Predição da composição física e química da carcaça a partir da composição das diferentes regiões corporais de bezerros machos de origem leiteira até os 110 dias de vida

Carvalho, Paulo Afonso; Sánchez, Luis Maria Bonnecarrère; Pires, Cléber Cassol; Viégas, Julio; Velho, João Pedro; Paris, Wagner

doi:10.1590/s1516-35982003000600026

Cited by 3 publications

(6 citation statements)

References 6 publications

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“…This is probably explained by the increased weight gain of the animals. Cezar & Sousa (2007) stated that the increased age and weight at slaughter resulted in the proportional increase of muscle deposition in the region of the trunk, which was consistent with the findings by Morand-Fehr (1981) and Warmington & Kirton (1990), in which growth occurs in a centripetal fashion, that is, by means of progressive waves of growth from the extremities to the thorax.…”

Section: Methodssupporting

confidence: 85%

“…The adipose tissue is the most variable component of the carcass, regarding both its amount and distribution in the carcass (Rosa et al, 2005), with late, though continuous development during the entire life of the animal. Carvalho et al (2003) highlighted factors such as sex, race, species, feeding conditions and breeding system, whereas Macedo et al (2000) reported termination period and weight at slaughter as determinant factors in the amount and distribution of body fat, which was also observed by Pinheiro et al (2007) in ovines Ile de France × Ideal) and Teixeira et al (1995) in goats of the Serrana race. It is important to stress that during dissection, the adipose tissue is the most difficult to be removed, particularly in young animals (Sanz Sampelayo, 1992) or when the carcasses are from animals with low body weight (Yáñez et al, 2007).…”

Section: Resultsmentioning

confidence: 83%

“…Similar results were obtained by Malan (2000) for Boer goats that, according to Oman et al (1999), have transmitted the productive characteristics of this race to the crossbred animals. Regarding subcutaneous fat, when the animals grow and reach physiological maturity, greater amounts of fat are externally deposited on the skin (Cezar & Sousa, 2007) and, in goats, particularly animals for meat, this adipose tissue is less thick or scarce (Monte et al, 2007). It is worthy to consider that the results of yield prediction and correlation of bone tissue of the shoulder with the carcass can be caused by the following aspects: early development of bone tissue (Osório et al, 2001) and the cut (Furusho-Garcia et al, 2006), less variation in bone tissue in the carcass and also because of the earlier development of front limb bones compared to the posterior limb bones (Cezar & Sousa, 2007…”

Section: Resultsmentioning

confidence: 99%

“…More practical, faster and less expensive methods are used to estimate the carcass composition, particularly from the muscle and fat, such as biometric measurements, body mass index, body condition scoring, loin area, among others (Cezar & Sousa, 2007). Silva & Pires (2000) stress the importance of carcass measurements because they allow comparisons among breeds, carcass weight and age at slaughter, and feeding systems.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of carcass tissue composition of F1 crossbred goats finished on native pasture

et al. 2011

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The objective of this study was to estimate tissue composition of the carcass from physical composition of commercial cuts of F1 crossbred goats (Boer with females of non-defined racial standard) finished on native pasture with four levels of supplementation with concentrate (0.0; 0.5; 1.0 and 1.5% of BW in dry matter). It was used 24 non-castrated animals at initial body weight of 15.52 kg and at 120 days of age. The carcass was sectioned in the half, and from the lefthalf carcass, the following cuts were detached: leg, loin, ribs, shoulder and neck, which were dissected in muscle, bone and fat. Carcass weight and yield were predicted from the weight and yield of tissues in the commercial cuts by regression analysis. All the cuts can be used to predict muscle and fat weight in the carcass. For the muscle, the relationship was linear and positive in the cuts leg, ribs, shoulder and neck, and cubic in the loin; for all the cuts, fat kept a linear relationship with the carcass. Muscle and fat yield of all the commercial cuts showed a positive linear relationship with carcass yield, except for rib fat, for which a cubic relationship was found. Considering all the results obtained and using the relationship with the highest determination coefficient, the ribs were the cut that provided the best estimate of the carcass muscle and fat yields of F1 crossbred goats (Boer with females of non-defined racial standard) finished on native pasture.

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Section: Methodssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Prediction of carcass tissue composition of F1 crossbred goats finished on native pasture

et al. 2011

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“…Permite determinar também se as carcaças produzidas apresentam elevada proporção de músculos e adequada deposição de gordura, conforme as exigências do mercado consumidor (Carvalho et al, 2003;Véras et al, 2001). Também em estudos de crescimento animal, seja estimando curvas de deposição ou degradação de tecidos corporais, notadamente músculo (Gerrits et al, 1998) e tecido adiposo (Sprinkle et al, 1998), seja comparando diferentes grupos genéticos em termos de características de carcaça e da carne (Bidner et al, 2002), a determinação da composição da carcaça se torna imprescindível.…”

Section: Introductionunclassified

Validação das equações desenvolvidas por Hankins e Howe para predição da composição da carcaça de zebuínos e desenvolvimento de equações para estimativa da composição corporal

Paulino¹,

Costa²,

Filho³

et al. 2005

R. Bras. Zootec.

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RESUMO -Validaram-se as equações desenvolvidas por Hankins e Howe (1946) para fins de predição da composição física e química da carcaça e desenvolveram-se equações a partir de corte da costela para se estimar a composição química do corpo vazio. Foram utilizados 19 novilhos anelorados, com peso vivo médio inicial de 270 kg e 24 meses de idade, castrados -quatro pertencentes ao grupo referência, três ao grupo mantença e 12 distribuídos uniformemente em três grupos, com diferentes níveis de concentrado na dieta (5, 35 e 65% na base da matéria seca total). Como volumoso, foi utilizado pré-secado de capim-braquiária (Brachiaria brizantha) e de capim-tifton 85 (Cynodon sp.). As dietas foram isoprotéicas e os alimentos foram fornecidos permitindo-se cerca de 5% de sobras. Os animais do grupo mantença e dos tratamentos com 5, 35 e 65% de concentrado foram alimentados por um período de, respectivamente, 84, 109, 104 e 102 dias, após o qual foram abatidos, apresentando peso vivo médio de 340,25; 360,55 e 374,50 kg, respectivamente. Após o abate, procedeuse à dissecação completa da carcaça direita e do corte das 9-10-11 a costelas, retirado da carcaça esquerda. O corte das 9-10-11 a costelas estimou satisfatoriamente a composição física da carcaça dos animais e estimou adequadamente os conteúdos de proteína, água e minerais da carcaça, enquanto o teor de extrato etéreo foi superestimado em 7,8%. Foi desenvolvida uma equação para estimar a porcentagem de extrato etéreo na carcaça a partir da porcentagem desse componente no corte das 9-10-11 a costelas: % EE na carcaça = 1,0709 + 0,7854 * % EE no corte das 9-10-11 a costelas, r 2 = 0,97. A composição química do corpo vazio pode ser estimada satisfatoriamente a partir da composição química do corte das 9-10-11 a costelas, entretanto, mais informações devem ser geradas para que se possa obter equações mais abrangentes e aplicáveis de forma confiável.Palavras-chave: animais mestiços, corte das 9-10-11 a costelas, equações de estimação Validation of the Equations Proposed by Hankins and Howe for Estimating the Carcass Composition of Zebu cattle and Development of Equations to Predict the Body CompositionABSTRACT -The equations developed by Hankins and Howe were validated in order to predict the physical and chemical carcass composition and equations were developed aiming to estimate the body composition of zebu cattle from the 9-10-11 th rib cut composition. Nineteen Zebu steers, with 270 kg of initial live weight (LW) and 2 years old were used. Four were slaughtered in the beginning of the trial, performing the reference group, three were fed to the maintenance level and the remaining were uniformly allotted into three treatments, with different levels of concentrate in the diets (5, 35, 65 %, in the total dry matter basis). Brachiaria brizantha and Cynodon spp haylage were used as the roughage source of the diets. The diets were isonitrogenous and the animals were fed ad libitum. The animals of the reference group and those of the treatments with 5, 35 and 65 % of concentrat...

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In vivo ultrasound and biometric measurements predict the empty body chemical composition in Nellore cattle

Castilhos

Francisco

Branco

et al. 2018

Journal of Animal Science

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Evaluation of the body chemical composition of beef cattle can only be measured postmortem and those data cannot be used in real production scenarios to adjust nutritional plans. The objective of this study was to develop multiple linear regression equations from in vivo measurements, such as ultrasound parameters [backfat thickness (uBFT, mm), rump fat thickness (uRF, mm), and ribeye area (uLMA, cm2)], shrunk body weight (SBW, kg), age (AG, d), hip height (HH, m), as well as from postmortem measurements (composition of the 9th to 11th rib section) to predict the empty body and carcass chemical composition for Nellore cattle. Thirty-three young bulls were used (339 ± 36.15 kg and 448 ± 17.78 d for initial weight and age, respectively). Empty body chemical composition (protein, fat, water, and ash in kg) was obtained by combining noncarcass and carcass components. Data were analyzed using the PROC REG procedure of SAS software. Mallows' Cp values were close to the ideal value of number of independent variables in the prediction equations plus one. Equations to predict chemical components of both empty body and carcass using in vivo measurements presented higher R2 values than those determined by postmortem measurements. Chemical composition of the empty body using in vivo measurements was predicted with R2 > 0.73. Equations to predict chemical composition of the carcass from in vivo measurements showed R2 lower (R2< 0.68) than observed for empty body, except for the water (R2 = 0.84). The independent variables SBW, uRF, and AG were sufficient to predict the fat, water, energy components of the empty body, whereas for estimation of protein content the uRF, HH, and SBW were satisfactory. For the calculation of the ash, the SBW variable in the equation was sufficient. Chemical compounds from components of the empty body of Nellore cattle can be calculated by the following equations: protein (kg) = 47.92 + 0.18 × SBW - 1.46 × uRF - 30.72 × HH (R2 = 0.94, RMSPE = 1.79); fat (kg) = 11.33 + 0.16 × SBW + 2.09 × uRF - 0.06 × AG (R2 = 0.74, RMSPE = 4.18); water (kg) = - 34.00 + 0.55 × SBW + 0.10 × AG - 2.34 × uRF (R2 = 0.96, RMSPE = 5.47). In conclusion, the coefficients of determination (for determining the chemical composition of the empty body) of the equations derived from in vivo measures were higher than those of the equations obtained from rib section measurements taken postmortem, and better than coefficients of determination of the equations to predict the chemical composition of the carcass.

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Predição da composição física e química da carcaça a partir da composição das diferentes regiões corporais de bezerros machos de origem leiteira até os 110 dias de vida

Cited by 3 publications

References 6 publications

Prediction of carcass tissue composition of F1 crossbred goats finished on native pasture

Prediction of carcass tissue composition of F1 crossbred goats finished on native pasture

Validação das equações desenvolvidas por Hankins e Howe para predição da composição da carcaça de zebuínos e desenvolvimento de equações para estimativa da composição corporal

In vivo ultrasound and biometric measurements predict the empty body chemical composition in Nellore cattle

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