Produção Nacional
Revisado por pares
Redox profile in liver of Leporinus macrocephalus exposed to different dissolved oxygen levels
2011; Springer Science+Business Media; Volume: 38; Issue: 3 Linguagem: Inglês
10.1007/s10695-011-9563-3
ISSN1573-5168
AutoresAna Paula Konzen Riffel, Luciano Garcia, Isabela Finamor, Etiane M.H. Saccol, Míriam Dos Santos Meira, Carolina Kolberg, Andréa Horst, Wania Aparecida Partata, Susana Llesuy, Bernardo Baldisserotto, Maria A. Pavanato,
Tópico(s)Environmental Toxicology and Ecotoxicology
ResumoAquatic organisms are continuously exposed to environmental variations, which can lead to physiological and biochemical alterations. Leporinus macrocephalus, known as piavuçu, is a migratory species that may be exposed to variations in dissolved oxygen levels. Studies evaluating oxidative changes undergone by this species in these conditions are scarce. Therefore, this investigation aimed at evaluating oxidative alterations in L. macrocephalus exposed to different oxygen levels for 96 h: 6.12 ± 0.18, 3.99 ± 0.17, 3.22 ± 0.17, 2.47 ± 0.30 and 0.710 ± 0.07 mg L(-1). At the end of the experimental period, fish were euthanized and livers used to determine lipid hydroperoxides, thiobarbituric acid reactive substances, catalase, glutathione-S-transferase, superoxide dismutase and thiol groups, which are an indirect measure of reduced glutathione. Results indicated a decrease in the studied parameters in hypoxic situations, suggesting a possible metabolic depression.
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