Specialist: Dr. Bill Hall Limulus Biology and Population Dynamics 2003 Horseshoe Crab Survey Limulus is a keystone species in the Delaware Estuary. Currently the Bay and shelf populations are experiencing heavy fishery pressure due to the bait industry and a number of data sets indicate a strong population decline. The advisory service continues to support population studies as well as faculty research. K-12 Education Programs Teacher Education | Middle School Curricula | Teacher Resources Education at the K-12 level is undergoing major change at all levels. The advisory service is assisting the implementation of change through a number of workshops, some of which are not limited to Delaware teachers. The workshops are supported by the University, the Department of Education and the Delaware teachers Center. Index of Related Educational Sites