Hematology of Piaractus mesopotamicus fed diets supplemented with vitamins C and E, challenged by Aeromonas hydrophila
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Data
2007-10-03
Autores
Garcia, Fabiana
Pilarski, Fabiana
Onaka, Eduardo Makoto
de Moraes, Flavio Ruas
Martins, Mauricio Laterca
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Piaractus mesopotamicus were fed diets supplemented with three vitamin C and/or E levels (zero, 250, and 500 mg vitamin/kg dry ration) and challenged with Aeromonas hydrophila. The fish were fed during the first 60 days with diets without vitamins C and E, in an attempt to reduce vitamin sources. After this period, test diets were offered during 60 days. At the end of the experiment, all fish were intraperitoneally injected with 6 x 10(6) Colony forming units (cfu) of A. hydrophila per fish. It was concluded that for pacu, vitamin C and E are essential for protection of erythrocytes. Vitamin C induces an increase in the number of circulating thrombocytes in a dose-response relation. However, just like vitamin deficiency should be avoided, excess vitamins can also cause damage to fish as observed in the hematocrit and hemoglobin values. Based on the hematological responses obtained, the recommended vitamin C and vitamin E levels for P mesopotamicus juveniles are 500 and 250 mg/kg feed, respectively. (C) 2007 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
Aeromonas hydrophila, challenge, Hematology, Piaractus mesopotamicus, Vitamin C, vitamin E
Como citar
Aquaculture. Amsterdam: Elsevier B.V., v. 271, n. 1-4, p. 39-46, 2007.