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Walter, T.C. & Boxshall, G. (). World of Copepods database. Argulus japonicus Thiele, Accessed through: World Register of Marine. Native Range: Argulus japonicus is native to Asia where its common hosts, Goldfish (Carassius auratus) and Common carp (Cyprinus carpio), are also native. Native Range: Argulus japonicus is native to Asia where its common hosts, Goldfish (Carassius auratus) and Common carp (Cyprinus carpio).

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In addition, the lobes are more pointed in A. This organism was removed with forceps and placed in a beaker of tank water.

Fish Lice (Argulus japonicus) in Goldfish (Carassius auratus).

Sign up for new issue notifications. More than different species of Argulus are distributed worldwide. Articles with ‘species’ microformats. The room is on a As soon as any Argulus organisms are identified, management and treatment are recommended because infections can escalate rapidly.

Argulus japonicus – Wikipedia

Acknowledgments We thank Jamieson Greaver for taking the pictures and Kelly Garner for her contribution in creating the figures. From Wikipedia, the free encyclopedia. Currently, there are no FDA-approved drugs for the control and treatment of this parasite, but several chemicals including organophosphates and diflubenzuron have been used with success.

Any further distribution of this work must maintain attribution to the author s and the title of the work, journal citation and DOI. Isr J Vet Med Argulus japonicus is a parasitic crustacean parasitizing the skin of warm water fishes. These parasites were removed and placed in the beaker with the first specimen. These goldfish were asymptomatic, and no additional cases were noted after manual removal of the lice.

Diseased fish exhibits inflammation and haemorrhage in the lesions.


These systems each comprise six to gallon tanks using a multistage filtration process and UV sterilization of filtered water. Health hazard Since this parasite is not infectious to human, it is harmless in food hygiene. Journal List Comp Med v. The first record of Argulus foliacesus Crustacea: Please review our privacy policy. To find out more, see our Privacy and Cookies policy.

It attaches itself to the gills, fins or skin of the host using its suckers, and then feeds by injecting a toxin into the host which pre-digests jaopnicus tissue. After eggs hatch in about 2 weeks or wrgulus at lower temperatureslarvae are only able to survive for 1—2 days before requiring nutrition from a host fish.

After the lice had been removed, all goldfish in the affected system were monitored daily for evidence of adult Argulus ; 10 mo later, no more fish lice were noted.

Branchlura on cod, Gadus morhuafrom Finnmark, northern Norway. The body length in female: Fish lice Argulus spp; family Argulidae are branchiuran crustaceans that parasitize both marine and freshwater fishes. Fish diseases and disorders2nd ed. All remaining fish in the system were inspected visually, and no other parasites were seen. In arguous, the parasite can be identified on wet mounts of affected tissue. Maxillopoda Parasitic crustaceans Animal parasites of fish Crustaceans described in Tokyo20 The most effective treatment against argulusosis is organophosphates, which usually are given as 2 or 3 doses at 1-wk intervals to kill emerging larvae and juveniles.

A heavily infested small fish is sometimes led to the death.

Argulus japonicus in the Olifants River system: The filters include a mechanical-fiber pad, a fluidized bed biofilter, and a mechanical—chemical fiber sleeve with carbon.

Support Center Support Center. The parasite has a strong swimming ability because 4 well-developed swimming legs are located in the thorax.


Under low magnification, Argulus -associated lesions appear as craters, which form due to hyperplasia of adgulus epidermis at the margins of the wound. Because our facility did not have a severe outbreak, and only a few fish were affected, we opted for the conservative approach of manual removal of lice without further medical intervention. Lesions inflicted by the parasites often become necrotic and argulux, leading to secondary infections. Common carp Cyprinus carpiogoldfish Carassius auratus.

WoRMS – World Register of Marine Species – Argulus japonicus Thiele,

Goldfish heavily infected by A. Argulus japonicus reproduces sexuallywith females laying anywhere from strings of eggs after mating occurs on the host. Captured fish should be examined quickly because Argulus lice can leave the fish rapidly once it is disturbed or removed from the water.

This site uses cookies. The insecticide Dipterex is able to kill both adult and larval stages of Argulus japonicus ; however, eggs are unaffected by this treatment, meaning an initial application of the compound must be repeated after 2 weeks after which any eggs laid will have hatched in order to achieve an effective reduction of the parasite.

Flick G, Wiegertjes GF. Adults can survive without a host for approximately 2 wk. The digestive system of larval Argulus japonicus Branchiura. University of Puerio Rico Juvenile Argulus lice attach to the host by means of the claws, whereas adults attach by means of a pair of modified suckers commonly referred to as maxillules.

Heavy infestations of this parasite can cause significant morbidity japoncius mortality.

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