Ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils
2 pages, 2 tables.--Contributed to: XIth International Symposium on Ruminant Physiology. (Clermont-Férrand (Francia), Sep 6-9, 2008).
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2009-09
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dig-igm-es-10261-171972021-03-18T16:13:21Z Ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils Toral, Pablo G. Hervás, Gonzalo Shingfield, Kevin J. Toivonen, V. Belenguer, Álvaro 2 pages, 2 tables.--Contributed to: XIth International Symposium on Ruminant Physiology. (Clermont-Férrand (Francia), Sep 6-9, 2008). Fish oil (FO) in the diet alters milk fatty acid (FA) composition, enhances milk fat conjugated linoleic acid content (CLA), and also induces milk fat depression (MFD) in lactating cows (Loor et al., 2005). Even though ewes appear less prone to MFD, there is some evidence that supplementing high-concentrate diets with 10 g FO and 20 g sunflower oil (SO)/kg resulted in transient increases of milk fat content (+12%) after 3 d of supplementation, followed by a sustained decrease (up to -27%; Toral et al., unpublished). Under these circumstances, MFD in ewes was not explained by an increase in milk fat t10 c12-CLA concentration. Changes in milk FA composition were characterized by a severe reduction in 18:0 together with an increase in trans-18:1 content. Furthermore, the addition of SO and FO decreased DM intake (-19%) and reduced milk yield (-14%) which may indicate a negative impact of lipid supplements on ruminal fermentation in sheep fed high-concentrate diets. The current experiment was therefore designed to examine the effect of a mixture of SO and FO in the diet on ruminal FA profile and fermentation characteristics in ewes. This work was supported by Projects AGL2008-04805-C02-02 (MICINN) and CSI01B08 (Council of Castille and Leon). Peer reviewed 2009-09-28T08:50:40Z 2009-09-28T08:50:40Z 2009-09 comunicación de congreso http://purl.org/coar/resource_type/c_5794 Proceedings of the XIth International Symposium on Ruminant Physiology, p. 374-375 (2009) Ruminant physiology, Digestion, Metabolism, and effects of nutrition on reproduction and welfare 374-375 (2009) 978-90-8686-119-4 http://hdl.handle.net/10261/17197 en http://www.wageningenacademic.com/default.asp?sg={091004C3-5D9B-4B66-B409-8914910A63B6}&pageid=53&docid=16&artdetail=Ruminant09&webgroupfilter=950&sg={091004C3-5D9B-4B66-B409-8914910A63B6} open 24730 bytes application/pdf Wageningen Academic Publishers |
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2 pages, 2 tables.--Contributed to: XIth International Symposium on Ruminant Physiology. (Clermont-Férrand (Francia), Sep 6-9, 2008). |
| format |
comunicación de congreso |
| author |
Toral, Pablo G. Hervás, Gonzalo Shingfield, Kevin J. Toivonen, V. Belenguer, Álvaro |
| spellingShingle |
Toral, Pablo G. Hervás, Gonzalo Shingfield, Kevin J. Toivonen, V. Belenguer, Álvaro Ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils |
| author_facet |
Toral, Pablo G. Hervás, Gonzalo Shingfield, Kevin J. Toivonen, V. Belenguer, Álvaro |
| author_sort |
Toral, Pablo G. |
| title |
Ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils |
| title_short |
Ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils |
| title_full |
Ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils |
| title_fullStr |
Ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils |
| title_full_unstemmed |
Ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils |
| title_sort |
ruminal fatty acid profile and fermentation characteristics in ewes fed sunflower and fish oils |
| publisher |
Wageningen Academic Publishers |
| publishDate |
2009-09 |
| url |
http://hdl.handle.net/10261/17197 |
| work_keys_str_mv |
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