Predator-Prey Genetics (IMAGE) Michigan Technological University Caption Michigan Tech ecologist Rolf Peterson has studied the wolves, moose, rabbits, and trees of Isle Royale for decades as a part of the world's longest running predator-prey study, now in its 61st year. Credit Sarah Bird/Michigan Tech Usage Restrictions please credit License Licensed content 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.