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Dietary lipid sources affect freshwater catfish jundiá, Rhamdia quelen, survival, when challenged with Aeromonas hydrophila - doi: 10.4025/actascianimsci.v35i4.19617 / Dietary lipid sources affect freshwater catfish jundiá, Rhamdia quelen, survival, when challenged with Aeromonas hydrophila - doi: 10.4025/actascianimsci.v35i4.19617

Javier Vargas, Rodrigo; Dotta, Geovana; Luiz Mouriño, José; Correia da Silva, Bruno; Machado Fracalossi, Débora.
Acta Sci. Anim. Sci.; 35(4): 349-355, 2013.
Artigo em Português | VETINDEX-Express | ID: vti-724815

Resumo

The immune modulatory activity of diet long chain polyunsaturated fatty acids in fish has been previously demonstrated, although results for freshwater species are controversial.  This study evaluates the effect of different dietary lipids on freshwater catfish jundiá, Rhamdia quelen, survival and its non-specific response (phagocytosis) after being inoculated with the pathogen  Aeromonas hydrophila. Five diets were offered to jundiá fingerlings during 150 days prior to challenge: cod liver oil (FO), sunflower oil (SO), linseed oil (LO), canola oil (CO) and coconut oil (CNO). Accumulated mortality was significantly lower in fish fed FO and CNO diets and higher in fish fed LO. In spite of the highest values observed for phagocytotic activity in CNO-fed fish (50.0 + 12.7%) and in FO-fed fish (45.0 + 10.5%) when compared to those fed other diets, no significant differences in phagocytosis were reported.  Results show the relevance of a balanced dietary lipid source with adequate concentrations of n-3 and n-6 series of fatty acids to prevent mortality after pathogen challenge.   
The immune modulatory activity of diet long chain polyunsaturated fatty acids in fish hasbeen previously demonstrated, although results for freshwater species are controversial. This studyevaluates the effect of different dietary lipids on freshwater catfish jundiá, Rhamdia quelen, survival and itsnon-specific response (phagocytosis) after being inoculated with the pathogen Aeromonas hydrophila. Fivediets were offered to jundiá fingerlings during 150 days prior to challenge: cod liver oil (FO), sunflower oil(SO), linseed oil (LO), canola oil (CO) and coconut oil (CNO). Accumulated mortality was significantlylower in fish fed FO and CNO diets and higher in fish fed LO. In spite of the highest values observed forphagocytotic activity in CNO-fed fish (50.0 + 12.7%) and in FO-fed fish (45.0 + 10.5%) when comparedto those fed other diets, no significant differences in phagocytosis were reported. Results show therelevance of a balanced dietary lipid source with adequate concentrations of n-3 and n-6 series of fatty acidsto prevent mortality after pathogen challenge.ent mortality after pathogen challenge
Biblioteca responsável: BR68.1