Physiological impacts and bioaccumulation of dietary Cu and Cd in a model teleost: The Amazonian tambaqui (Colossoma macropomum)

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dc.contributor.authorGiacomin, Marina
dc.contributor.authorVilarinho, Gisele C.
dc.contributor.authorCastro, Katia F.
dc.contributor.authorFerreira, Márcio
dc.contributor.authorDuarte, Rafael M. [UNESP]
dc.contributor.authorWood, Chris M.
dc.contributor.authorVal, Adalberto L.
dc.contributor.institutionThe University of British Columbia
dc.contributor.institutionInstituto Nacional de Pesquisas da Amazônia (INPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionMcMaster University
dc.contributor.institutionUniversity of Miami
dc.date.accessioned2018-12-11T16:52:36Z
dc.date.available2018-12-11T16:52:36Z
dc.date.issued2018-06-01
dc.description.abstractIncreasing anthropogenic activities in the Amazon have led to elevated metals in the aquatic environment. Since fish are the main source of animal protein for the Amazonian population, understanding metal bioaccumulation patterns and physiological impacts is of critical importance. Juvenile tambaqui, a local model species, were exposed to chronic dietary Cu (essential, 500 μg Cu/g food) and Cd (non-essential, 500 μg Cd/g food). Fish were sampled at 10–14, 18–20 and 33–36 days of exposure and the following parameters were analyzed: growth, voluntary food consumption, conversion efficiency, tissue-specific metal bioaccumulation, ammonia and urea-N excretion, O2 consumption, Pcrit, hypoxia tolerance, nitrogen quotient, major blood plasma ions and metabolites, gill and gut enzyme activities, and in vitro gut fluid transport. The results indicate no ionoregulatory impacts of either of the metal-contaminated diets at gill, gut, or plasma levels, and no differences in plasma cortisol or lactate. The Cd diet appeared to have suppressed feeding, though overall tank growth was not affected. Bioaccumulation of both metals was observed. Distinct tissue-specific and time-specific patterns were seen. Metal burdens in the edible white muscle remained low. Overall, physiological impacts of the Cu diet were minimal. However dietary Cd increased hypoxia tolerance, as evidenced by decreased Pcrit, increased time to loss of equilibrium, a lack of plasma glucose elevation, decreased plasma ethanol, and decreased NQ during hypoxia. Blood O2 transport characteristics (P50, Bohr coefficient, hemoglobin, hematocrit) were unaffected, suggesting that tissue level changes in metabolism accounted for the greater hypoxia tolerance in tambaqui fed with a Cd-contaminated diet.en
dc.description.affiliationDepartment of Zoology The University of British Columbia
dc.description.affiliationLaboratory of Ecophysiology and Molecular Evolution Instituto Nacional de Pesquisas da Amazônia (INPA)
dc.description.affiliationSão Paulo State University (UNESP) Institute of Biosciences
dc.description.affiliationDepartment of Biology McMaster University
dc.description.affiliationRosenstiel School of Marine and Atmospheric Science University of Miami
dc.description.affiliationUnespSão Paulo State University (UNESP) Institute of Biosciences
dc.description.sponsorshipInstituto Nacional de Ciência e Tecnologia Centro de Estudos das Adaptações da Biota Aquática da Amazônia
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada
dc.format.extent30-45
dc.identifierhttp://dx.doi.org/10.1016/j.aquatox.2018.03.021
dc.identifier.citationAquatic Toxicology, v. 199, p. 30-45.
dc.identifier.doi10.1016/j.aquatox.2018.03.021
dc.identifier.file2-s2.0-85044502642.pdf
dc.identifier.issn1879-1514
dc.identifier.issn0166-445X
dc.identifier.lattes3055795777787612
dc.identifier.orcid0000-0001-5649-0692
dc.identifier.scopus2-s2.0-85044502642
dc.identifier.urihttp://hdl.handle.net/11449/170831
dc.language.isoeng
dc.relation.ispartofAquatic Toxicology
dc.relation.ispartofsjr1,456
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectDietary metals
dc.subjectHypoxia
dc.subjectPcrit
dc.subjectTissue accumulation
dc.subjectTropical teleost
dc.titlePhysiological impacts and bioaccumulation of dietary Cu and Cd in a model teleost: The Amazonian tambaqui (Colossoma macropomum)en
dc.typeArtigo
unesp.author.lattes3055795777787612[5]
unesp.author.orcid0000-0001-5649-0692[5]

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