This week I traveled to Ann Arbor to visit one of the labs doing research on the Great Lakes. I met up with Dr. Madenjian first and we talked about alewives and the salmon fishery.
Great Lakes Science Center, Ann Arbor, Michigan
Dr. David "Bo" Bunnell with some of the fish collected from Lake Michigan
Then, Dr. Bunnell (in photo above) gave me a tour of the facility and we had a long talk about his work to understand the food web in the lakes.
The Great Lakes Science Center has been doing an annual bottom trawl survey on Lake Michigan since 1973. They have seen tremendous change in the lake over the decades.
The most dramatic change is the colonization of the lake by invasive mussels. While zebra mussels are known to beach walkers, the quagga mussel has taken over the deeper parts of the lake and has blanketed the floor of Lake Michigan.
The video below is from a recent survey of