Major Goals and Objectives

• Reconstruct the chronology of invasions of Orconectes rusticus and other nonnative crayfishes into the Great Lakes
• Use genetic analyses of the regions in Lake Michigan where O. rusticus is displacing O. propinquus
• Predict the future distribution of O. rusticus in the Great Lakes by comparing the environmental requirements of O. rusticus (especially substrata) with the characteristics of Great Lakes littoral zones

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