· Lake Huron much less productive than Lake Michigan and not as heavily stocked.
· In late 1990s indications of declining alewife abundance and reduced chinook salmon growth.
· Growth rates lower than in Lake Michigan prior to collapse
· Feared BKD outbreak in Lake Huron was imminent.
0
2
4
6
8
10
12
14
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
Kilograms
Age 1
Age 2
Age 3
Age 4
Lake Michigan
Lake Huron
BKD period
1998
• This graph shows the growth rates of chinook salmon in Michigan at the time of the collapse and outbreak of bacterial kidney disease compared to growth rates in Lake Huron in the late 1990s.