Marten Map (image) University of Wisconsin-Madison Share Print E-Mail Caption The populations of martens surveyed for this study surrounded the Lake Superior basin. Colorado martens from a different species served as a comparison. Credit Jonathan Pauli, Phil Manlick Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.