Artículo
Toxicological responses of Laeonereis acuta (Polychaeta, Nereididae) after acute, subchronic and chronic exposure to cadmium
Dolagaratz Carricavur, Arantxa
; Chiodi Boudet, Leila Natalia
; Romero, María Belén
; Polizzi, Paula Sabrina
; Marcovecchio, Jorge Eduardo
; Gerpe, Marcela Silvia
Fecha de publicación:
03/2018
Editorial:
Academic Press Inc Elsevier Science
Revista:
Ecotoxicology and Environmental Safety
ISSN:
0147-6513
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The objective of this study was to analyze the toxicological responses of the estuarine polychaete Laeonereis acuta after acute (96 h), subchronic (7 days) and chronic (14 days) exposure to cadmium (Cd). Concentrations of metallothioneins (MT), lipid peroxidation (LPO), total Cd and metal-rich granules (MRG) were evaluated. Seasonal variations of MT and LPO levels in the wild were also measured. Polychaetes were obtained in the Quequén estuary located southeast of Buenos Aires Province, Argentina. For the acute toxicity assay, individuals were exposed to 10; 30, 65; 310; 600; 1300; 2000; 4300; 8100; 16300 µgCd L−1, which included levels of environmental relevance and median lethal concentrations (LC50) for related species of polychaete. Based on 96 h LC50 values, polychaetes were exposed to sublethal doses of Cd. The concentrations for both subchronic and chronic assays were: 10; 30; 65; 310; 600; 1300; 2000; 4300 µgCd L−1. The 96 h LC50 value was 8234.9 µg L−1, which was within the values reported for other species of polychaete, indicating a high tolerance to Cd. MT induction was not observed for any time exposure. In additoin, LPO levels showed no differences with respect to control levels, which indicated an absence of oxidative damage caused by Cd. However, the total Cd and MRG-Cd concentrations in L. acuta in all tested treatments showed significant differences with respect to control levels. L. acuta were able to accumulate Cd in their tissues in the form of granules which are the main mechanism of Cd detoxification.
Palabras clave:
ANNELID
,
LIPID PEROXIDATION
,
METAL
,
METAL-RICH GRANULES
,
METALLOTHIONEIN
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IADO)
Articulos de INST.ARG.DE OCEANOGRAFIA (I)
Articulos de INST.ARG.DE OCEANOGRAFIA (I)
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Citación
Dolagaratz Carricavur, Arantxa; Chiodi Boudet, Leila Natalia; Romero, María Belén; Polizzi, Paula Sabrina; Marcovecchio, Jorge Eduardo; et al.; Toxicological responses of Laeonereis acuta (Polychaeta, Nereididae) after acute, subchronic and chronic exposure to cadmium; Academic Press Inc Elsevier Science; Ecotoxicology and Environmental Safety; 149; 3-2018; 217-224
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