Aloysia triphylla essential oil as food additive for Rhamdia quelen – Stress and antioxidant parameters |
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| Authors: | CC Zeppenfeld EMH Saccol TS Pês J Salbego G Koakoski AC dos Santos BM Heinzmann MA da Cunha LJG Barcellos MA Pavanato BO Caron B Baldisserotto |
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| Affiliation: | 1. Departamento de Fisiologia e Farmacologia, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brasil;2. Programa de Pós‐gradua??o em Bioexperimenta??o, Faculdade de Agronomia e Medicina Veterinária, Universidade de Passo Fundo, Passo Fundo, Rio Grande do Sul, Brasil;3. Departamento de Farmácia Industrial, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brasil;4. Departamento de Ciências Agr?nomicas e Ambientais, Centro de Educa??o Superior Norte, Universidade Federal de Santa Maria, Frederico Westphalen, Rio Grande do Sul, Brasil |
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| Abstract: | We examined the effects of dietary supplementation for 21 days with different levels (0, 0.25 and 2.0 ml/kg) of the Aloysia triphylla essential oil (EOAT) on silver catfish (Rhamdia quelen). Cortisol levels were lower in fish fed EOAT at 2.0 ml/kg diet, and lactate levels were lower in those fed at both doses. Glucose, alanine aminotransferase, aspartate aminotransferase and triglyceride levels did not vary between groups. The biomarkers of oxidative stress, thiobarbituric acid‐reactive substances, lipid hydroperoxide, superoxide dismutase, catalase and non‐protein thiols, were lower in the brain, liver and muscle of fish fed EOAT at 2.0 ml EO/kg diet. Glutathione‐S‐transferase, reduced glutathione, plasma Na+, Cl?, and K+, and gill Na+/K+‐ATPase and H+‐ATPase did not vary between groups. Taken together, our results clearly indicate that the addition of EOAT at 2.0 ml/kg diet improves oxidative status and lowers the stress response in silver catfish. |
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| Keywords: | food additive osmoregulatory parameters oxidative stress |
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