Monster Seminar JAM - Sea lamprey in Lake Superior: Responses to increased host abundance and climate change.
Dr. Jim Kitchell, Center for Limnology, University of Wisconsin
Goals for management of Lake Superior include: 1) Control of the invasive sea lamprey and 2) Restoration of the native fish community. Substantial progress has been made in both efforts. During the period of 1960-80, adult sea lamprey populations have been reduced to 5-10% of former abundances and native fish populations increased several-fold. Native lake trout are a preferred host of lamprey and as trout populations increased, sizes of adult sea lamprey increased. Since 1980, sizes of adult sea lamprey have continued to increase. This corresponds with a general and continuing rise in average lake temperatures which owes to climate change effects. Lake Superior is now the most rapidly warming lake on the planet. Larger lampreys kill more host fishes and have higher fecundity. This talk focuses on an adaptive management approach to the challenges for lamprey control based on regional differences in lake warming effects proximate to rivers and streams where larger lampreys spawn.
Date and Time:
January 27, 2011,
11:00 am - 12:00 pm