Temperature and hypoxia on oxidative stress responses in pacu Piaractus mesopotamicus |
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| Affiliation: | 1. Department of Women''s and Children''s Health, University of Padova, Padova, Italy;2. Department of Aquaculture and Fisheries, Agricultural University of Tirana, Tirana, Albania;3. Department of Molecular Medicine, University of Padova, Italy;4. Departmentof of Biology, Ecology and Earth Sciences (B.E.S.T.), University of Calabria, Arcavacata di Rende, Italy;5. Department of Life Sciences, University of Trieste, Trieste, Italy;6. Department of Pharmacology, University of Arizona, Tucson, AZ, USA;7. Department of Biology, Sonoma State University, Rohnert Park, CA, USA;8. Department of Biology, University of Padova, Padova, Italy;1. Programa de Pós Graduação em Farmacologia, UFSM, Universidade Federal de Santa Maria (UFSM), Av. Roraima n° 1000, Cidade Universitária, Camobi, Santa Maria 97105-900, RS, Brazil;2. Departamento de Fisiologia e Farmacologia, UFSM, Universidade Federal de Santa Maria (UFSM), Av. Roraima n° 1000, Cidade Universitária, Camobi, Santa Maria 97105-900, RS, Brazil;3. Programa de Pós Graduação em Bioquímica Toxicológica, UFSM, Universidade Federal de Santa Maria (UFSM), Av. Roraima n° 1000, Cidade Universitária, Camobi, Santa Maria 97105-900, RS, Brazil;4. Programa de Pós-graduação em Química, UFSM, Universidade Federal de Santa Maria (UFSM), Av. Roraima n° 1000, Cidade Universitária, Camobi, Santa Maria 97105-900, RS, Brazil;1. Departamento de Zoología, Universidad de Granada, Campus de Fuentenueva, 18071 Granada, Spain;2. CIMAR/CIIMAR-Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal;3. Planta de Cultivos Marinos, Instituto Español de Oceanografía, Mazarrón, 30870 Murcia, Spain |
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| Abstract: | The aim of this study was to verify the effects of the interaction between different temperatures and levels of dissolved oxygen in the oxidative stress parameters of pacu juveniles. A total of 81 pacu juveniles (61.7 ± 9.1 g) were exposed to three temperatures (18, 23, and 28 °C), acclimated for a period of 30 days, and then submitted to three levels of dissolved oxygen: control or normoxia (7 mg L−1); moderate hypoxia (4 mg L−1); and severe hypoxia (2 mg L−1) for 12 h. Glutathione-S-transferase (GST) activity, total antioxidant capacity against peroxyl radicals (ACAP), and protein thiol content (PSH) and LPO (lipid peroxidation) [measured by the TBARS] were measured in gill, liver, muscle and brain. The results indicated that the interaction between different temperatures and dissolved oxygen levels caused alterations in the antioxidant system and induced lipid and protein damage in pacu juveniles. In addition, the effects were organ specific. In conclusion, exposure to moderate and severe hypoxia affect oxidative stress parameters and have been shown to be organ-specific in pacu juveniles. The interaction between 23 °C and hypoxia caused greater disturbances in oxidative stress markers, such as PSH in the gills and liver and LPO in the muscle. |
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| Keywords: | Biochemical parameters Glutathione-S-Transferase Lipoperoxidation Redox status |
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