title: Uptake and depuration of 131I by the edible periwinkle Littorina littorea: uptake from labelled seaweed (Chondrus crispus).
abstract: Uptake and depuration experiments of (131)I from labelled seaweed (Chondrus crispus) by the edible periwinkle Littorina littorea have been performed. Radioiodine concentrations in winkles during uptake followed first-order kinetics with an uptake half-time of 1 day, and a calculated equilibrium concentration (C(infinity)) of 21 000 Bq kg(-1) resulting in a transfer factor of 0.07 with respect to the labelled seaweed used as food. For depuration, a biphasic sequence with biological half-lives of 1 and 24 days was determined. The results suggest that in general, iodine turnover in periwinkles is slower than observed for other molluscs (monophasic biological half-lives in the order of 2-3 days). Both environmental media, food and seawater, can be significant sources of radioiodine for the winkle.
authors.affiliation: Westlakes Research Institute, The Princess Royal Building, Westlakes Science and Technology Park, Moor Row, Cumbria CA24 3LN, UK.
authors.forename: R C
authors.initials: RC
authors.lastname: Wilson
authors.forename: J
authors.initials: J
authors.lastname: Vives i Batlle
authors.forename: P
authors.initials: P
authors.lastname: McDonald
authors.forename: T G
authors.initials: TG
authors.lastname: Parker
mesh_terms: D000818:Animals; D004032:Diet; D020387:Food Chain; D006207:Half-Life; D007457:Iodine Radioisotopes / Q000493:pharmacokinetics; D012624:Seaweed / Q000737:chemistry*; D012908:Snails / Q000502:physiology*; D014018:Tissue Distribution; D014875:Water Pollutants, Radioactive / Q000493:pharmacokinetics*
chemical_list: D007457:Iodine Radioisotopes; D014875:Water Pollutants, Radioactive