Acute ecotoxicity and bioconcentration tests for Se(IV) in Nile tilapia (Oreochromis niloticus).

Vista sencilla de ítem
dc.contributorPEDRO HENRIQUE DA COSTA, UNIVERSIDADE ESTADUAL PAULISTA
dc.contributorANA RITA DE ARAUJO NOGUEIRA, CPPSE
dc.contributorEDUARDO BESSA AZEVEDO, UNIVERSIDADE DE SÃO PAULO
dc.contributorMARIO HENRIQUE GONZALEZ, UNIVERSIDADE ESTADUAL PAULISTA.
dc.creatorCOSTA, P. H. DA
dc.creatorNOGUEIRA, A. R. de A.
dc.creatorAZEVEDO, E. B.
dc.creatorGONZALEZ, M. H.
dc.date2025-01-15T14:47:13Z
dc.date2025-01-15T14:47:13Z
dc.date2025-01-15
dc.date2024
dc.date.accessioned2026-07-07T05:34:05Z
dc.descriptionSelenium is one of the most important trace element micronutrients for the globalbiota, mainly due to its role in protecting against oxidative stress. However, this element canbecome toxic when present at concentrations slightly higher than those needed for metabolicpurposes. It can be transferred through the food chain toward higher trophic levels, withbioaccumulation and biomagnification leading to possible toxicity. This study investigates thebioconcentration and toxicity potential of Se(IV) in Nile tilapia (Oreochromis niloticus). After 7days of exposure, Se concentrations in the fish tissues were in the order: liver ≫ stomach > gills >muscle. In bioconcentration tests, the uptake constant (ka) ranged from 0.34 to 4.68 mL g−1 d−1,while the clearance rate constant (kd) ranged from 0.12 to 0.36 d−1. The tissues presented highbioconcentration factors (BCF) ranging from 2.67 to 12.73, demonstrating the ability of Se(IV) toconcentrate in muscle, gills, and stomach. Although the data for the liver could not be fitted by themodel used, the measured Se(IV) concentrations were approximately six times higher than thosefound for the stomach, indicating that the ka, kd, and BCF values were very high. Estimated LC50values lower than 10 mg L−1 suggested that Se(IV) could be considered very toxic to the fish.
dc.formatp. 48315-48322.
dc.identifierACS Omega, v. 9, issue 49, dec. 2024.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1171555
dc.identifierhttps://doi.org/10.1021/acsomega.4c06165
dc.identifier.urihttp://hdl.handle.net/123456789/495234
dc.languageeng
dc.rightsopenAccess
dc.subjectAnatomy
dc.subjectElements
dc.subjectImpurities
dc.subjectLiquid chromatography
dc.subjectToxicity
dc.subjectSelenium
dc.titleAcute ecotoxicity and bioconcentration tests for Se(IV) in Nile tilapia (Oreochromis niloticus).
dc.typeArtigo de periódico

Archivos

Colecciones

Embrapa Pecuaria Sudeste (CPPSE)