Influence of diets supplemented with vitamins C and E on pirarucu (Arapaima gigas) blood parameters |
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Authors: | Jaqueline Inê s Alves de Andrade, Eduardo Akifumi Ono, Glauber Cruz de Menezes, Elenice Martins Brasil, Rodrigo Roubach, Elisabeth Criscuolo Urbinati, Marcos Tavares-Dias, Jaydione Luiz Marcon,Elizabeth Gusm o Affonso |
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Affiliation: | Jaqueline Inês Alves de Andrade, Eduardo Akifumi Ono, Glauber Cruz de Menezes, Elenice Martins Brasil, Rodrigo Roubach, Elisabeth Criscuolo Urbinati, Marcos Tavares-Dias, Jaydione Luiz Marcon,Elizabeth Gusmão Affonso, |
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Abstract: | This study evaluated the influence of diets supplemented with 500, 800, 1200 mg kg− 1 of vitamin C (ascorbic acid or AA) and vitamin E (α-tocopherol or α-T) on the physiological responses of pirarucu fed for 2 months. Weight and mortality were not affected by dietary vitamin type or their concentrations. Significant increase (p < 0.05) on the red blood cells count was obtained on treatments with 800 and 1200 mg AA kg− 1 and on the hemoglobin concentration on treatment with 500 mg α-T kg− 1 relatively to control. Mean corpuscular volume presented a significant decrease (p < 0.05) on treatment with 800 and 1200 mg AA kg−1 when compared to control. Mean corpuscular hemoglobin concentration was significantly high (p < 0.05) on treatment with 500 mg α-T kg− 1. Only in vitamin C treatments, we noticed a significant increase (p < 0.05) in the number of leucocytes relative to control. All fish in the vitamin-supplemented treatments, except 500 mg AA kg− 1, had high total protein values compared to control. Fish treated with 800 or 1200 mg α-T kg− 1 also showed increases in plasma glucose concentrations. Our results suggest that 800 and 1200 mg AA kg− 1 are probably the most suitable concentrations for pirarucu diets, although high vitamin E diets are not necessary for quantitative leucocyte increases for this species. |
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Keywords: | α -Tocopherol Ascorbic acid Fish Hematology Metabolism Physiology Stress |
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