Predicting the chemical composition of the body and the carcass of hair sheep using body parts and carcass measurements

Barcelos, S.S.; Vargas, Julián Andrés Castillo; Mezzomo, Rafael; Gionbelli, Mateus Pies; Gomes, Daiany Íris; Oliveira, Luís Rennan Sampaio; Luz, Janaina Barros; Maciel, Dayana Lima; Alves, Kaliandra Souza

doi:10.1016/j.animal.2020.100139

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…Body measurements are vital in estimating liveweights for farm animals ( 71 ), and this valuable information contributes to decisions in terms of selection and husbandry system aimed at raising the edible lean meat yield and reduction in fat content in carcasses ( 5 ). In sheep and goats, cut yields are predictors of overall carcass tissue composition ( 72 ). In this study, the measures of the primal cut weights were identical in the three groups, except for bones and French racks.…”

Section: Discussionmentioning

confidence: 99%

Fortification of diets with omega-3 long-chain polyunsaturated fatty acids enhances feedlot performance, intramuscular fat content, fat melting point, and carcass characteristics of Tattykeel Australian White MARGRA lambs

et al. 2022

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Meat eating quality indices such as intramuscular fat content (IMF) and fat melting point (FMP) of the Longissimus thoracis et lumborum muscle and the feedlot performance, carcass traits, and commercial wholesale cuts of lot-fed Tattykeel Australian White (TAW) MARGRA lambs as a result of dietary fortification of the diet with omega-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFA) were evaluated. A total of 75 TAW MARGRA lambs at 6 months of age with an average liveweight of 30 ± 1.2 kg were used. The lambs were randomly allocated to the following three dietary treatments of 25 lambs each in a 47-day feeding trial using a completely randomized experimental design: (1) control diet of hay plus pellets without omega-3 oil, (2) hay plus commercial whole grain pellets (MSM) without omega-3 oil, and (3) hay plus pellets fortified with omega-3 oil. It was hypothesized that dietary supplementation with omega-3 fortified pellets will improve feedlot performance, meat-eating quality indices of IMF, FMP, and carcass characteristics. Lot-fed lambs on the MSM whole grain had the highest feed intake of 1.69 kg/day, followed by the control at 1.57 kg/day and the lowest in the omega-3 diet at 1.01 kg/day (p = 0.0001). However, the omega-3 diet had the highest average daily gain of 230 g/head/day (p = 0.0001), indicating the greatest feed efficiency since it had the best growth response with minimal feed intake. Post-slaughter evaluation of the Longissimus thoracis et lumborum muscle revealed significant treatment variations in IMF (p = 0.0001), FMP (p = 0.0001), pH (p = 0.0380), and wholesale French rack primal cut (p = 0.0001). Strong correlations (p < 0.05) between liveweight, temperature, pH, FMP, and IMF were observed. Similarly, significant correlations between carcass characteristics of total saleable meat yield, lean trim, fat trims, bones, and leg shank were evident (p < 0.05). However, there were no treatment differences in the final liveweight, GR fat depth, hot standard carcass weight, or dressing percentage. The findings indicate that feedlot performance, meat-eating quality traits such as IMF and FMP, and commercial wholesale French rack cuts can be further improved during feedlot finishing of TAW MARGRA lambs through dietary supplementation with omega-3 oils, and hence the tested hypothesis of improved meat quality attributes is partially confirmed.

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Section: Discussionmentioning

confidence: 99%

Fortification of diets with omega-3 long-chain polyunsaturated fatty acids enhances feedlot performance, intramuscular fat content, fat melting point, and carcass characteristics of Tattykeel Australian White MARGRA lambs

et al. 2022

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“…For example, some researchers used ultrasound scan to predict weight of breast muscle in broilers ( Koenig et al, 1997 ; Remignon et al, 2000 ; Silva et al, 2006 ), some researchers predicted abdominal fat through live body measurements and ultrasound scan data ( Melot et al, 2003 ; Souza et al, 2017 ). In addition, the indirect detection methods and the live body measurements are also widely used for predicting the carcass characteristics of other animals, including the Muscovy ducks ( Kleczek et al, 2006 ), Japanese Black steers ( Maeno et al, 2014 ), guinea pigs ( Barba et al, 2018 ), Peking duck ( Lin et al, 2018 ), and sheep ( Barcelos et al, 2020 ). Overall, B-ultrasound measurements and live body measurements have been widely used in carcass characteristics prediction in poultry.…”

Section: Introductionmentioning

confidence: 99%

In vivo prediction of abdominal fat and breast muscle in broiler chicken using live body measurements based on machine learning

Chen¹,

He²,

Jiang³

et al. 2023

Poultry Science

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“…Debido a lo laborioso y costoso que resulta conocer la composición tisular de la canal, ya que se requiere la disección completa de la misma, se han evaluado técnicas alternativas para su determinación. Algunos estudios para predecir la composición tisular de la canal de los animales destinados para consumo humano han promovido el estudio de uso de cortes comerciales de la canal como el cuello, los hombros, las costillas y el lomo, así como de otras medidas de la canal, para evaluarlos como predictores de la composición tisular de la canal de los pequeños rumiantes (17,18). Asimismo, la composición tisular de la canal está correlacionada significativamente con el crecimiento animal y el peso corporal (19,20).…”

Section: Discussionunclassified

Prediction of the carcass tissue composition of “Blackbelly” lambs using in vivo and postmortem measurements

et al. 2024

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Objetivo. Predecir la composición tisular de canales de corderos “Blackbelly” usando mediciones in vivo y postmortem. Materiales y métodos. Se utilizaron 20 corderos con una edad de siete meses y peso de 29.07±2.88 kg en promedio. Antes del sacrificio, se midió con ultrasonografía la grasa subcutánea, la profundidad, la amplitud y el área del músculo Longissimus dorsi. Posterior al sacrificio, se registró el peso de la canal y de los tejidos: músculo, grasa y hueso. En la canal, también se midió y registró la profundidad torácica, el largo, el perímetro, el largo y ancho de la pierna, así como el índice de compacidad. Para predecir la composición tisular de las canales se usó análisis de correlación y modelos de regresión. Resultados. Los tejidos de la canal se correlacionaron con la profundidad del músculo L. dorsi (p≤0.05; r entre 0.67 y 0.80) y con el índice de compacidad de la canal (p≤0.05; r varió de 0.54 a 0.75). Las ecuaciones de predicción de la composición tisular de la canal tuvieron una r2 que osciló entre 0.71 a 0.78 para el tejido graso (p≤0.001). Conclusiones. El uso de mediciones in vivo y postmortem permitieron predecir la composición tisular de canales de corderos con una precisión de moderada a alta (r2 >0.71≤ y ≤0.78).

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Predicting the chemical composition of the body and the carcass of hair sheep using body parts and carcass measurements

Cited by 9 publications

References 26 publications

Fortification of diets with omega-3 long-chain polyunsaturated fatty acids enhances feedlot performance, intramuscular fat content, fat melting point, and carcass characteristics of Tattykeel Australian White MARGRA lambs

Fortification of diets with omega-3 long-chain polyunsaturated fatty acids enhances feedlot performance, intramuscular fat content, fat melting point, and carcass characteristics of Tattykeel Australian White MARGRA lambs

In vivo prediction of abdominal fat and breast muscle in broiler chicken using live body measurements based on machine learning

Prediction of the carcass tissue composition of “Blackbelly” lambs using in vivo and postmortem measurements

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