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dc.contributor.authorCardon, Pierre-Yves
dc.contributor.authorRoques, Olivier
dc.contributor.authorCaron, Antoine
dc.contributor.authorRosabal, Maikel
dc.contributor.authorFortin, Claude
dc.contributor.authorAmyot, Marc
dc.subjectSubcellular partitioningfr
dc.subjectTrophic transferfr
dc.subjectRare earth elementsfr
dc.titleRole of prey subcellular distribution on the bioaccumulation of yttrium (Y) in the rainbow troutfr
dc.contributor.affiliationUniversité de Montréal. Faculté des arts et des sciences. Département de sciences biologiquesfr
dcterms.abstractOur knowledge of the processes leading to the bioaccumulation of rare earth elements (REE) in aquatic biota is limited. As the contamination of freshwater ecosystems by anthropogenic REE have recently been reported, it becomes increasingly urgent to understand how these metals are transferred to freshwater organisms in order to develop appropriate guidelines. We exposed rainbow trout (Oncorhynchus mykiss) to an REE, yttrium (Y), to either a range of Y-contaminated prey (Daphnia magna) or a range of Y-contaminated water. For the feeding experiment, the relationship between the Y assimilation by O. mykiss and the Y subcellular fractionation in D. magna was evaluated. Assimilation efficiency of Y by O. mykiss was low, ranging from 0.8 to 3%. These values were close to the proportion of Y accumulated in D. magna cytosol, 0.6–2%, a theoretical trophically available fraction. Moreover, under our laboratory conditions, water appeared as a poor source of Y transfer to O. mykiss. Regardless of the source of contamination, a similar pattern of Y bioaccumulation among O. mykiss tissues was revealed: muscles < liver < gills < intestine. We conclude that the trophic transfer potential of Y is low and the evaluation of Y burden in prey cytosol appears to be a relevant predictor of Y assimilation by their consumers.fr
UdeM.VersionRioxxVersion acceptée / Accepted Manuscriptfr
oaire.citationTitleEnvironmental pollution

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