JP4947566B2 - How to create seaweed beds - Google Patents

Description

【００３０】
ところで、藻場造成において最も重要なことはその永続性であり、移植した海藻が長期に渡り繁茂状態を維持できるように計画する必要がある。このため、計画海域の適性調査では、特に消失しやすい夏季の高水温期（８〜９月）における適応性には十分に留意する必要がある。したがって、本発明における適性判断の基本的な考え方は、育成試験の基本条件として夏季の高水温期を経験させるとともに、越夏後の生長旺盛期（１０〜翌３月）における生育状態を確認することが望ましい。表１は、このような観点から各生長段階のツルアラメについて、育成試験の最適開始時期、育成期間および評価期間を示している。因みに、ツルアラメの場合には、検体４あるいは検体５の状態にある藻体を対象とし、夏季高水温期（８〜９月）中から試験を始めて翌年の３月まで観察するのが短期間（約８か月間）で評価することができる方法である。しかも、生長段階がそれよりも前の検体１〜検体３を用いる場合に比べて藻体が傷みにくいので、海上での組立作業における取扱いの面でも有利であり、また１年を通して試験を開始できる利点もある。上記観察期間は、この試験方法における基本条件ではあるが、適性調査の期間を十分に確保できない場合には、夏季の高水温期の少し前から越夏後までの経過でも判断できないことはない。なお、ツルアラメ以外の多年生海藻類についても基本的な考え方はこれと同様である。また、季節に関係なく１年生海藻類については、検体１あるいは検体２に相当する生長状態のものを試験開始時に使用すればよい。
【００３１】
図３は、評価用海藻担持具の異なる実施例の要部を示す部分断面図であって、図示の評価用海藻担持具１０Ａは、後述する移植用海藻担持具１０とその基本構成が共通するものである。図４は、その主要構成部材の一つである定着体２０の平面図である。この定着体２０は、適度な弾性を有する合成樹脂により一部が開放した帯状リング２１の外周面部分に、海藻種苗１１が着生している短尺の親縄１２を装着した構成になっている。そして、これら複数の定着体２０は、後述する帯状リング２１の連結手段として設けられた貫通孔に索条１４を通して連結するとともに、各定着体２０間には所定長さのパイプ等の筒体１５を介在させることにより、各定着体２０が一定の間隔で保持されるようになっている。なお、図示はしないが、索条１４の両端にアンカーと浮体が接続されることは前記実施例における評価用海藻担持具１と同様である。
【００３２】
上記の評価用海藻担持具１０Ａにおいて、定着体２０に装着された親縄１２は、ワカメ養殖などで広く行われている養殖法を利用して得られるもので、その表面には複数の海藻種苗１１が着生している。この親縄１２の製造方法は、まず海藻の生殖細胞（遊走子など）が浮遊している陸上の水槽内において、繊維質で海藻の生殖細胞の付着に適した適宜な採苗糸１３を浸漬してこれに海藻の生殖細胞を付着させて発芽させた後、その発芽した状態の種苗糸１３をそのまま親縄１２に螺旋状に巻き付けるか、あるいは所々への差し込みや結束などして海中に設置し、海藻幼体が適宜大きさになるまで育成したものである。この親縄１２の前記帯状リング２１への付設は、帯状リング２１の外側面に沿うようにして５個所の略Ｌ字状の受部２２に上方から嵌入すると、受部２２の先端内側に形成された突起２３により抜け止めがなされ、それと同時に受部２２に対向して設けられた突起２４により径方向の移動が阻止されるようになっている。さらに、帯状リング２１には、その一端側に鉤状突起２５が、また他端部２６には前記鉤状突起２５を受け入れて環状に連結保持するための掛止孔（図示せず）がそれぞれ設けられ、また円周上の３個所に連結手段としての貫通孔２７が設けられている。この場合、帯状リング２１の素材としてポリプロピレン等の水よりも比重の小さいプラスチックを使用すれば、その浮力と海藻種苗１１および親縄１２の比重とが釣り合い、リングの中心から離れた円周上の一個所すなわち重心から外れた位置で連結されていても水平状態が保持される。なお、円周上の複数個所で連結することはもちろん可能である。
【００３３】
また、図５は、本発明の藻場造成方法における評価用海藻担持具による育成試験の他の実施例である。ここでは、複数の評価用海藻担持具３０ａ、３０ｂ、３０ｃが藻場造成を計画している対象海域の互いに近い場所に設置されている。この場合、各評価用海藻担持具３０ａ、３０ｂ、３０ｃの基本構成は図３および図４に示すものと同様なものが使用され、海藻種苗は帯状リング３１上に保持されるが、各帯状リング単位で海藻種が異なっている。因みに図の例では、評価用海藻担持具３０ｃにおける海藻種苗３２ｃは、当該場所では比較的浅い水深に置かれたときによく生育することがわかり、評価用海藻担持具３０ａにおける海藻種苗３２ａは、むしろ深い水深のほうが適していることが推測できる。また、評価用海藻担持具３０ｂで用いた海藻種苗３２ｂは、いずれの水深においてもあまり成長が見られないことから、この場所には適さないと判断することができる。このような結果に基づき、海藻種の選択と造成用構造物を設計すればよい。例えば、コンブ科海藻による藻場造成を計画している場合には、アラメ、カジメ、クロメ、ツルアラメなどを適宜組み合わせて試験を行えばよい。また、特定の海藻にこだわることなく当該場所に適した海藻種を選定する場合には、前記コンブ科海藻に加え、ホンダワラ、アカモクおよびオオバモクなどのホンダワラ科に属する褐藻類、マクサやオバクサなどのテングサ科に属する紅藻類、ヒトエグサ、アオサなどのアオサ科に属する緑藻類を適宜組合せればよい。このように試験用の海藻種をそれぞれ異ならせた複数の評価用海藻担持具を互いに近い場所に設置した場合には、各評価用海藻担持具における個々の海藻の水深に対する生育状態の比較に基づく知見に加え、環境適応性に差がある異なる海藻種同志の比較も可能であることから、対象海域における海中環境のより詳細な情報が得られ、藻場造成計画の実現に大きく寄与する。この場合には、試験用の海藻を試験開始前に良好な状態に保持することができ、実質的に同じ保管状態の海藻を用いて試験を始めることが可能になる。さらに、個々の帯状リング３１では、複数の同じ生長段階にある海藻種苗が水深に対して水平方向に広がった状態で設置されることから、各水深ごとの検体数が多くなり、それぞれの水深における海中環境を面として把握することができ、藻場造成の適性判断を行う上で好都合である。
【００３４】
そして、上記のような手段で計画海域の適性評価を行い、施工条件等を設定した後、図６に示すように、藻場造成に必要な数の移植用海藻担持具１０を適性と判断された計画海域Ｓの海底に設置する。この場合、移植用海藻担持具１０は、図３，４に示す評価用海藻担持具と同じ構成のものが使用されているが、その目的からすれば、評価用海藻担持具のように海藻種苗１１が必ずしもすべて同じ生育段階である必要はなく、その生育段階も成体に近いもののほうが好ましい。そして、定着体２０上の海藻種苗１１が移植に適した状態になるまで適宜の期間にわたり育成あるいは養生作業を行う。なお、この実施例ではアンカー２８に砂袋が使用され、それらが造成計画により設定した造成用構造物の沈設予定位置に配置されている。この移植用海藻担持具１０は索条１４の下端側のみが固定され、その下端を支点として索条１４全体が自在に揺動する構造になっているため、ウニ等の食植性動物がこれに付着しにくく、育成・養生を行っている間に海藻種苗１１が食害を受け難いものになっている。さらに、流れの抵抗となる海藻種苗１１の葉状部分に力が集中しにくく、設置場所の流れが速い場合であっても、移植用海藻担持具１０に保持されている海藻種苗１１が破断して流出することは少ない。したがって、育成・養生期間中での海藻種苗１１の損失が僅かであると同時に、海上の養殖施設を利用することなく海藻種苗１１を計画海域Ｓの海中環境に確実に適合させることができる。なお、これら移植用海藻担持具１０の設置場所は、必ずしも計画された施工対象区域に限定されることはなく、海中環境が近いその周辺区域あるいはその他の場所であってもよい。
【００３５】
上記の育成・養生作業が終了すると、図７に示すように、ダイバーＡが移植用海藻担持具１０の索条１４を下端側において砂袋２８から分離し、索条１４の上端側に浮体２９を付けたまま海藻種苗１１付きの定着体２０を海上に待機している台船（図示せず）に運ぶ。したがって、海底には砂袋２８が残置されることになる。
【００３６】
一方、計画海域Ｓの海面上には、図８に示すように複数の造成用構造物５０を搭載した台船４０が待機している。この造成用構造物５０は、平面視矩形状のコンクリート基盤５１の各隅部近くに円形の柱体５２が立設された柱状構造になっている。そして台船４０上では、海中からダイバーＡが回収した連結状態にある海藻種苗１１付きの定着体２０を作業員Ｂが索条１４から取り外し、それぞれを造成用構造物５０の柱体５２に所定の間隔で嵌着する。次いで、コンクリート基盤５１の上面に予め植設した吊下げ用フック（図示せず）にワイヤー４３を掛けてクレーン４１により海底に下ろす。海底で待機していたダイバーＡは、台船４０上の作業員と協働し、海底に残置されている砂袋２８を目印として下りてきた造成用構造物５０の設置位置を調整する。それが完了すると、ワイヤー４３を造成用構造物５０から外す。台船４０の上では、ワイヤー４３が外されたことを確認すると、クレーン４１のフック４２を巻き上げ、次の沈設作業に備える。これら海中からの海藻種苗１１の回収、台船４０上での造成用構造物５０に対する取付および沈設作業を、海中と台船４０の上で繰り返すことにより、効率的に海藻種苗１１の装着作業と造成用構造物５０の沈設作業を行うことができる。なお、本発明においては、多数の評価用海藻担持具を計画区域に設置し、それらが良好な生育状態を示した場合には、それらをそのまま残置して移植用海藻担持具として利用することも可能である。したがって、状況によっては別途移植用海藻担持具の投入を省略することもできる。
【００３７】
このように、本発明で用いる移植用海藻担持具１０は、海藻種苗１１が一体になっている定着体２０の帯状リング２１を主体として取り扱うため、その組立てからその後の育成・養生作業における取扱いが容易である。特に、柱状構造の造成用構造物５０を対象とする場合には、柱体５２に対して海藻種苗１１を簡単かつ確実に固定することができる。このため、定着体２０と一体になった海藻種苗１１は、良好な状態で造成用構造物５０に取り付けることができるから、その後の成長が確かなものとなり、藻場造成の成功率向上に大きく寄与する。上記実施例において、柱状部５２の長さは４ｍ前後が好適であるが、設置場所の水深、使用する海藻種苗の種類等によっては適宜変更するものである。なお、図示はしないが、造成用構造物５０の周囲が砂地のままであるよりは、捨て石等の海藻の着生床となり得るものを設置がするほうが、海藻の生育密度を高める上で好都合である。そして、上記構成の造成用構造物５０に定着体２０を介して取り付けられた海藻種苗１１が成熟すると、周囲に無数の遊走子を放出し、それらが近くにある造成用構造物５０や捨て石などの表面に付着する。ここに着生して成育した海藻は、同様に遊走子を放出する。これが繰り返されることにより、次第に海藻の生育範囲が拡大し、藻場が形成される。実施例では、造成用構造物５０の柱体５２が鉛直方向に立設されていることから、造成用構造物５０の周囲が砂地の場合、柱体５２に着生した海藻種苗１１は、巻き上げられた砂による影響を受けにくく、造成用構造物５０の多少の埋没に対してもそれら海藻が残存する確率が高いことから、これら構造物を中心とする藻場の永続性は高い。なお、実施例では、すべての柱体５２に複数個の定着体２０を取り付けた事例について説明したが、一部の柱体５２のみに取り付けることは何ら支障はなく、その数の増減や取付位置の変更はもちろん可能である。
【００３８】
因みにツルアラメによる藻場造成の場合、計画海域の適性判断から施工までを最短期間で行うには、次のような手順が想定される。すなわち、評価用海藻担持具を用いた育成試験は、６月頃から９月頃までの４ヶ月間を対象として実施し、移植用海藻担持具による海藻種苗の育成・養生は、開始時における海藻種苗の生育段階にもよるが、９月から１２月頃までが対象期間となる。したがって、この場合には最短で１年以内に計画海域の適性判断から、その結果に基づく施工を完了させることも可能である。
【００３９】
また、図９は他の施工例であって、海藻種苗１１が一体になっている定着体２０の異なる取付方法を示すものである。図８の実施例では、台船４０上において各定着体２０を造成用構造物５０の柱体５２の所定位置に予め固定しているが、この場合には台船４０上で各柱体５２の下端部分（基部）にそれぞれ複数個ずつ積み重ねるようにして嵌挿（仮止め）した状態で沈設した後、海中で所定位置に固定するものである。すなわち、海中のダイバーＡは、各柱体５２の下端部分にある海藻種苗１１付きの定着体２０を、そのまま纏めて上方に移動しながら柱体５２の下部から上部に向けて順次所定位置に固定する。この方法では、前記に比べて台船４０上での作業時間が短く、海藻種苗１１に対するダメージがより少なくなる。さらに、図示はしないが、アンカー２８から分離した索条１４と海藻種苗１１付きの定着体２０を台船上に上げることなく沈設場所の近くの海底に設けた貯留用アンカーに一時的に係止しておき、随時そこから造成用構造物５０に移すようにしてもよい。
【００４０】
次に、図１０は評価用海藻担持具１と同様な手段で索条６１に海藻種苗６２が適宜の間隔で取り付けられた移植用海藻担持具６０を、そのままの状態で利用する実施例である。この場合、評価用海藻担持具１により計画海域の適性を確認するまでは前記と同様である。この移植用海藻担持具６０は、造成用構造物５０の沈設予定位置を考慮した適宜の場所にアンカー６３が位置するようにを設置し、海藻種苗６２の育成または養生を行う。そして、それが済んだ段階で造成用構造物５０を所定の位置に沈設するものである。ここでは、移植用海藻担持具６０上で成熟した海藻種苗６２から放出される遊走子は、基盤５１に立設された柱体５２に捕捉されやすく、次第に造成用構造物５０の全体に広がっていく。かかる実施例において、遊走子の付着とその後の生育を助ける上で前記のような養藻塗料を構造物表面に塗布すると好適である。
【００４１】
なお、移植用海藻担持具と組み合わせて使用する造成用構造物は、上記各実施例では矩形状基盤に円柱を立設した構造物を例に説明したが、もちろんこれに限定されるものではない。柱状構造物における基盤形状としては、十字形、三つ又状、六角形など適宜形状のものが選択可能であり、柱体の形状についても円柱の他に多角柱でもよく、その場合には当該柱体に固定される定着体の形状もそれに応じて多角形に形成されることは言うまでもない。さらに、柱状構造以外で例えば格子枠状に形成されたいわゆる並型漁礁その他各種形状・素材の構造物が適用可能である。また、移植用海藻担持具として、一般の海藻養殖で行われているはえ縄式のものを採用するなど、その形状や設置場所等も含め、本発明の技術思想内での種々の変更実施はもちろん可能である。
【００４２】
【発明の効果】
以上説明したように、本発明による藻場造成では、評価用海藻担持具を用いて計画海域の適性評価を行い、その結果に基づいて適宜の移植用海藻担持具を対象区域（計画海域）またはそれに海中環境が近い周辺の区域に設置して移植用海藻を海中環境に馴らし、それらを生育基盤となる造成用構造物と組み合わせて対象区域に設置するものであるから、経済的にかつ高い成功率で藻場造成を実現でき、しかも施工が容易であるなど、その実用上の効果はきわめて大である。
【図面の簡単な説明】
【図１】 本発明において使用する評価用海藻担持具による育成試験中の状態を示す説明図である。
【図２】 図１の評価用海藻担持具における海藻の取付状態を示す拡大図である。
【図３】 評価用海藻担持具の異なる例の要部を示す部分断面図である。
【図４】 評価用海藻担持具あるいは移植用海藻担持具で使用する定着体の平面図である。
【図５】 本発明における評価用海藻担持具を用いた育成試験の他の実施例を示す説明図である。
【図６】 本発明における移植用海藻種苗の育成または養生中の状態を示す説明図である。
【図７】 育成または養生が済んだ移植用海藻種苗の回収状態を示す説明図である。
【図８】 造成用構造物の沈設状態を示す説明図である。
【図９】 本発明による藻場造成方法の他の実施例を示す説明図である。
【図１０】 本発明による藻場造成方法の他の実施例を示す説明図である。
【符号の説明】
１，１０Ａ，３０ａ，３０ｂ，３０ｃ…評価用海藻担持具、２，２８，６３アンカー、３，１４，６１…索条、４，２９…浮体、５，１１，３２ａ，３２ｂ，３２ｃ，６２…海藻種苗、１０，６０…移植用海藻担持具、２０…定着体、４０…台船、５０…造成用構造物、５１…基盤、５２…柱体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the construction technology of seaweed beds (also referred to as underwater forests), mainly seaweeds, which bring about the propagation of seafood and contribute greatly to the improvement of the marine environment. It is related with the seaweed bed construction technique which can be formed with a high success rate by a simple means.
[0002]
[Prior art]
Currently, the promotion of coastal fisheries is an important issue in Japan, and the growth and aquaculture of seafood and seaweed are being promoted. However, in the coastal areas, seaweed beds disappear due to various causes, and the seafood that uses the seaweed baths as a place of life is drastically reduced. ing.
[0003]
Seaweeds generally grow on the relatively shallow rock surface of the seabed and propagate there. However, the seaweeds are environmentally friendly because there are often no maternal groups that are the source of zoospores nearby, and the surface of the rock that forms the bed is often covered with lime algae. However, the situation is extremely difficult to settle. In addition, seaweeds are originally difficult to grow in sandy mud. Therefore, it is important to try to introduce seaweed from the outside in the regeneration of the seaweed beds in such a seawater-burning sea area and the construction of seaweed beds in the sand mud sea area.
[0004]
Conventionally, as a method for creating a seaweed bed, a structure such as a concrete block (referred to as a “building structure” in the present specification) with various devices that can function as a seaweed growth base is installed. A general method is to wait for the seaweed to naturally grow on the surface of the structure. However, these conventional methods depend on natural establishment through zoospores, so that the establishment of seaweed in the early stage of development is not only greatly influenced by uncertain natural factors, but also in the establishment of seaweed beds. There are fundamental problems in terms of creation efficiency and certainty, which takes time, and there are many cases in which these construction structures are not effectively utilized.
[0005]
Therefore, by using seeds and seedlings used in wakame culture, a thin twisted yarn with seaweed juveniles previously wound around a construction structure such as a concrete block and submerged in the sea, it is used for seedlings. Attempts have been made to establish a prosperous state through zoospores that settle on the surface of the structure and are released from mature seaweed there. However, this conventional method is not only difficult to fix the seed and seedlings to the construction structure, but is also unstable in the state after the attachment, and is applied to the construction structure already installed in the sea. It was almost impossible. In addition, even after installation, if there is any problem with the fixed state of the seed and seedlings with respect to the construction structure, the seeds and seeds that are thin and unstable in shape, the deterioration of the fixed state expands from the problem location, There was a drawback that it would easily fall off. In particular, there is a restriction that seaweed seedlings must be handled at a very small stage because the seedling thread itself has little strength. For this reason, the success rate of the creation was low, for example, the formation on the surface of the construction structure was not reliable and the subsequent growth was often unsatisfactory. Therefore, there are many problems with the above-described method of applying seedlings and seedlings as they are, and the actual situation is that they have not been put into practical use as means for transplanting seaweed seedlings. Against this background, there are many construction structures on the coast that have not been utilized as a base for the growth of seaweed, and in recent years there has been a growing demand for a highly successful algae bed construction technique.
[0006]
Therefore, as a result of studying the handling of the seaweed for transplantation and the shape of the structure for construction, the present applicant has found that the seaweed seedling seedling is supported by a ring-shaped fixing body made of an appropriate elastic material such as a synthetic resin. Prepare a ring with a ring in advance and attach it to the pillar part of the columnar structure for construction to ensure the growth of seaweed for transplantation to the place and ensure a good growth environment. Techniques have already been proposed for creating seaweed beds based on established seaweed seedlings (see Japanese Patent Laid-Open Nos. 10-136913 and 2000-139267). In the seaweed bed construction by combining this columnar structure and a ring with seaweed seedlings, the use of a fixing ring makes it easy to attach seaweed seedlings to the construction structure, and also has the advantage of stabilizing the subsequent mounting state. is there. In particular, since these transplanted seaweeds are fixed to columnar portions arranged almost vertically in the sea, the seaweed seedlings that will be the mother algae are greatly improved over the conventional method in terms of the growth environment, and good results are achieved. Has been obtained. That is, in this method of introducing seaweed seedlings for transplantation into the sea by attaching an appropriate number of seaweed seedling carrying tools to the columnar part of the construction structure, the amount of introduction per unit area of the sea area at the time of creation is easily increased. The core structure of the seaweed basin, such as that the seaweed seedlings installed in the columnar part are well distributed with oxygen and nutrients, and that the growth conditions of the seaweed against the depth of the seaweed are easy to satisfy and are not easily affected by food damage or sand drift. There are many advantages over the previous ones.
[0007]
[Problems to be solved by the invention]
By the way, as mentioned above, the matters related to the structure such as the shape of the structure for building seaweed growth and the means for fixing the seaweed seedlings for transplantation are as follows: While this is an important factor that has a significant impact on the success rate, it is also essential to fully understand the underwater environment of the target sea area. Therefore, when constructing, it is fundamental to conduct a thorough preliminary survey on physical, chemical and biological environmental factors in the sea area using various measuring instruments. In the above data collection, the more measurement items and measurement points, the more advantageous it is to grasp the environmental characteristics in the sea, but this requires expensive measurement equipment and advanced analysis technology, leading to an increase in survey costs. There was a big problem. In addition, the suitability judgment of the planned sea area is a prediction based on various measurement data relating to the environmental factors as described above, and thus it does not mean that the growth of the target seaweed has been confirmed. Therefore, in the actual construction, the expected results may not be obtained due to unexpected factors, and the reliability is not always sufficient.
[0008]
In addition to the above-mentioned proposed technique of the present applicant, in the conventional seaweed bed construction technology using seaweed for transplantation, the seaweed seedling collection site or its production place to be introduced at the time of construction is different from the construction target sea area. It is customary. Therefore, the growth environment of both of them for seaweed seedlings is fundamentally different apart from the degree. It cannot be denied that this difference in the growth environment has an influence on the establishment rate of the seaweed seedlings after transplanting.
In particular, when a young seedling in the middle of growth is applied, the effect appears greatly. Therefore, as a means of adapting the seaweed seedlings introduced from the outside to the underwater environment of the target sea area in advance, it can be suspended in the sea using local aquaculture troughs and cultivated or cured for an appropriate period. It is considered effective to install an aquaculture facility in the vicinity. However, the cultivation and curing work on the sea bream provided on the surface of the sea is unavoidable due to the influence of weather, so seaweed seedlings are lost or washed away due to stormy weather, and it is performed in a limited space. There is a problem that seaweed seedlings that are cultivated and cured in an optimal state cannot be prepared in the necessary amount when necessary, such as seaweed seedlings being rubbed against each other, and in addition, there is also the troublesome management of seaweed seedlings . In addition, there is a problem of ship navigation in the case of sea surface use, which is often restricted compared to underwater use and is difficult to use. Under such circumstances, there are many cases where construction is not carried out without sufficient curing, and this has been one of the factors that reduce the success rate of seaweed bed construction.
[0009]
Therefore, the present applicant has arrived at the present invention as a result of intensive studies on a series of operations from the preliminary survey of the planned sea area in the construction of the algae basin to the construction of the construction structure. That is, in the present invention, the suitability of the planned sea area is determined easily and accurately, and the seaweed seedling for transplantation can be obtained by a simple means. Planned sea area determined to be appropriate (hereinafter sometimes simply referred to as “planned sea area”) It is an object of the present invention to provide a method for constructing a seaweed bed that can be proliferated in a construction structure or the like with a high probability by adapting it to the marine environment and utilizing it as a mother alga.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the seaweed bed construction method according to the present invention is obtained by attaching seaweed seedlings at substantially the same growth stage to a plurality of places at predetermined intervals along the longitudinal direction of the rope connecting the floating body and the anchor. After installing the seaweed carrying tool for evaluation in the almost vertical state on the seabed of the planned sea area, and confirming the suitability of the seaweed seedling seedlings placed at different depths as the seaweed formation area, Based on the observation result of the seaweed carrying tool for evaluation with respect to the ropes held at a predetermined position in the sea type A seaweed carrying device for transplantation comprising a plurality of selected seaweed seedlings selected in the above-mentioned planned sea area where suitability has been confirmed or in other areas where the underwater environment is similar to the planned sea area. By attaching the seaweed seedling to the transplanted seaweed carrying tool, the seaweed seedlings can be adapted to the underwater environment of the planned sea area and installed in the planned sea area where the suitability has been confirmed together with an appropriate structure for construction. It is characterized by the growth of seaweed around the seaweed seedlings.
[0011]
The seaweed carrying tool for evaluation used in the present invention is an appropriate length of rope selected according to the depth of the planned sea area, etc., seaweeds in the same growth stage of the kind selected in advance, all in the longitudinal direction or A part is attached to a plurality of places at regular intervals, and an anchor and a floating body are connected to the end. With this configuration, each seaweed on the rope grows according to the underwater environment at the depth where it is placed, so when an appropriate period of time has passed, the seaweed that was initially the same size is the same. Differences in the growth state occur depending on the depth of water placed on the rope, and differences in the marine environment appear in a form that can be visually observed as phenomena such as differences in algal body length and disappearance. Therefore, if the seaweed carrying device for evaluation is pulled up as needed or submerged in the sea, the individual growth of seaweed placed on the rope is observed over an appropriate period, and changes in their growth are compared. Therefore, it is possible to accurately determine the underwater environment at each depth of the target sea area without using an expensive measuring device.
[0012]
In the above seaweed carrying device for evaluation, the distance between each seaweed on the rope varies depending on the type of seaweed, the growth stage of the seaweed used at the start of the test, and the test period. It is desirable to open it in advance to the extent that no shadow is formed on the seaweed. Further, considering that there is a water depth range suitable for the growth of each seaweed species, an interval of about 1 to 5 m is generally preferable. In places with high transparency, the change in the light environment with respect to the water depth is small, so it is possible to increase the interval between seaweeds and reduce the number of specimens attached to the seaweed carrier for evaluation. Planning to create a seaweed bed The interval may be selected appropriately according to the conditions of the sea area. Also, plan Depending on the area of the sea area and its topography, etc., it is desirable to install evaluation seaweed carrying tools using the same seaweed species in various places in the planned sea area, and compare the changes in the growth status at multiple places. Will further improve the reliability of the aptitude judgment and lead to an improvement in the success rate of seaweed beds.
[0013]
In addition, the seaweed in the seaweed carrying tool for evaluation may be attached to a plurality of attachment points instead of one individual, and in this case, the number of specimens is increased by that amount, so that the accuracy of suitability determination is increased. In addition, if the floating body comes out on the sea surface as a length that matches the water depth of the installation location, the floating body can also be used as a mark indicating the installation location when investigating the growth of seaweed, Rather, the floating body is preferably in the sea. That is, in the present invention, since the sea environment at each depth of the installation location is to be grasped based on the change in the growth of seaweed placed at each position, the ropes placed in the sea should be as vertical as possible, It is desirable to keep the depth of each seaweed attached there as little as possible. For this reason, it is preferable that the position of the floating body is stopped at an appropriate position below the sea surface that is not easily affected by waves. In addition, if a rope having a length close to the water depth at the installation site is used, it can be set freely within a range from a shallow water depth near the sea surface to a deep water depth near the sea floor. Based on the observation results of the seaweed carrying tool for evaluation, the type of seaweed to be transplanted and its growth stage, the shape and dimensions of the construction structure that forms the basis of seaweed growth, and other construction conditions are formulated. In addition, prepare the required number of seaweed carriers for transplantation.
[0014]
Next, the seaweed carrying tool for transplantation is basically the same configuration as the seaweed carrying tool for evaluation, Depends on the seaweed carrier for evaluation Aptitude test result Based on Planned sea area Seaweed seedlings selected as seaweed species suitable for the above are attached to the cords at appropriate intervals. These transplanted seaweed carriers are Planned sea areas where suitability has been confirmed Or, after setting up in the sea in other sea areas close to the target area such as the surrounding area, cultivate or cure the seaweed seedlings on the ropes for a suitable period while confirming the growth state To be in a state that can be adapted to the underwater environment of the planned sea area. . Then, after the growth or curing is completed, the seaweed seedlings are attached at appropriate positions on the construction structure as a growth base. Planned sea area Then, the seaweed seedlings that have grown there mature and release zoospores, and gradually grow seaweed on and around the construction structure. Also, Planned sea area When the seaweed seedlings are nurtured and cured in the plant, the transplanted seaweed carrying tool should be kept as it is and the appropriate construction structure should be installed in the vicinity of the transplanted seaweed carrying tool. Is also possible. Also in this case, zoospores are released from the seaweed seedlings matured on the transplanted seaweed carrier, and the seaweed grows in the construction structure or the like as described above. That is, Planned sea area Or use the underwater such as the surrounding area where the underwater environment is similar Beforehand Transplanted seaweed Further By raising or curing, the seaweed seedling for transplantation is the place of construction Planned sea area It will be well adapted to the underwater environment. Moreover, it is possible to select alga bodies having a good growth state in the process of breeding and curing. And since the seaweed seedling of the optimal growth state is combined with an appropriate structure for construction, the structure for construction is reliably utilized as a growth base, and seaweed grows smoothly on the surface of the structure for construction. This becomes the core structure in the seaweed bed, and a permanent seaweed bed can be created with a high success rate. In addition, the seaweed seedlings for transplantation can be raised or cured without using the sea surface. Planned sea area Therefore, the seaweed seedlings necessary for creation can be prepared easily and reliably in an optimal state. Moreover, if it is nurtured and cured near the site where the construction structure is set up, it can be used at any time after the cultivation or curing is completed, so select the construction conditions such as the construction time of the construction structure. The degree of freedom is high, and there is little damage to seaweed seedlings when combined with the construction structure.
[0015]
In addition, the transplanted seaweed carrying tool having such a configuration can swing the rope with respect to the flow in the sea, and the transplanted seaweed seedlings attached thereto are held substantially in a floating state so that the entire algal body is kept. Since it swings greatly, fertile animals such as sea urchins and turban shells are difficult to crawl on seaweed seedlings during breeding or curing, and are not susceptible to food damage by these organisms. Moreover, since the whole alga body is floating, Planned sea area However, even in the place where the flow is fast, the local force that leads to the break-out of the seaweed seedlings is difficult to concentrate on the foliate. For this reason, it is convenient when selecting a seedling seedling seedling for transplantation.
[0016]
In addition, Planned sea areas where suitability has been confirmed When a seaweed seedling for transplantation suitable for the undersea environment at the construction site is attached to the construction structure by growing and curing in the sea, etc., as an attachment form, for example, only the anchor is separated. Each seaweed seedling attached to the rope is fixed to a part of the construction structure at the end of the rope, or each seaweed seedling is removed from the rope and constructed separately. You may fix to the appropriate place of the thing. In addition, the seaweed seedling is attached at a time when the transplanting seaweed carrying tool is pulled up on the carriage to separate the seaweed seedlings, and after fixing them to an appropriate place in the construction structure, the construction structure is sunk, or A diver may perform attachment work in the sea after installing the building structure at a predetermined position on the seabed, and the attachment form and attachment time of these seaweed seedlings are not particularly limited. Furthermore, the seaweed seedlings for transplantation are not limited to those produced by aquaculture but may be naturally collected, and seedlings and seedlings of different growth stages can be used in combination.
[0017]
Further, in the present invention, the anchor of the transplanting seaweed carrying tool is a sand bag, which is placed at the planned setting position of the constructing structure to grow or cure the transplanting seaweed, before the constructing structure is set up Alternatively, the sandbags may be left behind by separating the ropes. In this case, the left sand bag can be used as a mark of the setting position of the building structure, and the setting work can be performed efficiently. In particular, the target Planned sea area However, in places such as sand, even if the building structure is installed on a sand bag, it will be easily buried, so it will not interfere with the installation.
[0018]
Further, in the present invention, the seaweed seedling of the transplanting seaweed carrier is a cultured seedling that is integral with the fixing body, and may be attached to the rope and the constructing structure via the fixing body. This also leads to improved workability. This fixing body, when attaching the seaweed seedling for transplantation to the construction structure, facilitates the work by interposing it so that the seaweed seedling can be securely fixed at a predetermined position in a good state. It is a thing.
[0019]
In addition, it is possible to use the seaweed seedlings united with this fixing body also in the seaweed carrying tool for evaluation. In this way, when applying the seaweed seedlings in an integrated state with the anchor body, in the assembly work of the seaweed carrier, handling of the seaweed seedlings becomes easy, there is little damage to the alga bodies before the start of the test, and the same state There is an advantage that the test can be started using seaweed seedlings in the area. The attachment to the striated wire via the anchoring body is particularly effective when a seaweed seedling at a growth stage with low resistance such as a juvenile is used. The seaweed seedlings for evaluation used in the present invention may be either naturally collected or cultured seedlings, and the growth stage at the start of the test is not particularly limited, but is in the same growth stage. Cultured seedlings are desirable in terms of easy procurement of seaweed. The seaweed may be attached to the ropes at sea just before settling, or it may be submerged in the sea after installing the seaweed carrier body, and the seaweed can be damaged as much as possible immediately before the start of the growth test. It is desirable to perform under conditions that do not apply.
[0020]
As the fixing body, for example, in the case where the structure for building a columnar structure already proposed by the present applicant is targeted, a flexible material such as a synthetic resin is used, and one place is open. Formed in an annular shape and can be attached to the columnar part from the lateral direction by widening the open end, and the same material is formed in a substantially strip shape, and its peripheral surface when attached to the columnar part It is preferable to use a ring that is attached in a ring shape along the ring, or an endless ring that is inserted from the upper end of the columnar part. In order to integrate the seaweed seedling for transplantation into these fixed bodies, there are the following methods.
[0021]
For example, by applying a method generally used in seaweed aquaculture, seedlings suitable for the attachment of seaweed zoospores such as Cremona (trade name) are immersed in a water tank where seaweed zoospores float and seaweed migration After seedling and germinating the seedlings, the seedlings are attached as they are, for example, by spirally wrapping them around a rope-like or hose-like string-like body, and this is placed horizontally or suspended in the sea. And the like until the temporary roots of seaweed juveniles adhere to the string-like body and grow up to an appropriate size enough to withstand transplantation. Then, the long string-like body may be cut to an appropriate length according to the size or shape of the fixing body and attached to the fixing body. Here, when the structure for forming the columnar structure is a target, the string-like body is fixed to the fixing body by, for example, attaching a plurality of hook-shaped portions on the surface of the fixing body that is outside when the fixing body is attached to the columnar section. They can be integrated by forming them at a predetermined interval and fitting them inside, or by using a separate fastener to bind the fixing body and the string-like body together.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, it is planned using the seaweed carrying tool for evaluation. Ocean The suitability of the area is evaluated, and an appropriate seaweed carrier for transplantation is Planned sea areas where suitability has been confirmed Alternatively, it can be installed economically at a high success rate by installing it in a similar place in the marine environment, such as the surrounding area, and adapting the seaweed for transplantation to the marine environment, and by constructing a construction structure for its growth. Create a site. Here, the seaweed seedlings attached to the ropes of the evaluation seaweed carrying device and the transplanting seaweed carrying device are held in a swingable state in the sea, so during the aptitude test or the breeding / curing The leafy part of the alga body is effectively used with little loss due to damage or breakage. In addition, although a string-like body such as a rope is suitable as the rope, a hollow body such as a hose may be used, and the material and shape thereof are not particularly limited.
[0023]
In both the above seaweed carrying tools, the seaweed seedlings to be attached to the ropes can be applied to algal bodies in any growth stage from juveniles immediately after germination to adulthood. It may be a precursor of seaweed such as a spore body in the previous stage. When this precursor is used, for example, the precursor is attached to the seedling yarn in an onshore water tank to form a seedling yarn, and the seedling yarn is cut to an appropriate length, and a suitable band such as a binding band is fixed. It can be attached to some parts of the rope via means. Further, when a seaweed seedling for evaluation or transplantation having a size larger than that which can be grown in the state of the seedling thread is applied, the seedling thread is further grown in a state of being attached to a large-diameter rope or the like. Then, this thick rope or the like in a state where seaweed has grown is cut to the required length in the same manner as the seed and seedling thread, and attached to the rope through the rope or the like, or the ring as described above It may be attached to a fixing body such as a shape, and attached to the rope via the fixing body in this integrated state.
[0024]
As the kind of seaweed used in the present invention, those for aptitude evaluation and transplantation may be the same or different, and specific examples include brown algae, red algae, and green algae. Basically, the seaweed species that are the core of the planned seaweed beds are desirable, but not necessarily limited thereto. Among them, the seaweeds such as arame, scallop, and black seaweed have high food value, and are often used as seaweed species for seaweed development, and are suitable as seaweed species for transplantation in the present invention. It can also be used for evaluation. Among these seaweed seaweeds, pickled arame is particularly suitable. In other words, the pickled sea turtle has a greater adaptability to the water depth than other seaweed seaweeds, so when it is used as a seaweed species for evaluation, it is possible to investigate a wide range of water depth with a kind of seaweed, and at the start of the test The body is easy to handle, has excellent adaptability to high water temperatures, and is stronger than other seaweed species. Therefore, when a test is conducted with pickled peas and the growth state is not good, it can be judged that it is difficult to create a seaweed bed by other seaweeds. Furthermore, there is an advantage that the growth is fast and the growth status can be easily confirmed. In addition, the vine larva can be applied in the state of the root of which the leaf-like portion has been removed. In this case, if the growth environment is appropriate, new buds will appear after installation, so the leaf-like portion of the algal body is large. It is much easier to observe than to see the change over time. The pickled lime having such characteristics is excellent not only for evaluation but also as a seaweed species for transplantation. The size of the seaweed seedling for transplantation when it is attached to the seaweed carrier varies depending on the type of seaweed, construction time, environment of the creation area, etc. In this case, about 10 cm or more is desirable. Of course, the seaweed seedlings for transplantation used here are not limited to the seaweed seaweeds, and other seaweed species such as Honda walla depending on the purpose of seaweed development, such as when focusing on the role of seafood as a spawning place But it can be widely applied.
[0025]
Furthermore, in order to increase the adhesion of zoospores supplied from the seaweed seedling supporter to the structure for building seaweed growth base, and to make the subsequent growth more reliable, the algae coating is applied to the surface of the structure. It is desirable to apply. The algae nourishing paint in this case may be a paint containing a general chemical fertilizer, and among them, a water environment improvement paint comprising the photosynthetic bacteria proposed by the applicant, porous particles, and nutrient components of the photosynthetic bacteria ( (See Japanese Patent No. 3175964). When this paint is applied, it is possible to maintain a high growth rate of seaweeds and stably supply nutrients necessary for seaweed growth over a long period of time.
[0026]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a state during a growth test of seaweed seedlings using an evaluation seaweed carrier in a planned sea area. The illustrated seaweed carrier 1 for evaluation includes an anchor 2, a rope 3, a floating body 4, and a seaweed seedling 5. The anchor 2 is made of a structure having an appropriate weight such as a concrete block, and one end side of a rope 3 as a rope is connected to a hook 2a planted on the upper surface thereof. On the other hand, a floating body 4 having an appropriate buoyancy is connected to the other end side of the rope 3, and the rope 3 is set so as to be maintained in a substantially vertical state with respect to the flow. In this embodiment, a rope 3 having a length shorter than the depth of water at the installation location is used, and the floating body 4 stops at a predetermined position below the sea surface when the evaluation seaweed carrier 1 is installed. Furthermore, a plurality of seaweed seedlings 5 are attached to the rope 3 at regular intervals along the longitudinal direction thereof. These seaweed seedlings 5 are used at the same growth stage at the start of the growth test, but are placed at different water depths and have different growth environments. It will reflect the difference in the underwater environment in a visible form such as differences and disappearances. Therefore, by observing and comparing the individual growth state of each seaweed seedling 5 attached to the seaweed carrier 1 at any time, data necessary for the suitability evaluation such as the adaptability of the seaweed for transplantation and the optimum water depth range in the place is obtained. Obtainable. Based on the results of the study, the construction structure for the growth is designed, and the type and location of the transplanted seaweed are determined. In addition, in the example of FIG. 1, the growth of the seaweed seedling attached to the lower part of the rope 3 is poor, and the upper part of the rope 3 shows a good growth state. Therefore, in this case, it is only necessary to construct the seaweed bed using a construction structure having a size such that the water depth showing a good growth state becomes the growth place.
[0027]
FIG. 2 is an enlarged view showing a state in which the seaweed seedling 5 is attached to the rope 3 in the evaluation seaweed carrier 1 of FIG. The seaweed seedling 5 used here is a cultured seedling that applies a method widely used in seaweed culture. In other words, seedlings suitable for the attachment of seaweed germ cells such as Cremona (trade name) are immersed in the aquarium where seaweed germ cells (eg, zoospores) are suspended, and the seaweed germ cells are allowed to attach to germinate. After that, the seedling thread 5a grown until the algal body length is about several centimeters in length is cut into a length of about 10 to 20 centimeters, and this is attached to the rope 3, and both end portions thereof are made of wires or the like. It is tightened by a binding band 6 used for binding.
[0028]
Table 1 shows the relationship between the growth stage at the start of the test of the applied seaweed and the optimum execution time and execution period of each work in the case of conducting an aptitude survey using the sea cucumber species of seaweeds. It is a process chart. As shown in this table, in the case of creeper lambs, algal bodies at each growth stage can be applied, from juveniles of several millimeters attached to the seedling yarn to maturable alga bodies that are over 1 year old. It has a great feature in that it can be used for the growth test even in the state of only the roots excluding the leaf-like part. That is, in the algal body in which the leaf-shaped part has already been formed, the change in size is measured in order to see the degree of growth, and when it is used in the state of only the root, the appearance of shoots and the algal body are confirmed. This can be easily determined by looking at the growth state of the leaf-shaped part. In addition, since there is no fragile leaf-like portion, there is an advantage that the handling before the start of the test is easy.
[0029]
[Table 1]

[0030]
By the way, the most important thing in the creation of the seaweed bed is its persistence, and it is necessary to plan so that the transplanted seaweed can maintain a prosperous state for a long time. For this reason, in the suitability survey of the planned sea area, it is necessary to pay sufficient attention to the adaptability in the high water temperature season (August to September), which is particularly likely to disappear. Therefore, the basic idea of aptitude judgment in the present invention is to let the high water temperature season of summer be experienced as a basic condition of the growth test, and to confirm the growth state in the growing season after the summer (from 10 to the following March). It is desirable. Table 1 shows the optimum start time, the breeding period, and the evaluation period of the growth test for the pickled lime at each growth stage from such a viewpoint. By the way, in the case of pickled shark, the alga body in the state of specimen 4 or specimen 5 is targeted, and it is a short period of time to start the test from the summer high water temperature period (August to September) and observe until March of the following year ( It is a method that can be evaluated in about 8 months). In addition, the algal bodies are less susceptible to damage than in the case of using specimens 1 to 3 in which the growth stage is earlier than that, which is advantageous in terms of handling in assembly work at sea, and the test can be started throughout the year. There are also advantages. Although the above observation period is a basic condition in this test method, if a sufficient period of aptitude examination cannot be ensured, it cannot be judged even from the time just before the summer high water temperature period until after summer. The basic concept is the same for perennial seaweeds other than creepers. Regardless of the season, as for annual seaweeds, a growth state corresponding to the specimen 1 or the specimen 2 may be used at the start of the test.
[0031]
FIG. 3 is a partial cross-sectional view showing the main part of a different embodiment of the seaweed carrying tool for evaluation, and the illustrated seaweed carrying tool 10A has the same basic configuration as the transplanted seaweed carrying tool 10 described later. Is. FIG. 4 is a plan view of the fixing body 20 which is one of the main components. The fixing body 20 has a configuration in which a short main rope 12 on which a seaweed seedling 11 is grown is attached to an outer peripheral surface portion of a belt-like ring 21 partially opened by a synthetic resin having appropriate elasticity. . The plurality of fixing members 20 are connected to through holes provided as connecting means for a belt-like ring 21 to be described later through a rope 14, and between the fixing members 20, a cylinder 15 such as a pipe having a predetermined length. By interposing, the fixing members 20 are held at regular intervals. Although not shown, the anchor and the floating body are connected to both ends of the rope 14 in the same manner as the evaluation seaweed carrier 1 in the above embodiment.
[0032]
In the seaweed carrying tool 10A for evaluation described above, the parent rope 12 attached to the fixing body 20 is obtained by using a culture method widely used in seaweed culture, and a plurality of seaweed seedlings are formed on the surface thereof. 11 is growing. The parent rope 12 is produced by first immersing an appropriate seedling thread 13 that is fibrous and suitable for attachment of seaweed germ cells in a land tank where seaweed germ cells (such as zoospores) are floating. Then, after germinating germ cells of seaweeds attached to this, the seedlings 13 in the germinated state are wound around the parent rope 12 as it is, or inserted into the place or tied into the sea to be installed in the sea However, they are grown until the seaweed juveniles are appropriately sized. The attachment of the main rope 12 to the belt-like ring 21 is formed on the inner side of the front end of the receiving portion 22 when fitted into five substantially L-shaped receiving portions 22 along the outer surface of the belt-like ring 21 from above. The protrusion 23 is prevented from coming off, and at the same time, the protrusion 24 provided facing the receiving portion 22 is prevented from moving in the radial direction. Further, the belt-like ring 21 has a hook-like projection 25 on one end side, and the other end portion 26 has a hooking hole (not shown) for receiving and holding the hook-like protrusion 25 in an annular shape. In addition, through holes 27 are provided as connecting means at three locations on the circumference. In this case, if a plastic having a specific gravity smaller than that of water, such as polypropylene, is used as the material of the belt-like ring 21, the buoyancy and the specific gravity of the seaweed seedling 11 and the parent rope 12 are balanced, and the circumference is away from the center of the ring. Even when connected at one place, that is, at a position deviating from the center of gravity, the horizontal state is maintained. Of course, it is possible to connect at multiple points on the circumference.
[0033]
FIG. 5 shows another example of the growth test using the seaweed carrying tool for evaluation in the seaweed bed construction method of the present invention. Here, a plurality of evaluation seaweed carriers 30a, 30b, 30c Planning to create a seaweed bed It is installed near the target sea area. In this case, the basic structure of each evaluation seaweed carrier 30a, 30b, 30c is the same as that shown in FIGS. 3 and 4, and the seaweed seedlings are held on the belt ring 31, but each belt ring The seaweed species differ from unit to unit. Incidentally, in the example of the figure, it can be seen that the seaweed seedlings 32c in the evaluation seaweed carrier 30c grow well when placed at a relatively shallow water depth in the place, and the seaweed seedlings 32a in the evaluation seaweed carrier 30a are: Rather, it can be inferred that deep water depth is more suitable. Moreover, since the seaweed seedling 32b used with the seaweed carrying tool 30b for evaluation does not grow so much at any depth, it can be determined that it is not suitable for this place. Based on such results, a structure for selecting and creating seaweed species may be designed. For example, in the case of planning a seagrass bed using seaweeds, it may be tested by appropriately combining arame, swordfish, chrome, vine jelly, and the like. In addition, when selecting a seaweed species suitable for the place without being particular about a particular seaweed, in addition to the sea buckthorn seaweed, brown algae belonging to the family of the wallaceae such as Honda Walla, Akamoku and Oobamoku, and Tengusa such as Maca and Oats. Red algae belonging to the family, green algae belonging to the family Rosaceae such as human egusa and Aosa can be appropriately combined. In this way, when a plurality of evaluation seaweed carrying tools having different seaweed species for testing are installed in close proximity to each other, based on the comparison of the growth state with respect to the depth of the individual seaweed in each evaluation seaweed carrying device In addition to knowledge, it is also possible to compare different seaweed species with different environmental adaptability, so more detailed information on the underwater environment in the target sea area can be obtained, which will greatly contribute to the realization of the seaweed development plan. In this case, the test seaweed can be kept in a good state before the start of the test, and the test can be started using seaweed in substantially the same storage state. Further, in each band-shaped ring 31, a plurality of seaweed seedlings at the same growth stage are installed in a state of spreading horizontally with respect to the water depth, so the number of samples for each water depth increases, and at each water depth This makes it possible to grasp the underwater environment as a surface, which is convenient for judging the suitability of seaweed beds.
[0034]
And by means like the above Planned sea area Perform aptitude evaluation , After setting the construction conditions, etc., as shown in FIG. Plan judged to be appropriate Installed on the seabed of sea area S. In this case, the transplanted seaweed carrying tool 10 has the same configuration as the evaluation seaweed carrying tool shown in FIGS. 3 and 4, but for that purpose, the seaweed seedling seedlings like the evaluation seaweed carrying tool are used. It is not always necessary that all 11 are in the same growth stage, and the growth stage is preferably close to an adult. Then, breeding or curing work is performed for an appropriate period until the seaweed seedling 11 on the fixing body 20 is in a state suitable for transplantation. In this embodiment, sand bags are used for the anchors 28, and they are arranged at the planned settling positions of the building structure set by the building plan. This transplanted seaweed carrying tool 10 has a structure in which only the lower end side of the rope 14 is fixed and the entire rope 14 swings freely with the lower end as a fulcrum. It is difficult for the seaweed seedlings 11 to be damaged by the seaweed seedlings 11 while growing and curing. Furthermore, even if the force is less likely to concentrate on the leaf-like portion of the seaweed seedling 11 that becomes resistance to flow and the flow at the installation location is fast, the seaweed seedling 11 held by the transplanting seaweed carrier 10 breaks. There is little leakage. Therefore, the loss of the seaweed seedling 11 during the breeding / curing period is small, and at the same time, the seaweed seedling 11 is not used without using the aquaculture facility. plan It can be surely adapted to the underwater environment of the sea area S. In addition, the installation place of these seaweed carrying tools 10 for transplantation is not necessarily Planned Construction Target It is not limited to an area, and may be a surrounding area or other place where the underwater environment is close.
[0035]
When the above breeding / curing work is completed, as shown in FIG. 7, the diver A separates the rope 14 of the transplanted seaweed carrier 10 from the sand bag 28 on the lower end side, and floats 29 on the upper end side of the rope 14. The fixed body 20 with the seaweed seedling 11 is transported to a trolley (not shown) waiting on the sea. Therefore, the sand bag 28 is left on the seabed.
[0036]
on the other hand, plan On the surface of the sea area S, as shown in FIG. 8, a trolley 40 on which a plurality of building structures 50 are mounted stands by. This building structure 50 has a columnar structure in which circular columnar bodies 52 are erected near each corner of a rectangular concrete base 51 in plan view. On the carriage 40, the worker B removes the fixing body 20 with the seaweed seedling 11 in a connected state recovered by the diver A from the sea from the rope 14, and each of the fixing bodies 20 is fixed to the pillar body 52 of the building structure 50. Fit at intervals of. Next, the wire 43 is hung on a hanging hook (not shown) previously planted on the upper surface of the concrete base 51 and lowered to the seabed by the crane 41. Diver A, who has been waiting on the seabed, cooperates with the workers on the carriage 40 and adjusts the installation position of the building structure 50 that has descended using the sand bag 28 left on the seabed as a mark. When this is complete, the wire 43 is removed from the building structure 50. When it is confirmed that the wire 43 has been removed on the carriage 40, the hook 42 of the crane 41 is rolled up to prepare for the next setting work. The collection of the seaweed seedling 11 from the sea, the attachment to the construction structure 50 on the trolley 40, and the substituting work are repeated in the sea and the trolley 40, so that the seaweed seedling 11 can be efficiently attached. The construction work of the construction structure 50 can be performed. In the present invention, a number of seaweed carriers for evaluation are provided. plan If they are installed in an area and show good growth conditions, they can be left as they are and used as a seaweed carrier for transplantation. Therefore, depending on the situation, it is possible to omit the introduction of the transplanting seaweed carrier.
[0037]
Thus, since the transplanted seaweed carrying tool 10 used in the present invention is mainly handled by the belt-like ring 21 of the fixing body 20 in which the seaweed seedlings 11 are integrated, it can be handled in the subsequent breeding / curing work after the assembly. Easy. In particular, when the columnar structure creation structure 50 is a target, the seaweed seedling 11 can be easily and reliably fixed to the column body 52. For this reason, since the seaweed seedling 11 integrated with the fixing body 20 can be attached to the construction structure 50 in a good state, the subsequent growth is ensured, which greatly improves the success rate of seaweed formation. Contribute. In the above-described embodiment, the length of the columnar portion 52 is preferably about 4 m, but may be changed as appropriate depending on the depth of the installation site, the type of seaweed seedling used, and the like. Although not shown in the figure, it is more convenient to increase the growth density of seaweeds by setting up something that can become an aquatic bed of seaweed such as abandoned stones, rather than leaving sand around the construction structure 50. is there. Then, when the seaweed seedling 11 attached to the creation structure 50 having the above configuration via the fixing body 20 matures, countless zoospores are released to the surroundings, and the creation structure 50 and the discarded stones in the vicinity thereof. Adhere to the surface. The seaweed that has grown and grown here releases zoospores as well. By repeating this, the growth range of seaweed gradually expands and a seaweed bed is formed. In the embodiment, since the pillar body 52 of the structure for construction 50 is erected in the vertical direction, when the periphery of the construction structure 50 is sandy land, the seaweed seedling 11 that has grown on the pillar body 52 is rolled up. Since the seaweeds are less likely to be affected by the sand and the seaweeds are likely to remain even if the construction structure 50 is buried somewhat, the persistence of the seaweed beds centering on these structures is high. In the embodiment, an example in which a plurality of fixing bodies 20 are attached to all the column bodies 52 has been described. However, attachment to only some of the column bodies 52 is not an obstacle, and the number of the fixing bodies 20 can be increased or decreased. Of course, changes are possible.
[0038]
By the way, in the case of seaweed basin construction by crane lamame, plan Ocean The following procedure is envisaged in order to carry out the process from determining the suitability of the area to construction in the shortest period. That is, the growth test using the seaweed carrying tool for evaluation is conducted for about four months from around June to around September, and the growth and curing of the seaweed seedling using the seaweed carrying tool for transplantation is performed at the start of the seaweed seedling. Depending on the growth stage, the period from September to December is the target period. Therefore, in this case, plan within one year at the shortest Ocean It is also possible to complete the construction based on the results from judging the suitability of the area.
[0039]
FIG. 9 is another construction example and shows a different attachment method of the fixing body 20 in which the seaweed seedling 11 is integrated. In the embodiment of FIG. 8, each fixing body 20 is fixed in advance to a predetermined position of the pillar body 52 of the building structure 50 on the carriage 40. In this case, each pillar body 52 is placed on the carriage 40. After being set in a state of being inserted (temporarily fixed) so as to be stacked in plural at the lower end portion (base portion) of each of the two, it is fixed at a predetermined position in the sea. That is, the diver A in the sea fixes the fixing body 20 with the seaweed seedlings 11 at the lower end portion of each pillar body 52 as it is and moves upward to fix the pillar body 52 in order from the bottom to the top. To do. In this method, the working time on the carriage 40 is shorter than the above, and the damage to the seaweed seedling 11 is reduced. Further, although not shown, the rope 14 separated from the anchor 28 and the fixing body 20 with the seaweed seedling 11 are temporarily locked to a storage anchor provided on the sea floor near the settling place without being raised on the carriage. In addition, it may be transferred from there to the building structure 50 at any time.
[0040]
Next, FIG. 10 is an embodiment in which the transplanting seaweed carrying tool 60 in which the seaweed seedlings 62 are attached to the rope 61 at an appropriate interval by the same means as the evaluation seaweed carrying tool 1 is used as it is. . In this case, it is the same as described above until the suitability of the planned sea area is confirmed by the evaluation seaweed carrier 1. The transplanting seaweed carrying tool 60 is installed so that the anchor 63 is positioned at an appropriate place in consideration of the planned setting position of the construction structure 50, and grows or cures the seaweed seedlings 62. Then, the building structure 50 is sunk at a predetermined position when it is completed. Here, the zoospores released from the seaweed seedlings 62 matured on the transplanted seaweed carrier 60 are easily captured by the pillars 52 erected on the base 51 and gradually spread over the entire structure 50 for formation. Go. In such an embodiment, it is preferable to apply the algae nourishing paint as described above to the surface of the structure in order to assist adhesion of zoospores and subsequent growth.
[0041]
In addition, although the structure for construction used in combination with the seaweed carrier for transplantation has been described as an example of a structure in which a cylinder is erected on a rectangular base in each of the above embodiments, it is not limited to this. . As the shape of the base in the columnar structure, an appropriate shape such as a cross shape, a trifurcated shape, a hexagonal shape can be selected, and the shape of the column may be a polygonal column in addition to a column. Needless to say, the shape of the fixing member fixed to the lens is also formed in a polygonal shape. Furthermore, other than the columnar structure, for example, a so-called parallel fishing reef formed in a lattice frame shape and other structures of various shapes and materials are applicable. In addition, as a seaweed carrying tool for transplantation, a longline type used in general seaweed aquaculture is adopted, and various modifications within the technical idea of the present invention are included, including its shape and installation location. Is possible.
[0042]
【Effect of the invention】
As described above, in the seaweed bed construction according to the present invention, the plan is to use a seaweed carrier for evaluation. Ocean The suitability of the area is evaluated, and based on the results, an appropriate seaweed carrier for transplantation is (Planned sea area) or surrounding area where the underwater environment is close The seaweed for transplantation is adapted to the underwater environment and installed in the target area in combination with the construction structure that serves as the foundation for growth. In addition, its practical effect is extremely large, such as easy construction.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a state during a growth test using an evaluation seaweed carrier used in the present invention.
FIG. 2 is an enlarged view showing a state of seaweed attachment in the evaluation seaweed carrier of FIG. 1;
FIG. 3 is a partial cross-sectional view showing a main part of a different example of a seaweed carrying tool for evaluation.
FIG. 4 is a plan view of a fixing body used in a seaweed carrier for evaluation or a seaweed carrier for transplantation.
FIG. 5 is an explanatory view showing another example of the growth test using the evaluation seaweed carrier according to the present invention.
FIG. 6 is an explanatory view showing a state of growing or curing seaweed seedlings for transplantation in the present invention.
FIG. 7 is an explanatory diagram showing the state of recovery of transplanted seaweed seedlings that have been grown or cured.
FIG. 8 is an explanatory view showing a set-up state of the building structure.
FIG. 9 is an explanatory view showing another embodiment of the seaweed bed construction method according to the present invention.
FIG. 10 is an explanatory view showing another embodiment of the seaweed bed construction method according to the present invention.
[Explanation of symbols]
1, 10A, 30a, 30b, 30c ... Seaweed carrier for evaluation, 2, 28, 63 anchor, 3, 14, 61 ... Rope, 4, 29 ... Floating body, 5, 11, 32a, 32b, 32c, 62 ... Seaweed seedlings, 10, 60 ... Seaweed carrier for transplantation, 20 ... Fixing body, 40 ... Boat, 50 ... Construction structure, 51 ... Base, 52 ... Pillar

Claims (3)

A seaweed carrying device for evaluation, which is composed of seaweed seedlings at almost the same growth stage at a predetermined interval along the longitudinal direction of the rope connecting the floating body and the anchor, is installed on the seabed in the planned sea area in a substantially vertical state. Then, after confirming the suitability of the seaweed formation area by comparing the growth status of seaweed seedlings placed at different water depths, the evaluation is performed on the ropes held in place in the sea by floating bodies and anchors. The transplanted seaweed carrying device to which a plurality of seaweed seedlings whose types are selected based on the observation results of the seaweed carrying device is attached to the planned sea area where the suitability has been confirmed or to other areas where the underwater environment is similar to the planned sea area. The seaweed seedlings were brought into a state that can be adapted to the underwater environment of the planned sea area by raising or curing these seaweed seedlings in the sea, and their suitability was confirmed along with appropriate construction structures. Serial by installing the program waters, seaweed beds Construction wherein the to flourish seaweed around seaweed seedlings attached to the implantable seaweed carrying device as mother algae.   The anchor of the seaweed carrying tool for transplantation is a sand bag, and after disposing the construction structure for construction, separating the ropes and the like and leaving them on the sea floor before the construction of the construction structure The seaweed bed construction method according to claim 1 characterized by these.   The seaweed seedling of the seaweed carrying tool for transplantation is a cultured seedling integrated with a fixing body, and is attached to the rope and the constructing structure via the fixing body. How to create a seaweed bed.

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