CASE STUDY: Carcass characteristics of Angus steers finished on grass or grain diets at similar quality grades

Cruz, G. D.; Acetoze, Gabriela; Rossow, Heidi A

doi:10.15232/s1080-7446(15)30236-9

Cited by 6 publications

(5 citation statements)

References 25 publications

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“…should be distinguished from one another when discussing potential health benefits. Finally, the present study was the first to show that by feeding grain for a short period of time, it results in lower SFA than GF25 or CON and higher long-chain n-3 PUFA (EPA and DPA) than CON, suggesting that this type of system not only benefits from decreased carbon footprint and requires less grazing land compared to GF systems 29 but can have a FA profile that results in similar benefits to those that are 100% GF. Overall, with the increase in demand for niche market beef, more research using a holistic approach needs to be conducted to accurately identify how different beef systems that are currently being produced by ranchers affect beef FA profiles.…”

Section: ■ Discussionmentioning

confidence: 53%

“…The higher total FA content of LT was expected for grain-fed cattle, which typically finish at a higher quality grade (i.e., more marbling fat) than GF cattle due to the higher energy availability of feedlot rations. 28,29 However, what is unique in the present study is the degree of difference in total FA content between different GF systems. To our knowledge, the present study was the first to demonstrate that cattle finished on irrigated pasture for 5 months (GF25) resulted in similar LT total FA content as cattle fed on grass and finished in the feedyard for 45 days (45GR).…”

Section: ■ Discussionmentioning

confidence: 86%

“…Total FA content of the LT was consistent with previous studies. 13,28,29 Despite the total PUFA content of LT remaining constant across diets (P = 0.73), the total n-3 PUFA was greatest in GF steers, followed by 45GR and CON (P < 0.05). The most concentrated n-3 PUFA was α-linolenic acid (18:3n-3; ALA), and its content reflected differences found for total n-3 PUFA, being highest when finishing on forage (GF20 and GF25), followed by 45GR and CON steers (P < 0.05).…”

Section: Nutrient and Fa Composition Of Experimental Dietsmentioning

confidence: 97%

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Effects of Multiple Grass- and Grain-Fed Production Systems on Beef Fatty Acid Contents and Their Consumer Health Implications

Klopatek

Yang

et al. 2022

ACS Food Sci. Technol.

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Despite the perception that grass-fed beef contains healthier fats, nutritional differences between different grass-fed systems and grain-fed systems are not well explored. Therefore, the present study compares the fatty acid profiles of four different Western United States beef systems including (1) steers finished in a feedyard (120 days; CON), (2) steers grass-fed for 20 months (GF20), (3) steers grass-fed for 20 months with a 45-day grain finish (45GR), and (4) steers grass-fed for 25 months (GF25). Longissimus thoracis serving of n-3 PUFA was lowest for CON compared to all other treatments (P < 0.05). No difference in eicosapentaenoic acid or docosapentaenoic acid was observed between 45GR, GF20, and GF25 (P > 0.05). Grass-fed treatments resulted in t10-18:1:t11-18-1 ratios 15 to 24 times lower compared to CON (P < 0.05). Grass-and grain-finishing resulted in nutritional trade-offs rather than nutritional absolutes with GF25 and 45GR resulting in a more favorable fatty acid profile than GF20.

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Section: ■ Discussionmentioning

confidence: 53%

Section: ■ Discussionmentioning

confidence: 86%

Section: Nutrient and Fa Composition Of Experimental Dietsmentioning

confidence: 97%

See 1 more Smart Citation

Effects of Multiple Grass- and Grain-Fed Production Systems on Beef Fatty Acid Contents and Their Consumer Health Implications

Klopatek

Yang

et al. 2022

ACS Food Sci. Technol.

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“…The transparency paper with the muscle tracings was photocopied and the muscle tracings were cut out and weighed in grams (Sartorius LA-120S scale). Grams were converted to area using the following equation ( Cruz et al, 2013 ):…”

Section: Methodsmentioning

confidence: 99%

The use of ultrasound to measure muscle depth and area in postmortem Holstein dairy calves

Davis

Rossow

2018

Translational Animal Science

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Monitoring growth of neonatal dairy calves is a useful management tool to assist producers in achieving goals for reproduction and performance. The goal of this study was to examine ultrasound as an in vivo tool to quantify longissimus dorsi muscle (ribeye) linear depth and extensor carpi radialis (ECR) and semitendinosus (ST) muscle cross-sectional areas in postmortem preweaned Holstein calves. Postmortem preweaned calves (n = 137, age 13.1 d ± 15.5 SD, body weight 36.5 kg ± 7.2 SD) were obtained from two California calf ranches between April and July 2013. Two operators collected ultrasound images of the ribeye, ECR, and ST muscles using an Aloka 500V equipped with a 5-cm 7.5-MHz linear transducer. Ultrasound ribeye linear depth and ECR and ST cross-sectional areas were calculated using the Ultrasound Image Capture System. Ultrasound measurements were compared to dissected (carcass) measures. Carcass ribeye linear depth was estimated using a ruler. Dissected ECR and ST muscle cross-sectional areas were estimated by tracing muscle cross sections onto transparency paper and then photocopying, cutting out, and weighing individual paper muscle tracings. Weights of the tracings were then converted to areas using the known area of a standard 8.5 × 11 inch paper. Data were analyzed by regressing carcass estimates on observed ultrasound measurements. The coefficient of determination (R2) indicated that ultrasound measurements were most closely associated with carcass measurements for the ST muscle (R2 = 0.60, 0.62 for operator 1 and 2, respectively) when compared to the ribeye and ECR muscles (R2 = 0.27, 0.41 for ribeye and 0.43, 0.32 for ECR for operator 1 and 2, respectively). The mean bias showed consistent underestimation by the ultrasound measurements when predicting carcass measurements for all three muscles and for both operators (ribeye bias = 0.15, 0.40; ECR bias = 0.95, 1.15; and ST bias = 0.73, 0.27 for operator 1 and 2, respectively). Operator contributed significantly in explaining a proportion of the variation in the regression equation for the ST muscle only, whereas calf body weight contributed significantly in explaining a proportion of the variation in the regression equation for all three muscles. The results of this study demonstrated that ultrasound measurements of the ST were the most accurate for quantifying the cross-sectional area when compared to both the ECR and ribeye in postmortem Holstein calves.

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“…Realini et al (2009) também observaram a mesma tendência ao realizar painel sensorial não treinado na Espanha, Inglaterra e Alemanha com a carne Uruguaia de animais que se alimentaram somente de pasto, pasto suplementado em dois níveis crescentes e somente concentrado. Enquanto que Cruz et al (2013) não encontraram diferenças sensoriais entre animais Angus terminados em pastagem ou confinamento.…”

Section: Parâmetrosunclassified

Diferentes sistemas de terminação e seus efeitos na carcaça e carne de novilhos angus superprecoces

et al. 2021

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O objetivo deste trabalho foi avaliar características da carcaça, qualidade e atributos sensoriais da carne de novilhos Angus terminados em diferentes sistemas. Foram avaliadas três dietas de terminação: confinamento convencional (CC) baseado em silagem de milho e um concentrado comercial; confinamento alto grão (AG) composto de 85% milho grão + 15% de concentrado proteico-vitamínico-mineral; a pasto (AP) com suplementação energética de milho a 0,8% do peso vivo (PV), com pastagens de aveia, azevém, festuca e trevo mais 0,8% do peso vivo de milho grão durante 30 dias pré-abate. Foram utilizados 31 bovinos Aberdeen Angus castrados, com média de 12±2 meses de idade e peso inicial de 315±5 kg. A carne dos animais confinados (CC e AG) apresentou maior maciez (p<0,0064) e intensidade de cor vermelha (p<0,0001); os animais apresentaram maior área de olho de lombo (p<0,036); na análise sensorial, maior suculência (p=0,0021), maciez (p<0,0001) e aceitabilidade geral (p=0,0054) foram relatadas. Animais do tratamento AG apresentaram maior rendimento de carcaça (p<0,001) e espessura de gordura subcutânea (p<0,001). A coloração amarela da gordura (0h) foi maior nos tratamentos CC e AP (p<0,0426). Houve variação entre os valores de pH no abate (0h), após resfriamento (24h) e da carne (48h) entre os tratamentos, entretanto dentro dos padrões. Foi produzida uma carne com maior qualidade, principalmente em termos de rendimento de carcaça, maciez e coloração da carne na terminação em confinamento. Na análise sensorial, consumidores preferiram a carne de animais confinados, CC ou AG, frente à carne de animais terminados a pasto com suplementação energética.

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CASE STUDY: Carcass characteristics of Angus steers finished on grass or grain diets at similar quality grades

Cited by 6 publications

References 25 publications

Effects of Multiple Grass- and Grain-Fed Production Systems on Beef Fatty Acid Contents and Their Consumer Health Implications

Effects of Multiple Grass- and Grain-Fed Production Systems on Beef Fatty Acid Contents and Their Consumer Health Implications

The use of ultrasound to measure muscle depth and area in postmortem Holstein dairy calves

Diferentes sistemas de terminação e seus efeitos na carcaça e carne de novilhos angus superprecoces

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