| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
8571
|
Renibacterium (Corynebacterium) salmoninarum
|
Recreation
|
Observational
|
Field
|
Prevalence rates of Renibacterium salmoninarum were up to 100% in some parts of the Lake Michigan drainage around 1986. This outbreak of Bacterial kidney disease (BKD) caused heavy mortality in Chinook salmon in 1988 and persisted in the population until 1992. That year, boat fisheries observed at least a 40% decline in Chinook salmon catch per unit effort levels. By 1993, catch per unit effort was 15% of the peak observed in 1986.
|
Lake Michigan, USA
|
16560
|
|
8572
|
Renibacterium (Corynebacterium) salmoninarum
|
Recreation
|
Observational
|
Field
|
In 1986, the Strawberry Creek spawning weirs in Wisconsin documented no presence of Renibacterium salmoninarum. In 1988, the bacterium was isolated in 67% of the returning Chinook salmon and then persisted at moderate levels through 1992.
|
Lake Michigan, USA
|
16560
|
|
8573
|
Renibacterium (Corynebacterium) salmoninarum
|
Recreation
|
Observational
|
Field
|
The mortality events of the 1980s are believed to have also been influenced by increased vulnerability due to food shortages, particularly Alosa pseudoharengus (alewives), high Chinook salmon density, and high parasite loads of Renibacterium salmoninarum.
|
Lake Michigan, USA
|
16560
|