Conjugated linoleic acid content of beef from cattle fed diets containing high grain, CLA, or raised on forages

Poulson, C. S.; Dhiman, T. R.; Ure, A. L.; Cornforth, Daren P.; Olson, K. C.

doi:10.1016/j.livprodsci.2004.07.012

Cited by 71 publications

(45 citation statements)

References 33 publications

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“…These changes in FAs are related to human-health benefits (Ha et al, 1987;Ochoa et al, 2004), changes in the microbial population (Boeckaert et al, 2006), influences on animal metabolism (Bauman et al, 2011) or to enhancement of the overall performance of offspring, when fed to dams during pregnancy and lactation (Pickard et al, 2008;Or-Rashid et al, 2010). There are known differences between the FA profile of meat of grass fed animals and animals fed silage or concentrate-based diets (Poulson et al, 2004;Noci et al, 2005), but there is little information regarding the FA profile of cattle fed tropical grasses. Lipid profile and concentration in the diet are two factors that can influence the profile of fat in muscle and milk.…”

Section: Introductionmentioning

confidence: 99%

The inclusion of low quantities of lipids in the diet of ruminants fed low quality forages has little effect on rumen function

Costa

Quigley

Isherwood

et al. 2017

Animal Feed Science and Technology

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The inclusion of low quantities of lipids in the diet of ruminants fed low quality forages has little effect on rumen function.Animal Feed Science and Technology http://dx.doi.org/10. 1016/j.anifeedsci.2017.09.003 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Addition of fish oil also decreased the concentration in RF of stearic and linolenic acid, but no differences to coconut and cottonseed treatments for linolenic acid. Fish oil also resulted in higher LCFA, linoleic and total unsaturated FA (TUFA), but no differences to soybean oil for the latter two acids. The conjugated linoleic acid (CLA) was only different in RF between cottonseed and fish oil treatments. Differences in FA profile of oils were only partially translated into the FA profile in RF of steers fed a tropical hay, without great changes in the proportion of CLA isomers observed.

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Section: Introductionmentioning

confidence: 99%

The inclusion of low quantities of lipids in the diet of ruminants fed low quality forages has little effect on rumen function

Costa

Quigley

Isherwood

et al. 2017

Animal Feed Science and Technology

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“…During ruminal biohydrogenation of dietary unsaturated lipids, unique fatty acid intermediates including CLA and trans-vaccenic acid, are produced in addition to saturated end products (Scollan et al, 2001). However, the CLA content of beef may also be increased by feeding rumen protected CLA supplements, making CLA available for absorption in the intestine and deposition in tissues (Poulson et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Effects of whole linseed and rumen-protected conjugated linoleic acid enriched diets on beef quality

Barahona

Olleta

Albertı́

et al. 2016

animal

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Instrumental assessments and sensory tests were performed to evaluate the effects of diet and postmortem ageing time (1, 7 and 21 days) on beef quality. A total of 48 Friesian calves were randomly allocated to four dietary treatments: control, whole linseed (10% linseed), conjugated linoleic acid (CLA) (2% protected CLA), and whole linseed + CLA (10% linseed and 2% protected CLA). Animals were slaughtered at 458 ± 16.6 kg live weight and 11 months of age. Ageing was more significant than diet on most instrumental parameters. Meat from linseed enriched diets had greater drip loss ( P ⩽ 0.001) and intramuscular fat ( P ⩽ 0.01) than meat from animals fed CLA. Beef aged for 7 and 21 days had lower cooking losses ( P ⩽ 0.01) and shear force ( P ⩽ 0.001) than beef aged for 1 day. Lightness was affected only by display time. The addition of CLA in the diet increased hue and yellowness, whereas the inclusion of linseed decreased these values, as well as increased redness. Linseed in the diet decreased fat odour ( P ⩽ 0.05), but increased beef ( P ⩽ 0.01) and liver ( P ⩽ 0.05) flavours. Meat aged for 21 days was significantly more rancid ( P ⩽ 0.001), even under vacuum storage. Several organoleptic properties were improved with the inclusion of linseed in the diet, whereas they remained unaffected by the inclusion of CLA.

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“…This is probably due to the higher intake of PUFA in the pasture diets (Poulson et al, 2004). However, animals finished at pasture may take more time to reach the weight and finish that is required to meet similar grading standards at the packing plant (Roberts et al, 2009) and the meat may be less tender than cattle fed in confinement (Rearte and Pierroni, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have reported that grazing animals (Poulson et al, 2004;Fincham et al, 2009;Blanco et al, 2010;Duckett et al, 2013;De Freitas et al, 2014) or fed higher levels of forage than concentrate (75 : 25; Phillip et al, 2007) have greater concentrations of intramuscular CLA, and increased n-3 : n-6 ratio (Poulson et al, 2004;Blanco et al, 2010;Duckett et al, 2013;Guerrero et al, 2013;De Freitas et al, 2014;Lorenzo et al, 2014) probably due to higher amounts of PUFA in the diet. The levels of CLA observed in this experiment were slightly higher than those observed by Realini et al (2004) for grazing and confined animals and lower than those observed by Duynisveld et al (2006).…”

mentioning

confidence: 99%

Productive performance, meat quality and fatty acid profile of steers finished in confinement or supplemented at pasture

Patiño

Medeiros²,

Pereira

et al. 2015

Animal

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Thirty Aberdeen Angus crossbred steers (281 ± 16 kg) were used to test the effect of finishing feeding system on growth performance, meat quality and fatty acid (FA) profile in intramuscular fat. Steers were fed in confinement (forage:concentrate ratio of 50 : 50; DM basis) or with different levels of energy supplementation (0, 0.4, 0.8 and 1.2% BW) at pasture (Avena strigosa Schreb and Lolium multiflorum L.). There were no differences between treatments for ADG (average = 1.60 kg/day), hot carcass weight (HCW) (average = 229 kg) and subcutaneous fat depth (average = 3 mm). Dressing % (P = 0.06; tendency) and carcass ADG (P = 0.02) linearly increased with level of supplementation for pasture steers. No differences were observed between treatments for tenderness, marbling, pH, color b*, or cooking loss and drip loss in samples of Longissimus dorsi. However L* increased linearly (P = 0.05) with level of supplementation. The concentrations of myristic, palmitic, estearic and linoleic FA did not differ among treatments. The concentration of n-3 FA increased (P < 0.001) in steers at pasture compared with confinement, but n-6 FA concentrations did not differ between feeding system. Supplementation up to 0.4% BW increase (P < 0.001) conjugated linoleic acid (CLA) and linolenic FA concentrations in intramuscular fat when compared with confinement. The level of supplementation on pasture linearly decreased (P < 0.001) n-3 and CLA and linearly increased (P = 0.001) the n-6 : n-3 ratio. Finishing of steers grazing winter pasture with energy supplementation or in confinement fed a medium-concentrate diet did not affect meat quality (tenderness, marbling, parameter b* on the CIE L*a*b* scale, cooking and drip losses) except for a* and L*. However, intramuscular fat of animals finished at pasture with moderate level of supplementation compared to animals fed in confinement had greater concentration of CLA, linolenic, and n-3, and lower n-6 : n-3 in intramuscular fat.

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Conjugated linoleic acid content of beef from cattle fed diets containing high grain, CLA, or raised on forages

Cited by 71 publications

References 33 publications

The inclusion of low quantities of lipids in the diet of ruminants fed low quality forages has little effect on rumen function

The inclusion of low quantities of lipids in the diet of ruminants fed low quality forages has little effect on rumen function

Effects of whole linseed and rumen-protected conjugated linoleic acid enriched diets on beef quality

Productive performance, meat quality and fatty acid profile of steers finished in confinement or supplemented at pasture

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