Effects of anEnterococcus faecium‐based probiotic on growth performance and health of Pirarucu,Arapaima gigas
| Autor: | Paulo César Falanghe Carneiro, Carlos Alberto Martins Cordeiro, J.L.P. Mouriño, Márcia Valéria Silva do Couto, Gabriel Fernandes Alves Jesus, Alexandre Nizio Maria, Jonathan Stuart Ready, Maurício Laterça Martins, Peterson Emmanuel Guimarães Paixão, Natalino da Costa Sousa, Emilly Monteiro Lopes, Higo Andrade Abe, Rodrigo Yudi Fujimoto |
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| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
Trichodina biology ved/biology Fish farming ved/biology.organism_classification_rank.species 04 agricultural and veterinary sciences Aquatic Science Gut flora biology.organism_classification Feed conversion ratio law.invention 03 medical and health sciences Probiotic Animal science law Arapaima 040102 fisheries 0401 agriculture forestry and fisheries Arapaima gigas 030304 developmental biology Enterococcus faecium |
| Zdroj: | Aquaculture Research. 50:3720-3728 |
| ISSN: | 1365-2109 1355-557X |
| Popis: | Intensive fish farming has resulted in an increased concern for disease outbreaks. Probiotic use is one of the strategies being developed to improve fish health and productivity. Measures of probiotic colonization, growth performance, haematological characteristics and parasite load were used to evaluate the effect of diets supplemented with Enterococcus faecium on growth and health of Arapaima gigas juveniles. A completely randomized design with four treatments (diet with E. faecium at 1 × 10⁶ CFU/g and 1 × 10⁸ CFU/g, control diet and diet with the culture medium MRS) and three replicates was used. Ninety‐six Arapaima juveniles were distributed in 12 cages fed with the specified diet for 68 days. Colonization of the intestinal tract by lactic acid bacteria reduced the total number of heterotrophic bacteria in fish fed with probiotics compared to controls. Fish fed a supplemented diet containing 1 × 10⁸ CFU/g presented higher values of weight gain, survival and fish growth uniformity, and lower values of feed conversion ratio. The prevalence of Trichodina sp. could have affected the survival of fish in the control group. Reduction in parasite load and an increase in haematocrit, the number of erythrocytes, thrombocytes, neutrophils and monocytes were also observed in fish fed the diet containing 1 × 10⁸ CFU/g. Enterococcus faecium presented a probiotic effect in A. gigas juveniles and can be recommended for use at a concentration of 1 × 10⁸ CFU/g to modify the gut microbiota, improve growth performance and haematology and reduce parasitic load. |
| Databáze: | OpenAIRE |
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