Dietary supplementation with autochthonous Bacillus cereus improves growth performance and survival in tambaqui Colossoma macropomum |
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| Authors: | Joel A R Dias Higo A Abe Natalino C Sousa Márcia V S Couto Carlos A M Cordeiro Juliana O Meneses Fernanda S Cunha Jose Luiz P Mouriño Mauricio L Martins Luís A L Barbas Paulo C F Carneiro Alexandre N Maria Rodrigo Y Fujimoto |
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| Affiliation: | 1. Federal University of Pará (UFPA), Castanhal, PA, Brazil;2. Tiradentes University (UNIT), Farolandia, Aracaju, SE, Brazil;3. Aquatic Organisms Health Laboratory (AQUOS), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil;4. Tropical Species Aquaculture Laboratory (LAET), Federal Institute of Education, Science and Technology of Pará (IFPA–Castanhal), Castanhal, PA, Brazil;5. Brazilian Agricultural Research Corporation – EMBRAPA Tabuleiros Costeiros, Aracaju, SE, Brazil |
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| Abstract: | The aim of this study was to evaluate the effect of dietary supplementation with the autochthonous probiotic bacteria Bacillus cereus on growth performance, haematological parameters and survival of tambaqui (Colossoma macropomum). Tambaqui fingerlings (0.94 ± 0.02 g) were fed for 120 days the following diets: basal (without probiotic) and three supplemented diets (4.2 × 104, 3.9 × 106 and 3.3 × 108 CFU/g). Growth performance and haematological parameters were evaluated every 30 days. Thereafter, fish were challenged against Aeromonas hydrophila and survival was evaluated. Probiotic B. cereus improved weight and length gains (p < 0.05), and increased neutrophils and thrombocyte counts (p < 0.05) in tambaqui supplemented with 3.9 × 106 CFU/g diet. Challenged fish fed unsupplemented diet presented the lowest survival rate (33.4%) while fish fed diets supplemented at 4.2 × 104, 3.9 × 106 and 3.3 × 108 CFU/g B. cereus had 88.8%, 80.5% and 80.5% relative per cent survival respectively. These results demonstrated that B. cereus supplemented as probiotics to C. macropomum for 120 days improved physiological and haematological responses, leading to enhanced survival in this fish species. |
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| Keywords: | amazon bacterium fish haematology nutrition performance |
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