Where do the metals go? Investigating uptake, retention and spatial distribution of cadmium and zinc using radiotracers within a freshwater decapod crustacean

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dc.contributor.authorCresswell, Ten_AU
dc.contributor.authorSimpson, SLen_AU
dc.contributor.authorMazumder, Den_AU
dc.contributor.authorCallaghan, PDen_AU
dc.contributor.authorNguyen, APen_AU
dc.date.accessioned2015-11-11T01:38:12Zen_AU
dc.date.available2015-11-11T01:38:12Zen_AU
dc.date.issued2013-10-01en_AU
dc.date.statistics2015-11-06en_AU
dc.description.abstractThe bioaccumulation of metals by aquatic organisms can be studied in great depth using radiotracers, allowing insights into rates of uptake and fate of the metals once bioaccumulated. This study used the radioisotopes 109Cd and 65Zn to explore the uptake, retention and internal distribution of these non-essential and essential metals in solution by the freshwater decapod crustacean Macrobrachium australiense. Three treatments consisting of cadmium alone, zinc alone and a combination of cadmium and zinc were used to determine the differences in uptake rate of each metal individually and in a mixture over a three week period. The prawns were then allowed to depurate in metal-free water for two weeks to determine rates of efflux. The effects of moulting on the uptake and loss of each metal radionuclide were also identified during the study. Following exposure, prawns were cryosectioned and the spatial distribution of radionuclides visualised using autoradiography for the 3 experimental cohorts. Results showed that a mixture of the two metals did not affect the uptake or efflux rate of each individual metal. Moulting appeared to result in a short-term loss in zinc but an increased cadmium uptake rate. However, metal isotope concentration remained stable within the body during the depuration period. Autoradiography demonstrated that the majority of cadmium uptake was localised within the hepatopancreas, while zinc uptake was distributed between the hepatopancreas and the exoskeleton. The implications of the study are such that M. australiense readily accumulates both cadmium and zinc from solution but does not effectively eliminate either metal while in metal-free water. © 2013, ANSTO and CSIRO.en_AU
dc.identifier.citationCresswell, T., Simpson, S.L., Mazumder, D., Callaghan, P., Nguyen, A. 2013. Where do the metals go? Investigating uptake, retention and spatial distribution of cadmium and zinc usingradiotracers within a freshwater decapod crustacean. Platform presentation at SETAC-AU Melbourne Conference. 1-3 October 2013, Melbourne, Australia.en_AU
dc.identifier.conferenceenddate3 October 2013en_AU
dc.identifier.conferencenameSETAC-AU Melbourne Conferenceen_AU
dc.identifier.conferenceplaceMelbourne, Australiaen_AU
dc.identifier.conferencestartdate1 October 2013en_AU
dc.identifier.govdoc6270en_AU
dc.identifier.otherEP135543en_AU
dc.identifier.urihttp://www.setacmelbourne2013.com.au/en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6416en_AU
dc.language.isoenen_AU
dc.publisherSETAC Australasiaen_AU
dc.subjectMetalsen_AU
dc.subjectAquatic organismsen_AU
dc.subjectRadioisotopesen_AU
dc.subjectCrustaceansen_AU
dc.subjectZincen_AU
dc.subjectCadmiumen_AU
dc.titleWhere do the metals go? Investigating uptake, retention and spatial distribution of cadmium and zinc using radiotracers within a freshwater decapod crustaceanen_AU
dc.typeConference Abstracten_AU
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