Curcuma longa supplementation in the diet of Astyanax aff. bimaculatus in preparation for transport |
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| Authors: | Pollyanna de Moraes França Ferreira Juliana Silva Rocha Juliana Rodrigues Gomes Débora Werneck Caldas Maria Tatiana Soares Martins Jerusa Maria de Oliveira Ana Lucia Salaro Jener Alexandre Sampaio Zuanon |
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| Affiliation: | 1. Departamento de Biologia Geral, Universidade Federal de Vi?osa – UFV, Vi?osa, MG, Brazil;2. Departamento de Biologia Animal, Universidade Federal de Vi?osa – UFV, Vi?osa, MG, Brazil |
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| Abstract: | The physiological state of fish before transportation is an important aspect to be observed when reduction in losses due to mortality is aimed. Various preparative procedures for transport are reported, but little is known about the use of additives in fish diet. In this study, we aimed to evaluate the effect of dietary turmeric (Curcuma longa) supplementation on the tolerance of juvenile Astyanax aff. bimaculatus to transportation stress. The experimental design consisted of six treatments: 0, 20, 40, 60, 80 and 100.0 g kg?1 turmeric. Fish weighing 0.83 ± 0.04 g were distributed in 24 80‐L aquaria at a density of 0.5 fish L?1 and were fed to satiation three times a day for 60 days. After this period, fish were transported for 24 h in plastic bags (15 fish per bag). Using a discontinuous linear response plateau (LRP) model, the lowest estimated concentration of turmeric that maximized the survival rate was 16.67 g kg?1. Quadratic effects of turmeric on blood lactate levels were observed, and the estimated concentration of turmeric required to minimize blood lactate levels was 64.7 g kg?1. We observed quadratic effects of turmeric on superoxide dismutase activity and the concentration of malondialdehyde in fish gills and the turmeric concentrations required to minimize the transport stress effects on these variables were 42.50 and 83.33 g kg?1, respectively. Thus, dietary supplementation with turmeric enhanced the tolerance of juvenile A. aff. bimaculatus to transportation stress. |
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| Keywords: | curcumin oxidative stress plant extracts turmeric yellow tail tetra |
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