1. Independent Marine Consultant; Wilmington NC 28403 USA
2. School of Environmental Sciences; Ulster University; Coleraine BT52 1SA UK
3. School of Agriculture, Earth and Environmental Sciences; University of KwaZulu-Natal, Private Bag X54001; Durban South Africa
4. Centro de Investigação Marinha e Ambiental; Universidade do Algarve, Campus de Gambelas; 8005-139 Faro Portugal