Zoe Hutchison, University of Rhode Island Narragansett Bay, Graduate School of Oceanography, Narragansett, United States, Andrew B Gill, Center for Environment, Fisheries and Aquaculture Science, Lowestoft, United Kingdom; PANGALIA Environmental, Bedfordshire, United Kingdom, Peter Sigray, FOI Swedish Defence Research Agency, Stockholm, Sweden and John W King, Univ Rhode Island, Narragansett, RI, United States