Lake Michigan Ecosystem Trends and Harvest Data
Explore the ecological trends and harvest data in Lake Michigan through images depicting mussel populations, water clarity, fish abundance, historic prey biomass, sport harvest numbers, predator-prey ratios, and salmon stocking figures. Gain insights into the dynamics of the lake's ecosystem and fisheries management over the years.
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Southern Lake Michigan Mussel Trends 60 16-30 m (Quaggas) 30-50 m (Quaggas) 50-90 m (Quaggas) >90 m (Quaggas) % Area by Depth Zone 50 Mean Shell Free Biomass (g AFDW/m2) +/- S.E. 40 30 20 10 0 1998 2003 2008 2013 (Data Sources: Nalepa et al. 2013; Baldridge unpub.)
Comparison of Alewife and Dreissenid (Quagga and Zebra) Mussel Abundance 1200 16 14 1000 Alewife Quagga and Zebra Mussel Biomass (g/m2) 12 Quagga and Zebra Mussel 800 Alewife Biomass (kt) 10 600 8 6 400 4 200 2 0 0 Year
Lake Michigan Sport Harvest 18000 16000 14000 Sport Harvest in pounds (x1,000) 12000 Yellow Perch 10000 Walleye Steelhead 8000 Brown Trout Lake Trout Coho Salmon 6000 Chinook Salmon 4000 2000 0 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Year
Michigan Chinook Stocking Chinook Salmon Stocking in Lake Michigan 3,500,000 3,000,000 2,500,000 Number Stocked 2,000,000 1,500,000 1,000,000 500,000 0
