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John Ewart

Marine Advisory Serv Spec III

Aquaculture and Fisheries Specialist
Delaware Sea Grant Marine Advisory Service
College of Earth, Ocean, and Environment
University of Delaware
Hugh R. Sharp Campus
700 Pilottown Road
Lewes, DE 19958-1298
Phone: 302-645-4060
Fax: 302-645-4213



M.S., Marine Studies, University of Delaware, Lewes, Delaware (1985)

B.S., Zoology, University of Rhode Island, Kingston, Rhode Island (1973)

Background and Experience

Mr. Ewart recently completed his 35th year of service to the University of Delaware and has been the aquaculture & fisheries extension specialist with the University of Delaware Sea Grant Program at the College of Earth Ocean and Environment (CEOE) in Lewes, Delaware since 1986. His background includes work as a commercial fisherman, oceanographic technician, field biologist, research associate and laboratory technical coordinator. His professional interests include shellfish and fin fish aquaculture; aquatic production systems/live transport; commercial and recreational fisheries; shellfish restoration and stock enhancement; water quality management; technology transfer and training; aquaculture policy; and Information Technologies (IT).

Mr. Ewart developed and maintains the Delaware Aquaculture Resource Center (DARC) Web site, the World Aquaculture Society Employment Service (WASES), and several other pages related to aquaculture and fisheries in Delaware and the northeast region. He is actively involved with the World Aquaculture Society (WAS), US Aquaculture Society (USAS), the National Shellfisheries Association (NSA), and the East Coast Shellfish Grower’s Association (ECSGA), and currently serves as Treasurer for the East Coast Shellfish Research Institute (ECSRI).

Aquaculture in Delaware

The most recent activity with aquaculture in Delaware is passage of House Bill 160 (HB160) by the 147th Delaware General Assembly in June 2013 that authorized the Delaware Department of Natural Resources and Environmental Control (DNREC) to establish a bottom leasing program for shellfish aquaculture in Delaware’s Inland Bays. For a summary of the research, demonstration and policy development work supporting HB160 see Shellfish Aquaculture in Delaware’s Inland Bays: Status, Opportunities, and Constraints. Also, the Delaware Inland Bays Shellfish Aquaculture Page is a current and continually updated educational resource about Inland Bays shellfish aquaculture with news on the DNREC regulatory development process; technical, economic, and environmental information; links to other state shellfish aquaculture programs; and links to information of interest for prospective shellfish growers, and local coastal community businesses and residents.


John W. Ewart Publications

John W. Ewart Publications List


CEOE School & Departments

School of Marine Science & Policy

Advancing the understanding, stewardship, and conservation of estuarine, coastal, and ocean environments.

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Department of Geological Sciences

Discovering how geological processes have operated over various time scales to create and influence the planet’s surface environments.

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Department of Geography

Investigating the interactions between people and the environment and the processes that explain the location of human and natural phenomena.

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College of Earth, Ocean, and Environment • 111 Robinson Hall • Newark, DE 19716 • USA • Phone: 302-831-2841
Geography: 302-831-2294 • Geology: 302-831-2569 • Marine Science and Policy: 302-645-4212 • E-mail: ceoe-info@udel.edu

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