Abstract
Purchase PDF (408 K)
E-mail Article
Add to my Quick Links
Cited By in Scopus (0)
Purchase PDF (589 K)
doi:10.1016/j.cbpa.2007.01.004 
Copyright © 2007 Elsevier Inc. All rights reserved.
Effect of high levels of dietary vitamin C on the blood responses of matrinxã (Brycon amazonicus)
Elizabeth Gusmão Affonsoa, 
, 
, Elisângela da Costa Silvaa, Marcos Tavares-Diasb, Glauber Cruz de Menezesa, Cristiane Suely Melo de Carvalhoa, Érica da Silva Santiago Nunesa, Daniel Rebelo Ituassúa, Rodrigo Roubacha, Eduardo Akifumi Onoa, Jorge Daniel Indrusiak Fima and Jaydione Luiz Marconc
Received 23 September 2006;
References and further reading may be available for this article. To view references and further reading you must purchase this article.
Abstract
Juvenile matrinxã (Brycon amazonicus) were fed with different dietary vitamin C (ascorbic acid or AA) concentrations for 2 months in order to evaluate its effect on the physiological condition of this species. Five treatments were tested: Reference diet–RD (350 mg AA kg− 1 and 45% crude protein commercial feed); C400, C500, C600 and C800 with supplementation of 400, 500, 600 and 800 mg AA kg− 1. Fish fed 800 mg AA kg− 1 supplemented diets presented greater weight gain and survival. Hematocrit, hemoglobin concentrations and erythrocytes showed significant increase (p < 0.05) in C600 and C800 relatively to the others. Total leukocyte values were significantly higher in fish fed vitamin C supplemented diets relatively to those fed RD and leukocytes count of C600 and C800 were the highest among the treatments. Monocytes were the only cells of fish defense mechanism that presented variation, and C600 and C800 presented the lowest values (P < 0.05). Glucose level was significantly different relatively to RD only in C400 and the plasmatic total protein values for fish fed vitamin C supplemented diets were higher than for fish fed the RD. Fish plasmatic ions (Na+ and Cl−) were significantly lower for C500, C600 and C800 relatively to C400 and RD. The physiological profile and the growth performance of matrinxã suggest that diet supplemented with 800 mg AA kg− 1 can improve its performance and increase the survival rate.
Keywords: Ascorbic-acid; Blood; Culture; Leukocytes; Matrinxã
