Heterosporosis

Description

• First wild fish discovery in 2000
• A protozoan (Microsporidean) that infects and degrades muscle of yellow perch and other species
• Symptoms: white and opaque flesh
• Distribution: Wisconsin, Minnesota & Ontario
• Infected filet should be disposed of in the garbage, burned or buried.
• Prevent by drying all equipment and cleaning live wells and bilges away from lake
• Full lifecycle unknown

IHN Virus

Description

• Infectious Hematopoietic Necrosis (IHN) Virus
• Synonyms: Sockeye salmon virus, Oregon sockeye virus, Sacramento River chinook disease, Sacramento River chinook virus
• Symptoms: lethargy, swim high in the water column, anorexia, popeye, pale gills, darkening of body, abdominal distention

Whirling Disease

Description

Whirling disease in young fish.

• First discovered in Montana in 1994
• Native to Europe
• Caused by the myxozoan parasite Myxobolus cerebralis
• Parasite digests the cartilage of young trout, especially in rainbow trout
• Deformities reduce ability to survive by impairing swimming and feeding ability
• The parasite has a complex life cycle involving a salmonid host and the worm Tubifex tubifex

Links

The Whirling Disease Foundation

Asian Tapeworm

Description

• Bothriocephalus acheilognathi
• A cestode that infects anterior intestine of fish.
• Spread by ingestion of infected copepods
• Fish host species: Primarily
• Cyprinidae except for gold fish.
• Optimal temperature: 25°C
• Detected in southern half of US, NH, NY, Hawaii
• Identification: Bothria, pyramid- shaped scolex and segmented body