Effect of short-term dietary exposure on metal assimilation and metallothionein induction in the estuarine fish Pseudogobius sp.

Simple item page
dc.contributor.authorMcDonald, Sen_AU
dc.contributor.authorHassell, Ken_AU
dc.contributor.authorCresswell, Ten_AU
dc.date.accessioned2021-12-08T22:15:45Zen_AU
dc.date.available2021-12-08T22:15:45Zen_AU
dc.date.issued2021-06-10en_AU
dc.date.statistics2021-11-17en_AU
dc.description.abstractMetals introduced into the urban aquatic environment through anthropogenic activities have the potential to accumulate in organisms via multiple uptake routes. Understanding the impact different routes have on metal accumulation is important for the continued management of these ecosystems, where current water quality guidelines (WQGs) tend to be derived from aqueous metal exposure tests. In this study, the estuarine fish Pseudogobius sp. was exposed to a mixture of cadmium (Cd) and zinc (Zn) radiotracers dissolved in water or present in experimental food. Metal-spiked food was presented to fish as a single ‘pulse-chase’ feed or as three consecutive feeds, where the cumulative metal dose provided by both treatments was equal. Fish did not accumulate either metal from water, even after the length of exposure was increased from 12 h to 36 h. Fish did accumulate metals from diet and the assimilation efficiency (AE) was low following a single feed (12% for both Cd and Zn). Following multiple feeds fish displayed a significantly higher AE for zinc only, suggesting that fish are susceptible to retention of dietary Zn over an extended time period albeit at lower daily loadings. The final body burden and efflux rate did not differ between feeding regimes. Tissue accumulation of Cd and Zn indicated metal specific distribution. The gastro-intestinal (GI) tract contained >90% of total Cd body burden, whilst the carcass accounted for the majority (70–88%) of Zn body burden. There was significant induction of the biomarker metallothionein (MT) in the GI tract. These results demonstrate the differences in Cd and Zn metal uptake characteristics in this estuarine fish species, and how feeding frequency and metal loading of food may influence assimilation. This study highlights the importance of considering the inclusion of dietary exposures in WQG frameworks. ©2021 Elsevier B.Ven_AU
dc.description.sponsorshipThis study was carried out at Australia's Nuclear Science and Technology Organisation (ANSTO) under ANSTO Research Portal AP12070 with the assistance of an Australian Institute of Nuclear Science and Engineering (AINSE) Post-Graduate Research Award and a Holsworth Wildlife Research Endowment Award from the Ecological Society of Australia, both awarded to S. McDonald.en_AU
dc.identifier.articlenumber145042en_AU
dc.identifier.citationMcDonald, S., Hassell, K., & Cresswell, T. (2021). Effect of short-term dietary exposure on metal assimilation and metallothionein induction in the estuarine fish Pseudogobius sp. Science of the Total Environment, 772, 145042. doi:10.1016/j.scitotenv.2021.145042en_AU
dc.identifier.issn0048-9697en_AU
dc.identifier.journaltitleScience of the Total Environmenten_AU
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2021.145042en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12400en_AU
dc.identifier.volume772en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCadmiumen_AU
dc.subjectZincen_AU
dc.subjectTracer techniquesen_AU
dc.subjectFooden_AU
dc.subjectFishesen_AU
dc.subjectWateren_AU
dc.subjectEstuariesen_AU
dc.subjectMetalsen_AU
dc.subjectAquatic ecosystemsen_AU
dc.subjectWater qualityen_AU
dc.titleEffect of short-term dietary exposure on metal assimilation and metallothionein induction in the estuarine fish Pseudogobius sp.en_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles