Comparative accumulation of Cd-109 and Se-75 from water and food by an estuarine fish (Tetractenos glaber)

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dc.contributor.authorAlquezar, Ren_AU
dc.contributor.authorMarkich, SJen_AU
dc.contributor.authorTwining, JRen_AU
dc.date.accessioned2009-10-07T23:17:11Zen_AU
dc.date.accessioned2010-04-30T05:03:22Zen_AU
dc.date.available2009-10-07T23:17:11Zen_AU
dc.date.available2010-04-30T05:03:22Zen_AU
dc.date.issued2008-01en_AU
dc.date.statistics2008-01en_AU
dc.description.abstractFew data are available on the comparative accumulation of metal(loid)s from water and food in estuarine/marine fish. Smooth toadfish (Tetractenos glaber), commonly found in estuaries in south-eastern Australia, were separately exposed to radio-labelled seawater (14 kBq L-1 of Cd-109 and 24 kBq L-1 of Se-75) and food (ghost shrimps; Trypaea australiensis: 875 Bq g(-1) Cd-109 and 1130 Bq g(-1) Se-75) for 25 days (uptake phase), followed by exposure to radionuclide-free water or food for 30 days (loss phase). Toadfish accumulated Cd-109 predominantly from water (85%) and Se-75 predominantly from food (62%), although the latter was lower than expected. For both the water and food exposures, Cd-109 was predominantly located in the gut lining (60-75%) at the end of the uptake phase, suggesting that the gut may be the primary pathway of Cd-109 uptake. This may be attributed to toadfish drinking large volumes of water to maintain osmoregulation. By the end of the loss phase, Cd-109 had predominantly shifted to the excretory organs - the liver (81%) in toadfish exposed to radio-labelled food, and in the liver, gills and kidney (82%) of toadfish exposed to radio-labelled water. In contrast, Se-75 was predominantly located in the excretory organs (gills, kidneys and liver; 66-76%) at the end of the uptake phase, irrespective of the exposure pathway, with minimal change in percentage distribution (76-83%) after the loss phase. This study emphasises the importance of differentiating accumulation pathways to better understand metal(loid) transfer dynamics and subsequent toxicity, in aquatic biota. © 2007, Elsevier Ltd.en_AU
dc.identifier.citationAlquezar, R., Markich, S. J., & Twining, J. R. (2008). Comparative accumulation of Cd-109 and Se-75 from water and food by an estuarine fish (Tetractenos glaber). Journal of Environmental Radioactivity, 99(1), 167-180. doi:10.1016/j.jenvrad.2007.07.012en_AU
dc.identifier.govdoc1218en_AU
dc.identifier.issn0265-931Xen_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleJournal of Environmental Radioactivityen_AU
dc.identifier.pagination167-180en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jenvrad.2007.07.012en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1969en_AU
dc.identifier.volume99en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectFishesen_AU
dc.subjectAquatic ecosystemsen_AU
dc.subjectEstuariesen_AU
dc.subjectUptakeen_AU
dc.subjectRadioisotopesen_AU
dc.subjectSemimetalsen_AU
dc.titleComparative accumulation of Cd-109 and Se-75 from water and food by an estuarine fish (Tetractenos glaber)en_AU
dc.typeJournal Articleen_AU
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