JP2004089008A - Method for creating seaweed bed and created reef of seaweed bed - Google Patents

Method for creating seaweed bed and created reef of seaweed bed Download PDF

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Publication number
JP2004089008A
JP2004089008A JP2002250952A JP2002250952A JP2004089008A JP 2004089008 A JP2004089008 A JP 2004089008A JP 2002250952 A JP2002250952 A JP 2002250952A JP 2002250952 A JP2002250952 A JP 2002250952A JP 2004089008 A JP2004089008 A JP 2004089008A
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Japan
Prior art keywords
fish
reef
epiphytic
seaweed bed
algae
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JP2002250952A
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Japanese (ja)
Inventor
Hideo Nakamura
中村 英夫
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NIPPON GYOJO SYSTEM KK
UMI KOBO KK
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NIPPON GYOJO SYSTEM KK
UMI KOBO KK
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Priority to JP2002250952A priority Critical patent/JP2004089008A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for creating (a method for constructing) a fishing bank and a fishing ground with which damage to useful algae by eating with herbivorous fishes, etc., can be suppressed when a seaweed bed (seaweed community) of the useful algae is developed. <P>SOLUTION: The fishing bank is composed of an epiphytic part 2 for epiphytizing the algae, a first fishing bank part composed of fishing bank blocks 1 making piscivorous large-sized fishes 5 live and a second fishing bank part making nonherbivorous small-sized fishes 6 to be baits taken by the piscivorous large-sized fishes 5 live and composed of columnar structural parts 3 having the epiphytic part for the algae. The piscivorous large-sized fishes 5 threatening the herbivorous fishes are made to live. Thereby, the herbivorous fishes are kept away from the seaweed bed. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、有用藻類の藻場(海藻群落)を造成する際に、植食性魚類等による食害の抑制を目的とした藻場の造成方法及び藻場造成礁に関する。
【0002】
【発明が解決しようとする課題】
従来より、沿岸岩礁域において、食用となるコンブ類等の褐藻類や、ウニ、アワビなどの飼料等に用いられるアラメ、カジメ等の海藻、或いは有用魚類の稚魚や未成魚の餌場等の育成環境を提供するホンダワラ類などの大型褐藻類の藻場造成が広く行われている。
【0003】
ところで、近年の沿岸岩礁域では、磯焼け現象等の様々な原因により藻場が荒廃しているという問題が深刻化している。これにより、コンブ類、ホンダワラ類等の有用藻類からなる藻場が消滅して、これに伴って、水産資源に多大な影響と損失を与えている。これは、地球上の気温上昇による水温の上昇等に伴い、有用海藻群の生長に不可欠と言われている栄養塩や鉄イオン等の海水中の栄養不足、藻食動物の過剰な摂食等の様々な要因が考えられる。
【0004】
とりわけ、黒潮などの暖流沿岸部においては磯焼けの主な要因は、植食性魚類の食害が大きな要因になっていると言われている。特に、アイゴ、ブダイ等の植食性魚類は海藻類の生長点付近を好んで摂食してしまう為、藻類の生育が低下してしまい、藻場衰退の大きな原因となっている。
【0005】
上述した問題に対して、従来では藻場の着生気質全体を、食害防止網、或いは、ブロック状の籠体に形成させた金網などを用いて囲包状態にする等の魚避手段により食害防止方法が行われていた。
【0006】
しかしながら、藻場の着生基質全体を網や金網で囲包する方法は、耐波性が悪く、防止網の棄損又は破損により、漁網が海中へ流出してしまうことによる環境汚染に繋がる虞もあり、また、着生基質全体を網や金網で囲包する方法ではコストがかかるとともに、これらの維持管理にも問題があった。
【0007】
また、長期間の放網状態において、防止網や金網に貝類や海藻類が着生し目詰まりすることがあり、結果的に遮光性が悪化して、効果的に光合成を行うことが困難になり、藻類の育成の妨げとなっていた。
【0008】
本発明は上記課題に基づいてなされたものであり、アイゴ、ブダイ等の植食性魚類から藻場の有用藻類の食害を防ぐ為、植食性魚類が寄り付かない魚食性大型魚類の好適な棲息環境を藻場造成礁に設けることにより、植食性魚類が寄り付かないという生態的な競合関係を利用することで、コンブ類、ホンダワラ類等の有用藻類の繁茂を促進することができ、磯焼け現象などによって荒廃している沿岸域の環境改善を図ることができる藻場の造成方法及び藻場造成礁を提供することを目的とする。
【0009】
【課題を解決するための手段】
本発明の請求項1記載の藻場の造成方法は、藻類を着生させる着生部を備え、その着生部を海底に沈設させて藻類を育成する藻場の造成方法において、前記着生部に着生する藻類を餌料とする植食性魚類による食害を抑制するために、その植食性魚類を威嚇する魚食性大型魚類を前記着生部に棲息させるように構成したものである。
【0010】
これにより、藻場を形成する造成体に、魚食性大型魚類を蝟集させて棲息させる空間を設けたものであるので、着生気質部に着生する有用藻類の繁茂の妨げとなる植食性魚類が藻場に寄り付かなくなる。
【0011】
また、請求項2記載の藻場の造成方法は、前記着生部に非植食性小型魚類を柱状構造物によって集魚・棲息させることによって、前記魚食性大型魚類を前記着生部付近に棲息させるように構成したものである。
【0012】
これにより、藻場を形成する造成体に、前記魚食性魚類が好んで捕食する藻食性のない小型魚類を蝟集させる柱状の棲息空間を設けたことにより、これに伴って魚食性大型魚類が永続的に棲息し、この魚食性大型魚類に威嚇される植食性魚類が藻場に寄り付かなくなる。
【0013】
また、請求項3記載の藻場造成礁は、藻類を着生させる着生部と、魚食性大型魚類が棲息する第1魚礁部と、この魚食性大型魚類が餌料とする非植食性小型魚類が棲息する第2魚礁部とを具備したものである。
【0014】
これにより、藻場の育成を活性化させる藻礁基盤となる着生部に、魚食性魚類と前記魚食性魚類が好んで捕食する藻食性のない小型魚類を蝟集させる魚礁部をそれぞれ設けた棲息空間を組み合わせて構成させた藻場造成礁であるので、前記藻場に繁茂する有用藻類を摂食する植食性魚類が藻場に寄り付かなくなる。
【0015】
また、請求項4記載の藻場造成礁は、前記第1魚礁部を構成する複数の魚礁ブロックを設け、この魚礁ブロック上に前記着生部を形成するとともに、この着生部上に前記第2魚礁部を構成する柱状構造物を形成したものである。
【0016】
これにより、第1魚礁部をコンクリートや金属材料等を用いて、ブロック状に構成させて、これらを組み合わせることで種々の形状、大きさの魚礁空間とすることができるので、設置条件や場所に応じた大きさの魚礁を容易に製造することができる。また、前記第1魚礁部が基台となり、この上部に所望の大きさの着生部を形成させて、この着生部上に前記第2魚礁部である柱状構造物を適宜な位置に形成することで、所望する魚類の棲息空間を形成することができる。
【0017】
【発明の実施形態】
以下、本発明の実施形態を添付図を参照して説明する。図1は本発明の藻場造成礁の一実施形態による斜視図である。図2は本発明の藻場造成礁の各構造物の分解形態を示す斜視図、図3は本発明の藻場造成礁を沈設した実施形態の側面図であり、図4は本発明の藻場造成礁の使用状態である一実施例を示す斜視図である。これらの図に基づいて各部の構成を説明する。
【0018】
図1に示すように、本実施例の藻場の造成方法は、魚食性大型魚類の棲息空間で、魚礁ブロック1からなる第1魚礁部と、藻場を繁茂させる着生基質面2´を有する着生部2と、藻類の着生又は付着効果を有し、これらを適宜な位置に立設することで、非植食性魚類の棲息空間を形成する柱状構造部3からなる第2魚礁部とにより構成されるものである。これにより、魚食性大型魚類の好適な棲息環境を創ることができるので、藻類を摂食する植食性魚類が藻場に近寄らなくなるものである。
【0019】
次に本実施例の藻場造成礁の詳細な利用方法について図1、図2に基づいて説明する。本発明の藻場造成礁は、魚礁ブロック1を基台としている。この魚礁ブロック1は略コ字状や円筒状等の複数の空洞型の魚礁ブロック1から形成される。前記魚礁ブロック1は、魚食性大型魚類の生態性質を考慮して形成されるものであり、内部に魚食性大型魚類が棲息する空間部1aを備えている。この空間部1aに、例えば、着生面や付近の海底に棲息するヒラメや沿岸の藻類の多い岩礁などを好むマハタやクエ等のハタ科の魚食性大型魚類を効果的に蝟集することができる他、回遊性の強い魚食性魚類の集魚効果も得ることが出来る。
【0020】
また、前記基台となる魚礁ブロック1と連接、又は結合させて成型する藻類の着成基質面2´を有する着生部2は、合金製の鋳物、コンクリートや自然石などの割石、砕石、又は貝殻等を用いた多様な材質により形成される藻類着生基盤である。また、これらの材質材料を用いることで、微細で複雑な凹凸状などにより表面を形成することも出来るので、所望する有用藻類の成長を促すことができる。これにより、ワカメ、コンブ類等の隠花藻類は勿論、カジメ、アラメ、ホンダワラ等の大型褐藻類が群落状に繁茂する藻場造成が可能となるものである。
【0021】
また、前記着生部2に接合又は連接される柱状構造部3は、鉄塔状や円柱状などで形成された構造物であり、コンクリートや鉄などの様々な材料を用いて形成することが可能である。更に、前記柱状構造部2は適宜な位置に立設させることで集魚効果を得ることが出来るもので、前記複数の柱状構造部3間は魚礁空間として構成されるものであり、小型魚類の隠棲性質等を考慮して集魚効果を高めることを目的とした成形部材3aを備えるものである。前記魚礁空間には、主に、動物性プランクトンなどを餌料とする非植食性小型魚類の好適な棲息環境を形成するものであり、例えば、体長約10センチ程の小型魚であるネンブツダイをはじめ、カタクチイワシ、マイワシ等のニシン科の小型魚類やアジ科の魚類である、シマアジ、マアジ等の未成魚を蝟集させることができるようになる。
【0022】
また、本実施例の藻場の造成方法は、図2に示すように、簡素な構造物により構成されるもので、それぞれの構造部を連接するなどして組み合わせて形成してもよいし、これらをコンクリートや鉄などで一体型の構造物として形成してもよい。更には、形状、配列、大きさなどに規則性がなく、所望の用途に応じて自由に組み合わせることが可能である。
【0023】
また、図3に示した本実施例の藻場造成礁を沿岸域の海底部7に沈設させる実施形態によると、魚食性大型魚類5の棲息しやすい空間部1aを備える魚礁ブロック1が基台となり、着生部2,柱状構造部3,更に、これに設けた成形部材3aにより非植食性小型魚類6を蝟集することができるようになる。
【0024】
以上のように、魚食性大型魚類5が棲息する魚礁空間を藻場に造成したことにより、これに威嚇される有用藻類を摂食するアイゴ、ブダイが藻場に寄り付かなくなり、結果的に藻場に繁茂する有用藻類を摂食するアイゴ、ブダイなどの植食性魚類(図示しない)による食害を抑制することができるようになる。
【0025】
また、図4に示した本発明の藻場造成礁の一実施例は、既存の魚礁成形体8と組み合わせて漁場造成することにより、図中の漁場全体に、魚食性大型魚類5の集魚効果と植食性魚類から藻類の食害を抑制することができる漁場造成手法(工法)である。前述したように、本実施例の藻場造成手法は、設置する条件や海域、場所などに応じて、また、既存の魚礁成形体の近傍に沈設することにより広域な藻場の食害を抑制することも可能なものである。これにより、有用な藻類の繁茂と魚類の蝟集作用を兼ね備え、水産資源の保護に寄与しうるものである。
【0026】
さらに、本発明の藻場の造成方法及び藻場造成礁では、忌避剤のような薬品の使用、棘状などで構成する物理的な防止具、または防止魚網などを用いることがないものであり、魚類の生態的競合を利用することで、藻場の食害を抑制することを可能にしたものであり、環境汚染が生じることもなく、また、これらを回収する必要もないので、永続した有用藻類の藻場育成が可能となる。
【0027】
尚、本発明は上記実施形態に限定されるものではなく、本発明の要旨の範囲内において、種々の変形実施が可能である。例えば、魚礁ブロック1や柱状構造部3の形状は適宜選定すればよい。
【0028】
【発明の効果】
本発明の請求項1記載の藻場の造成方法は、藻類を着生させる着生部を備え、その着生部を海底に沈設させて藻類を育成する藻場の造成方法において、前記着生部に着生する藻類を餌料とする植食性魚類による食害を抑制するために、その植食性魚類を威嚇する魚食性大型魚類を前記着生部に棲息させるように構成したものであるから、植食性魚類は、魚食性大型魚類の棲息区域には、近づかない生態的競合関係があるので、魚食性大型魚類を藻場に棲息させることにより、藻場の食害を抑制するとともに、永続的な藻場の育成を図ることができる。
【0029】
また、請求項2記載の藻場の造成方法は、前記着生部に非植食性小型魚類を柱状構造物によって集魚・棲息させることによって、前記魚食性大型魚類を前記着生部付近に棲息させるように構成したものであるから、前記魚食性大型魚類が好んで捕食する、藻食性のない小型魚類の好適な柱状の棲息空間を設けたので、前記魚食性大型魚類が藻場に蝟集し、永続的に棲息するようになる。
【0030】
また、請求項3記載の藻場造成礁は、藻類を着生させる着生部と、魚食性大型魚類が棲息する第1魚礁部と、この魚食性大型魚類が餌料とする非植食性小型魚類が棲息する第2魚礁部とを具備したものであるから、これらを組み合わせて構成させることが可能な簡素な構成であるので、凡用性に優れたものであり、製造や沿岸部への設置が容易にできるものである。
【0031】
また、請求項4記載の藻場造成礁は、前記請求項3において、前記第1魚礁部を構成する複数の魚礁ブロックを設け、この魚礁ブロック上に前記着生部を形成するとともに、この着生部上に前記第2魚礁部を構成する柱状構造部を形成したものであるから、藻類の着生部に対して影となる部分などが少なく、藻類をより効果的に繁茂させることができる。
【図面の簡単な説明】
【図1】本発明の一実施例を示す斜視図である。
【図2】本発明の一実施例の各構造物の分解状態を示す斜視図である。
【図3】本発明の一実施例を沈設した実施形態の側面図である。
【図4】図4は本発明の藻場造成礁の使用状態である一実施例を示す斜視図である。
【符号の説明】
1  魚礁ブロック
2  着生面
3  柱状構造部
5  魚食性大型魚類
6  非植食性小型魚類
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for constructing a seaweed bed and a reef for forming a seaweed bed for the purpose of suppressing damage caused by herbivorous fish and the like when creating a seaweed bed (seaweed community) of useful algae.
[0002]
[Problems to be solved by the invention]
Conventionally, in the coastal reef area, brown algae such as edible kelp, seaweed such as alame and swordfish used for feed such as sea urchin and abalone, and a feeding environment for fry and immature fish such as useful fish. Seagrass beds of large brown algae such as Honda straw are widely used.
[0003]
By the way, in the coastal reef area in recent years, the problem that the seaweed beds are degraded due to various causes such as the sea-burn phenomenon has become more serious. As a result, the seaweed beds composed of useful algae such as kelp and Honda straw are extinguished, and accordingly, marine resources are greatly affected and lost. This is due to an increase in water temperature due to rising temperatures on the earth, a lack of nutrition in seawater such as nutrients and iron ions, which are said to be indispensable for the growth of useful seaweeds, and an excessive consumption of algae eaters. Various factors can be considered.
[0004]
In particular, it is said that the main factor of the sea bombing in the coastal area of the warm current such as the Kuroshio is the damage by herbivorous fish. In particular, phytophagous fish such as aigo and parrotfish prefer to eat near the growth point of seaweed, so that the growth of algae is reduced and this is a major cause of the decline of seaweed beds.
[0005]
Conventionally, the entire epiphytic temperament of the seaweed bed has been eroded by fish-evading means, such as by using a net for preventing damage to the seaweed or a wire mesh formed in a block-like cage. Prevention measures were in place.
[0006]
However, the method of enclosing the entire epiphytic substrate of the seaweed bed with a net or wire netting has poor wave resistance, and there is a risk that the fishing net will flow into the sea due to the loss or breakage of the prevention net, which may lead to environmental pollution. In addition, the method of enclosing the entire epiphytic substrate with a net or a wire net is costly and has a problem in the maintenance and management of these.
[0007]
In addition, in the long-term broadcasting state, shellfish and seaweeds may form on the prevention net or wire net and clog them, resulting in poor light-shielding properties, making it difficult to perform effective photosynthesis. It hindered the growth of algae.
[0008]
The present invention has been made based on the above-mentioned problems, and in order to prevent the damage of useful algae in a seaweed bed from herbivorous fish such as aigo, parrotfish, etc., a suitable habitat for fish-eating large fish to which the herbivorous fish does not approach. By using the ecological competitive relationship that phytophagous fish do not approach by setting up seaweed beds on reefs, it is possible to promote the growth of useful algae such as kelp and honda straw, It is an object of the present invention to provide a method for creating a seaweed bed and a seaweed bed reef that can improve the environment of a coastal area that is devastated by the above.
[0009]
[Means for Solving the Problems]
The method for constructing a seaweed bed according to claim 1 of the present invention, further comprising the step of forming a seaweed bed for growing algae, the method comprising the step of cultivating algae by submerging the setter on the seabed. In order to suppress the damage caused by the herbivorous fish that feeds on the algae that grow on the part, the fish-eating large fish that threaten the herbivorous fish are made to inhabit the above-described part.
[0010]
This provides a space where the fish-eating large fish can be gathered and inhabited in the formed body that forms the seaweed bed, so that the phytophagous fish that hinder the growth of the useful algae that settle on the epiphytic temperament Stops sticking to the seaweed bed.
[0011]
In the method for creating a seaweed bed according to claim 2, the non-vegetable small fish are collected and inhabited by the columnar structure in the epiphytic part, so that the fish-eating large fish inhabit the vicinity of the epiphytic part. It is configured as follows.
[0012]
Thereby, by providing a pillar-shaped habitat for gathering small fishes that do not have algae phagocytosis that the fish-eating fish prefer to prey on the formed body that forms the seaweed bed, the fish-eating large fishes are permanently associated with this. The phytophagous fish threatened by the fish-eating large fish will not stay at the seaweed beds.
[0013]
In addition, the seaweed bed reef according to claim 3 is an epiphytic part for growing algae, a first reef part inhabiting a fish-eating large fish, and a non-vegetable small fish to which the fish-eating large fish feed. And a second fish reef inhabited there.
[0014]
In this way, a habitat where fish-eating fish and small fishes without algae that fish-eating fish prefer and prey on are gathered in the epiphytic part which becomes the algal base that activates the development of seaweed beds. Since it is a seaweed bed reef constructed by combining spaces, herbivorous fish that feed on useful algae that thrive on the seaweed bed do not approach the seaweed bed.
[0015]
In addition, the seaweed bed reef according to claim 4 is provided with a plurality of fish reef blocks constituting the first fish reef, forming the epiphytic portion on the fish reef block, and forming the first epiphytic portion on the epiphytic portion. The columnar structure that forms the two reefs is formed.
[0016]
This makes it possible to construct the first reef section into a block shape using concrete, metal material, or the like, and to combine them to form a reef space of various shapes and sizes. A fish reef of a suitable size can be easily manufactured. Further, the first fish reef portion serves as a base, and an epiphytic portion having a desired size is formed thereon, and the columnar structure as the second fish reef portion is formed at an appropriate position on the epiphytic portion. By doing so, it is possible to form a desired fish habitation space.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of one embodiment of a seaweed bed reef according to the present invention. FIG. 2 is a perspective view showing a disassembled form of each structure of the seaweed bed reef of the present invention, FIG. 3 is a side view of an embodiment in which the seaweed bed reef of the present invention is laid, and FIG. 4 is an alga of the present invention. It is a perspective view which shows one Example in the use state of a field creation reef. The configuration of each unit will be described based on these drawings.
[0018]
As shown in FIG. 1, the method for creating a seaweed bed according to the present embodiment includes, in a habitat for a large fish-eating fish, a first fish reef portion composed of a fish reef block 1 and an epiphytic substrate surface 2 ′ on which the seaweed bed prospers. A second fish reef comprising a columnar structure 3 having an epiphytic portion 2 and an epiphytic or adhering effect of algae and standing at an appropriate position to form a habitat for non-vegetable fish It is composed of This makes it possible to create a favorable habitat for fish-eating large fish, so that herbivorous fish that feed on algae do not approach the seaweed bed.
[0019]
Next, a detailed method of using the seaweed bed reef according to the present embodiment will be described with reference to FIGS. The seaweed bed reef of the present invention is based on a fish reef block 1. This fish reef block 1 is formed from a plurality of hollow fish reef blocks 1 having a substantially U-shape or a cylindrical shape. The fish reef block 1 is formed in consideration of the ecological properties of fish-eating large fish, and has a space 1a in which fish-eating large fish live. In this space portion 1a, for example, grouper fish-eating large fishes of groupers such as flounders and queres, which prefer flounders living on the epiphytic surface or in the vicinity of the seabed or coastal algae-rich reefs, can be effectively gathered. In addition, a fish-collecting effect of a fish-eating fish having strong migratory properties can be obtained.
[0020]
In addition, the formation part 2 having an algae formation substrate surface 2 ′ which is formed by connecting or bonding with the fish reef block 1 serving as the base is made of an alloy casting, crushed stone such as concrete or natural stone, crushed stone, Alternatively, it is an algal epiphytic base formed by various materials using shells and the like. In addition, by using these materials, the surface can be formed with fine and complicated irregularities and the like, so that the growth of desired useful algae can be promoted. This makes it possible to create a seaweed bed in which large brown algae such as sea cucumber, arame, and honda straw, as well as hidden flower algae such as seaweed and kelp, prosper in a colony.
[0021]
In addition, the columnar structure portion 3 joined or connected to the formation section 2 is a structure formed in a tower shape or a column shape, and can be formed using various materials such as concrete and iron. It is. Further, the columnar structure 2 can obtain a fish collecting effect by being erected at an appropriate position. The space between the plurality of columnar structures 3 is configured as a fish reef space, and the refuge of small fishes It is provided with a molded member 3a for the purpose of enhancing the fish collecting effect in consideration of properties and the like. The fish reef space mainly forms a suitable habitat for non-vegetable small fishes that feed on zooplankton and the like, including, for example, Nembutdai, a small fish of about 10 cm in length, It becomes possible to collect small fish of the herring family, such as anchovy and sardine, and immature fish, such as horse mackerel and horse mackerel, which are fish of the horse mackerel family.
[0022]
In addition, as shown in FIG. 2, the method of forming a seaweed bed of the present embodiment is configured by a simple structure, and may be formed by connecting and connecting the respective structural parts, These may be formed as an integrated structure using concrete, iron, or the like. Furthermore, shapes, arrangements, sizes, and the like have no regularity, and can be freely combined according to a desired use.
[0023]
Further, according to the embodiment shown in FIG. 3 in which the seaweed bed reef of the present embodiment is submerged on the seabed 7 in the coastal area, the fish reef block 1 including the space 1a in which the fish-eating large fishes 5 can easily inhabit is based. Thus, the non-herbivorous small fishes 6 can be gathered by the epiphytic portion 2, the columnar structure portion 3, and the formed member 3a provided thereon.
[0024]
As described above, the creation of a fish reef space inhabited by fish-eating large fishes 5 in seaweed beds makes it impossible for Aigos and parrots, which feed on useful algae threatened by this, to approach the seaweed beds. It becomes possible to suppress the damage caused by herbivorous fish (not shown) such as aigo and parrots feeding on useful algae that grow in the field.
[0025]
Further, in the embodiment of the seaweed bed reef of the present invention shown in FIG. 4, the fishing ground is formed in combination with the existing fish reef molded body 8, and the effect of collecting the fish-eating large fish 5 on the entire fishing ground in the figure is obtained. It is a fishing ground development method (construction method) that can control the damage of algae from herbivorous fish. As described above, the seaweed bed creation method according to the present embodiment suppresses the damage to the seaweed beds over a wide area by being settled in the vicinity of an existing fish reef molded body according to the installation conditions, the sea area, the place, and the like. It is also possible. As a result, it has both a useful algae overgrowth and a fish gathering action, and can contribute to the protection of marine resources.
[0026]
Furthermore, in the method of forming a seaweed bed and the seaweed bed reef of the present invention, the use of chemicals such as repellents, the use of a physical prevention tool composed of spines or the like, or the prevention of a fish net is not required. By using the ecological competition of fish, it is possible to control the damage of seagrass beds. It is possible to grow algae beds of algae.
[0027]
Note that the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the shapes of the reef block 1 and the columnar structure 3 may be appropriately selected.
[0028]
【The invention's effect】
The method for constructing a seaweed bed according to claim 1 of the present invention, further comprising the step of forming a seaweed bed for growing algae, the method comprising the step of cultivating algae by submerging the setter on the seabed. In order to suppress the damage caused by the herbivorous fish that feed on the algae that grow on the part, the fish-eating large fish that threaten the herbivorous fish is configured to inhabit the above-described part, so that the planting is performed. Since there are ecological competitions between fish-eating fish and the habitats of fish-eating large fish, they do not get close to each other. We can plan upbringing of place.
[0029]
In the method for creating a seaweed bed according to claim 2, the non-vegetable small fish are collected and inhabited by the columnar structure in the epiphytic part, so that the fish-eating large fish inhabit the vicinity of the epiphytic part. Since it is configured as such, the fish-eating large fish prefer to prey, a suitable columnar habitat for small fish without algae is provided, so that the fish-eating large fish gather in the seaweed bed, Inhabits permanently.
[0030]
In addition, the seaweed bed reef according to claim 3 is an epiphytic part for growing algae, a first reef part inhabiting a fish-eating large fish, and a non-vegetable small fish to which the fish-eating large fish feed. It is equipped with a second reef where the inhabitants live, so it is a simple configuration that can be configured by combining them, so it is excellent in versatility and can be manufactured and installed in the coastal area Can be easily done.
[0031]
Further, the seaweed bed reef according to claim 4 is provided with a plurality of fish reef blocks constituting the first fish reef part according to claim 3, forming the epiphytic part on the fish reef block, Since the columnar structure constituting the second fish reef is formed on the living part, there are few shadows and the like with respect to the algae formation part, and the algae can be more effectively grown. .
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a perspective view showing an exploded state of each structure according to one embodiment of the present invention.
FIG. 3 is a side view of an embodiment in which an example of the present invention is laid down.
FIG. 4 is a perspective view showing one embodiment of the use state of the seaweed bed reef according to the present invention.
[Explanation of symbols]
Reference Signs List 1 fish reef block 2 epiphytic surface 3 columnar structure 5 fish-eating large fish 6 non-vegetable small fish

Claims (4)

藻類を着生させる着生部を備え、その着生部を海底に沈設させて藻類を育成する藻場の造成方法において、前記着生部に着生する藻類を餌料とする植食性魚類による食害を抑制するために、その植食性魚類を威嚇する魚食性大型魚類を前記着生部に棲息させるように構成したことを特徴とする藻場の造成方法。A method of constructing a seaweed bed comprising an epiphytic part for growing algae and cultivating the algae by submerging the epiphytic part on the seabed, wherein the damage caused by the herbivorous fish that feeds on the algae growing on the epiphytic part is provided. A method for constructing a seaweed bed, characterized in that fish-eating large fish threatening the herbivorous fish are inhabited in the epiphytic part in order to suppress the phytophagous fish. 前記着生部に非植食性小型魚類を柱状構造物によって集魚・棲息させることによって、前記魚食性大型魚類を前記着生部付近に棲息させるように構成したことを特徴とする藻場の造成方法。A method for creating a seaweed bed, wherein the fish-eating large fish are inhabited in the vicinity of the epiphytic area by collecting and inhabiting the non-herbivorous small fish in the epiphytic area by means of a columnar structure. . 藻類を着生させる着生部と、魚食性大型魚類が棲息する第1魚礁部と、この魚食性大型魚類が餌料とする非植食性小型魚類が棲息する第2魚礁部とを具備したことを特徴とする藻場造成礁。An epiphytic part for growing algae, a first fish reef inhabited by fish-eating large fish, and a second fish reef inhabited by non-vegetable small fish fed by the fish-eating large fish. A characteristic seaweed bed reef. 前記第1魚礁部を構成する複数の魚礁ブロックを設け、この魚礁ブロック上に前記着生部を形成するとともに、この着生部上に前記第2魚礁部を構成する柱状構造部を形成したことを特徴とする請求項3記載の藻場造成礁。A plurality of fish reef blocks constituting the first fish reef portion are provided, the epiphytic portion is formed on the fish reef block, and a columnar structure portion constituting the second fish reef portion is formed on the epiphytic portion. The seaweed bed reef according to claim 3, characterized in that:
JP2002250952A 2002-08-29 2002-08-29 Method for creating seaweed bed and created reef of seaweed bed Pending JP2004089008A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007295908A (en) * 2006-04-28 2007-11-15 Sunao Uehara Method for growing adhering marine organism by dendritic three-dimensional structure
KR101217106B1 (en) 2010-03-09 2012-12-31 (주) 해양비전21 The artificial fishing reef with flexibility for the construction of seaweed forest
US20140020283A1 (en) * 2010-06-17 2014-01-23 Bergen Teknologioverforing As Method
CN109006584A (en) * 2018-07-18 2018-12-18 浙江海洋大学 A kind of circulating attached ovum device of reef formula suitable for cuttlefish reproduction and its application method
KR102600638B1 (en) * 2023-07-14 2023-11-09 곽철우 A device assembly for blocking access of sea urchin and a manufacturing method for the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007295908A (en) * 2006-04-28 2007-11-15 Sunao Uehara Method for growing adhering marine organism by dendritic three-dimensional structure
KR101217106B1 (en) 2010-03-09 2012-12-31 (주) 해양비전21 The artificial fishing reef with flexibility for the construction of seaweed forest
US20140020283A1 (en) * 2010-06-17 2014-01-23 Bergen Teknologioverforing As Method
US10226032B2 (en) * 2010-06-17 2019-03-12 Bergen Teknologioverforing As Method for farming ascidians
CN109006584A (en) * 2018-07-18 2018-12-18 浙江海洋大学 A kind of circulating attached ovum device of reef formula suitable for cuttlefish reproduction and its application method
KR102600638B1 (en) * 2023-07-14 2023-11-09 곽철우 A device assembly for blocking access of sea urchin and a manufacturing method for the same

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