Lethal and sublethal effects of cadmium in the white shrimp Palaemonetes argentinus: A comparison between populations from contaminated and reference sites

In the present study, the acute toxicity of cadmium (Cd) in white shrimp (Palaemonetes argentinus) from a metal polluted lagoon (Los Padres, LP) and from unpolluted lagoon (Nahuel Ruca, NR) was evaluated. Both population, were exposed to 3.06, 12.26, 30.66, 61.32, 306 and 613.2μg Cd.L-1 for 96-h. Th...

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Detalles Bibliográficos
Autores principales: Chiodi Boudet, L., Polizzi, P., Romero, M.B., Robles, A., Gerpe, M.
Formato: JOUR
Lenguaje:English
Materias:
Biomarkers
Cadmium tolerance
Cadmium toxicity
Environmental history
White shrimp
cadmium
metallothionein
thiobarbituric acid reactive substance
biomarker
concentration (composition)
crustacean
detoxification
lipid
pollution exposure
population dynamics
sublethal effect
acute toxicity
animal experiment
article
bioassay
chemosensitivity
comparative study
concentration response
controlled study
ecotoxicology
environmental exposure
environmental factor
female
lagoon
LC 50
lethality
lipid peroxidation
male
nonhuman
Palaemonetes
Palaemonetes argentinus
physical tolerance
protein induction
protein synthesis
seasonal variation
water contamination
Animals
Biological Markers
Cadmium
Environmental Monitoring
Lipid Peroxidation
Metallothionein
Palaemonidae
Seasons
Survival Analysis
Water Pollutants, Chemical
Argentina
Buenos Aires [Argentina]
Laguna Nahuel Ruca
Los Padres Lake
Decapoda (Crustacea)
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01476513_v89_n_p52_ChiodiBoudet
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:In the present study, the acute toxicity of cadmium (Cd) in white shrimp (Palaemonetes argentinus) from a metal polluted lagoon (Los Padres, LP) and from unpolluted lagoon (Nahuel Ruca, NR) was evaluated. Both population, were exposed to 3.06, 12.26, 30.66, 61.32, 306 and 613.2μg Cd.L-1 for 96-h. The sublethal effects of Cd were examined by two cellular biomarkers: metallothionein (MT) and lipid peroxidation (LPO). The seasonal variations of biomarkers in both lagoons were also evaluated.P. argentinus demonstrated a high sensitivity to Cd, with values of 96-h LC50 lower and close to those of highly sensitive species; therefore, can be proposed as a good indicator species. The LC50 values of shrimp from LP (24-h: 269.8, 48-h: 67.45, 72-h: 30.66, 96-h: 24.50μg Cd.L-1) were higher than those from NR (24-h: 153.3, 48-h: 32.65, 72-h: 18.40, 96-h: 12.26μg Cd.L-1), indicating a higher tolerance to Cd, and it was related to their origin. Differential responses in terms of MT induction and LPO between populations were also detected. In NR shrimps, the MT synthesis was induced very fast (24-h) and even at the minimum concentration tested (3.06μg Cd.L-1), while no increases were observed in LPO levels. In contrast, the MT and LPO levels in LP shrimps were not increased relative to control, although they were more tolerant to Cd than those of NR; suggesting the presence of another mechanism involved in the detoxification of Cd. The differences in both sensitivity and biochemical responses to Cd may be related with their environmental histories. © 2012 Elsevier Inc.

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