ARGULUS JAPONICUS PDF

Ecology: Reproduction in dioecious A. Although mating occurs on the body of the host fish, females lay 1—9 strings of 5— eggs in 1—6 rows on hard substrate, which they cover in gelatinous excretions. After hatching, the rest of the life cycle excluding egg-laying , takes place on the body of the host fish in 30— days. Argulus japonicus lays eggs continuously, although in winter eggs may stay dormant until warmer temperatures conducive to hatching occur in spring. As this species develops it passes through around 6 different larval instar stages before metamorphosing into an adult.

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Ecology: Reproduction in dioecious A. Although mating occurs on the body of the host fish, females lay 1—9 strings of 5— eggs in 1—6 rows on hard substrate, which they cover in gelatinous excretions. After hatching, the rest of the life cycle excluding egg-laying , takes place on the body of the host fish in 30— days. Argulus japonicus lays eggs continuously, although in winter eggs may stay dormant until warmer temperatures conducive to hatching occur in spring.

As this species develops it passes through around 6 different larval instar stages before metamorphosing into an adult. Argulus japonicus has been recorded in mesohaline conditions in Chesapeake Bay, although most records in other parts of the world are from freshwater environments. This parasite is typical of eutrophic habitats Ruiz et al. Means of Introduction: Argulus japonicus was very likely introduced to North America with its host C.

Status: Established where recorded. Impact of Introduction: A Realized: A. However, it is most typically found on C. It can influence the appetite of a fish, subsequently affecting growth rates. It attaches to the skin, fins, or gills by way of suckers, and then feeds.

It may also aid in the transmission of Rhabdovirus carpio, spring viraemia rhabdovirus, larval nematodes, and the fungal disease caused by Saprolegnia in some parts of the world Gresty et al. This species has the potential to cause increased stress in Rainbow trout Oncorhynchus mykiss , when it occurs in high densities. Experiments indicate that it does not prefer its common host C. In fact, it is probably capable of infecting almost all species of freshwater fish. It has been recorded on Labeo rohita, Catla catla, and Cirrhina mrigala in Pakistan; various cyprinids in Malaysia; tilapias, barbs, I.

In South Africa it has been known to reach near epidemic levels in all fish species present in some water bodies, and has the potential to cause drastic effects in local fish populations Pilgrim ; Kruger et al.

References : click for full references Amin, O. On the Crustacean ectoparasites of fishes from southeast Wisconsin. Transactions of the American Microscopical Society 2 Avenant-Oldewage, A. Argulus japonicus in the Olifants River system: possible conservation threat? South African Journal of Wildlife Research 31 The male reproductive system and mechanisms of sperm transfer in Argulus japonicus Crustacea: Branchiura.

Journal of Morphology 1 Bunkley-Williams, L. Williams, Jr. Galarowicz, T. Response by the parasitic crustacean Argulus japonicus to host chemical cues. Journal of Freshwater Ecology Gault, N. Kilpatrick, and M. Biological control of the fish louse in a rainbow trout fishery.

Journal of Fish Biology 60 1 Army Corps of Engineers. Gresty, K. Boxshall, and K. The fine structure and function of the cephalic appendages of the branchiuran parasite, Argulus japonicus Thiele. Haond, C. Nolan, N. Ruane, J. Rotllant, and S. Cortisol influences the host-parasite interaction between the rainbow trout Oncorhynchus mykiss and the crustacean ectoparasite Argulus japonicus.

Parasitology 6 Hill, T. McClain, eds. Hudson, P. Structure of the adult ovary and oogenesis in Argulus japonicus Thiele Crustacea: Branchiura. Jafri, S. A new record of ectoparasitic crustaceans Branchiura: Argulidae from major carps in Sindh, Pakistan.

Pakistan Journal of Zoology 23 1 Kruger, I. Van As, and J. Observations on the occurrence of the fish louse Argulus japonicus Thiele, in the western Transvaal. South African Journal of Zoology 18 4 Lamarre, E. Lack of host species selection by the exotic parasitic crustacean Argulus japonicus. Journal of Freshwater Ecology 7 1 McLaughlin, P. Common and scientific names of aquatic invertebrates from the United States and Canada: Crustaceans. Mills, E. Leach, J. Carlton, and C. Exotic species in the Great Lakes: a history of biotic crises and anthropogenic introductions.

Journal of Great Lakes Research 19 1 Pilgrim, R. Poly, W. Crustaceana Leiden 71 1 Ruiz, G. Fofonoff, J. Carlton, M. Wonham, and A. Invasion of coastal marine communities in North America: apparent patterns, processes, and biases. Annual Review in Ecology and Systematics Rushton-Mellor, S. Aquaculture and Fisheries Management Schram, T. Iversen, P. Heuch, and E. Argulus sp. Crustacea: Branchiura on cod, Gadus morhua from Finnmark, northern Norway. Journal of the Marine Biological Association of the U.

Seng, L. Two ectoparasitic crustaceans belonging to the family Argulidae Crustacea: Branchiura in Malaysian freshwater fishes. Malayan Nature Journal 39 3 Singhal, R. Jeet, and R. Chemotherapy of six ectoparasitic diseases of cultured fish. Aquaculture 54 3 Shafir, A. Van As. Laying, development of hatching of eggs of the fish ectoparasite Argulus japonicus Crustacea: Branchiura. Journal of Zoology London Swanepoel, J. Comments on the morphology of the pre-oral spine in Argulus Crustacea: Branchiura.

Journal of Morphology 2 Tam, Q.

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Chesapeake Bay Introduced Species Database

Email: ude. Argulus spp can be a major threat to fish health, because heavy infestations can cause significant morbidity and mortality. In addition, fish lice are known to be the vehicle for other fish diseases. During rounds at our facility, Argulus japonicus was collected from the caudal and anal fins of 3 goldfish Carassius auratus.

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Argulus japonicus

References- Martin Economic Impacts Outside Chesapeake Bay Impact: Argulus japonicus is a potentially serious pest in aquaculture, including rearing of cyprinid fishes for food, baitfish rearing, ornamental culture of Carassius auratus and Cyprinus carpio Hoffman ; Jafri and Ahmed ; Rushton-Mellor The sites of attachment of the parasite can be unsightly and are also prone to secondary infection. High densities of Argulus spp. Argulus japonicus is apparently present in natural waters in much of North America Cressey ; LaMarre and Cochran , but its effects on wild fish populations are unknown. In some parts of the world, including South Africa, it has become an abundant parasite of native cyprinid fishes Shafir and Oldewage , but its impacts on fisheries have apparently not been quantified. References- Cressey ; Hoffman ; Jafri and Ahmed ; LaMarre and Cochran ; Rushton-Mellor ; Shafir and Oldewage Ecological Impacts Impacts on Natives: Parasitism Parasitism- Argulus japonicus punctures the skin of fishes, and secretes protoelytic enzymes to stimulate blood flow in the surrounding tissues.

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