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dc.contributor.authorCrémazy, Anne-
dc.contributor.authorWood, Chris M.-
dc.contributor.authorSmith, Donald Scott-
dc.contributor.authorFerreira, Márcio Soares-
dc.contributor.authorJohannsson, Ora E.-
dc.contributor.authorGiacomin, Marina Mussoi-
dc.contributor.authorVal, Adalberto Luis-
dc.date.accessioned2020-06-15T21:40:16Z-
dc.date.available2020-06-15T21:40:16Z-
dc.date.issued2016-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/17236-
dc.description.abstractCopper at high concentrations is an ionoregulatory toxicant in fish and its toxicity is known to be strongly modulated by the water chemistry. The toxicity of Cu to the tropical fish cardinal tetra (Paracheirodon axelrodi) was investigated in waters from two major rivers of the Amazon watershed: the Rio Negro (filtered <0.45 μm, pH 5.6, DOC = 8.4 mg L−1, Na = 33 μM, Ca = 8 μM) and the Rio Solimões (filtered <0.45 μm, pH 6.7, DOC = 2.8 mg L−1, Na = 185 μM, Ca = 340 μM), as well as in a natural “reference water” (groundwater) which was almost DOC-free (pH 6.0, DOC = 0.34 mg L−1, Na = 53 μM, Ca = 5 μM). Acute 96-h mortality, Cu bioaccumulation and net flux rates of Na+, Cl−, K+ and total ammonia were determined in P. axelrodi exposed in each water. Copper speciation in each water was determined by two thermodynamic models and by potentiometry, and its toxicity was predicted based on the biotic ligand model (BLM) framework. Our results indicate that high Na+ loss is the main mode of toxic action of Cu in P. axelrodi, in accordance with general theory. Cardinal tetra showed a particularly high ability to tolerate Cu and to maintain Na+ balance, similar to the ability of this and other endemic Rio Negro species to tolerate low pH and ion-poor conditions. Cu toxicity was lower in Rio Negro than in the other two waters tested, and the free [Cu2+] at the LC50, as determined by any of the three speciation methods tested, was approximately 10-fold higher. This variation could not be captured by a realistic set of BLM parameters. At least in part, this observation may be due to gill physiological alterations induced by the abundant dissolved organic matter of the Rio Negro. The implication of this observation is that, for metals risk assessment in tropical waters, similar to the Rio Negro, care must be used in applying BLM models developed using temperate DOC and temperate species. © 2016en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 180, Pags. 353-363pt_BR
dc.rightsRestrito*
dc.subjectAmmoniaen
dc.subjectChlorineen
dc.subjectCopperen
dc.subjectDissolved Organic Matteren
dc.subjectPotassiumen
dc.subjectRiver Wateren
dc.subjectSodiumen
dc.subjectAmmoniaen
dc.subjectAnionen
dc.subjectChlorideen
dc.subjectCopperen
dc.subjectDivalent Cationen
dc.subjectMonovalent Cationen
dc.subjectPotassiumen
dc.subjectSodiumen
dc.subjectBioaccumulationen
dc.subjectCopperen
dc.subjectDissolved Organic Matteren
dc.subjectFishen
dc.subjectModelingen
dc.subjectMortalityen
dc.subjectPhysiological Responseen
dc.subjectToxicityen
dc.subjectAcute Toxicityen
dc.subjectAmazonasen
dc.subjectAnimals Experimenten
dc.subjectAnimals Tissueen
dc.subjectBioaccumulationen
dc.subjectBiotic Ligand Modelen
dc.subjectEcotoxicityen
dc.subjectFishen
dc.subjectGeographic Distributionen
dc.subjectIon Transporten
dc.subjectMortalityen
dc.subjectNonhumanen
dc.subjectParacheirodon Axelrodien
dc.subjectPhen
dc.subjectPotentiometryen
dc.subjectPriority Journalen
dc.subjectThermodynamicsen
dc.subjectWatersheden
dc.subjectAnimalsen
dc.subjectBiological Modelen
dc.subjectCharacidaeen
dc.subjectChemistryen
dc.subjectMetabolismen
dc.subjectRiveren
dc.subjectToxicityen
dc.subjectToxicity Testingen
dc.subjectWater Pollutanten
dc.subjectAmazonasen
dc.subjectRio Negro [south America]en
dc.subjectSolimoes Riveren
dc.subjectParacheirodon Axelrodien
dc.subjectAmmoniaen
dc.subjectAnimalen
dc.subjectAnionsen
dc.subjectCations, Divalenten
dc.subjectCations, Monovalenten
dc.subjectCharacidaeen
dc.subjectChloridesen
dc.subjectCopperen
dc.subjectModels, Biologicalen
dc.subjectPotassiumen
dc.subjectRiversen
dc.subjectSodiumen
dc.subjectToxicity Tests, Acuteen
dc.subjectWater Pollutants, Chemicalen
dc.titleInvestigating copper toxicity in the tropical fish cardinal tetra (Paracheirodon axelrodi) in natural Amazonian waters: Measurements, modeling, and realityen
dc.typeArtigopt_BR
dc.identifier.doi10.1016/j.aquatox.2016.10.011-
dc.publisher.journalAquatic Toxicologypt_BR
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