Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination

The objective of this study was to investigate the possible link between cadmium exposure, hepatic markers of oxidative stress and aggressive behavior in Nile tilapia (Oreochromis niloticus). Fish were first exposed to 0.75 mg/L CdCl2 for 15 days (12 isolated fish for each group) and afterward a behavioral test was performed. Fish from the control and cadmium-exposed groups were paired for 1 h (6 pairs of fish per group) for determination of aggressiveness parameters. Immediately after the behavioral test, the animals were sacrificed and the liver was used to determine biochemical parameters. Cadmium decreased aggression in Nile tilapia. Subordinate animals exposed to cadmium showed decreased glutathione peroxidase (GSH-Px) activity compared to dominant ones. No alterations were observed in selenium-dependent glutathione peroxidase Se-GSH-P and Cu-Zn superoxide dismutase activities, but total superoxide dismutase activity was increased in subordinate animals exposed to cadmium compared to subordinate control. Catalase activity was increased in cadmium-exposed fish. Lipoperoxide concentrations also increased in cadmium exposed fish indicating that cadmium toxicity may affect oxidative stress biomarkers in Nile tilapia. Social stress induced lipoperoxidation in Nile tilapia, and subordinate animals exposed to cadmium responded with lower activities of liver antioxidant enzymes compared to dominant fish. The present study shows that cadmium exposure is capable of inducing changes in the social status and oxidative stress parameters in this species.

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Main Authors: Almeida,Jeane A., Barreto,Rodrigo E., Novelli,Ethel L. B., Castro,Fabio J., Moron,Sandro E.
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Ictiologia 2009
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100013
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spelling oai:scielo:S1679-622520090001000132009-04-09Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contaminationAlmeida,Jeane A.Barreto,Rodrigo E.Novelli,Ethel L. B.Castro,Fabio J.Moron,Sandro E. Oreochromis niloticus Stress response Antioxidant enzymes Social stress Liver Nile tilapia The objective of this study was to investigate the possible link between cadmium exposure, hepatic markers of oxidative stress and aggressive behavior in Nile tilapia (Oreochromis niloticus). Fish were first exposed to 0.75 mg/L CdCl2 for 15 days (12 isolated fish for each group) and afterward a behavioral test was performed. Fish from the control and cadmium-exposed groups were paired for 1 h (6 pairs of fish per group) for determination of aggressiveness parameters. Immediately after the behavioral test, the animals were sacrificed and the liver was used to determine biochemical parameters. Cadmium decreased aggression in Nile tilapia. Subordinate animals exposed to cadmium showed decreased glutathione peroxidase (GSH-Px) activity compared to dominant ones. No alterations were observed in selenium-dependent glutathione peroxidase Se-GSH-P and Cu-Zn superoxide dismutase activities, but total superoxide dismutase activity was increased in subordinate animals exposed to cadmium compared to subordinate control. Catalase activity was increased in cadmium-exposed fish. Lipoperoxide concentrations also increased in cadmium exposed fish indicating that cadmium toxicity may affect oxidative stress biomarkers in Nile tilapia. Social stress induced lipoperoxidation in Nile tilapia, and subordinate animals exposed to cadmium responded with lower activities of liver antioxidant enzymes compared to dominant fish. The present study shows that cadmium exposure is capable of inducing changes in the social status and oxidative stress parameters in this species.info:eu-repo/semantics/openAccessSociedade Brasileira de IctiologiaNeotropical Ichthyology v.7 n.1 20092009-03-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100013en10.1590/S1679-62252009000100013
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
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region America del Sur
libraryname SciELO
language English
format Digital
author Almeida,Jeane A.
Barreto,Rodrigo E.
Novelli,Ethel L. B.
Castro,Fabio J.
Moron,Sandro E.
spellingShingle Almeida,Jeane A.
Barreto,Rodrigo E.
Novelli,Ethel L. B.
Castro,Fabio J.
Moron,Sandro E.
Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination
author_facet Almeida,Jeane A.
Barreto,Rodrigo E.
Novelli,Ethel L. B.
Castro,Fabio J.
Moron,Sandro E.
author_sort Almeida,Jeane A.
title Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination
title_short Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination
title_full Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination
title_fullStr Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination
title_full_unstemmed Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination
title_sort oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination
description The objective of this study was to investigate the possible link between cadmium exposure, hepatic markers of oxidative stress and aggressive behavior in Nile tilapia (Oreochromis niloticus). Fish were first exposed to 0.75 mg/L CdCl2 for 15 days (12 isolated fish for each group) and afterward a behavioral test was performed. Fish from the control and cadmium-exposed groups were paired for 1 h (6 pairs of fish per group) for determination of aggressiveness parameters. Immediately after the behavioral test, the animals were sacrificed and the liver was used to determine biochemical parameters. Cadmium decreased aggression in Nile tilapia. Subordinate animals exposed to cadmium showed decreased glutathione peroxidase (GSH-Px) activity compared to dominant ones. No alterations were observed in selenium-dependent glutathione peroxidase Se-GSH-P and Cu-Zn superoxide dismutase activities, but total superoxide dismutase activity was increased in subordinate animals exposed to cadmium compared to subordinate control. Catalase activity was increased in cadmium-exposed fish. Lipoperoxide concentrations also increased in cadmium exposed fish indicating that cadmium toxicity may affect oxidative stress biomarkers in Nile tilapia. Social stress induced lipoperoxidation in Nile tilapia, and subordinate animals exposed to cadmium responded with lower activities of liver antioxidant enzymes compared to dominant fish. The present study shows that cadmium exposure is capable of inducing changes in the social status and oxidative stress parameters in this species.
publisher Sociedade Brasileira de Ictiologia
publishDate 2009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100013
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