Autochthonous yeasts as growth factor in Rhamdia quelen: preliminary approaches
Rhamdia quelen is an autochthonous fish used for aquaculture in the Northeast of Argentina. Antibiotics as growing factors in fish production had been criticized in the last years and the use of microorganisms emerged as a putative replacement. The aim of this study was to isolate autochthonous yeas...
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Universidad Nacional del Nordeste
2017
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| Acceso en línea: | https://revistas.unne.edu.ar/index.php/vet/article/view/1296 |
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I48-R154-article-12962025-02-12T21:57:26Z Autochthonous yeasts as growth factor in Rhamdia quelen: preliminary approaches Levaduras autóctonas como factores de crecimiento en Rhamdia quelen: primeras aproximaciones Guidoli, M. G. Mendoza, J. A. Cáceres, A. C. Boehringer, S. I. Sánchez, S. Pez Rhamdia quelen Candida tropicalis prebiótico acuicultura Rhamdia quelen is an autochthonous fish used for aquaculture in the Northeast of Argentina. Antibiotics as growing factors in fish production had been criticized in the last years and the use of microorganisms emerged as a putative replacement. The aim of this study was to isolate autochthonous yeasts from R. quelen and to evaluate the effect of the administration over biometrical parameters of larvae under intensive culture system. Fungi were isolated from the digestive tract of wild specimens, phenotypically identified and evaluated on their ability to exert beneficial properties. One selected fungal isolate was administered, four times a day, dead or alive at 1 or 2% together with balanced feed to R. quelen larvae for 15 days. aftertreatment larvae were counted and weighted in order to obtain the values of survival, mean weight and total biomass. Only four Candida tropicalis isolates were obtained. None of them expressed beneficial properties. One fungal isolate was randomly selected for in vivo assays. Results indicated that only dead yeast at 1% induced a significant increment of biomass when compared with the control group (p<0.05). Survival rate was boosted significantly (p<0.05) with dead yeast and not significantly (p>0.05) with the fungal isolate. None of the treatments induced significant increments in mean weight (p<0.05). These results allowed us to propose the treatment with dead yeast at 1% as a growing factor for R. quelen, considering this microorganism as an effective prebiotic in the aquaculture of this specie. Rhamdia quelen es un pez autóctono cultivado en el nordeste argentino. El uso de antibióticos como factores de crecimiento en acuicultura fue criticado en los últimos años y la administración de microorganismos surgió como una opción posible. El objetivo de este trabajo fue aislar levaduras autóctonas de R. quelen y evaluar el efecto de su administración sobre parámetros biométricos de larvas en cultivo intensivo. Los hongos se aislaron del tracto digestivo de especímenes de vida silvestre, se identificaron fenotípicamente y se evaluaron en cuanto a la expresión de propiedades benéficas. Se seleccionó una de las cepas y se administró cuatro veces por día, muerta o viva al 1 o 2% junto con el alimento balanceado durante 15 días. Luego del tratamiento las larvas se contaron y pesaron para obtener los valores de sobrevida, peso medio y biomasa. Sólo se obtuvieron cuatro aislamientos de Candida tropicalis. Ninguno expresó propiedades benéficas y uno fue elegido al azar para los ensayos in vivo. Solo la levadura muerta al 1% incrementó significativamente la biomasa en comparación con el control (p<0,05). La sobrevida mejoró significativamente (p<0,05) con la levadura muerta y sin significancia (p>0,05) con el hongo vivo. Ninguno de los tratamientos induce incrementos significativos del peso medio (p<0,05). Estos resultados nos permiten proponer al tratamiento con levadura muerta al 1% como un factor de crecimiento para R. quelen, considerando al microorganismo como un prebiótico efectivo para su uso en esta especie. Universidad Nacional del Nordeste 2017-06-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/1296 10.30972/vet.2811296 Revista Veterinaria; Vol. 28 Núm. 1 (2017); 37-40 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/1296/1074 Derechos de autor 2017 M. G. Guidoli, J. A. Mendoza, A. C. Cáceres, S. I. Boehringer, S. Sánchez https://creativecommons.org/licenses/by-nc/4.0 |
| institution |
Universidad Nacional del Nordeste |
| institution_str |
I-48 |
| repository_str |
R-154 |
| container_title_str |
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) |
| language |
Español |
| format |
Artículo revista |
| topic |
Pez Rhamdia quelen Candida tropicalis prebiótico acuicultura |
| spellingShingle |
Pez Rhamdia quelen Candida tropicalis prebiótico acuicultura Guidoli, M. G. Mendoza, J. A. Cáceres, A. C. Boehringer, S. I. Sánchez, S. Autochthonous yeasts as growth factor in Rhamdia quelen: preliminary approaches |
| topic_facet |
Pez Rhamdia quelen Candida tropicalis prebiótico acuicultura |
| author |
Guidoli, M. G. Mendoza, J. A. Cáceres, A. C. Boehringer, S. I. Sánchez, S. |
| author_facet |
Guidoli, M. G. Mendoza, J. A. Cáceres, A. C. Boehringer, S. I. Sánchez, S. |
| author_sort |
Guidoli, M. G. |
| title |
Autochthonous yeasts as growth factor in Rhamdia quelen: preliminary approaches |
| title_short |
Autochthonous yeasts as growth factor in Rhamdia quelen: preliminary approaches |
| title_full |
Autochthonous yeasts as growth factor in Rhamdia quelen: preliminary approaches |
| title_fullStr |
Autochthonous yeasts as growth factor in Rhamdia quelen: preliminary approaches |
| title_full_unstemmed |
Autochthonous yeasts as growth factor in Rhamdia quelen: preliminary approaches |
| title_sort |
autochthonous yeasts as growth factor in rhamdia quelen: preliminary approaches |
| description |
Rhamdia quelen is an autochthonous fish used for aquaculture in the Northeast of Argentina. Antibiotics as growing factors in fish production had been criticized in the last years and the use of microorganisms emerged as a putative replacement. The aim of this study was to isolate autochthonous yeasts from R. quelen and to evaluate the effect of the administration over biometrical parameters of larvae under intensive culture system. Fungi were isolated from the digestive tract of wild specimens, phenotypically identified and evaluated on their ability to exert beneficial properties. One selected fungal isolate was administered, four times a day, dead or alive at 1 or 2% together with balanced feed to R. quelen larvae for 15 days. aftertreatment larvae were counted and weighted in order to obtain the values of survival, mean weight and total biomass. Only four Candida tropicalis isolates were obtained. None of them expressed beneficial properties. One fungal isolate was randomly selected for in vivo assays. Results indicated that only dead yeast at 1% induced a significant increment of biomass when compared with the control group (p<0.05). Survival rate was boosted significantly (p<0.05) with dead yeast and not significantly (p>0.05) with the fungal isolate. None of the treatments induced significant increments in mean weight (p<0.05). These results allowed us to propose the treatment with dead yeast at 1% as a growing factor for R. quelen, considering this microorganism as an effective prebiotic in the aquaculture of this specie. |
| publisher |
Universidad Nacional del Nordeste |
| publishDate |
2017 |
| url |
https://revistas.unne.edu.ar/index.php/vet/article/view/1296 |
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