Parasites and Pathogens of Fish from Devils Lake, Sheyenne River, Red River and the Red River Delta. Report for the Fall 2006 Program
Loading...
Date
2007
Authors
International Red River Board
Journal Title
Journal ISSN
Volume Title
Publisher
International Red River Board
Abstract
SUMMARY OF 2006 RESULTS
• Fish from all sites in Canada and USA did not show clinical signs of disease from
bacteria
• No evidence of viral infection in USA; 2 of 60 walleye from Canada with a
common skin cancer and 1/60 with an iridovirsus.
• Nine parasites detected in Devils Lake; 28 in Red River Delta.
• Two parasite taxa found in Devils Lake, Gyrodactylus hoffmani and Epistylis sp.
have not yet been detected downstream in Canada or USA.
• A foreign and invasive parasite, the Asian tapeworm, has recently colonized the
Red River Delta from an unknown source.
• Histopathology of fish from the Red River Delta show evidence of a wide variety
of parasite induced lesions on a variety of tissues, as would be expected.
However, a relatively high incidence of lesions in the heart of walleye is of
concern.
• Whirling disease was not detected in Lake Whitefish collected from Lake
Winnipeg.
Description
Keywords
Fish Parasites, Fish Pathogens, Devils Lake, Sheyenne River, Red River, Red River Delta, Canada, U.S.A.