JPH0550840B2 - - Google Patents
Info
- Publication number
- JPH0550840B2 JPH0550840B2 JP61012679A JP1267986A JPH0550840B2 JP H0550840 B2 JPH0550840 B2 JP H0550840B2 JP 61012679 A JP61012679 A JP 61012679A JP 1267986 A JP1267986 A JP 1267986A JP H0550840 B2 JPH0550840 B2 JP H0550840B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- fish
- shellfish
- electric screen
- potential
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000013535 sea water Substances 0.000 claims description 12
- 241000251468 Actinopterygii Species 0.000 description 27
- 235000015170 shellfish Nutrition 0.000 description 23
- 230000009182 swimming Effects 0.000 description 8
- 206010033799 Paralysis Diseases 0.000 description 5
- 238000009360 aquaculture Methods 0.000 description 5
- 244000144974 aquaculture Species 0.000 description 5
- 230000000638 stimulation Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 231100000862 numbness Toxicity 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010003497 Asphyxia Diseases 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Landscapes
- Farming Of Fish And Shellfish (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、魚貝類を養殖する場合に、海水中
における魚貝類の遊泳遮断用の電気スクリーンを
発生する電気スクリーン発生装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric screen generating device for generating an electric screen for blocking the swimming of fish and shellfish in seawater when cultivating fish and shellfish.
一般に魚貝類を養殖する場合、海水中にいけす
を設け、該いけす内において魚貝類の養殖を行な
つており、通常海水中に網を張りめぐらしていけ
すを形成し、網によりいけすの外側への魚貝類の
脱出やいけすの内側への魚貝類の侵入を阻止して
いるが、養殖初期の段階では、養殖魚はまだ体長
数cmの稚魚であり、これらの稚魚の遊泳を遮断す
るためには、海水中に配設すべき網として非常に
目の細かいものを用いる必要がある。
Generally, when cultivating fish and shellfish, a cage is set up in seawater, and the fish and shellfish are cultured within the cage. Usually, a net is stretched around the seawater to form a cage, and the net is used to extend the fish and shellfish to the outside of the cage. This prevents fish and shellfish from escaping and entering the inside of the cage, but at the early stage of aquaculture, farmed fish are still young fish with a body length of several centimeters, and in order to prevent the swimming of these young fish, it is necessary to prevent them from swimming. , it is necessary to use a very fine mesh net to be placed in seawater.
ところが、潮汐変化が数ｍもあるような海域で
は、網が破損し易く、わずかな破損でも稚魚の場
合には容易に脱出できるため、網の保守、維持に
多大な労力と費用を要するという不都合が生じ
る。 However, in sea areas where tidal changes can be as large as several meters, the nets are easily damaged, and even if the damage is slight, young fish can easily escape, resulting in the inconvenience of requiring a great deal of effort and expense to maintain and maintain the nets. occurs.
そこで、通常いけすを設ける海域として、水深
が深過ぎず、波が穏やかで潮汐変化の少ないとこ
ろが選定されるが、このような条件を満たす海域
であつても、台風等による網の流失や船舶の接触
による網の破損が発生することがあり、やはり網
の保守、維持に多大な労力、費用を要し、網によ
り確実に魚貝類の遊泳を遮断することができない
という問題点がある。
Therefore, areas where the water is not too deep, where the waves are calm, and where there are few tidal changes are usually selected as the areas where the fish cages are installed. However, even in areas that meet these conditions, nets may be washed away by typhoons or ships may be lost. The net may be damaged due to contact, and maintenance and upkeep of the net requires a great deal of effort and expense, and there are problems in that the net cannot reliably block swimming of fish and shellfish.
また、海洋牧場のように大規模な養殖を行なう
場合には、使用する網の全長が非常に長いものに
なり、網の保守、維持に要する労力、費用もそれ
だけ多大になり、魚貝類の遊泳遮断に網を用いる
ことは、大規模養殖の場合最良の方策とは言えな
い。 In addition, when carrying out large-scale aquaculture such as at marine farms, the total length of the nets used is extremely long, and the labor and expense required to maintain and maintain the nets are correspondingly large. Using nets for isolation is not the best strategy for large-scale aquaculture.
したがつて、この発明は、潮位、潮汐などの海
洋条件や台風などの気象条件に左右されることな
く、確実に魚貝類の遊泳を遮断できるようにする
ことを技術的課題とする。 Therefore, the technical problem of this invention is to ensure that swimming of fish and shellfish can be blocked without being affected by ocean conditions such as tide levels and tides, or weather conditions such as typhoons.
この発明は、前記の点に留意してなされたもの
であり、海水中にそれぞれ複数個の導電電極がほ
ぼ等間隔に配列されて形成され互いに平行に配設
された３列の電極列と、前記各電極列それぞれの
前記各導電電極を互いに電気的に接続した接続体
と、両側の前記電極列が低電位になり中央の前記
電極列が高電位になるように、前記各電極列間に
電圧を印加する電気スクリーン発生用の電源とを
備えたことを特徴とする電気スクリーン発生装置
である。
This invention has been made with the above-mentioned points in mind, and includes three rows of electrodes each formed in seawater with a plurality of conductive electrodes arranged at approximately equal intervals and arranged in parallel to each other; A connecting body electrically connects the conductive electrodes of each of the electrode rows to each other, and a connector between the electrode rows so that the electrode rows on both sides have a low potential and the center electrode row has a high potential. The present invention is an electric screen generating device characterized in that it is equipped with a power source for generating an electric screen that applies a voltage.
そして、この発明では、海水中に互いに平行に
配設された各電極列間に、両側の電極列が低電位
になり中央の電極列が高電位になるように電気ス
クリーン発生用電源により電圧が印加され、海水
中の各電極列間に２重の電気スクリーンが形成さ
れ、当該電気スクリーンに侵入する魚貝類は電気
的刺激を受けて軽い痺れや麻痺などの反応を示
し、当該電気スクリーンを遊泳通過することがで
きなくなり、従来のように網を用いることなく魚
貝類の遊泳が確実に遮断され、潮位、潮汐、水深
などの海洋条件や台風などの気象条件に左右され
ることもなく、海洋牧場などの大規模な養殖に非
常に適している。
In this invention, a voltage is applied between each electrode row arranged parallel to each other in seawater by an electric screen generation power source so that the electrode rows on both sides are at a low potential and the center electrode row is at a high potential. A double electrical screen is formed between each row of electrodes in the seawater, and fish and shellfish that enter the electrical screen react by receiving electrical stimulation, such as mild numbness or paralysis, and are unable to swim through the electrical screen. This means that the swimming of fish and shellfish is reliably blocked without using nets as in the past, and it is not affected by ocean conditions such as tide level, tide, water depth, or weather conditions such as typhoons. It is very suitable for large-scale aquaculture such as on farms.
つぎに、この発明を、その１実施例を示した図
面とともに詳細に説明する。
Next, the present invention will be described in detail with reference to drawings showing one embodiment thereof.
まず、この発明の原理について説明する。 First, the principle of this invention will be explained.
いま、たとえば第３図に示すように海水中に３
個の電極Ａ，Ｂ，Ｃを平行に配設し、両側の電極
Ａ，Ｃが低電位になり中央の電極Ｂが高電位にな
るように、各電極Ａ〜Ｃ間に電圧を印加して所定
の電位傾斜を有する２重の電気スクリーンを形成
する。 Now, for example, as shown in Figure 3, there are three
Electrodes A, B, and C are arranged in parallel, and a voltage is applied between each electrode A to C so that electrodes A and C on both sides have a low potential and electrode B in the center has a high potential. A double electrical screen with a predetermined potential gradient is formed.
このとき、電極ＡからＢまでの距離をL1、電
極ＢからＣまでの距離をL2とし、電極Ｂの電位
をV0とすると、各電極Ａ〜Ｃ間の電位分布は第
４図に示すようになり、電極Ａ，Ｂ間の電位傾斜
E1はE1≒V0／L1、電極Ｂ，Ｃ間の電位傾斜E2は
E2≒V0／L2となる。 At this time, if the distance from electrode A to B is L1 , the distance from electrode B to C is L2 , and the potential of electrode B is V0 , the potential distribution between each electrode A to C is shown in Figure 4. As shown, the potential gradient between electrodes A and B
E 1 is E 1 ≒ V 0 /L 1 , and the potential gradient E 2 between electrodes B and C is
E 2 ≒V 0 /L 2 .
そして、各電極Ａ〜Ｃ間の電気スクリーンの電
位傾斜E1，E2が小さければ、魚貝類は驚く程度
の反応しか示さず、電位傾斜E1，E2が大きくな
るに連れて軽い痺れや麻痺さらには仮死、致死な
どの反応を示すようになり、異なる電位傾斜E1，
E2の組み合わせにより、魚貝類に与える電気的
刺激の度合の異なつた２重の電気スクリーンが形
成されることになる。 If the potential gradients E 1 and E 2 of the electric screen between electrodes A to C are small, fish and shellfish will only show a surprising reaction, and as the potential gradients E 1 and E 2 increase, they will experience slight numbness and numbness. It begins to show reactions such as paralysis, asphyxia, and death, with different potential gradients E 1 ,
The combination of E 2 results in the formation of a dual electric screen that provides different degrees of electrical stimulation to fish and shellfish.
そこで、第１図に示すように、海水中に複数個
の棒状の導電電極１ａをほぼ等間隔に配設して第
１電極列２ａを形成し、同様に海水中に複数個の
棒状の導電電極１ｂおよび１ｃをそれぞれ等間隔
に配列して第２、第３電極列２ａ，２ｃを形成す
るとともに、各電極列２ａ，２ｂ，２ｃが互いに
平行になり、かつ各電極列２ａ，２ｂ，２ｃ間の
間隔が異なるように各電極列２ａ，２ｂ，２ｃを
配設し、各電極列２ａ，２ｂ，２ｃそれぞれの各
導電電極１ａ，１ｂ，１ｃを接続体３ａ，３ｂ，
３ｃにより互いに電気的に接続し、両側の第１、
第３電極列２ａ，２ｃを低電位側すなわちアース
側として、接続体３ａ，３ｃに接続された第１端
子４ａと接続体３ｂに接続された第２端子４ｂと
の間に、図示されていない電気スクリーン発生用
電源によりたとえば直流電圧を印加し、各電極列
２ａ〜２ｃ間にいわば電位傾斜の異なる２重の電
気スクリーンを形成する。 Therefore, as shown in FIG. 1, a plurality of rod-shaped conductive electrodes 1a are arranged in seawater at approximately equal intervals to form a first electrode row 2a, and a plurality of rod-shaped conductive electrodes 1a are similarly arranged in seawater at approximately equal intervals. Electrodes 1b and 1c are arranged at equal intervals to form second and third electrode rows 2a and 2c, and each electrode row 2a, 2b and 2c is parallel to each other and each electrode row 2a, 2b and 2c is arranged at equal intervals. The electrode rows 2a, 2b, 2c are arranged so that the intervals between the electrode rows 2a, 2b, 2c are different, and the conductive electrodes 1a, 1b, 1c of the electrode rows 2a, 2b, 2c are connected to the connecting bodies 3a, 3b,
3c, the first,
The third electrode rows 2a, 2c are set to the low potential side, that is, the ground side, and a connection (not shown) is made between the first terminal 4a connected to the connecting bodies 3a, 3c and the second terminal 4b connected to the connecting body 3b. For example, a DC voltage is applied by a power source for generating an electric screen, and a so-called double electric screen with different potential gradients is formed between each electrode row 2a to 2c.
このとき、当該電気スクリーンにより、特定の
範囲を囲むように各電極列２ａ〜２ｃを海水中に
配設すれば、当該電気スクリーンで囲まれた範囲
内からの魚貝類の脱出および当該電気スクリーン
で囲まれた範囲内への魚貝類の侵入が確実に阻止
され、魚貝類は当該電気スクリーンを遊泳通過す
ることができず、当該電気スクリーンで囲まれた
範囲内に魚貝類が閉じ込められることになる。 At this time, if each electrode row 2a to 2c is placed in the seawater so as to surround a specific area with the electric screen, fish and shellfish can escape from the area surrounded by the electric screen and Entry of fish and shellfish into the enclosed area is reliably prevented, fish and shellfish cannot swim through the electric screen, and fish and shellfish are confined within the area surrounded by the electric screen. .
そして、たとえば各導電電極１ａ，１ｂ，１ｃ
として直径30mmの銅パイプを用い、これらを75cm
間隔で配列して各電極列２ａ〜２ｃを形成し、第
１電極列２ａから第２電極列２ｂまでの距離を
150cm、第２電極列２ｂから第３電極列２ｃまで
の距離を50cmとし、第２電極列２ｂの電位を15V
としたときの各電極列２ａ〜２ｃ間の電位分布は
第２図に示すようになり、第１、第２電極列２
ａ，２ｂ間の中間位置での電位傾斜はほぼ
0.08V／cm、第２、第３電極列２ｂ，２ｃ間の中
間位置での電位傾斜はほぼ0.16V／cmとなり、電
位傾斜の小さい第１、第２電極列２ａ，２ｂ間に
侵入した魚貝類は驚いてすぐに逃げ出し、電位傾
斜の大きい第２、第３電極列２ｂ，２ｃ間に侵入
した魚貝類は麻痺や仮死などの反応を示した。た
だし、第２図の横軸は第１電極列２ａからの距離
を示している。 For example, each conductive electrode 1a, 1b, 1c
Using copper pipes with a diameter of 30 mm, these are 75 cm
The electrode rows 2a to 2c are arranged at intervals, and the distance from the first electrode row 2a to the second electrode row 2b is
150cm, the distance from the second electrode row 2b to the third electrode row 2c is 50cm, and the potential of the second electrode row 2b is 15V.
When this happens, the potential distribution between each electrode row 2a to 2c is as shown in FIG.
The potential gradient at the intermediate position between a and 2b is approximately
0.08V/cm, and the potential gradient at the intermediate position between the second and third electrode rows 2b and 2c is approximately 0.16V/cm. The shellfish were startled and immediately ran away, and the fish and shellfish that entered between the second and third electrode rows 2b and 2c, which had a large potential gradient, showed reactions such as paralysis and asphyxia. However, the horizontal axis in FIG. 2 indicates the distance from the first electrode row 2a.
ここで、麻痺あるいは仮死状態の魚貝類は前記
電気スクリーン外に出ると、しばらくすれば麻
痺、仮死状態から元の正常状態に復帰する。 Here, when the paralyzed or asphyxic fish and shellfish come out of the electric screen, the paralyzed or asphyxic state returns to its original normal state after a while.
なお、各導電電極１ａ，１ｂ，１ｃは前記した
棒状のものに限るものではない。 Note that the conductive electrodes 1a, 1b, and 1c are not limited to the rod-shaped ones described above.
また、電気スクリーン発生用電源により各電極
列２ａ〜２ｃ間に交流電圧またはパルス電圧を印
加してもよいのは勿論である。 Furthermore, it goes without saying that an AC voltage or a pulse voltage may be applied between each of the electrode rows 2a to 2c using a power source for generating an electric screen.
以上のように、この発明の電気スクリーン発生
装置によると、海水中に平行に第１〜第３電極列
２ａ〜２ｃを配設し、電気スクリーン発生用の電
源により各電極列２ａ〜２ｃ間に、両側の第１、
第３電極列２ａ，２ｃが低電位に、かつ中央の第
２電極列２ｂが高電位になるように電圧を印加
し、２重の電気スクリーンを発生するため、当該
電気スクリーンに侵入した魚貝類に電気的刺激を
与えて遊泳通過を阻止することができ、従来の網
を用いる場合のように、潮位、潮汐、水深などの
海洋条件や台風などの気象条件に左右されること
なく、確実に魚貝類の遊泳を遮断することが可能
となり、網の保守に要していた労力、費用を軽減
することができ、海洋牧場などの大規模な養殖に
非常に有効であり、この効果は極めて大きい。
As described above, according to the electric screen generator of the present invention, the first to third electrode rows 2a to 2c are arranged in parallel in seawater, and the electric screen generation power source is used to connect each electrode row 2a to 2c. , the first on both sides,
A voltage is applied so that the third electrode rows 2a and 2c have a low potential and the central second electrode row 2b has a high potential to generate a double electric screen, so that fish and shellfish that have invaded the electric screen are It is possible to prevent swimming from passing by by applying electrical stimulation to the net, and unlike when using conventional nets, it is not affected by ocean conditions such as tide level, tide, water depth, etc., or weather conditions such as typhoons, and is reliable. It becomes possible to block the swimming of fish and shellfish, reducing the labor and cost required for maintaining nets, making it extremely effective for large-scale aquaculture such as marine farms, and this effect is extremely large. .
さらに、各電極列２ａ，２ｂ，２ｃ間の距離を
適宜調整することにより、各電極列２ａ，２ｂ，
２ｃ間の電位傾斜を制御でき、魚貝類に与える電
気的刺激の度合を調節することができ、養殖魚貝
類を損傷することなく確実に保護することが可能
となる。 Furthermore, by appropriately adjusting the distance between each electrode row 2a, 2b, 2c, each electrode row 2a, 2b,
It is possible to control the potential gradient between 2c and adjust the degree of electrical stimulation given to fish and shellfish, making it possible to reliably protect farmed fish and shellfish without damaging them.
図面は、この発明の電気スクリーン発生装置の
１実施例を示し、第１図は斜視図、第２図は各電
極列間の電位分布図、第３図は原理説明図、第４
図は第３図の各電極間の電位分布図である。
１ａ，１ｂ，１ｃ……導電電極、２ａ，２ｂ，
２ｃ……電極列、３ａ，３ｂ，３ｃ……接続体。
The drawings show one embodiment of the electric screen generator of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a potential distribution diagram between each electrode row, Fig. 3 is a diagram explaining the principle, and Fig. 4
The figure is a potential distribution diagram between each electrode in FIG. 3. 1a, 1b, 1c...conductive electrode, 2a, 2b,
2c...electrode row, 3a, 3b, 3c...connection body.
Claims (1)
間隔に配列されて形成され互いに平行に配設され
た３列の電極列と、前記各電極列それぞれの前記
各導電電極を互いに電気的に接続した接続体と、
両側の前記電極列が低電位になり中央の前記電極
列が高電位になるように、前記各電極列間に電圧
を印加する電気スクリーン発生用の電源とを備え
たことを特徴とする電気スクリーン発生装置。1. Three rows of electrodes formed in seawater with a plurality of conductive electrodes arranged at approximately equal intervals and arranged in parallel to each other, and the conductive electrodes of each of the electrode rows are electrically connected to each other. a connecting body,
An electric screen comprising a power source for generating an electric screen that applies a voltage between each of the electrode rows so that the electrode rows on both sides have a low potential and the center electrode row has a high potential. Generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61012679A JPS62170195A (en) | 1986-01-23 | 1986-01-23 | Electric screen creating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61012679A JPS62170195A (en) | 1986-01-23 | 1986-01-23 | Electric screen creating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62170195A JPS62170195A (en) | 1987-07-27 |
| JPH0550840B2 true JPH0550840B2 (en) | 1993-07-30 |
Family
ID=11812063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61012679A Granted JPS62170195A (en) | 1986-01-23 | 1986-01-23 | Electric screen creating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62170195A (en) |
-
1986
- 1986-01-23 JP JP61012679A patent/JPS62170195A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62170195A (en) | 1987-07-27 |
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