JP4024886B2 - Parasiticides for cultured fish and methods for controlling them - Google Patents
Parasiticides for cultured fish and methods for controlling them Download PDFInfo
- Publication number
- JP4024886B2 JP4024886B2 JP24891596A JP24891596A JP4024886B2 JP 4024886 B2 JP4024886 B2 JP 4024886B2 JP 24891596 A JP24891596 A JP 24891596A JP 24891596 A JP24891596 A JP 24891596A JP 4024886 B2 JP4024886 B2 JP 4024886B2
- Authority
- JP
- Japan
- Prior art keywords
- acid
- cultured fish
- fish
- seawater
- controlling
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Landscapes
- Farming Of Fish And Shellfish (AREA)
- Medicinal Preparation (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Description
【０００１】
【産業上の利用分野】
本発明は養殖魚に寄生する寄生虫の駆除剤に関する。
【０００２】
【従来の技術】
養殖魚のトラフグ、ハマチ、メバル、ヒラメ等に寄生虫が寄生すると成長が阻害され、食欲不振となり衰弱し商品価値が低下してしまう。ハダムシ、エラムシが主な寄生虫である。ハダムシは、魚の皮膚に吸鈎着し、魚の上皮細胞や色素胞を食害する。エラムシは魚の鰓葉に寄生し貧血という直接的病因作用で鰓が灰白色化し、食欲不振となり衰弱し、ひどい時は死に至ることもある。
【０００３】
これらの寄生虫を駆除する対策としては、淡水浴、濃塩水浴、薬浴の各方法が採用されている。魚を一旦取り上げ、止水中に収容して処理する方法である。淡水浴は、大量の淡水の供給・運搬が困難なため、実質上不可能である。濃塩水浴法は、魚が脱水症状を起こす危険性が高いことと、多量の食塩が必要なためにこれも不可能である。従って現在ではホルマリンを用いた薬浴法が採用されている。しかし、ホルマリンを用いた方法では、ハダムシの駆除は可能だがエラムシの駆除ができない欠点があるとともに、定期的なホルマリン処理により魚体中に蓄積され、異臭魚の発生する問題が起こっている。
【０００４】
ホルマリンは、生簀１台当り年間１０００Ｋｇも使用されており、処理後大量のホルマリンが海水中に投棄されており、近くの漁場の海産魚に対する影響も大きく、最近では多量のホルマリンが養殖中のアコヤ貝に蓄積され大量死するという事故も発生している。ホルマリンは呼吸器などの粘膜を刺激し、空気１ｌ中０．５ｍｇの存在で死に至ることもある。作業上も非常に危険な化合物である。従って、人体にも安全で海水中での分解性も良好、そして残留蓄積されることもなく、寄生虫を駆除できるような薬剤の開発が切望されている。
【０００５】
【発明が解決しようとする課題】
本発明の目的は、海水中での分解性が良好で海産生物に残留蓄積されないような、安全で効果の高い養殖魚の寄生虫駆除剤を提供することにある。
【０００６】
【課題を解決するための手段】
上記の問題を解決するために鋭意研究を進めた結果、ｐＨ３．０〜５．０に調整してなる海水中にて、養殖魚を浸漬処理することにより寄生虫を駆除できることを見いだした。ｐＨを調整する物質としては、クエン酸・リンゴ酸・コハク酸・イタコン酸・グルコン酸・乳酸・メタンスルホン酸・酒石酸・フマル酸・プロピオン酸・アジピン酸・グルタル酸・フィチン酸・レブリン酸・アスコルビン酸・エリソルビン酸・ピルビン酸・マロン酸・クロトン酸・硝酸・硫酸・塩酸、が使用できる。これらの物質は、食品中に含有するものや、食品添加物として認められたものであり、安全性も高く、海水中での分解性も良好である。又、ｐＨ３．０〜５．０の海水中にて養殖魚を浸漬処理する時に、水溶性高分子を含有させておくと、処理中の養殖魚の状態が非常に良好で、酸に対する負荷を軽減することができる。水溶性高分子としては、ゼラチン・キトサン・メチルセルロース・アルギン酸ソーダ・寒天・ポリアクリル酸ナトリウム・天然の粘質成分等があげられるが、特に限定されるものではない。処理時には、空気又は酸素を通気しながら行う方がより好ましい。
【０００７】
試験１に示しているように、各種の酸を用いてｐＨ３．２に調整した液で寄生虫付着トラフグを浸漬処理すると、トラフグの生存範囲内でハダムシを駆除することができる。試験３より、ｐＨが２．５以下になると、ハダムシ駆除時間とトラフグの死ぬ時間が同一となり駆除できる時間がなくなってしまう。又、ｐＨ６．０以上になると、３時間でもハダムシを駆除することができない。従ってｐＨ３．０〜ｐＨ５．０に調整した海水中で浸漬処理することにより、トラフグを傷めることなくハダムシを駆除することができる。
試験４より、本発明はハダムシだけでなくエラムシも駆除できることがわかる。又、試験５に示しているように、水溶性高分子を酸と併用すると、処理中の魚の状態も良好で、処理後海水に戻した時もすぐに泳ぎだす程、魚への安全性が高くなる。
【０００８】
（試験１）
１００ｌのポリ容器に８０ｌの海水を入れ、各酸物質をｐＨ３．２になるように添加混溶した後、ハダムシが寄生している養殖トラフグを２匹投入し、ハダムシがトラフグから脱落し死滅する時間を調査した。
又、一定時間処理した後、海水に戻し４８時間後の状態を観察しトラフグへの影響を調査した。処理時の水温は２５℃で行った。結果は表１に示す。
【０００９】
【表１】
（試験２）
各酸物質を２種類使用し、ｐＨ３．０〜５．０の間に調整し、その他は試験例１と同様にしてハダムシ駆除試験を行った。結果は表２に示す。
【００１１】
【表２】
（試験３）
プロピオン酸を用いてｐＨ２．５〜６．０の間に調整し、その他は試験１と同様にしてハダムシ駆除試験を行った。結果は表３に示す。
【００１３】
【表３】
（試験４）
１００ｌのポリ容器に８０ｌの海水を入れ、プロピオン酸を添加して、ｐＨ３．５及び４．０に調整した後、エラムシの寄生したトラフグからエラムシを採取し、浸漬処理し死滅する時間を調査した。結果は表４に示す。
【００１５】
【表４】
（試験５）
１００ｌのポリ容器に８０ｌの海水を入れ、プロピオン酸を添加してｐＨ４．５に調整した後、ゼラチンを０．０１ｗ／ｖ％又は０．１ｗ／ｖ％になるように添加溶解し処理液２検体を調整した。次に、プロピオン酸を添加しｐＨ４．５にしたものを調整し、比較試験区とした。これらの３処理区に、ハダムシが寄生している養殖トラフグを２匹投入し、ハダムシの駆除時間と、トラフグの状態を観察した。処理時の水温は２５℃で行った。結果は表５に示す。
【００１７】
【表５】
【発明の効果】
クエン酸・リンゴ酸・コハク酸・イタコン酸・プロピオン酸等の特定の酸によりｐＨ３．０〜５．０に調整してなる海水中にて養殖魚を浸漬処理することにより、寄生虫を駆除することができる。[0001]
[Industrial application fields]
The present invention relates to a parasite-controlling agent parasitic on farmed fish.
[0002]
[Prior art]
If parasites infest the farmed fish, such as trough puffer fish, yellowtail, sea bream, and Japanese flounder, the growth is inhibited, the appetite is weakened, and the product value is reduced. Hadamushi and aphids are the main parasites. The damselfly adsorbs on the skin of the fish and eats the fish epithelial cells and pigment vesicles. The aphids parasitize the fish leaves, and the angiogenesis is a direct etiological effect that turns the sharks off white, causing loss of appetite and debilitating.
[0003]
As countermeasures against these parasites, fresh water bath, concentrated salt water bath, and medicine bath are employed. This is a method of picking up fish once and storing it in still water. A fresh water bath is virtually impossible because it is difficult to supply and transport a large amount of fresh water. Concentrated salt bathing is not possible due to the high risk of fish dehydration and the need for large amounts of salt. Therefore, the chemical bath method using formalin is currently employed. However, the method using formalin has the disadvantages that it is possible to control hard beetles but cannot control the aphids, and there is a problem in that it is accumulated in the fish body by regular formalin treatment to generate off-flavor fish.
[0004]
Formalin is used at an annual rate of 1000 kg per ginger, and after treatment, a large amount of formalin is dumped in the seawater, which has a great impact on marine fish at nearby fishing grounds. Recently, a large amount of formalin is being cultivated in Akoya. There have also been accidents involving the accumulation of shellfish and death. Formalin stimulates mucous membranes such as the respiratory tract and may be fatal in the presence of 0.5 mg in 1 liter of air. It is a very dangerous compound for work. Accordingly, there is an urgent need to develop a drug that is safe for the human body, has good degradability in seawater, and does not accumulate and can be used to combat parasites.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a safe and highly effective parasite control agent for cultured fish that has good degradability in seawater and does not accumulate in sea products.
[0006]
[Means for Solving the Problems]
As a result of diligent research to solve the above problems, it has been found that parasites can be controlled by immersing cultured fish in seawater adjusted to pH 3.0 to 5.0. Substances that adjust pH include citric acid, malic acid, succinic acid, itaconic acid, gluconic acid , lactic acid, methanesulfonic acid, tartaric acid, fumaric acid, propionic acid, adipic acid, glutaric acid, phytic acid, levulinic acid, ascorbine acid erythorbic acid, pyruvic acid, malonic acid, crotonic acid, nitric acid, and sulfuric acid and hydrochloric acid, can be used. These substances are those contained in foods and recognized as food additives, and have high safety and good degradability in seawater. In addition, when immersing cultured fish in seawater with a pH of 3.0 to 5.0, if the water-soluble polymer is included, the state of the cultured fish being treated is very good and the load on acid is reduced. can do. Examples of the water-soluble polymer include gelatin, chitosan, methylcellulose, sodium alginate, agar, sodium polyacrylate, natural viscous components, and the like, but are not particularly limited. It is more preferable to carry out the treatment while ventilating air or oxygen.
[0007]
As shown in Test 1, when a parasite-attached trough puffer is dipped in a solution adjusted to pH 3.2 using various acids, it is possible to eliminate the beetle within the trough puffer's survival range. From the test 3, when the pH is 2.5 or less, the time for removing the dam and the time for trough puffing is the same, and there is no time for the removal. Moreover, if it becomes pH 6.0 or more, it will be impossible to get rid of it. Therefore, by carrying out the immersion treatment in seawater adjusted to pH 3.0 to pH 5.0, it is possible to remove the beetle without damaging the trough.
From Test 4, it can be seen that the present invention can eliminate not only hard beetles but also aphids. In addition, as shown in Test 5, when a water-soluble polymer is used in combination with an acid, the condition of the fish being treated is good, and the fish is safe enough to swim immediately when returned to seawater after treatment. Get higher.
[0008]
(Test 1)
Add 80 liters of seawater to a 100 liter plastic container, add and mix each acid substance to pH 3.2, and then add 2 cultured trough puffers that are parasitized. Investigate time.
Moreover, after processing for a fixed time, it returned to seawater and the state 48 hours after was observed, and the influence on a trough puffer was investigated. The water temperature during the treatment was 25 ° C. The results are shown in Table 1.
[0009]
[Table 1]
(Test 2)
Two kinds of each acid substance were used, adjusted to pH 3.0 to 5.0, and others were subjected to the Hadamushi control test in the same manner as in Test Example 1. The results are shown in Table 2.
[0011]
[Table 2]
(Test 3)
The control was carried out in the same manner as in Test 1 except that the pH was adjusted between 2.5 and 6.0 using propionic acid. The results are shown in Table 3.
[0013]
[Table 3]
(Test 4)
After adding 80 l of seawater to a 100 l plastic container and adding propionic acid to adjust the pH to 3.5 and 4.0, the aphids were collected from trough pufferfish that were parasitized by the aphids, and the time to kill them by immersion treatment was investigated. . The results are shown in Table 4.
[0015]
[Table 4]
(Test 5)
Add 80 l of seawater to a 100 l plastic container, add propionic acid to adjust the pH to 4.5, add and dissolve gelatin to 0.01 w / v% or 0.1 w / v% The specimen was adjusted. Next, what adjusted the pH to 4.5 by adding propionic acid was prepared, and it was set as the comparative test group. Two cultured trough puffer fishes parasitized with stag beetles were introduced into these three treatment areas, and the control time of the stag beetles and the state of tiger puffers were observed. The water temperature during the treatment was 25 ° C. The results are shown in Table 5.
[0017]
[Table 5]
【The invention's effect】
Exterminate parasites by immersing cultured fish in seawater adjusted to pH 3.0-5.0 with specific acids such as citric acid, malic acid, succinic acid, itaconic acid, propionic acid be able to.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24891596A JP4024886B2 (en) | 1996-08-29 | 1996-08-29 | Parasiticides for cultured fish and methods for controlling them |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24891596A JP4024886B2 (en) | 1996-08-29 | 1996-08-29 | Parasiticides for cultured fish and methods for controlling them |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1072344A JPH1072344A (en) | 1998-03-17 |
| JP4024886B2 true JP4024886B2 (en) | 2007-12-19 |
Family
ID=17185324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24891596A Expired - Fee Related JP4024886B2 (en) | 1996-08-29 | 1996-08-29 | Parasiticides for cultured fish and methods for controlling them |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4024886B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002338538A (en) * | 2001-05-21 | 2002-11-27 | Takeda Schering-Plough Animal Health Kk | New sulfonamide derivative and antiparasitic agent containing the same and used for fishes |
| JP4154326B2 (en) * | 2001-06-14 | 2008-09-24 | 第一製網株式会社 | Parasiticides for cultured fish |
| JP4976006B2 (en) * | 2005-03-29 | 2012-07-18 | 日本水産株式会社 | Parasitic disease prevention and treatment method for marine fish |
| WO2009022424A1 (en) * | 2007-08-16 | 2009-02-19 | National University Corporation Kochi University | Agent for exterminating pathogenic bacteria in fishes and method of exterminating the same |
| JP5270135B2 (en) * | 2007-11-16 | 2013-08-21 | タテホ化学工業株式会社 | Fish disease treatment |
-
1996
- 1996-08-29 JP JP24891596A patent/JP4024886B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1072344A (en) | 1998-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2005082071A2 (en) | Antimicrobial food additive and treatment for cooked food, water and wastewater | |
| FI59015B (en) | DESINFICERING AV OCH AVLAEGSNANDE AV MICRO-ORGANISM FRAON MUSSLOR SKALDJUR OCH FISK | |
| JP4024886B2 (en) | Parasiticides for cultured fish and methods for controlling them | |
| JP4225385B2 (en) | Disinfectant for fish pathogenic bacteria and method for the disinfection | |
| JP4859060B2 (en) | How to remove Caligus | |
| EP0944305A1 (en) | Use of peracetic acid in fish farming | |
| JP4082528B2 (en) | Parasiticides for cultured fish | |
| JP4154326B2 (en) | Parasiticides for cultured fish | |
| KR20100061685A (en) | Agent for exterminating pathogenic bacteria in fishes and method of exterminating the same | |
| JP2000128702A (en) | Parasiticide in hatchery fish | |
| JP6733095B2 (en) | How to save fish | |
| JP2000016937A (en) | Parasiticide for hatchery fish | |
| KR100991081B1 (en) | Exfoliating method of gastropods | |
| EP0786936B1 (en) | Method for reducing bacterial contamination in an aquaculture | |
| Baylina et al. | Collection, transport and husbandry of the blue shark, Prionace glauca | |
| JP3610928B2 (en) | Treatment agent for cultured seaweed and treatment method | |
| WO1998054958A1 (en) | Compositions and methods for sedating, anaesthetising and euthanising aquatic organisms | |
| JP6103452B2 (en) | Saltwater fish that have been treated with a method to prolong the life of saltwater fish and / or recover from trauma | |
| JP2006077000A (en) | Method for exterminating fish parasite and method for preventing infection | |
| EP1658776A1 (en) | Method for producing live food water organisms in the presence of an antibacterial | |
| JP5803026B2 (en) | Method for prolonging life and / or injury of saltwater fish, and saltwater fish treated by this method | |
| JP2000256106A (en) | Algaecide/germicide for cultivated laver and method for treating cultivated laver using the same | |
| WO1995017176A1 (en) | Methods for sedating and anaesthetising aquatic organisms | |
| JP2010088352A (en) | Method for exterminating zeuxapta japonica | |
| JP2004033052A (en) | Shellfish freshness-maintaining method and freshness-maintaining solution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070626 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070827 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070925 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20070829 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20071004 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101012 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111012 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111012 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121012 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131012 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |