Bioaccumulation kinetics and internal distribution of the fission products radiocaesium and radiostrontium in an estuarine crab

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dc.contributor.authorCresswell, Ten_AU
dc.contributor.authorPrentice, Een_AU
dc.contributor.authorHowell, NRen_AU
dc.contributor.authorCallaghan, PDen_AU
dc.contributor.authorMetian, Men_AU
dc.contributor.authorJohansen, MPen_AU
dc.date.accessioned2021-12-08T22:02:40Zen_AU
dc.date.available2021-12-08T22:02:40Zen_AU
dc.date.issued2021-04-15en_AU
dc.date.statistics2021-11-18en_AU
dc.description.abstractCrab has been designated by the ICRP as one of twelve reference/model organisms for understanding the impacts of radionuclide releases on the biosphere. However, radionuclide-crab interaction data are sparse compared with other reference organisms (e.g. deer, earthworm). This study used an estuarine crab (Paragrapsus laevis) to investigate the contribution of water, diet and sediment sources to radionuclide (134Cs and 85Sr) bioaccumulation kinetics using live-animal radiotracing. The distribution of each radionuclide within the crab tissues was determined using dissection, whole-body autoradiography and synchrotron X-ray Fluorescence Microscopy (XFM). When moulting occurred during exposure, it caused significant increases in 85Sr bioaccumulation and efflux of 134Cs under constant aqueous exposure. Dietary assimilation efficiencies were determined as 55 ± 1% for 134Cs and 49 ± 3% for 85Sr. 85Sr concentrated in gonads more than other organs, resulting in proportionally greater radiation dose to the reproductive organs and requires further investigation. 134Cs was found in most soft tissues and was closely associated with S and K. Biodynamic modelling suggested that diet accounted for 90–97% of whole-body 137Cs, while water accounted for 59–81% of 90Sr. Our new data on crab, as a representative invertebrate, improves understanding of the impacts of planned or accidental releases of fission radionuclides on marine ecology. Crown Copyright © 2020 Published by Elsevier B.V.en_AU
dc.identifier.articlenumber124453en_AU
dc.identifier.citationCresswell, T., Prentice, E., Howell, N., Callaghan, P., Metian, M., & Johansen, M. P. (2021). Bioaccumulation kinetics and internal distribution of the fission products radiocaesium and radiostrontium in an estuarine crab. Journal of Hazardous Materials, 408, 124453. doi:10.1016/j.jhazmat.2020.124453en_AU
dc.identifier.issn0304-3894en_AU
dc.identifier.journaltitleJournal of Hazardous Materialsen_AU
dc.identifier.urihttps://doi.org/10.1016/j.jhazmat.2020.124453en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12399en_AU
dc.identifier.volume408en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectRadioisotopesen_AU
dc.subjectCesiumen_AU
dc.subjectStrontiumen_AU
dc.subjectCrabsen_AU
dc.subjectInvertebratesen_AU
dc.subjectOrgansen_AU
dc.subjectMoltingen_AU
dc.subjectBiological accumulationen_AU
dc.subjectEstuariesen_AU
dc.titleBioaccumulation kinetics and internal distribution of the fission products radiocaesium and radiostrontium in an estuarine craben_AU
dc.typeJournal Articleen_AU
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