Research Progress and Prospects of Parasitic Diseases in Salmon and Trout

Abstract:

Salmon and trout are typical cold-water fishes with high economic values; they are among the most important economic fishes in the world. However, with increasing aquaculture density, the aquaculture environment is becoming increasingly degraded. The occurrence of salmon and trout parasitic diseases and corresponding damage to fishes are also increasing. These factors severely restrict the healthy development of the industry. Common and severe parasites of salmon and trout are Gyrodactylus, Caligus rogercresseyi, Neoparamoeba perurans, Myxobolus cerebralis, Tetracapsuloides bryosalmonae, and Kudoa spp. These parasites have simple life cycles and rapid reproduction rates. Most of them inhabit the skin and various organs of the fish body, thereby slowing growth and weakening the resistance of the fish. This effect damages the fish body and eventually kills the fish. Physical control methods and chemicals are used in combination for comprehensive prevention and control. This paper reviews the research progress and achievements in the field of the common parasitic diseases of salmon and trout to provide useful references for the research and control of such diseases.