Logperch drainage map (IMAGE) Penn State Caption To reach their conclusion that the Chesapeake logperch is one of a kind, the researchers collected thousands of specimens of logperch using seines, electrofishing units and electrified benthic trawls from the Allegheny River, from tributaries of Lake Erie and from the lower Susquehanna River Credit Penn State Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.