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Effect of olive and fish oil calcium soaps fed to early lactating ewes on milk performance and fatty acid profile

AuthorsGallardo, B.; Gómez-Cortés, Pilar ; Mantecón, Ángel R. ; Juárez, Manuela ; Fuente, Miguel Ángel de la ; Manso, Teresa
Issue Date2013
PublisherEuropean Association for Animal Production
CitationEAAP 2013
AbstractThe objective of this study was to evaluate the effects of different calcium soaps of fatty acids (CSFA) fed to early lactating ewes on milk performance and fatty acid (FA) profile. After lambing, thirty-six Churra ewes were fed daily 2.1 kg of a TMR containing lucerne and concentrate at a 40:60 ratio. Each ewe was assigned to one of the three dietary treatments, which received 3% (as-fed basis) of the corresponding CSFA: CSFA of palm oil (CTL), CSFA of olive oil (OLI, Olifat) and CSFA of fish oil (FO, StrataG). Milk yield and composition were recorded weekly during the first month of lactation. Data were evaluated by the MIXED procedure of SAS. Regardless the type of CSFA, milk yield and milk protein percentage were not different (P > 0.05), but OLI and FO diet decreased milk fat content (P < 0.01). Milk samples from FO had the lowest content of monounsaturated FA (P < 0.01) and the greatest content of polyunsaturated FA (PUFA) (P < 0.001). OLI and FO treatments caused an increase of 2-fold and 8-fold in trans-11 C18:1 and 2-fold and 6-fold in cis-9, trans-11 C18:2 in milk fat compared to the control diet respectively. Although there were no differences in trans-10, cis-12 C18:2, OLI and FO enhanced the content of trans-10 C18:1 (P < 0.05). FO treatment caused an increase of 4-fold in n-3 PUFA in milk fat compared with the other two treatments (P < 0.001), mainly C20:5, C22:5 and C22:6 while no differences (P > 0.05) were observed between CTL and OLI. In conclusion, supplementing ewes’ diet with CSFA of olive oil or fish oil could be a promising way to improve milk FA composition from a human health point of view, however fish oil CSFA would reduce the milk fat percentage.
DescriptionTrabajo presentado al 64th Annual Meeting of the European Federation of Animal Science (EAAP) celebrado en Nantes (Francia) del 26 al 30 de agosto de 2013.
Publisher version (URL)https://www.eaap2013.org/
Appears in Collections:(CIAL) Comunicaciones congresos
(IGM) Comunicaciones congresos
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