Experimental comparison of the bioaccumulation of anthropogenic radionuclides by egg and juvenile life stages of a small shark

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dc.contributor.authorJeffree, RAen_AU
dc.contributor.authorJohansen, MPen_AU
dc.date.accessioned2025-12-05T03:45:12Zen_AU
dc.date.available2025-12-05T03:45:12Zen_AU
dc.date.issued2017-11en_AU
dc.date.statistics2025-03-06en_AU
dc.description.abstractThis study compared the bioaccumulation of anthropogenic nuclides (65Zn, 134Cs, 60Co and 241Am) between the egg and juvenile life stages of a small shark (Scyliorhinus canicula), based on previously published experimental data. Rates of accumulation over 15 days were derived and summed for the transfer pathways which were specific to these two life stages. Radionuclide transfers to the egg and its embryo & yolk were quantified for i) the maternal pathway following her uptake of radionuclides via food and seawater and ii) from seawater following its oviposition. For the juvenile, the transfer of radionuclides were measured for aqueous & dietary pathways. The results show that, compared to juveniles, eggs have equivalent rates of accumulation of 65Zn and 134Cs but enhanced accumulation of 241Am by a factor of five and of 60Co by two orders of magnitude. The radiological exposure of the embryo due to radionuclides maternally transferred to the embryo & yolk is also enhanced for the alpha-emitting 241Am. This enhanced accumulation of 241Am and 60Co, as well as the equivalent accumulation of 65Zn and 134Cs, suggest greater likely vulnerability to radiation damage in eggs as compared to juveniles. Radiological dose assessment confirmed highest doses to the egg which is predominantly due to accumulated 241Am. © 2017 Elsevier Ltd.en_AU
dc.format.mediumPrint-Electronicen_AU
dc.identifier.citationJeffree, R. A., & Johansen, M. P. (2017). Experimental comparison of the bioaccumulation of anthropogenic radionuclides by egg and juvenile life stages of a small shark. Journal of Environmental Radioactivity, 178-179, 430-438. doi:10.1016/j.jenvrad.2017.02.005en_AU
dc.identifier.issn0265-931Xen_AU
dc.identifier.issn1879-1700en_AU
dc.identifier.journaltitleJournal of Environmental Radioactivityen_AU
dc.identifier.pagination430-438en_AU
dc.identifier.urihttps://doi.org/10.1016/j.jenvrad.2017.02.005en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16766en_AU
dc.identifier.volume178-179en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectRadionuclide migrationen_AU
dc.subjectFishesen_AU
dc.subjectEggsen_AU
dc.subjectOntogenesisen_AU
dc.subjectRadiosensitivityen_AU
dc.subjectBiological accumulationen_AU
dc.subjectSeawateren_AU
dc.subjectZinc 65en_AU
dc.subjectRadiation effectsen_AU
dc.subjectAmericium 241en_AU
dc.titleExperimental comparison of the bioaccumulation of anthropogenic radionuclides by egg and juvenile life stages of a small sharken_AU
dc.typeJournal Articleen_AU
dcterms.dateAccepted2017-02-06en_AU
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