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Method of removing parasites on body surface of fishes

A technology for parasites and fish, applied in the field of expelling parasites from the body of fish, can solve problems such as unspecified solutions and legacy

Inactive Publication Date: 2009-07-29
NIPPON SUISAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, although Non-Patent Document 1 shows that there are still many problems remaining in completely eradicating the external parasitic skin fluke (Benedenia) of fish, it does not explain its solution

Method used

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  • Method of removing parasites on body surface of fishes
  • Method of removing parasites on body surface of fishes
  • Method of removing parasites on body surface of fishes

Examples

Experimental program
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Effect test

Embodiment 1

[0051]

[0052] Test method: 60 flounder with an average fish weight of about 78g were raised in a 200-liter water tank for about 7 days, and acclimated at a water temperature of 25°C. The bait therein is commercially available feed, so that the bait rate is 1.5% of the fish body weight. Water injection was 2.4 liters / minute. Parasite infection was carried out as follows: 200 liters of water tank was made into still water, about 12,000 Neobenedenia hatching larvae were thrown in, and fish were exposed to parasites for 1 hour. After infection, put 10 in each of six 100-liter tanks. Water injection during feeding was 1.2 L / min. The commercially available feed was given within 7 days after making it infected, and the feeding rate was 1.5% of the fish body weight. 8 to 10 days after infection, the test feed was given to each area. The feeding rate of the test feed was 1% of the fish body weight. On the 11th day after the infection, all the fish were sampled, and Neobenedeni...

Embodiment 2

[0057]

[0058] Test method: 50 flounder with an average fish weight of about 29g were raised in a 200-liter water tank for about 7 days, and acclimatized at a water temperature of 25°C. The bait therein is commercially available feed, so that the bait rate is 1.5% of the fish body weight. Water injection was 2.4 liters / minute. The parasite infection was carried out as follows: a 200-liter tank was made into still water, about 10,000 Neobenedenia hatching larvae were thrown in, and the fish were exposed to the parasite for 1 hour. After infection, store 10 in each of five 100-liter tanks. Water injection during feeding was 1.2 L / min. The commercially available feed was given within 7 days after making it infected, and the feeding rate was 1.5% of the fish body weight. 8 to 10 days after infection, the test feed was given to each area. The feeding rate of the test feed was 1%. On the 11th day after making it infected, all the fish were used as samples to count the Neoben...

Embodiment 3

[0063]

[0064] Test method: 50 amberjacks with an average fish weight of about 24 g were raised in a 200-liter water tank for about 7 days, and acclimatized at a water temperature of 25°C. The bait therebetween is a commercially available feed, so that the bait rate is 4% of the fish body weight. Water injection was 2.4 liters / minute. The parasite infection was carried out as follows: a 200-liter tank was made into still water, about 10,000 Neobenedenia hatching larvae were thrown in, and the fish were exposed to the parasite for 1 hour. After infection, store 10 in each of five 100-liter tanks. Water injection during feeding was 1.2 L / min. Commercially available feed was given within 7 days after making it infected, and the feeding rate was 4% of the fish's body weight. 8 to 10 days after infection, the test feed was given to each area. The feeding rate of the test feed was 2% of the fish body weight. On the 11th day after making it infected, all the fish were used as ...

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Abstract

Parasites on the body surface of fishes are removed without causing side effects by orally administering bithionol to fishes in an amount of 50 to 250 mg / kg of body weight per day. Bithionol is orally administered for 1 to 3 days every day or every other day. This method is suitable for fishes of the order Perciformes, Pleuronectiformes and Tetraodontiformes such as amberjack, yellow tail, Seriola lalandi, Seriola rivoliana Valenciennes, cobia, common horse mackerel, Japanese horse mackerel, Japanese seaperch, Pagrus major, Zebrasoma flavescens, Epinephelus akaara, Epinephelus bruneus, Japanese flounder, Verasper moseri, Takifugu rubripes,Oplegnathus fasciatus, Oplegnathus punctatus, Scomber japonicus, threadsail filefish, Scophthalmus aquosus and tilapia, which are parasitized with Neobenedenia girellae. When removing parasites on the body surface of fishes, feed for fish culture supplemented with a necessary amount of bithionol can be used.

Description

technical field [0001] The present invention relates to a method for expelling parasites from fish (especially farmed fish) and a feed for fish farming for expelling parasites. Specifically, it relates to a method for expelling ectoparasites such as Neobenedenia and Benedenia by oral administration of a chemical, and related fish feed for expelling parasites. Background technique [0002] In sea surface culture, since parasitic diseases hinder stable production, they become a very serious problem. Among parasitic diseases, skin fluke infection in particular occurs in any Japanese amberjack farms in Japan, and is an infectious disease that has become one of the biggest problems in the five amberjack farming. The parasites commonly referred to as skin flukes (Hadamshi) include Neobenedenia (Platezoa, Monogeneta, Monopodes, Division Division, Neobenedenia girellae), Benedenia (Platezoa Phylum Monogenetic trematodes, subdivided Amberjack (Benedenia seriolae), etc., known to pa...

Claims

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Application Information

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IPC IPC(8): A61K31/10A23K1/16A01N31/16A61P33/14A01P7/04
CPCA01N31/16A23K1/188A23K1/1612A61K31/10A23K20/111A23K50/80A61P33/14
Inventor 平泽德高山下伸也
Owner NIPPON SUISAN KAISHA LTD
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