Salmo salar: A commercially important species of SALMON in the family SALMONIDAE, order SALMONIFORMES, which occurs in the North Atlantic.Fish Diseases: Diseases of freshwater, marine, hatchery or aquarium fish. This term includes diseases of both teleosts (true fish) and elasmobranchs (sharks, rays and skates).Salmon: Fish of the genera ONCORHYNCHUS and Salmo in the family SALMONIDAE. They are anadromous game fish, frequenting the coastal waters of both the North Atlantic and Pacific. They are known for their gameness as a sport fish and for the quality of their flesh as a table fish. (Webster, 3d ed).Aquaculture: Cultivation of natural faunal resources of water. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Trout: Various fish of the family SALMONIDAE, usually smaller than salmon. They are mostly restricted to cool clear freshwater. Some are anadromous. They are highly regarded for their handsome colors, rich well-flavored flesh, and gameness as an angling fish. The genera Salvelinus, Salmo, and ONCORHYNCHUS have been introduced virtually throughout the world.Gills: Paired respiratory organs of fishes and some amphibians that are analogous to lungs. They are richly supplied with blood vessels by which oxygen and carbon dioxide are exchanged directly with the environment.Salmonidae: A family of anadromous fish comprising SALMON; TROUT; whitefish; and graylings. They are the most important food and game fishes. Their habitat is the northern Atlantic and Pacific, both marine and inland, and the Great Lakes. (Nelson: Fishes of the World, 1976, p97)Ectoparasitic Infestations: Infestations by PARASITES which live on, or burrow into, the surface of their host's EPIDERMIS. Most ectoparasites are ARTHROPODS.Protozoan Infections, Animal: Infections with unicellular organisms formerly members of the subkingdom Protozoa. The infections may be experimental or veterinary.Fisheries: Places for cultivation and harvesting of fish, particularly in sea waters. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Copepoda: A huge subclass of mostly marine CRUSTACEA, containing over 14,000 species. The 10 orders comprise both planktonic and benthic organisms, and include both free-living and parasitic forms. Planktonic copepods form the principle link between PHYTOPLANKTON and the higher trophic levels of the marine food chains.Isavirus: A genus in the family ORTHOMYXOVIRIDAE containing one species: Infectious salmon anemia virus.Furunculosis: A persistent skin infection marked by the presence of furuncles, often chronic and recurrent. In humans, the causative agent is various species of STAPHYLOCOCCUS. In salmonid fish (SALMONIDS), the pathogen is AEROMONAS SALMONICIDA.Lobosea: A class of amoeboid EUKARYOTES that forms either filiform subpseudopodia or lobopodia. Characteristics include the absence of sorocarps, sporangia, or similar fruiting bodies. Lobosea were formerly members of the phylum Sarcomastigophora, subphylum Sarcodina, under the old five kingdom paradigm.Infectious pancreatic necrosis virus: The type species of AQUABIRNAVIRUS, causing infectious pancreatic necrosis in salmonid fish and other freshwater and marine animals including mollusks.Fish Proteins: Proteins obtained from species of fish (FISHES).New Brunswick: A province of eastern Canada, one of the Maritime Provinces with NOVA SCOTIA; PRINCE EDWARD ISLAND; and sometimes NEWFOUNDLAND AND LABRADOR. Its capital is Fredericton. It was named in honor of King George III, of the House of Hanover, also called Brunswick. (From Webster's New Geographical Dictionary, 1988, p828 & Room, Brewer's Dictionary of Names, 1992, p375)Platyhelminths: A phylum of acoelomate, bilaterally symmetrical flatworms, without a definite anus. It includes three classes: Cestoda, Turbellaria, and Trematoda.Totiviridae: A family of RNA viruses that infect fungi and protozoa. There are three genera: TOTIVIRUS; GIARDIAVIRUS; and LEISHMANIAVIRUS.Diplomonadida: A group of flagellated, mostly symbiotic EUKARYOTES characterized by twofold symmetry associated with the presence of a pair of karyomastigont organellar systems. Two nuclei are attached by fibers to the flagella and there are no MITOCHONDRIA. Diplomonadida were formerly members of the class Zoomastigophora in the old five kingdom paradigm.Birnaviridae Infections: Virus diseases caused by the BIRNAVIRIDAE.Oncorhynchus mykiss: A large stout-bodied, sometimes anadromous, TROUT found in still and flowing waters of the Pacific coast from southern California to Alaska. It has a greenish back, a whitish belly, and pink, red, or lavender stripes on the sides, with usually a sprinkling of black dots. It is highly regarded as a sport and food fish. Its former name was Salmo gairdneri. The sea-run rainbow trouts are often called steelheads. Redband trouts refer to interior populations of rainbows.Piscirickettsiaceae Infections: Infections with bacteria of the family PISCIRICKETTSIACEAE, causing septicemic disease of salmonid fish (SALMONIDAE). Piscirickettsia-like bacteria are also associated with disease syndromes in non-salmonid fish.Head Kidney: A primitive form of vertebrate kidney that is found in adults of some primitive FISHES and in the embryos of more advanced fishes. In some species of fishes it contains phagocytic cells and is also a major site of HEMATOPOIESIS, analogous to the mammalian BONE MARROW.Tasmania: An island south of Australia and the smallest state of the Commonwealth. Its capital is Hobart. It was discovered and named Van Diemen's Island in 1642 by Abel Tasman, a Dutch navigator, in honor of the Dutch governor-general of the Dutch East Indian colonies. It was renamed for the discoverer in 1853. In 1803 it was taken over by Great Britain and was used as a penal colony. It was granted government in 1856 and federated as a state in 1901. (From Webster's New Geographical Dictionary, 1988, p1190 & Room, Brewer's Dictionary of Names, p535)Seawater: The salinated water of OCEANS AND SEAS that provides habitat for marine organisms.Amebiasis: Infection with any of various amebae. It is an asymptomatic carrier state in most individuals, but diseases ranging from chronic, mild diarrhea to fulminant dysentery may occur.NorwayAlphavirus: A genus of TOGAVIRIDAE, also known as Group A arboviruses, serologically related to each other but not to other Togaviridae. The viruses are transmitted by mosquitoes. The type species is the SINDBIS VIRUS.Atlantic OceanRNA Virus InfectionsTogaviridae: A family of RNA viruses, mainly arboviruses, consisting of two genera: ALPHAVIRUS (group A arboviruses), and RUBIVIRUS. Virions are spherical, 60-70 nm in diameter, with a lipoprotein envelope tightly applied to the icosahedral nucleocapsid.Aeromonas salmonicida: A species of gram-negative bacteria, in the family Aeromonadaceae. It is strictly parasitic and often pathogenic causing FURUNCULOSIS in SALMONIDS and ulcer disease in GOLDFISH.Fresh Water: Water containing no significant amounts of salts, such as water from RIVERS and LAKES.Kinetoplastida: An order of flagellate protozoa. Characteristics include the presence of one or two flagella arising from a depression in the cell body and a single mitochondrion that extends the length of the body.Anisakis: A genus of nematodes of the superfamily ASCARIDOIDEA. Its organisms are found in the stomachs of marine animals and birds. Human infection occurs by ingestion of raw fish that contain larvae.Oncorhynchus kisutch: An anadromous species of SALMON ranging from the Arctic and Pacific Oceans to Monterey Bay, California and inhabiting ocean and coastal streams. It is familiarly known as the coho or silver salmon. It is relatively small but its light-colored flesh is of good flavor.Flavobacteriaceae Infections: Infections with bacteria of the family FLAVOBACTERIACEAE.Piscirickettsiaceae: A family of gram-negative bacteria, in the order Thiotrichales.Protozoan Infections: Infections with unicellular organisms formerly members of the subkingdom Protozoa.Vibrio Infections: Infections with bacteria of the genus VIBRIO.Euglenozoa Infections: Infections with the protozoa of the phylum EUGLENOZOA.Cytophagaceae Infections: Infections with bacteria of the family CYTOPHAGACEAE.Reoviridae Infections: Infections produced by reoviruses, general or unspecified.Gram-Positive Asporogenous Rods: A gram-positive, non-spore-forming group of bacteria comprising organisms that have morphological and physiological characteristics in common.Pancreatic Diseases: Pathological processes of the PANCREAS.Aliivibrio salmonicida: A species of gram-negative bacteria in the genus ALIIVIBRIO. Aliivibrio salmonicida is the causative agent of cold water vibriosis, a HEMORRHAGIC SEPTICEMIA of ATLANTIC SALMON.ChileTrematode Infections: Infections caused by infestation with worms of the class Trematoda.Parasitic Diseases, Animal: Infections or infestations with parasitic organisms. The infestation may be experimental or veterinary.Flexibacter: A genus of gram-negative, chemoorganotrophic bacteria in the family CYTOPHAGACEAE. In some species there is a cyclic change in cell morphology.Crustacea: A large subphylum of mostly marine ARTHROPODS containing over 42,000 species. They include familiar arthropods such as lobsters (NEPHROPIDAE), crabs (BRACHYURA), shrimp (PENAEIDAE), and barnacles (THORACICA).Rivers: Large natural streams of FRESH WATER formed by converging tributaries and which empty into a body of water (lake or ocean).Orthomyxoviridae Infections: Virus diseases caused by the ORTHOMYXOVIRIDAE.