Influence of type of diet on the fat constituents of goat and sheep milk

Sampelayo, M.R. Sanz; Chilliard, Yves; Schmidely, Philippe; Bozá, J.

doi:10.1016/j.smallrumres.2006.09.017

Cited by 224 publications

(198 citation statements)

References 94 publications

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“…significant differences in the productive performance of dairy goats fed FO (Cattaneo et al, 2006;Sanz Sampelayo et al, 2007). Our analysis of plasma metabolite levels showed a similar trend in the two experimental groups, confirming that the type of dietary fat did not affect periparturient metabolic response in the goats.…”

Section: Discussionsupporting

confidence: 77%

“…Over the past decades the use of fat-supplements for increasing the energy content of the diet has been extensively examined in dairy goats by several authors (Baldi et al, 1992;Schmidely and Sauvant, 2001;Chilliard et al, 2003;Cattaneo et al, 2006;Sanz Sampelayo et al, 2007). Recently has the impact of dietary FO supplementation been investigated on immune response as a source of EPA and DHA with interesting results Agazzi et al, 2004;Pisani et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…Among FAs, n-3 and n-6 polyunsaturated fatty acids (PUFAs) are rich in fish oil (FO) and have been shown to influence productive performance in dairy goats (Sanz Sampelayo et al, 2007), although results from dairy cows predicted that higher content of long-chain highly unsaturated FA in the diet would decrease intake relative to saturated FA (Harvatine and Allen, 2005). Milk characteristics and milk FA profile are reported to be influenced by the administration of FO rich in n-3 PUFAs as well as increased levels of eicosapentaenoic acid (C20:5) and docosahexaenoic acid (C22:6) (Cattaneo et al, 2006), which play a critical role in the modulation of immune reactions .…”

Section: Introductionmentioning

confidence: 99%

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Effects of protected fish oil in the diet of periparturient dairy goats on phenotypic variation in blood and milk leukocytes

Bronzo

Puricelli

Agazzi

et al. 2010

Animal

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The goal of this study was to evaluate the effects of dietary protected fish oil (FO) on phenotypic variation in blood, milk leukocytes, and some productive and metabolic parameters in periparturient dairy goats. About 12 Alpine goats, selected from a larger group of second-parity animals, were fed from 15 days before kidding until the 15th day of lactation with the same basal diet that had been supplemented with either 47 g/head per day of FO or 47 g/head per day hydrogenated palm oil (PO). Dry matter intake, live body weight (LBW), body condition score (BCS), and productive performance were evaluated in 2 weeks after kidding. On days 15, 7, and 2 before kidding and days 2, 7, and 15 after kidding, plasma samples were collected for evaluation of alanine aminotransferase, aspartate aminotransferase, non-esterified fatty acids, glucose, beta-hydroxybutyrate, cholesterol, and urea levels. White blood cell and blood leukocyte subsets were counted in whole blood samples on the kidding day, as well as at 1, 4, and 15 days after kidding. In addition, milk somatic cell count, intramammary infection (IMI), and milk leukocyte subsets were evaluated on days 4 and 15 after kidding. No differences were observed in dry matter intake and BCS, while LBW was higher in FO-fed animals. Milk production and composition, plasma metabolites, and liver enzymes were similar in both experimental groups. Blood CD4 positive cells increased constantly ( P 5 0.05) in FO-fed group, while CD8 and CD14 cell counts significantly increased 4 days after kidding ( P , 0.01). Milk leukocyte subsets showed a significant ( P , 0.01) decrease in PO-fed group and a nonsignificant increase ( P 5 0.34) in FO-fed group, despite the presence of coagulase negative staphylococci IMI. The results of the productive performance evaluation agreed with those of many other studies, which did not find any significant differences between dairy goats fed diets enriched with FO or PO supplements. The administration of FO to dairy goats in transition appeared to affect the variation in blood leukocytes with a constant increase in CD4-and CD8-positive cells in comparison with a PO fat-supplemented diet.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of protected fish oil in the diet of periparturient dairy goats on phenotypic variation in blood and milk leukocytes

Bronzo

Puricelli

Agazzi

et al. 2010

Animal

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“…Consequently, the effect that ewe nourishment has on the performance and FA composition of their suckling offspring is of great interest to researchers. In the last few years, some studies have been published investigating the FA content of goat meat (Sanz Sampelayo et al, 2007;Nudda et al, 2008), but similar papers on sheep have been rare, and have generally focused more on lamb performance (Appeddu et al, 2004) than the chemical composition of their meat (Serra et al, 2009). Despite numerical differences, we observed that LIN slightly decreases milk yield compared with SOY.…”

Section: Discussionmentioning

confidence: 54%

Feeding vegetable oils to lactating ewes modifies the fatty acid profile of suckling lambs

Manso

Bodas

Vieira

et al. 2011

Animal

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The objective of this study was to evaluate the effects of vegetable oil supplementation of ewe diets on the performance and fatty acid (FA) composition of their suckling lambs. Forty-eight pregnant Churra ewes (mean BW 64.3 6 0.92 kg) with their 72 newborn lambs (prolificacy 5 1.5) were assigned to one of four experimental diets, supplemented with 3% of hydrogenated palm (PALM), olive (OLI), soya (SOY) or linseed (LIN) oil. Lambs were nourished exclusively by suckling from their respective mothers. Ewes were milked once daily, and milk samples were taken once a week. When lambs reached 11 kg, they were slaughtered and samples were taken from musculus longissimus dorsi (intramuscular fat) and subcutaneous fat tissue. No changes were observed in milk yield, proximal composition or lamb performance (P . 0.10). Milk and lamb subcutaneous and intramuscular fat samples from the PALM diet had the highest saturated fatty acid concentration, whereas those of the OLI, SOY and LIN diets had the lowest (P , 0.05). The greatest monounsaturated fatty acid concentration was observed in milk from ewes fed OLI, and the least in milk and in lamb subcutaneous and intramuscular fat samples from LIN and PALM diets. Milk and lamb fat from ewes fed PALM displayed the highest 16:0 proportion and the lowest 18:0 (P , 0.05). There were higher concentrations of cis-9 18:1 in OLI samples (P , 0.05), more 18:2n-6 in SOY lambs and milk fat (P , 0.001) and the highest levels of 18:3n-3 and 20:5n-3 in LIN samples (P , 0.01). Milk and lamb subcutaneous and intramuscular samples from SOY and LIN diets contained the most cis-9, trans-11 conjugated linoleic acid, whereas PALM samples had the least (P , 0.01). Sheep diet supplementation with different oils, constituting up to 3% of their diets, resulted in changes in the FA composition of milk and the subcutaneous and intramuscular fat of suckling lambs, but did not affect either milk production or lamb performance.

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“…Compared with milk from faba bean and pea, those from chickpea concentrate and MCF were lower in most short-and linear medium-chain FA (from C9:0 to C17:0) (Table 4), which are entirely (linear even-chain FA from C6:0 to C14:0) o partly (linear odd-chain FA and C16:0) synthesised de novo within the mammary gland. Whereas the even-chain saturated FA (SFA) from C6:0 to C10:0 are of interest for human health, being used in the treatment of metabolic illness (Sanz Sampelayo et al 2007), those from C12:0 to C16:0 are known for their hypercholesterolaemic effect, by increasing low density lipoprotein cholesterol (Ohlsson 2010).…”

Section: Milk Fatty Acid Compositionmentioning

confidence: 99%

Legume grain-based supplements in dairy sheep diet: effects on milk yield, composition and fatty acid profile

et al. 2016

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Abstract. With the aim to find protein sources that are free of genetically modified organisms, the effects of legume grainbased concentrates, used as alternatives of a mixed concentrate feed containing soybean, were evaluated on sheep milk production. Twelve lactating ewes were divided into four groups, fed hay and, according to a 4 · 4 Latin square design, supplied with 800 g/day of a commercial mixed concentrate feed (MCF) containing maize and soybean, or the same amount of isoprotein concentrates consisting of chickpea (CH), faba bean (FB), or pea (PE) mixed with barley. The ewes ingested more of the concentrates with legume grains than the MCF (702, 702, 678 vs 587 g/day DM for CH, FB, PE and MCF; P 0.001). Compared with CH, FB and PE resulted in greater (P 0.05) milk yield (710, 718 vs 654 g/day for FB, PE and CH, respectively), and led to a greater (P 0.05) efficiency of dietary protein utilisation for milk casein synthesis (94, 97 vs 87 g casein/kg crude protein intake for FB, PE and CH, respectively), whereas MCF resulted in intermediate levels of milk yield (677 g/day) and milk casein/crude protein intake (88 g/kg). Chickpea increased the milk content of trans-vaccenic and rumenic acids in comparison with FB and PE and, similarly to MCF, increased the milk content of linoleic acid, as well as total unsaturated fatty acids (24.3, 23.9 vs 17.2, 16.8 g/100 g fatty acid methyl esters for MCF, CH, FB and PE; P 0.001), thereby improving the potential health-promoting index. Legume grains can replace soybean in diets of dairy ewes, as they do not adversely affect milk yield and composition.

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Influence of type of diet on the fat constituents of goat and sheep milk

Cited by 224 publications

References 94 publications

Effects of protected fish oil in the diet of periparturient dairy goats on phenotypic variation in blood and milk leukocytes

Effects of protected fish oil in the diet of periparturient dairy goats on phenotypic variation in blood and milk leukocytes

Feeding vegetable oils to lactating ewes modifies the fatty acid profile of suckling lambs

Legume grain-based supplements in dairy sheep diet: effects on milk yield, composition and fatty acid profile

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