pups are naturally flocking immediately after the release, but they are usually dispersed gradually due to the movement of the pups themselves and the ocean currents. They stayed and grew less safely. In this case, profitability as a fishery to raise was low, and particularly, it was not possible to expect breeding of larvae and breeding of aquatic organisms around underwater structures (breakwaters, seawalls, etc.) suitable for fishing.

【０００３】成長した水棲生物については、生息環境の
定着を目的として、人工魚礁がよく用いられている。こ
うした人工魚礁を幼稚仔の放流に対して利用することも
考えられるが、人工魚礁は成長した水棲生物の出入りを
想定しているため、仮に幼稚仔を放流してもほとんど定
着作用をもたらさない。このように、現在は幼稚仔の放
流に対する離散対策をもたらす技術的解決手段が見当た
らず、とりわけ水中構造物周辺のような特定場所を狙っ
た幼稚仔の育成、水棲生物の繁殖はできていなかった。[0003] Artificial fish reefs are often used for grown aquatic organisms for the purpose of establishing a habitat. It is conceivable to use such artificial reefs for the release of larvae, but since artificial reefs are intended for the ingress and egress of grown aquatic organisms, even if the larvae are released, they hardly have a fixing effect. Thus, at present, no technical solution has been found to provide discrete measures against the release of larvae, and in particular, breeding of larvae and breeding of aquatic organisms aimed at specific locations such as around underwater structures have not been possible. .

【０００４】[0004]

【発明が解決しようとする課題】単純に幼稚仔の離散対
策を講じるとすれば、幼稚仔を通水性の袋に収納した状
態で放流して、離散しないように留め置くことが考えら
れるが、袋内外の出入りが幼稚仔の成長によって制限さ
れ、育てる漁業としての目的を達成し得ない。また、幼
稚仔自身は成長に伴って生息環境を探して移動するもの
であり、放流時の離散のみを考慮して放流態様を決定す
るわけにはいかない。こうした幼稚仔の移動は、従来水
棲生物の生息環境を提供しにくい人工的な水中構造物周
辺に多く見られる。そこで、特に水中構造物に着目し、
この水中構造物周辺での定着性を主眼とした幼稚仔の放
流を実現するため、放流時の離散対策作用を有する水中
構造物の構成について検討した。The problem to be solved by the present invention is to simply take measures to separate the infants, but it is conceivable to release the infants in a state of being stored in a water-soluble bag and to keep the infants from separating. Going in and out of the bag is limited by the growth of the pups and fails to achieve the goal of raising fishery. In addition, the larva itself moves in search of the habitat as it grows, and it is not possible to determine the release mode in consideration of only the discreteness at the time of release. Such movements of infants are often seen around artificial underwater structures where it is conventionally difficult to provide an aquatic habitat. Therefore, pay special attention to underwater structures,
In order to realize the release of infants with a focus on anchorage around the underwater structure, the structure of the underwater structure which has a discrete action at the time of release was studied.

【０００５】[0005]

【課題を解決するための手段】検討の結果開発したもの
が、人工的に孵化又は育成した水棲生物の幼稚仔放流か
ら定着までの環境を提供する水中構造物であって、幼稚
仔の出入りが可能な放流ベースをこの水中構造物の水没
部位へ着脱自在に位置固定することを特徴とする幼稚仔
放流構造物である。幼稚仔は、放流ベースに侵入させた
状態で放流ベース単位で放流域、すなわち幼稚仔放流構
造物の水没部位(通常水中基礎)へと運び、放流ベースの
まま前記水没部位に位置固定し、放流の用に供する。こ
こで、「着脱自在に位置固定する」とは、なんらかの係
合手段又は固定手段を用いて特定場所に留まるように、
放流ベースと水没部位とが構造的に一体となる(例えば
水没部位に置いた放流ベースを岩塊等で押さえる原始的
な手段でもよい)が、前記係合手段又は固定手段を解除
すれば放流ベースは単独で回収できることを意味する。
放流ベースは回収することで繰返し利用できるが、例え
ば現実的に、水中構造物構築の最終工程で、水没部位の
施工と共に放流ベースを取り付け、そのまま回収せずに
放置するようにしてもよい。また、水中構造物とは、全
体のうち一部が水没している構造物を指し、防波堤、護
岸岸壁や、海浜又は河川に見られる潜堤等が含まれる。[Means for Solving the Problems] As a result of the examination, what has been developed is an underwater structure that provides an environment from the release of the aquatic organisms hatched or raised artificially to the establishment of the larvae, and the entry and exit of the larvae. A kindergarten discharge structure characterized in that a possible release base is removably fixed to a submerged portion of the underwater structure. The infants are transported to the submerged area (usually a submerged base) of the baby-child release structure in a release base unit in a state in which they are intruded into the release base, and are fixed at the submerged site with the release base and released. Serve for Here, "removably fix the position" means to stay in a specific place using some kind of engaging means or fixing means,
The discharge base and the submerged part are structurally integrated (for example, primitive means for holding the discharge base placed at the submerged part with a rock mass or the like), but if the engaging means or the fixing means is released, the discharge base is released. Means that it can be recovered alone.
The discharge base can be used repeatedly by collecting it. For example, in actuality, in the final step of constructing an underwater structure, the discharge base may be attached together with the construction of the submerged portion, and may be left as it is without being collected. The underwater structure refers to a structure that is partially submerged in the whole, and includes a breakwater, a revetment quay wall, a submergence found on a beach or a river, and the like.

【０００６】具体的には、(a)放流ベースは、魚礁作用
を発揮する魚巣ベースへ着脱自在に嵌合し、この放流ベ
ース及び魚巣ベースを一体とした放流ユニットを構成し
てなり、この放流ユニットを幼稚仔放流構造物の水没部
位に位置固定する。この構成では、放流ベースを魚礁作
用のある魚巣ベースで囲むことによって、放流後、成長
した幼稚仔の定着を図るわけである。幼稚仔放流構造物
の水没部位は、前記魚巣ベース及び放流ベースからなる
放流ユニットを海流等に対して位置固定するアンカー
(いわゆる固定手段)となる。より具体的には、放流ユニ
ットは、幼稚仔放流構造物の水没部位に設けた嵌合枠に
嵌合するとよい。嵌合枠は、水没部位表面に立設した枠
体でもよいし、水没部位内に形成した嵌合穴でもよい。
幼稚仔放流構造物が整流作用を目的としたものであれ
ば、前記嵌合穴又は魚巣部位に放流ユニットを完全に嵌
め込み、水没部位表面から放流ユニット(魚巣ベース又
は放流ベース)が突出しないことが望ましい。また、放
流ユニットを用いない場合、放流ベースは、幼稚仔放流
構造物の水没部位に形成した魚礁作用を発揮する魚巣部
位へ着脱自在に嵌合し、この幼稚仔放流構造物の水没部
位に位置固定する。Specifically, (a) the discharge base is detachably fitted to a fish nest base that exerts a reef function, and constitutes a discharge unit integrating the discharge base and the fish nest base. This discharge unit is fixed in position at the submerged portion of the baby-child release structure. In this configuration, the release base is surrounded by a fish nest base having a fish reef effect, so that the larva that has grown after release is established. The submerged part of the infant breeding release structure is an anchor for fixing the position of the release unit composed of the fish nest base and the release base with respect to an ocean current or the like.
(So-called fixing means). More specifically, the discharge unit may be fitted to a fitting frame provided at a submerged portion of the baby-child release structure. The fitting frame may be a frame standing on the surface of the submerged part or a fitting hole formed in the submerged part.
If the kindergarten release structure is intended for rectification, the release unit is completely fitted into the fitting hole or fish nest site, and the release unit (fish nest base or release base) does not protrude from the submerged site surface. It is desirable. In addition, when the release unit is not used, the release base is detachably fitted to the fish nest part that exerts the reef effect formed in the submerged part of the infant release structure, and is attached to the submerged part of this child release structure. Fix the position.

【０００７】幼稚仔放流構造物の水没部位はこの幼稚仔
放流構造物の水中基礎であり、一般にコンクリートで構
成されることが多いが、好ましくは大きな塊状物を乱雑
に充填し、この塊状物と魚巣ベース又は放流ベースとの
間や塊状物相互間に幼稚仔又は水棲生物が出入り可能な
隙間を多数形成するとよい。ここにいう塊状物は、例え
ば建造物の解体後に排出されるコンクリート屑や新製の
コンクリートブロック(プレキャストコンクリートブロ
ック)のほか、環境親和性を考慮した場合、とりわけ自
然の岩塊が好ましい。放流ユニットを嵌合する嵌合枠
や、放流ベースを直接嵌合する魚巣部位は、こうした岩
塊で構成するとよい。[0007] The submerged part of the structure is the underwater foundation of the structure, and is generally made of concrete. It is preferable to form a large number of gaps between the fish nest base or the release base and between the clumps, through which the larva or aquatic organism can enter and exit. The lump used herein is preferably, for example, concrete debris discharged after demolition of a building, a new concrete block (precast concrete block), or a natural lump in consideration of environmental compatibility. A fitting frame into which the discharge unit is fitted, and a fish nest portion into which the discharge base is directly fitted may be made of such a rock mass.

【０００８】魚巣ベース又は魚巣部位は、放流後の幼稚
仔や水棲生物の生息環境を提供する魚礁として機能す
る。水没部位と別体となる魚巣ベースは、大きさや形状
は自由であるが、通水性ネットで構成した容体に海藻の
付着、繁殖を促す素材を充填した集魚ケースを単数又は
複数組み合わせた態様で、例えば(a)通水性ネット筒に
貝殻(素材)を充填した集魚ケースを多数配列して一体に
して構成、(b)枠体に通水性ネットを張り巡らした籠体
に貝殻(素材)を充填して構成、又は(c)前記各構成を魚
礁ブロック(構成単位)として複数個組み合わせて構成す
る。水没部位に対する位置固定を確実にするため、重量
物を納めた載置ベースを魚巣ベースへ一体に設けてもよ
い。集魚ケースを複数用いる場合、各集魚ケースを連結
し、更に相互の位置関係を拘束するように全体をフレー
ム等に配列するとよい。具体的には、鋼製枠材(アング
ル材、板材等)を組み合わせた枠体に多数の集魚ケース
を収納する構成を例示できる。放流ベースは、魚巣ベー
スに設けた嵌合部位又は魚礁ブロックを組み合わせて形
成した嵌合部位に嵌め込む。嵌合する放流ベースの数は
問わない。集魚ケースは、本発明者提案の特許第184041
8号、特許第1943699号、特許第2695735号や特開平07-23
6385号等に詳しい。[0008] The fish nest base or the fish nest site functions as a fish reef that provides a habitat for larvae and aquatic organisms after release. The fish nest base, which is separate from the submerged site, is free in size and shape, but in a form combining one or more fish collection cases filled with a material that promotes the adhesion and propagation of seaweed on a container composed of a water-permeable net For example, (a) a large number of fish collecting cases filled with shells (material) in a water-permeable net cylinder are arranged and integrated, and (b) a shell (material) is placed in a basket with a water-permeable net stretched over a frame. (C) A combination of a plurality of the above components as a fish reef block (structural unit). In order to secure the position fixation with respect to the submerged part, a mounting base containing a heavy object may be provided integrally with the fish nest base. When a plurality of fish collecting cases are used, the respective fish collecting cases may be connected, and the whole may be arranged in a frame or the like so as to restrict the mutual positional relationship. Specifically, a configuration in which a large number of fish collecting cases are housed in a frame body formed by combining steel frame materials (angle materials, plate materials, and the like) can be exemplified. The release base is fitted into a fitting part provided on the fish nest base or a fitting part formed by combining fish reef blocks. The number of fitting discharge bases does not matter. The fish collecting case is a patent No. 184041 proposed by the present inventor.
No. 8, Patent No. 1943699, Patent No. 2695735 and JP-A-07-23
Details on No. 6385.

【０００９】幼稚仔の放流を担う放流ベースは、放流域
まで幼稚仔を一定数量毎に運搬するコンテナとして機能
するほか、放流後の幼稚仔の生息環境、特に外敵からの
待避場所を提供する幼稚仔特化の魚礁として機能する。
この放流ベースの大きさや形状は自由であるが、通水性
ネットで構成した容体に幼稚仔が侵入する隙間を形成す
る素材を充填した保護ケースを単数又は複数組み合わせ
た態様で、例えば、(a)通水性ネット筒に貝殻(素材)を
充填した集魚ケースを多数配列して一体にして構成、
(b)通水性ネット筒にブラシ状繊維束(素材)を充填した
集魚ケースを多数配列して一体にして構成、(c)枠体に
通水性ネットをはり巡らした籠体に貝殻(素材)を充填し
て構成、又は(d)前記各構成を放流ブロック(構成単位)
として複数個組み合わせて構成する。基本的には魚巣ベ
ース類似の構造となるが、魚巣ベースは幼稚仔放流構造
物の水没部位に対して位置固定し、破損等を除いては除
去しないことを前提とするのに対して、放流ベースは必
要に応じて回収し、再び放流の用に供する点が異なる。
また、魚巣ベースは海藻の繁殖を想定しているが、放流
ベースは幼稚仔の侵入を想定しているので、内部の密度
(隙間の程度)が異なる。The release base, which is responsible for the release of the pups, functions as a container for transporting the pups to the release area in fixed quantities, and also provides a habitat for the pups after the release, especially a place to provide shelter from foreign enemies. Functions as a fish reef specializing in pups.
Although the size and shape of this discharge base are free, in a mode in which one or a plurality of protective cases filled with a material forming a gap into which a child enters a container formed of a water-permeable net, for example, (a) A large number of fish collection cases filled with shells (materials) in a water-permeable net cylinder are arranged and integrated,
(b) A large number of fish collection cases filled with brush-like fiber bundles (material) in a water-permeable net cylinder are arranged and integrated, and (c) a shell with a water-permeable net wrapped around a frame (material) Or (d) a discharge block (constituent unit)
As a combination. Basically, the structure is similar to the fish nest base, except that the fish nest base is fixed to the submerged part of the structure for the release of infants and is not removed except for damage etc. However, the difference is that the discharge base is collected as needed and is used again for discharge.
In addition, the fish nest base assumes the propagation of seaweed, but the release base assumes the invasion of larvae.
(The degree of gap) is different.

【００１０】放流ベース内の素材の隙間は、相対的に外
部より暗くなる。そこで、幼稚仔は前記暗部へ向かって
いく性質を利用して、幼稚仔を育成している水槽等に放
流ベースを沈めると、幼稚仔自らが放流ベースに侵入し
て、一定数の幼稚仔を容易に放流ベース内に収納でき
る。こうして大量の幼稚仔が潜り込んだ放流ベースは、
密閉ケース(稚魚の場合)又は通水性ケース(稚貝の場合)
で覆って幼稚仔の離散を防ぎながら、運搬手段(船又は
トラック)へ移して放流域にまで運搬する。放流域で
は、船上からクレーン又はダイバーの手により放流ベー
スを魚巣ベース又は水没部位の魚巣部位にまで運び、魚
巣ベース又は魚巣部位に放流ベースを嵌合すれば、放流
が完了する。幼稚仔は、当初は比較的静穏な放流ベース
に留まって成長するが、成長するに従って活動範囲を魚
巣ベース周辺、幼稚仔放流構造物の水没部位近辺へと拡
げる。放流ベースは、幼稚仔が十分に成長した段階で回
収し、次の放流に利用する。The gap between the materials in the discharge base becomes relatively darker than the outside. Therefore, when the pups use the property of going to the dark area and submerge the release base in a tank or the like where the pups are raised, the pups themselves invade the release base, and a certain number of pups It can be easily stored in the discharge base. The release base, into which a large number of infants have sunk,
Sealed case (for fry) or water-permeable case (for fry)
Transfer to transport means (boat or truck) and transport to the discharge area while preventing the pups from falling apart by covering. In the discharge area, the discharge base is carried to the fish nest base or the fish nest part of the submerged part by the hand of a crane or a diver from the ship, and the discharge is completed by fitting the discharge base to the fish nest base or the fish nest part. Initially, the pups grow on the relatively calm release base, but as they grow, the range of activity expands around the fish nest base and near the submerged site of the pup release structure. The release base is collected at the stage when the pups have grown sufficiently and used for the next release.

【００１１】[0011]

【発明の実施の形態】以下、本発明の実施形態について
図を参照しながら説明する。図１は本発明を構成する防
波堤(幼稚仔放流構造物)の一例を表す斜視図、図２は同
幼稚仔放流構造物の水中基礎(水没部位)１に嵌合する放
流ユニット２(載置ベース３、魚巣ベース４及び放流ベ
ース５)の全体斜視図、図３は同放流ユニット２の組み
付け関係を表す斜視図、図４は魚巣ベース４に対する放
流ベース５の嵌合関係を表す斜視図、図５は放流ベース
５の別例を表す斜視図、図６は同じく放流ベース５の別
例を表す斜視図、図７は集魚ケース６の構造を表す一部
破断斜視図、図８は別例の集魚ケース６の構造を表す一
部破断斜視図である。本例の防波堤は、図１に見られる
ように、防波堤壁７の水中基礎１に設けた嵌合穴(嵌合
枠)８に載置ベース３を備えた魚巣ベース４を嵌合して
位置固定し、この魚巣ベース４に略直方体形状の放流ベ
ース５を嵌合する態様である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view illustrating an example of a breakwater (a kindergarten discharge structure) constituting the present invention, and FIG. 2 is a discharge unit 2 (mounting part) fitted to an underwater foundation (submerged part) 1 of the kindergarten discharge structure. FIG. 3 is a perspective view showing an assembling relation of the discharge unit 2, and FIG. 4 is a perspective view showing a fitting relation of the discharge base 5 to the fish nest base 4. FIG. 5, FIG. 5 is a perspective view showing another example of the discharge base 5, FIG. 6 is a perspective view showing another example of the release base 5, FIG. 7 is a partially cutaway perspective view showing the structure of the fish collecting case 6, and FIG. It is a partially broken perspective view showing the structure of the fish collecting case 6 of another example. As shown in FIG. 1, the breakwater of this example is formed by fitting a fish nest base 4 having a mounting base 3 into a fitting hole (fitting frame) 8 provided in an underwater foundation 1 of a breakwater wall 7. In this embodiment, the position is fixed, and a substantially rectangular discharge base 5 is fitted to the fish nest base 4.

【００１２】放流ユニット２は、図２〜図４に見られる
ように、鋼製枠材(アングル材、板材等)９を組み合わせ
て構成した構造フレーム10内に略均一の大きさの岩塊11
(各図中全体を一体にて表示)を乱雑に充填した載置ベー
ス３を外殻として、構造フレーム10中心に魚巣ベース４
を固着し、この魚巣ベース４上面に放流ベース５を嵌合
する構成である(図３では岩塊を省略)。枠材９は岩塊11
の逸脱を防止し、水中基礎１の嵌合穴８へ放流ユニット
２を嵌め込む際の取扱いを容易にする。As shown in FIGS. 2 to 4, the discharge unit 2 includes a rock block 11 having a substantially uniform size in a structural frame 10 formed by combining steel frame members (angle members, plate members, etc.) 9.
(The whole of each figure is shown integrally) The fish nest base 4 is located at the center of the structural frame 10 with the mounting base 3 randomly filled
And a discharge base 5 is fitted to the upper surface of the fish nest base 4 (rock mass is omitted in FIG. 3). Frame material 9 is rock mass 11
Is prevented, and handling when the discharge unit 2 is fitted into the fitting hole 8 of the underwater foundation 1 is facilitated.

【００１３】魚巣ベース４は、図３に見られるように、
通水性ネット筒12に貝殻13を充填した集魚ケース６(図
７参照)を多段に積層した魚礁本体部14と、この魚礁本
体部14から上方に延設した鋼製枠材９からなる放流ベー
ス嵌合部15とからなる。本例の魚巣ベース４は、載置ベ
ース３と別体で製造しながら、載置ベース３と一体にな
るように、魚巣ベース４の脚と載置ベースの底面枠材９
とを固着している。載置ベース３の構造フレーム10と魚
巣ベース４との間に充填した岩塊11は、載置ベース３を
保護する役割もある。The fish nest base 4, as seen in FIG.
A fish reef main body 14 in which a fish collecting case 6 (see FIG. 7) in which a water-permeable net cylinder 12 is filled with shells 13 is stacked in multiple stages, and a discharge base comprising a steel frame member 9 extending upward from the fish reef main body 14. And a fitting portion 15. The fish nest base 4 of this example is manufactured separately from the mounting base 3, and the legs of the fish nest base 4 and the bottom frame member 9 of the mounting base are integrated with the mounting base 3.
Is fixed. The rock mass 11 filled between the structural frame 10 of the mounting base 3 and the fish nest base 4 also has a role of protecting the mounting base 3.

【００１４】放流ベース５は、図３又は図４に見られる
ように、鋼製枠材９で枠体を構成し、横向きに集魚ケー
ス６を配列して一体にした構造である。集魚ケース６の
大きさ、形状、配列向き、個数は自由であり、このほか
図５又は図６に示すような放流ベース５もある。この放
流ベース５(及び魚巣ベース４の魚礁本体部14)を構成す
る集魚ケース６は、図７に見られるように、通水性ネッ
ト筒12内に貝殻13(帆立貝、あこや貝、牡蠣ほか)の向き
を交互に変えながら、貝殻13相互にスペーサ16を介して
連ね、貝殻13全体をワイヤ17で束ねた構成である。スペ
ーサ16は、貝殻13相互の密着を防いで幼稚仔侵入の隙間
を形成する。また、ワイヤ17は外的負荷による貝殻13相
互の分離を防いでいる。このほか、図８に見られるよう
に、通水生ネット筒12内にブラシ状繊維束(素材)18を充
填した構成としてもよい。繊維束18を形成するワイヤ17
を張ることにより、通水生ネット筒12内で繊維束18が偏
ることなく、幼稚仔侵入を確保する隙間の形成ができ
る。繊維束には、一定の緊張を有する植物繊維(椰子の
実の繊維等)や合成樹脂繊維を用いることができるが、
環境調和性の観点からはできる限り自然繊維を用いるこ
とが望ましい。As shown in FIG. 3 or FIG. 4, the discharge base 5 has a structure in which a frame is formed by a steel frame member 9 and fish collecting cases 6 are arranged horizontally to be integrated. The size, shape, arrangement direction, and number of the fish collecting case 6 are arbitrary, and there is also a discharge base 5 as shown in FIG. 5 or FIG. As shown in FIG. 7, the fish collecting case 6 constituting the release base 5 (and the reef main body 14 of the fish nest base 4) has a shell 13 (scallop, akoya shell, oyster, etc.) in a water-permeable net tube 12. The shells 13 are connected to each other via a spacer 16 while alternately changing the directions of the shells 13, and the entire shell 13 is bundled with wires 17. The spacer 16 prevents the shells 13 from adhering to each other and forms a gap for the invasion of the infant. The wire 17 prevents the shells 13 from being separated from each other by an external load. In addition, as shown in FIG. 8, a configuration in which a brush-like fiber bundle (material) 18 is filled in the water-permeable net tube 12 may be employed. Wire 17 forming fiber bundle 18
By forming the gap, it is possible to form a gap for ensuring the invasion of the child without the fiber bundle 18 being biased in the water-permeable net tube 12. For the fiber bundle, vegetable fibers having a certain tension (such as coconut fibers) and synthetic resin fibers can be used.
From the viewpoint of environmental harmony, it is desirable to use natural fibers as much as possible.

【００１５】このような幼稚仔の放流機能を付加した幼
稚仔放流構造物は、次の手順で利用する。幼稚仔は陸上
施設の水槽で孵化又は育成しており、放流ベースは前記
水槽に沈め、一定時間放置する。幼稚仔は暗部に向かっ
て進む特性を有しているから、水槽全体に比べて暗い放
流ベースへ幼稚仔は自然と侵入していく。こうして幼稚
仔を放流ベースの各集魚ケース内に侵入させた後、放流
ベースは水槽内で運搬用の密閉ケース又は通水性ケース
に収納して引き上げ、幼稚仔が離散しない状態を保って
搬送手段(海では船、河川ではトラック等)により、放流
域に構築した幼稚仔放流構造物にまで運ぶ。放流域で
は、密閉ケースに収納したままの放流ベース(通水性ケ
ースは取り外してもよい)をダイバー又はクレーン等に
より水中へ持ち込み、水中基礎にまで運び、魚巣ベース
の放流ベース嵌合部に放流ベースを嵌め込めば放流が完
了する。作業完了直前まで放流ベースを密閉ケースに収
納していれば、幼稚仔の離散が最小限に抑制できる。[0015] The kindling release structure to which the kindling release function is added is used in the following procedure. The infants are hatched or raised in a water tank of a land facility, and the release base is submerged in the water tank and left for a certain period of time. Since the pups have the property of proceeding toward the dark part, the pups naturally invade the discharge base that is darker than the entire aquarium. After invading the infant larva into each fish collection case of the release base in this way, the release base is stored in a closed case or a water-permeable case for transportation in the water tank and pulled up, and the transport means (keeping the state where the child is not separated is carried out ( By ship in the sea, trucks in rivers, etc.), they are transported to the infant release structure constructed in the discharge area. In the discharge area, the discharge base (water-permeable case may be removed) kept in the closed case is brought into the water by a diver or a crane, carried to the underwater foundation, and discharged to the fish nest base discharge base fitting part The release is completed if the base is fitted. If the discharge base is stored in the sealed case until just before the work is completed, the dispersal of the infants can be minimized.

【００１６】魚巣ベースは、本発明の必須構成要素であ
り、魚礁作用を発揮する。加えて、水中基礎表面を、岩
塊等、水棲生物の出入りが可能な程度の隙間を有する構
成にしておくと、魚巣ベース及び水中基礎表面全体が一
体の魚礁作用として機能するようになる。このために
は、魚巣ベースのみならず、魚巣ベースと一体にした載
置ベース及び水中基礎表面は、できる限り自然物を材料
として構成し、環境調和性(海藻の繁殖等)を発揮させる
ことが好ましい。これにより、幼稚仔は一定程度にまで
生育するまでは、主として放流ベースを生息環境及び待
避場所として利用するが、その後魚巣ベースから水中基
礎全域へと生息環境を拡げ、幼稚仔放流構造物近辺に生
息するようになる。放流ベースは、こうした好ましい生
息環境内に配置して、幼稚仔を放流するわけである。The fish nest base is an essential component of the present invention and exerts a reef effect. In addition, if the underwater base surface is configured to have a gap that allows entry and exit of aquatic organisms such as rock masses, the fish nest base and the entire underwater base surface function as an integrated fish reef effect. To this end, not only the fish nest base, but also the mounting base and the underwater foundation surface integrated with the fish nest base should be made of natural materials as much as possible to demonstrate environmental harmony (such as breeding of seaweed). Is preferred. Until the larva grows to a certain extent, the breeding base is mainly used as a habitat and shelter until the larva grows to a certain extent. To inhabit. The release base is placed in such a favorable habitat and releases the pups.

【００１７】本例のように、基本的な構成が魚巣ベース
と類似な放流ベース(いずれも集魚ケースを基礎として
いる)であれば、幼稚仔の成長に従って放流ベースは魚
巣ベースと一体となって魚礁作用を発揮するので、回収
せずにそのまま放置しても構わない。しかし、本発明で
は、幼稚仔の十分な成長の後、次回の放流のために放流
ベースのみを回収し、次回の放流に利用することを特徴
としている。このとき、複数の幼稚仔放流構造物におけ
る各魚巣ベース(又は後述の魚巣部位)の放流ベース嵌合
部位及び放流ベースそれぞれの大きさ及び形状を同一に
しておく(同一規格にする)と、適宜各放流ベースを自由
に使い回しできて便利である。As in this example, if the basic configuration is a release base similar to the fish nest base (both are based on a fish collection case), the release base is integrated with the fish nest base in accordance with the growth of the child. As it acts as a fish reef, it can be left as it is without being collected. However, the present invention is characterized in that after sufficient growth of the pups, only the release base is collected for the next release and used for the next release. At this time, if the size and shape of each of the fish nest bases (or fish nest sites described later) and the fish discharge bases in the multiple baby breeding release structures are the same, and the same size and shape are used (to the same standard) It is convenient that each discharge base can be freely used as needed.

【００１８】図９は水中基礎１に魚巣部位19を設けた防
波堤(幼稚仔放流構造物)の一例を表す斜視図、図10は略
台形潜堤(幼稚仔放流構造物、全体が水没する水中基礎
１である)の一例を表す斜視図であり、図11は略平坦潜
堤(幼稚仔放流構造物、全体が水没する水中基礎１であ
る)の一例を表す斜視図である。本発明の幼稚仔放流構
造物は、上記例示の防波堤に限らない。基本的には、魚
礁作用を発揮する環境内に放流ベースを安定して配置
し、幼稚仔成長までの一定期間放流ベースの位置固定が
可能であればよい。これにより、図９〜図11に見られる
ような構成を例示することができる。説明の便宜上、各
図では水中基礎１を構成する岩塊図示を省略している。FIG. 9 is a perspective view showing an example of a breakwater (a kindergarten discharge structure) in which a fish nest portion 19 is provided on the underwater foundation 1, and FIG. 10 is a substantially trapezoidal submerged dike (a kindergarten discharge structure, the whole being submerged). FIG. 11 is a perspective view showing an example of a substantially flat submerged submersible (a kindergarten discharge structure, which is an underwater foundation 1 entirely submerged). FIG. The kindergarten release structure of the present invention is not limited to the breakwater described above. Basically, it is sufficient that the release base is stably arranged in an environment where the fish reef acts, and the position of the release base can be fixed for a certain period until the child grows. Thereby, the configuration as shown in FIGS. 9 to 11 can be exemplified. For convenience of explanation, the illustration of the rock mass constituting the underwater foundation 1 is omitted in each figure.

【００１９】図９に示す防波堤では、防波堤壁７に近い
側の前後２列に、魚巣ベースに代わる魚巣部位19を水中
基礎１と一体に設けている。魚巣部位19の構成は自由で
あるが、本例は直方体状にくり抜いた水中基礎１に貝殻
を充填し、上面を通水性ネット20で被覆した構造であ
る。部分的に、放流ベース５を嵌合可能な放流ベース嵌
合部15を設けてあり、放流ベース５は前記放流ベース嵌
合部15へ直接嵌め込み、幼稚仔の放流の用に供する。上
述の通り、岩塊等で構成した水中基礎も長期間を経るこ
とにより海藻の繁殖を許し、魚礁作用を発揮するが、集
魚ケースからなる魚巣ベースの方がより好ましく魚礁作
用を発揮する。そこで、本例の防波堤では、広い面積で
魚巣ベース相当部位を構成するため、直接水中基礎１に
魚巣部位19を形成しているわけである。In the breakwater shown in FIG. 9, fish nest sites 19 instead of fish nest bases are provided integrally with the underwater foundation 1 in two front and rear rows near the breakwater wall 7. Although the configuration of the fish nest portion 19 is free, this embodiment has a structure in which a shell is filled in an underwater base 1 hollowed out in a rectangular parallelepiped shape, and the upper surface is covered with a water-permeable net 20. A discharge base fitting portion 15 to which the discharge base 5 can be fitted is provided partially, and the discharge base 5 is directly fitted into the discharge base fitting portion 15 to be used for the release of the infant. As described above, the underwater foundation composed of rocks and the like also allows the propagation of seaweeds over a long period of time and exerts a reef effect, but a fish nest base formed of a fish collection case more preferably exerts a reef effect. Therefore, in the breakwater according to the present embodiment, the fish nest portion 19 is formed directly on the underwater foundation 1 in order to construct a portion corresponding to the fish nest base in a wide area.

【００２０】図10に示す潜堤は、例えば海流又は河川の
流速又は流量を抑制又は制限するために全体が水没する
水中基礎１のみで設けられるもので、この潜堤にも本発
明は適用しうることを示している。防波堤壁を有しない
点を除き、基本的な構成は図１以下の防波堤の例に準じ
る。また、図11に見られるような護岸等を主目的とした
略平坦潜堤でも、同様に本発明を適用しうる。これら潜
堤は、いずれも全体として幼稚仔の放流機能を付加した
築磯(つきいそ、一種の人工魚礁)として働くことにな
る。従来の人工魚礁と異なる点は、特定の構造物に対し
て魚礁作用を発揮させるのではなく、一定の範囲全体に
わたって、放流する幼稚仔の対する生育環境を提供でき
る点にある。これにより、育てる漁業としての目的をよ
りよく達成できるようになる。The submerged levee shown in FIG. 10 is provided only with an underwater foundation 1 that is entirely submerged in order to suppress or limit the flow velocity or flow rate of an ocean current or a river, for example. It indicates that Except that there is no breakwater wall, the basic configuration conforms to the example of the breakwater shown in FIG. In addition, the present invention can be similarly applied to a substantially flat submerged embankment mainly for revetment as shown in FIG. All of these submerged levees will work as Tsukiiso (a kind of artificial reef) with the function of releasing infants as a whole. The difference from the conventional artificial reef is that it does not exert a reef effect on a specific structure, but provides a growth environment for released larvae over a certain range. As a result, the purpose of raising fishery can be better achieved.

【００２１】[0021]

【発明の効果】本発明により、育てる漁業をよりよく実
現するために求められる幼稚仔の定着を達成し、効率良
い合目的的な幼稚仔の放流を可能にする。水中構造物は
主として防波や護岸を目的として構築されるものである
が、こうした場所はすなわち人が接近しやすい場所であ
り、こうした場所に定着する幼稚仔及び水棲生物の生息
環境があると、育てる漁業の観点からだけではなく、釣
り場として好ましいと言える。これまでの放流と異な
り、成長に従って必要となる水棲生物としての生息環境
を備えることで、幼稚仔放流構造物近辺(水没部位周辺)
を中心に魚又は貝が生息することが期待できる。このよ
うに、本発明の幼稚仔放流構造物は、単なる防波や護岸
目的のみならず、幼稚仔の放流、定着、そして育てる漁
業に貢献する効果を有する。Industrial Applicability According to the present invention, the establishment of larvae required for better realizing the raising fishery is achieved, and efficient and purposeful release of larvae becomes possible. Underwater structures are mainly constructed for the purpose of breakwaters and seawalls, but these are places that are easily accessible by humans, and if there are habitats for infants and aquatic organisms that settle in such places, It can be said that it is preferable not only from the viewpoint of raising fishery but also as a fishing place. Unlike the previous release, by providing a habitat as an aquatic organism that is required as it grows up, near the child release structure (around the submerged site)
It can be expected that fish or shellfish inhabit mainly. As described above, the kindling release structure of the present invention has an effect of contributing not only to the purpose of breaking off the seashore and seawalls, but also to the release, establishment and raising of the kindergarten fishery.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明を構成する防波堤の一例を表す斜視図で
ある。FIG. 1 is a perspective view illustrating an example of a breakwater constituting the present invention.

【図２】同幼稚仔放流構造物の水中基礎に嵌合する放流
ユニットの全体斜視図である。FIG. 2 is an overall perspective view of a discharge unit fitted to an underwater foundation of the same kindergarten discharge structure.

【図３】同放流ユニットの組み付け関係を表す斜視図で
ある。FIG. 3 is a perspective view illustrating an assembling relationship of the discharge unit.

【図４】魚巣ベースに対する放流ベースの嵌合関係を表
す斜視図である。FIG. 4 is a perspective view showing a fitting relationship of a discharge base with a fish nest base.

【図５】放流ベースの別例を表す斜視図である。FIG. 5 is a perspective view illustrating another example of the discharge base.

【図６】放流ベースの別例を表す斜視図である。FIG. 6 is a perspective view showing another example of the discharge base.

【図７】集魚ケースの構造を表す一部破断斜視図であ
る。FIG. 7 is a partially cutaway perspective view showing the structure of a fish collecting case.

【図８】別例の集魚ケースの構造を表す一部破断斜視図
である。FIG. 8 is a partially cutaway perspective view showing the structure of another example of a fish collecting case.

【図９】水中基礎に魚巣部位を設けた防波堤の一例を表
す斜視図である。FIG. 9 is a perspective view showing an example of a breakwater provided with a fish nest site on an underwater foundation.

【図10】略台形潜堤の一例を表す斜視図である。FIG. 10 is a perspective view illustrating an example of a substantially trapezoidal submerged embankment.

【図11】略平坦潜堤の一例を表す斜視図である。FIG. 11 is a perspective view illustrating an example of a substantially flat submerged embankment.

【符号の説明】[Explanation of symbols]

１ 水中基礎(水没部位) ２ 放流ユニット ３ 載置ベース ４ 魚巣ベース ５ 放流ベース ６ 集魚ケース ７ 防波堤壁 ８ 嵌合穴(嵌合枠) ９ 鋼製枠材 10 構造フレーム 11 岩塊 12 通水性ネット筒 13 貝殻 14 魚礁本体部 15 放流ベース嵌合部 16 スペーサ 17 ワイヤ 18 ブラシ状繊維束(素材) 19 魚巣部位 20 通水性ネット DESCRIPTION OF SYMBOLS 1 Underwater foundation (submerged part) 2 Release unit 3 Mounting base 4 Fish nest base 5 Release base 6 Fish collecting case 7 Breakwater wall 8 Fitting hole (fitting frame) 9 Steel frame material 10 Structural frame 11 Rock block 12 Water permeability Net tube 13 Seashell 14 Fish reef main body 15 Release base fitting part 16 Spacer 17 Wire 18 Brush-like fiber bundle (material) 19 Fish nest part 20 Water-permeable net

───────────────────────────────────────────────────── フロントページの続き (72)発明者 原 茂恭 岡山県倉敷市下庄２番地 Ｆターム(参考） 2B003 AA01 BB02 DD02 EE04 2B104 AA01 AA22 BA06 CA01 CB21 CB23 CB44 CD02  ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigeyasu Hara 2 Shimosho, Kurashiki City, Okayama Prefecture F-term (reference) 2B003 AA01 BB02 DD02 EE04 2B104 AA01 AA22 BA06 CA01 CB21 CB23 CB44 CD02

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 人工的に孵化又は育成した水棲生物の幼
稚仔放流から定着までの環境を提供する水中構造物であ
って、幼稚仔の出入りが可能な放流ベースを該水中構造
物の水没部位へ着脱自在に位置固定することを特徴とす
る幼稚仔放流構造物。An underwater structure that provides an environment from the release of aquatic organisms hatched or grown artificially to the establishment of the larvae, and a release base through which the larvae can enter and exit. A kindergarten release structure characterized in that the position is detachably fixed to the child. 【請求項２】 放流ベースは、魚礁作用を発揮する魚巣
ベースへ着脱自在に嵌合し、該放流ベース及び魚巣ベー
スを一体とした放流ユニットを構成してなり、該放流ユ
ニットを水中構造物の水没部位に位置固定する請求項１
記載の幼稚仔放流構造物。2. The discharge base is detachably fitted to a fish nest base that exerts a reef action, and constitutes a discharge unit integrating the discharge base and the fish nest base. The position is fixed at a submerged part of an object.
The release structure of the described kindergarten. 【請求項３】 放流ユニットは、水中構造物の水没部位
に設けた嵌合枠に嵌合する請求項２記載の幼稚仔放流構
造物。3. The structure of claim 2, wherein the discharge unit is fitted into a fitting frame provided at a submerged portion of the underwater structure. 【請求項４】 放流ベースは、水中構造物の水没部位に
形成した魚礁作用を発揮する魚巣部位へ着脱自在に嵌合
し、該水中構造物の水没部位に位置固定する請求項１記
載の幼稚仔放流構造物。4. The underwater structure according to claim 1, wherein the discharge base is removably fitted to a fish nest portion which exhibits a reef effect formed at a submerged portion of the underwater structure, and is fixed at a submerged portion of the underwater structure. A kindergarten release structure. 【請求項５】 魚巣ベースは、通水性ネットで構成した
容体に海藻の付着、繁殖を促す素材を充填した集魚ケー
スを単数又は複数組み合わせてなる請求項２記載の幼稚
仔放流構造物。5. The kindergarten release structure according to claim 2, wherein the fish nest base is composed of one or a plurality of fish collection cases filled with a material that promotes the adhesion and propagation of seaweed to a container formed of a water-permeable net. 【請求項６】 放流ベースは、通水性ネットで構成した
容体に幼稚仔が侵入する隙間を形成する素材を充填した
保護ケースを単数又は複数組み合わせてなる請求項１記
載の幼稚仔放流構造物。6. The structure of claim 1, wherein the discharge base comprises one or a combination of a plurality of protective cases filled with a material forming a gap through which the child enters the container formed by the water-permeable net.
JP2001063399A 2001-03-07 2001-03-07 Infant discharge structure Expired - Lifetime JP4391707B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001063399A JP4391707B2 (en) 2001-03-07 2001-03-07 Infant discharge structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001063399A JP4391707B2 (en) 2001-03-07 2001-03-07 Infant discharge structure

Publications (2)

Publication Number Publication Date
JP2002262705A true JP2002262705A (en) 2002-09-17
JP4391707B2 JP4391707B2 (en) 2009-12-24

Family

ID=18922398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001063399A Expired - Lifetime JP4391707B2 (en) 2001-03-07 2001-03-07 Infant discharge structure

Country Status (1)

Country Link
JP (1) JP4391707B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007082466A (en) * 2005-09-22 2007-04-05 Kaiyo Kensetsu Kk Fishing bank for cultivation aquaculture
KR101568827B1 (en) * 2015-06-02 2015-11-12 백녕건설 주식회사 Net-type fishing reef for growing a small fry
CN113229194A (en) * 2021-02-05 2021-08-10 贵州工程应用技术学院 Three-dimensional freshwater fish germplasm resource protection reef

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007082466A (en) * 2005-09-22 2007-04-05 Kaiyo Kensetsu Kk Fishing bank for cultivation aquaculture
KR101568827B1 (en) * 2015-06-02 2015-11-12 백녕건설 주식회사 Net-type fishing reef for growing a small fry
CN113229194A (en) * 2021-02-05 2021-08-10 贵州工程应用技术学院 Three-dimensional freshwater fish germplasm resource protection reef
CN113229194B (en) * 2021-02-05 2022-11-22 贵州工程应用技术学院 Three-dimensional freshwater fish germplasm resource protection reef

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