Bioaccumulation and retention kinetics of cadmium in the freshwater decapod Macrobrachium australiense

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dc.contributor.authorCresswell, Ten_AU
dc.contributor.authorSimpson, SLen_AU
dc.contributor.authorSmith, REWen_AU
dc.contributor.authorNugegoda, Den_AU
dc.contributor.authorMazumder, Den_AU
dc.contributor.authorTwining, JRen_AU
dc.date.accessioned2016-07-04T02:49:49Zen_AU
dc.date.available2016-07-04T02:49:49Zen_AU
dc.date.issued2014-03en_AU
dc.date.statistics2016-07-07en_AU
dc.description.abstractThe potential sources and mechanisms of cadmium bioaccumulation by the native freshwater decapods Macrobrachium species in the waters of the highly turbid Strickland River in Papua New Guinea were examined using 109Cd-labelled water and food sources and the Australian species Macrobrachium australiense as a surrogate. Synthetic river water was spiked with environmentally relevant concentrations of cadmium and animals were exposed for 7 days with daily renewal of test solutions. Dietary assimilation of cadmium was assessed through pulse-chase experiments where prawns were fed separately 109Cd-labelled fine sediment, filamentous algae and carrion (represented by cephalothorax tissue of water-exposed prawns). M. australiense readily accumulated cadmium from the dissolved phase and the uptake rate increased linearly with increasing exposure concentration. A cadmium uptake rate constant of 0.10 ± 0.05 L/g/d was determined in synthetic river water. During depuration following exposure to dissolved cadmium, efflux rates were low (0.9 ± 5%/d) and were not dependent on exposure concentration. Assimilation efficiencies of dietary sources were comparable for sediment and algae (48–51%), but lower for carrion (28 ± 5%) and efflux rates were low (0.2–2.6%/d) demonstrating that cadmium was well retained by M. australiense. A biokinetic model of cadmium accumulation by M. australiense predicted that for exposures to environmentally relevant cadmium concentrations in the Strickland River, uptake from ingestion of fine sediment and carrion would be the predominant sources of cadmium to the organism. The model predicted the total dietary route would represent 70–80% of bioaccumulated cadmium © 2014, Elsevier B.V.en_AU
dc.identifier.citationCresswell, T., Simpson, S. L., Smith, R. E. W., Nugegoda, D., Mazumder, D., & Twining, J. (2014). Bioaccumulation and retention kinetics of cadmium in the freshwater decapod Macrobrachium australiense. Aquatic Toxicology, 148(0), 174-183. doi: http://dx.doi.org/10.1016/j.aquatox.2014.01.006en_AU
dc.identifier.govdoc6785en_AU
dc.identifier.issn0166-445Xen_AU
dc.identifier.journaltitleAquatic Toxicologyen_AU
dc.identifier.pagination174-183en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.aquatox.2014.01.006en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7137en_AU
dc.identifier.volume148en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectRadioisotopesen_AU
dc.subjectMetalsen_AU
dc.subjectBiological accumulationen_AU
dc.subjectDieten_AU
dc.subjectRiversen_AU
dc.subjectCadmiumen_AU
dc.titleBioaccumulation and retention kinetics of cadmium in the freshwater decapod Macrobrachium australienseen_AU
dc.typeJournal Articleen_AU
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