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Effects of the probiotic Bacillus amyloliquefaciens on growth performance, hematology and intestinal morphometry in cage-reared Nile tilapia/Efectos del probiotico Bacillus amyloliquefaciens en el crecimiento, hematologia y morfometria intestinal en tilapias del Nilo criadas en balsa jaula
The aim of this study was to evaluate the effect of probiotic Bacillus amyloliquefaciens on the growth performance, blood profile and intestinal morphometry in Nile tilapia (Oreochromis niloticus) reared in cages. 936 Nile tilapias were distributed in 12 cages (1.5 [m.sup.3]). Fish were fed for 90 d...
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Published in: | Latin american journal of aquatic research 2015-11, Vol.43 (5), p.963 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | Spanish |
Online Access: | Get full text |
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Summary: | The aim of this study was to evaluate the effect of probiotic Bacillus amyloliquefaciens on the growth performance, blood profile and intestinal morphometry in Nile tilapia (Oreochromis niloticus) reared in cages. 936 Nile tilapias were distributed in 12 cages (1.5 [m.sup.3]). Fish were fed for 90 days on basal diets containing 0 (control); 1x[10.sup.6] CFU [g.sup.-1]; 5x[10.sup.6] CFU [g.sup.-1]; and 1x[10.sup.7] CFU [g.sup.-1] of the probiotic. The results showed no significant difference on performance and proximal composition of fish. Blood glucose and hemoglobin were lower in 1x[10.sup.7] CFU [g.sup.-1] group, suggesting improves of the homeostatic state of the fish. Other hematimetric indices did not differ between groups. It was observed significant increase of villi height and in the number of goblet cells of the intestine in fish supplemented 5x[10.sup.6] CFU [g.sup.-1] and 1x[10.sup.7] CFU [g.sup.-1] of food suggesting that fish improved the digestion and absorption of nutrients. However, more studies are needed to determine the efficacy of this probiotic in field conditions in Nile tilapia. Keywords: Oreochromis niloticus, homeostatic state, intestinal morphology, blood glucose, aquaculture. El objetivo de este estudio fue evaluar el efecto del probiotico Bacillus amyloliquefaciens en el desempeno del crecimiento, hemograma y morfometria intestinal en tilapia del Nilo (Oreochromis niloticus) criadas en balsas jaulas. 936 tilapias del Nilo se distribuyeron en 12 balsas jaulas (1,5 [m.sup.3]). Los peces fueron alimentados durante 90 dias con dietas que contenian 0 (control); 1x[10.sup.6] UFC [g.sup.-1]; 5x[10.sup.6] UFC [g.sup.-1] y 1x[10.sup.7] UFC [g.sup.-1] del probiotico. Los resultados no mostraron diferencias significativas en el rendimiento y composicion proximal de los peces. La glucosa en sangre y hemoglobina fue menor en el grupo 1x[10.sup.7] UFC [g.sup.-1], lo que sugiere un mejor estado homeostatico de los peces. Otros parametros hematimetricos no difirieron entre los grupos. Se observo aumento significativo de la altura de las vellosidades y numero de celulas caliciformes del intestino en los peces suplementados con 5x[10.sup.6] UFC [g.sup.-1] y 1x[10.sup.7] UFC [g.sup.-1] de alimento que sugieren que los peces mejoraron la digestion y absorcion de nutrientes. Sin embargo, se necesitan mas estudios para determinar la eficacia de este probiotico en condiciones de campo en tilapia del Nilo. Palabras clave: Oreochromis niloticus, homeost |
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ISSN: | 0718-560X 0718-560X |
DOI: | 10.3856/vol43-issue5-fulltext-16 |