Fatty acid composition of the longissimus dorsi muscle in crossbred steers fed different sources of fatty acids

Aferri, Gabriela; Leme, Paulo Roberto; Pereira, Angélica Simone Cravo; Silva, Saulo da Luz e; Putrino, Soraia Marques; Júnior, José Esler de Freitas; Rennó, Francisco Palma

doi:10.1590/s1516-35982012000700021

Cited by 3 publications

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“…Animals fed 36 days had higher values for C18:19, C18:2C9C12, this result might be explained by less time on feed with high content of grain. Average ω6:ω-3 was 24%, ideally, this ratio should be less than 4 and should not exceed 25 (Wood et al, 2003, Dervishi et al, 2011, Aferri et al, 2012. Diets high in grains, for example corn, can increase the ω6 and polyunsaturated acids changing the flavor and smell.…”

Section: Resultsmentioning

confidence: 99%

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

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et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. For this research 48 male lambs were divided in randomized blocks in a factorial design, having as factors sexual condition (castrated or uncastrated) and time on feed (36 or 78 days). High grain diet was monitored daily to measure the performance of the animal nutrition. The characteristics of the carcass and meat were taken for the fatty acids profile and sensorial analysis. The effect of the factors as sexual condition and time on feed, and the interaction between them, were evaluated by analysis of variance using the GLM procedure of SAS software and the treatment averages were compared by Student's T test. The uncastrated animals presented greater weight gain and dry matter intake, better feed efficiency, and larger loin area. More time on feed resulted in higher weight at slaughter. Parameters such as pH, color, meat tenderness and sensorial attributes were not affected by treatments. For the fatty acid profile there was effects and interactions between sexual condition and time on feed. It is concluded that castration should not be used when the animal is young and slaughtered and feed intensively, but neutering can be interesting to improve the fatty acid profile of the meat.Keywords: castrated, Dorper, fatty acids, meat, Santa Inês, sheep.Período de confinamento e efeito do sexo sobre o desempenho e características de qualidade da carne de cordeiros RESUMO. No experimento realizado, foram utilizados 48 cordeiros machos divididos em blocos casualizados, em esquema fatorial, sendo tais fatores: a condição sexual (castrado ou não castrado) e tempo de confinamento (36 ou 78 dias). Uma dieta rica em grãos foi ofertada e controlada diariamente para medir o desempenho da nutrição animal, as características da carcaça e da carne foram avaliadas, e foi feita análise sensorial. A condição sexual e o tempo em confinamento, bem como a interação entre eles, foram avaliados por análise de variância, utilizando o procedimento GLM do software SAS e as médias dos tratamentos foram comparadas pelo teste t de estudante (p < 0,05). Os animais não castrados apresentaram maior ganho de peso e consumo de matéria seca. Eles também tiveram uma melhor eficiência alimentar e área de lombo. Mais tempo no confinamento resultou em maior peso ao abate. Parâmetros como pH, cor, maciez da carne e atributos sensoriais não foram afetados pelos tratamentos. Para o perfil de ácidos graxos, houve efeitos e as interações entre condição sexual e tempo de confinamento. Concluiu-se que a castração não deve ser usada quando o animal é novo e criado em sistema intensivo, mas a castração pode ser interessante para melhorar o perfil de ácidos graxos da carne.

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Section: Resultsmentioning

confidence: 99%

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

Mazon

Carvalho

Pesce

et al. 2017

Acta Sci. Anim. Sci.

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“…A relação n-6:n-3 encontrada neste trabalho (Tabela 5) foi de 24%, sendo maior que a observada por Partida et al (2007) e French et al (2000). O ideal é que esta relação seja menor que 4 e não exceda o valor de 25 (WOOD et al, 2003, DERVISHI et al, 2011, AFERRI et al, 2012. Segundo Nürnberg et al (2002), ruminantes alimentados com dietas de alto concentrado podem apresentar relação n-6:n-3 na carne variando de 6 a 10.…”

Section: Perfil De áCidos Graxosunclassified

Efeito da castração e do tempo de confinamento no desempenho, características de carcaça e qualidade de carne de cordeiros cruzados Dorper x Santa Inês

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Fatty acid profile, carcass traits and meat quality of Nellore steers following supplementation with various lipid sources

et al. 2017

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The aim of the present study was to evaluate the fatty acid composition of meat and subcutaneous fat, carcass traits and meat quality of Nellore steers fed diets supplemented with various lipid sources. Forty-five young bulls, with average bodyweight of 441 ± 30 kg, were allotted into 10 paddocks, with five treatments, each consisting of two paddocks. The bulls were randomly assigned into one of the following five treatments, which consisted of four lipid sources: palm oil (PO), linseed oil, rumen protected fat (soybean-based oil), whole soybean, and a control (without additional fat). Trial duration was 120 days, which included 30 days of adaptation. Supplements were offered daily at 10 g/kg bodyweight per day. Dietary supplements for providing additional fat were formulated to consist of 10% ether extract. Lipid sources did not significantly affect the average daily gain (P = 0.797) or dressing percentage (P = 0.663). Supplementation with PO increased the concentrations of lauric acid (P = 0.036) and myristic acid (P < 0.001) in the muscle and subcutaneous fat. Animals supplemented with linseed oil had significantly higher concentrations of conjugated linolenic acid in the meat (P = 0.036) and fat (P = 0.049) than did control animals. In the present study, the use of various lipid sources in dietary supplements of grazing cattle during finishing period did not affect carcass traits or physical attributes of beef. This absence of statistical significance may be related to the minimum number of repeat paddocks (2) per treatment. Thus, differences that can have a practical significance were not evidenced by statistical analysis. The inclusion of PO and protected fatty acids derived from soybean oil (rumen-protected fat) is not recommended as a method to improve the lipid profile of meat and subcutaneous fat of Nellore cattle.

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Fatty acid composition of the longissimus dorsi muscle in crossbred steers fed different sources of fatty acids

Cited by 3 publications

References 32 publications

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

<b>Time on feedlot and sexual effects on animal performance and characteristics of lamb’s meat

Efeito da castração e do tempo de confinamento no desempenho, características de carcaça e qualidade de carne de cordeiros cruzados Dorper x Santa Inês

Fatty acid profile, carcass traits and meat quality of Nellore steers following supplementation with various lipid sources

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