Quality and fatty acid profile of the milk of indigenous goats subjected to different local diets in Tunisian arid lands

Ayeb, Naziha; Addis, Margherita; Fiori, Myriam; Khorchani, Soufiene; Atigui, Moufida; Khorchani, Touhami

doi:10.1111/jpn.12344

Cited by 18 publications

(34 citation statements)

References 40 publications

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“…The calculated values for the milk FA groups, ω-6/ω-3 ratio, and atherogenicity index are shown in Table 2. Milk FA groups during all weeks of the suckling and milking periods decreased in the order of SFA>MUFA>PUFA, which is in agreement with other studies in sheep (Mierlita et al, 2011a,b;Sinanoglou et al, 2015) and goats (Ayeb et al, 2015;Kuchtík et al, 2015). There were no differences in milk fat composition, in either SFA or in UFA groups during the suckling and milking periods.…”

Section: Resultssupporting

confidence: 81%

“…Generally, the average vaccenic acid values during suckling and milking periods were 0.94 and 1.21%, respectively. These values in Najdi milk fat were lower than those reported by several studies on sheep (3.6-7%) (Bouattour et al, 2007;Mierlita et al, 2011a b) and dromedary camel (2.8%) (Ayadi & Casals, 2009), but were comparable with those mentioned for Tunisian goats (0.61%) (Ayeb et al, 2015) and cows (1.4-1.8%) (Ellis et al, 2006;Wang et al, 2013). The α-linolenic acid (C18:39c,12c,15c), which is a member of the ω-3 FA group, is primarily of dietary origin, and its concentration in milk depends on its amount in the rumen (De La Fuente et al, 2009).…”

Section: Resultscontrasting

confidence: 48%

“…Among the FAs found in milk, UFA, namely vaccenic acid (cis9, trans11-18:2), rumenic acid (trans 11-18:1), omega-3 (ω-3) FA group, and CLA isomers, are considered beneficial to human health (Ellis et al, 2006). The FA composition of milk depends on both the consumed dietary FAs and the biohydrogenation activities in the rumen (Ayeb et al, 2015;Sinanoglou et al, 2015). Several studies have demonstrated that breed and dietary regime play pivotal roles in modulating the milk FA composition (Signorelli et al, 2008;De La Fuente et al, 2009;Mierlita et al, 2011a).…”

Section: Introductionmentioning

confidence: 99%

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Changes in the composition and fatty acid profile of Najdi ewes’ milk before and after weaning

Matar¹,

Ayadi²,

Aljumaah³

et al. 2017

SA J. An. Sci.

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This trial aimed to study the changes in the yield, composition, and fatty acid (FA) profile of ewes' milk during suckling and milking periods. Nineteen multiparous Najdi ewes were kept under identical management and feeding conditions during a 12-week trial that was divided into two periods. Milk samples were collected on each sampling day from the total yield during the suckling (3rd, 6th, and 9th week) and milking (12th week) periods. The milk yield and the total solids, fat, protein, and lactose contents of the milk remained constant throughout the suckling weeks, but the protein content increased and milk yield and lactose content decreased after weaning. There were no differences in milk saturated FA (SFA), unsaturated FA (UFA), and monounsaturated FA (MUFA) contents during the suckling and milking periods, whereas the polyunsaturated FA content increased during the milking period. There were no differences in the individual milk SFA during the weeks of suckling, but the contents of caproic acid (C6:0), caprylic acid (C8:0), margaric acid (C17:0), and stearic acid (C18:0) decreased. However, myristic acid (C14:0), lauric acid (C12:0), and isomers of pentadecanoic (C15:0) acid increased during the milking period. The percentage of vaccenic acid (C18:111t), rumenic acid (C18:29c,11t; conjugated linoleic acid (CLA)), ω-3 FA group, and the atherogenicity index did not differ during the suckling period, but increased after weaning in the 12th week of lactation. This study demonstrated that weaning lambs in Najdi ewes is probably a factor that strongly affects milk traits by changing yield, composition, and FA profile.

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Section: Resultssupporting

confidence: 81%

Section: Resultscontrasting

confidence: 48%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Changes in the composition and fatty acid profile of Najdi ewes’ milk before and after weaning

Matar¹,

Ayadi²,

Aljumaah³

et al. 2017

SA J. An. Sci.

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“…For lactose milk content, no differences were observed (P > 0.05) among the treatments; Luna et al (2008) reported differences in goat milk when the diets were supplemented with whole linseed (1.84%) and sunflower oil (0.81%) compared with the control diet. Ayeb et al (2016) found no differences in the lactose content of goat milk with the inclusion of dry olive leaves in the diet. The TS in the diet were similar (P > 0.05) among treatments (12 ± 0.12 g/100); Ayeb et al (2016) observed an increase of the TS when dry olive leaves were included in the diet.…”

Section: Production and Chemical Composition Of Milkmentioning

confidence: 77%

Fatty acid profile of goat milk in diets supplemented with chia seed (Salvia hispanica L.)

Schettino

Vega

Gutiérrez

et al. 2017

Journal of Dairy Science

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Chia seed (Salvia hispanica L.) is the greatest known plant source of n-3 α-linolenic acid. The present study evaluated the effects of 3 inclusion levels of chia seed [zero (control); low, 2.7% (CLow); and high, 5.5% (CHigh)] in diets of dairy goats on milk yield and fatty acid profile. Nine Saanen dairy goats in the last third of lactation period, live weight 38 ± 8.7 kg, housed in metabolic cages, were fed iso-proteic and iso-energetic (160 g of crude protein/d and 11 MJ of metabolizable energy/d) diets. Gas chromatography was used to analyze fatty acid profile and total conjugated linoleic acid (CLA). Silver ion HPLC was used to analyze the isomeric profile of CLA. The results were subjected to variance analysis using a Latin square design repeated 3 × 3. The CHigh treatment was higher for dry matter, neutral detergent fiber, and acid detergent fiber intake compared with CLow and control diets. Digestibility was not affected by the inclusion of chia seeds. The CHigh diet improved N intake with respect to the control and CLow diet. Milk yield and chemical composition were not affected by the treatment. The milk fatty acid profile of C18:0, C18:1, C18:2, and C:20 was higher for CHigh than the other treatments. The in vitro gas production (mL of gas/g of dry matter) was lower in CHigh than the control diet. In conclusion, the addition of chia seeds at the CHigh level in dairy goat diets negatively affected in vitro rumen fermentation, but increased the milk fatty acid profile of C18:0, C18:1n-9 cis, and C:20, monounsaturated fatty acids, and polyunsaturated fatty acids. The total CLA content increased from 0.33 to 0.73% with the supplementation of chia to the diet, as well as the isomers cis-9,trans-11, trans-7,cis-9, trans-11,cis-13, and trans-12,trans-14.

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“…For lactose content in milk, no differences were observed among treatments ( p > 0.05); however, Luna et al [ 49 ] reported differences in goat milk lactose when the diets were supplemented with whole linseed (1.84% DM) and sunflower oil (0.81% DM). Ayeb et al [ 50 ] found no differences in the lactose content of goat milk when animals were fed dry olive leaves ad libitum. These authors reported an increase of the total solids when dry olive leaves were included in the diet.…”

Section: Resultsmentioning

confidence: 99%

Effects of Calcium Soaps from Palm, Canola and Safflower Oils on Dry Matter Intake, Nutrient Digestibility, Milk Production, and Milk Composition in Dairy Goats

Vargas‐Bello‐Pérez

Jiménez

Ayala-Hernández

et al. 2020

Animals

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This study determined the effect of protected dietary oils on dry matter intake (DMI), digestibility and milk production in dairy goats. Nine Saanen goats were used in a 3 × 3 Latin square design with three periods of 25 days. A basal diet based on barley hay and corn silage was supplemented with 2.7% DM of calcium soaps of either palm (PO), canola (CO) or safflower (SO) oils. Data for dry matter intake, nutrient digestibility and milk production was analyzed using the general linear model (GLM) procedure of SAS. Gas production data was analyzed using the procedure of non-linear regression analysis (PROC NLIN) from SAS. Nutrient intakes were not affected by treatments. However, compared with CO, the digestibility of dry matter (653 vs. 552 and 588 g/kg), organic matter (663 vs. 559 and 606 g/kg) and neutral detergent fiber (616 vs. 460 and 510 g/kg) were lowered (p < 0.001) by SO and PO. Compared with CO, in vitro gas production increased (p < 0.001) in PO and SO (174 vs. 201 and 206 mL gas/g incubated DM). Compared with PO and CO, milk production increased (p < 0.001) with SO (0.88 and 0.95 vs. 1.10 kg/d, respectively). With regard to PO and SO, CO decreased fat (34 and 35 vs. 32 g/d) and protein (35 and 38 vs. 30 g/d) in milk. In conclusion, compared to the traditional use of calcium soaps manufactured from PO, protected SO resulted in increased milk yield without negative effects on digestibility and nutrient intake.

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Quality and fatty acid profile of the milk of indigenous goats subjected to different local diets in Tunisian arid lands

Cited by 18 publications

References 40 publications

Changes in the composition and fatty acid profile of Najdi ewes’ milk before and after weaning

Changes in the composition and fatty acid profile of Najdi ewes’ milk before and after weaning

Fatty acid profile of goat milk in diets supplemented with chia seed (Salvia hispanica L.)

Effects of Calcium Soaps from Palm, Canola and Safflower Oils on Dry Matter Intake, Nutrient Digestibility, Milk Production, and Milk Composition in Dairy Goats

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