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Fulltext – A Note on Lernaea Cyprinacea (Crustacea, Copepoda, Lernaeidae) Parasitizing the Cultured Sailfin Molly Poecilia latipinna and Their Control with. Approximately species of lernaeids (Lernaea and Lernaea-like parasites) have been described. Lernaea cyprinacea, one of the more common species. Life history study on Lernaea cyprinacea showed that the first copepodid stage appeared 3–4 days after hatching and there are six copepodid stages similar to.

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Freshwater aquaculture in India has remained synonymous with culture of Indian major carps and a few species of exotic varieties. The copepodid stages typically are also found on the gills but are not permanently embedded in the tissue.

We have observed that P. After confirming the absence of any visible signs of Lernaea infection among the existing fish species, P. Removing fish from the system for 7 days will break the life cycle in the tank because larval stages cannot survive without a host for this time period. British Fresh-Water Copepoda Vol. Infestations with Lernaea are most prevalent in the summer months and occur more commonly in stagnant or slow-moving water bodies.

Lernaea – Wikipedia

To cite this page: Its abdomen is short and rounded at the end and has three segments. Use of a microscope to examine wet mounts of affected areas skin, gill, oral cavity, fins will be necessary to confirm the presence of this parasite.

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With each stage, the copepod gains, loses, or modifies the structures on its body. All of the copepods were found in fresh-water and flood lakes only, never in saltier neighboring lakes. However, the resistance shown by C. This direct life cycle can take from 18 to 25 days to complete, and only a fish or an amphibian is necessary for the organism to develop from egg to mature adult. It was first found to be causing damage to eels, in this case choking the mouth cavity, but it is also found on other fish, burrowing with the head under the scales.


Transportation in tanks of two year old salmon Salmo salar L. Salt has been researched as a treatment for Lernaea with variable results.

Death, disease and deformity: N Am J Fish Manage. Introductions as factors in diseases of fish and aquatic invertebrates. Individual parasites can cause severe focal damage to affected tissue, increasing the risk of infection by bacterial and fungal pathogens present in the environment. Several of the larval stages die due to not reaching a suitable host. Similarly, the pathological lesions caused by the parasite were mild to moderate in intensity in L.

Lernaea cyprinacea

The anterior ventral pair is simple, while the dorsal pair is T-shaped. Behind it is a well-developed holdfast, normally consisting of two bifurcate dorsal processes and two simple ventral processes Fig. While ADW staff and contributors cypinacea references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control. It should be noted that the only available treatment regimen for Lernaea in food fish species is salt.

Mainly these hosts are from the family Cyprinidae. We assume that L. The present study on salinity treatment of Lernaeaidosis proves that P. Ecosystem Roles Many kinds of fish are the intermediate and definitive hosts.


It was found that the most susceptible species are grass carp and common carp. ADW doesn’t cover all species in the world, nor does it include all the latest scientific information about organisms we describe.

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On the other hand, it has been reported that Lernaea is a highly sensitive parasite to salinity change VelasquezOpen in a separate window. The lednaea and mouthparts of the free-swimming female are the same as in the mature form, except the antennule has a 5th segment separated. In the infected fish, circular ulcers surrounded by fibrinous granulomatous tissue, which later developed into a nodule were observed around the site cypinacea parasite attachment Fig.

The tanks with brood fishes were regularly monitored and the newly released juveniles were safely transferred to larval rearing tanks. The differences between the sexes are apparent when the female is cypriinacea fixed immovably to her host, while the much smaller male lives on the female’s body.

Can J Fish Aquat Sci.

Fish such as Carissus auratusAnguilla japonicaCarassius carassiusGobio cynocephalus and Cypinus carpio all are parasitized lernsea Lernaea cyprinacea. This concentration kills fish, but not the adult parasite, so that effective attack can only be made on larvae during spring. Fish and Parasitic Infestation In Januarybreeders were obtained from a commercial ornamental fish hatchery at Chennai, India. Original publication date December