Spring 1999
VOLUME 21, NUMBER 1

• Fish Respond to Natural Water Flow in Manistee River
• Promoting Sustainability
• A Year in Washington
• Zebra Mussels Invade 36 New Inland Lakes

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Summer 1999
VOLUME 21, NUMBER 2

• Yellow Perch: Will ‘99 be a Good Year?
• Mapping Purple Loosestrife
• Low Water Levels Raise Questions

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Fall 1999
VOLUME 21, NUMBER 3

• Improving Grand Marais Harbor
• Scientists Discover Tumors in Freshwater Zooplankton
• Baitfish and Aquatic Nuisance Species: What's the Connection?
• Teachers Learn About Exotic Species at Day Camp

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Winter 1999
VOLUME 21, NUMBER 4

• Tuning in to Low Power Radio
• Great Lakes & Natural Resources Camp
• Scientists Investigate Source of Great Lakes Contaminants
• Exotic Water Flea Enters Lake Michigan

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