Affiliation: | Centre for Ecology and Hydrology Dorset, Winfrith Technology Centre, Winfrith Newburgh, Dorchester, Dorset DT2 8ZD, UK;;Centre for Ecology and Hydrology, Monks Wood, Abbots Ripton, Huntingdon, Cambridgeshire PE28 2LS, UK;;British Trust for Ornithology, The Nunnery, Thetford, Norfolk IP24 2 PU, UK;;Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory, Pakefield Road, Lowestoft, Suffolk NR33 OHT, UK;;Eastern Sea Fisheries Joint Committee, Unit 6, North Lynn Business Village, Bergen Way, North Lynn, Kings Lynn, Norfolk PE30 2JG, UK |