title: Biokinetics of radiocesium in shrimp (Palaemon adspersus): seawater and food exposures.
abstract: The bioaccumulation of (134)Cs was studied in the shrimp Palaemon adspersus (Rathke, 1837) using dissolved or food pathways. The uptake and loss kinetics (following seawater and food uptake) were followed for 27 and 38 days, respectively. The steady state concentration factor (CFss) value of (134)Cs in the whole body of the shrimp was found to be 15 ± 0.08. The loss kinetics of radiocesium was described by a two-component exponential model, with a biological half-life of 85.5 days for the whole body. The depuration kinetics of (134)Cs was best fitted to a single-component exponential model for both edible and inedible parts. The depuration kinetics of (134)Cs following exposure via pulse-chase feeding was also described by a two-component exponential model, with a biological half-life of 84.2 days. Assimilation efficiency (AE) was found to be 38.5%. Most of the radioactivity was accumulated in muscular tissues (the edible part) of the shrimp compared to the remaining soft parts. The average of the total body burden of (134)Cs eliminated with molting was %15.3 ± 8.1.
authors: Istanbul University, Faculty of Science, Department of Biology, 34134 Vezneciler, Istanbul, Turkey.
authors: Narin
authors: N
authors: Sezer
authors: Istanbul University, Faculty of Science, Department of Biology, 34134 Vezneciler, Istanbul, Turkey. Electronic address: belmurat@istanbul.edu.tr.
authors: Murat
authors: M
authors: Belivermiş
authors: Istanbul University, Faculty of Science, Department of Biology, 34134 Vezneciler, Istanbul, Turkey.
authors: Önder
authors: Ö
authors: Kılıç
authors: Istanbul University, Faculty of Science, Department of Biology, 34134 Vezneciler, Istanbul, Turkey.
authors: Sayhan
authors: S
authors: Topcuoğlu
authors: Istanbul University, Faculty of Science, Department of Biology, 34134 Vezneciler, Istanbul, Turkey.
authors: Yavuz
authors: Y
authors: Çotuk
mesh_terms: D000465:Algorithms; D000818:Animals; D001822:Body Burden; D002588:Cesium Radioisotopes / Q000032:analysis*; D005502:Food; D005507:Food Contamination, Radioactive; D007700:Kinetics; D033561:Penaeidae; D011834:Radiation Monitoring / Q000379:methods; D011868:Radioisotopes / Q000032:analysis*; D012623:Seawater; D013997:Time Factors; D014875:Water Pollutants, Radioactive
chemical_list: D002588:Cesium Radioisotopes; D011868:Radioisotopes; D014875:Water Pollutants, Radioactive
keywords: Bioaccumulation; Concentration factor; Loss; Molting; Uptake