Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/63946
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Milk fat depression induced by dietary marine algae in dairy ewes: Persistency of milk fatty acid composition and animal performance responses |
Autor: | Bichi, Elena CSIC; Hervás, Gonzalo CSIC ORCID ; Toral, Pablo G. CSIC ORCID ; Loor, Juan J.; Frutos, Pilar CSIC ORCID | Palabras clave: | Conjugated linoleic acids Lipid supplementation Sheep Trans fatty acid |
Fecha de publicación: | 2013 | Editor: | American Dairy Science Association | Citación: | Journal of Dairy Science 96: 524-532 (2013) | Resumen: | Addition of marine algae (MA) to the diet of dairy ruminants has proven to be an effective strategy to enhance the milk content of some bioactive lipids, but it has also been associated with the syndrome of milk fat depression. Little is known, however, about the persistency of the response to dietary MA in sheep. Based on previous experiments with dairy ewes fed sunflower oil plus MA, it was hypothesized that the response might be mediated by time-dependent adaptations of the rumen microbiota, which could be evaluated indirectly through milk fatty acid (FA) profiles. Animal performance and milk FA composition in response to MA in the diet were studied using 36 Assaf ewes distributed in 6 lots and allocated to 2 treatments (3 lots/ treatment) consisting of a total mixed ration (40:60 forage:concentrate ratio) supplemented with 25 g of sunflower oil (SO)/kg of dry matter plus 0 (SO; control diet) or 8 g of MA/kg of dry matter (SOMA diet). Milk production and composition, including FA profile, were analyzed on d 0, 6, 12, 18, 24, 34, 44, and 54 of treatment. Diet supplementation with MA did not affect milk yield but did decrease milk fat content. Differences in the latter were detected from d 18 onward and reached −17% at the end of the experiment (i.e., on d 54). Compared with the control diet, the SOMA diet caused a reduction in milk 18:0 and its desaturation product (cis-9 18:1) that lasted for the whole experimental period. This decrease, together with the progressive increase in some putative fat synthesis inhibitors, especially trans-10 18:1, was related to the persistency of milk fat depression in lactating ewes fed MA. Additionally, inclusion of MA in the diet enhanced the milk content of trans-11 18:1, cis-9,trans-11 18:2, and C20–22 n-3 polyunsaturated FA, mainly 22:6 n-3. Overall, the persistency of the responses observed suggests that the ruminal microbiota did not adapt to the dietary supply of very long chain n-3 polyunsaturated fatty acids. | Descripción: | 9 páginas, 3 tablas, 1 figura. | Versión del editor: | http://dx.doi.org/10.3168/jds.2012-5875 | URI: | http://hdl.handle.net/10261/63946 | DOI: | 10.3168/jds.2012-5875 | ISSN: | 0022-0302 |
Aparece en las colecciones: | (IGM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Embargo. Digital.CSIC..pdf | 21,67 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
80
checked on 03-abr-2024
WEB OF SCIENCETM
Citations
72
checked on 24-feb-2024
Page view(s)
391
checked on 19-abr-2024
Download(s)
224
checked on 19-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.