Alewife (image) University of California - Santa Cruz Share Print E-Mail Caption Populations of alewife (Alosa pseudoharengus) differ in gape size and other feeding traits, causing differences in plankton communities in different lakes. Credit David Post Usage Restrictions For use only with news coverage of this research. 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.