Componentes principais das características de carcaças de bovinos anelorados e fontes de variação em lesões

Silva, Fredson Vieira e; Soares, Franklin D.S.; Oliveira, Laura L.S.; Toral, Fábio Luiz Buranelo; Reis, Sidnei Tavares dos; Alves, Dorismar David; Júnior, Vicente Ribeiro Rocha; Gomes, Ricardo Rodielle Rodrigues

doi:10.1590/s0100-736x2015000200009

Cited by 3 publications

(6 citation statements)

References 14 publications

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“…Uma forma mais acurada de estimar associações de variáveis que são correlacionadas, como é caso dos escores de EPM e as variáveis da carcaça (Tabela 3), é através de análises multivariadas (SILVA et al, 2015;FERREIRA et al, 2018;OLIVEIRA et al, 2019a;OLIVEIRA et al, 2019b). Esta ferramenta estatística pode ser usada com sucesso para apoiar a tomada de decisão na escolha de variáveis que efetivamente contribuem para a elucidação do caráter alvo, que nesse caso, é a precocidade em fêmeas da raça Nelore.…”

Section: Resultsunclassified

Escore visual como uma ferramenta eficiente para identificação de bovinos precoces

Gurgel

Gomes

Silva³

et al. 2020

Bol. Ind. Anim.

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A b s t r a c tThe hypothesis tested was that it is possible to identify animals that deposit fat and muscle earlier through indirect evaluation. Thus, the objective of this work was to evaluate the use of visual evaluation of precocity score for the identification of Nelore heifers with an early biotype. Eighteen Nelore heifers aged 9 to 11 months were evaluated visually for body structure (S), precocity (P), and muscle (M) scores. The animals were divided according to precocity scores: animals with scores 4, 5 and 6 were classified as early biotype and those with scores 1, 2 and 3 as late biotype. Loin eye area (LEA) and subcutaneous (SFT) and picanha (biceps femoris muscle) fat thickness (PFT) were measured by ultrasonography. Animals classified as precocious received higher scores (P≤0.05) for S (5.1 vs 2.4) and M (4.4 vs 2.6), which resulted in heavier animals (233.2 vs 202.8 kg). No biotype effect (P≥0.05) was observed for LEA (36.5 cm 2 ), but animals classified as precocious had higher (P≤0.05) SFT (1.3 vs 0.5 cm) and PFT (2.9 vs 2.3 cm). The standardized canonical coefficients showed that PFT (0.78) and the M (-1.02) score are the variables that most affect the first canonical variable positively and negatively, respectively. The first canonical variable explained 100% of the total variation in the traits evaluated. The precocity score was found to be an efficient alternative for the identification of precocious individuals. Animals with an early biotype were better differentiated by fat thickness in the biceps femoris

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Section: Resultsunclassified

Escore visual como uma ferramenta eficiente para identificação de bovinos precoces

Gurgel

Gomes

Silva³

et al. 2020

Bol. Ind. Anim.

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“…Older animals were expected to show higher pH values, since they are usually more reactive than younger animals, depleting their muscle glycogen reserves faster. Although the statistical analysis did not compare males and females, on the average of the different maturities, females (5.54) showed higher pH values than males (5.51), which is probably due to the greater reactivity of the former in relation to males (5) . Working with zebu females divided into eight groups, Leite et al (28) found only one of these to be in the ideal pH range (below 5.8), which was due to the inappropriate management preslaughter, influencing the animal welfare parameters.…”

Section: Resultsmentioning

confidence: 91%

“…Simarly, the high number of bruises is due to the conformation of the animals, that present a higher fatness degree and have less space in vehicles and corrals, being more prone to being hit. Evaluating 15,002 carcasses of Nellore crossbred animals in Minas Gerais State and investigating the probable causative agents of bruises, Silva et al (5) found that injuries originate from several potential factors, and the subcutaneous fat score influences their occurrence, in which carcasses with higher fatness scores (> moderate) had more injuries when compared with carcasses whose fatness was scarce or absent.…”

Section: Resultsmentioning

confidence: 99%

“…The pre-slaughter stress caused by inadequate management and transport conditions increases losses by bruises on the animal (5) , as well as an improper transformation of muscle into meat, reducing the product quality and its shelf life at retailers (6) . Animals under stress have physiological mechanisms of adaptation to adverse conditions (7) ; however, the energy cost of these mechanisms may result in the partial or total absence of muscle glycogen, leading to a decrease in the formation of lactic acid and rapid establishment of the rigor mortis.…”

Section: Introductionmentioning

confidence: 99%

“…Stressful situations intensify according to sex (9) , species, breed, and bloodline (10,11) ; category and age (12) ; body size, anatomical conditions and fatness (13,14) ; and transport and finishing system (15,5) . Thus, reducing the animal stress is a measure of great importance because, in addition to losses in meat quality, stressed animals are more prone to physical injuries, with consequent economic losses.…”

Section: Introductionmentioning

confidence: 99%

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Breed and Carcass Characteristics on Losses by Bruises and Meat Ph in Beef of Steers and Culling Cows

Mendonça

Vaz

et al. 2017

Ciênc. anim. bras.

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This study aimed to evaluate the effects of the genetic group, maturity, and fatness score of cattle on losses by bruises and final pH value of the carcass of steers and cows. The number of bruises and the final pH value of the carcasses were evaluated as response variables in function of the genetic group, the physiological maturity, and the fatness score. Increases of 174.6 and 159.4% cases of bruises were found when maturity evolved from deciduous to eight teeth for males and females, respectively. The carcasses with moderate fat showed a higher number of bruises than scarce-fat carcasses only in males. Bruises increased by 37.93 and 23.52% for the zebu animals compared with taurine cattle, for males and females, respectively. As regards the pH values, there were variations between sexes, with females having, on average, higher pH, which differed between zebu and taurine cattle. Two-teethed males displayed higher pH values than four-teethed animals, while four and six-teethed females presented higher values than the others. Physiological maturity, fatness score, and genetic group influence losses by bruises in bovine carcasses, with older animals being more susceptible to bruises. Zebu animals being are also more susceptible. Females are more susceptible to final pH alterations in the carcass, mainly in the carcasses of zebu animals. Keywords: animal welfare; carcass classification; meat quality. ResumoObjetivou-se avaliar os efeitos de grupo genético, maturidade e escore de gordura de acabamento de bovinos sobre perdas por contusões e valor do pH final da carcaça de bovinos machos e fêmeas. O 2 Cienc. anim. bras., Goiânia, v.18, 1-10, e-45295, 2017Breed and carcass characteristics on losses by bruises… número de contusões e o valor final do pH das carcaças foram avaliados como variável resposta em função do grupo genético, da maturidade fisiológica e do escore de gordura de acabamento. Acréscimos de 174,6 e 159,4% no número de contusões foram verificados quando a maturidade evoluiu de animais dentes de leite para oito dentes para machos e fêmeas, respectivamente. Apenas carcaças de machos com gordura mediana apresentaram maior nível de lesões que gordura escassa. Ocorreram aumentos de 37,93 e 23,52% de contusões para os animais zebuínos, quando comparados a taurinos, para machos e fêmeas, respectivamente. Com relação aos valores de pH, ocorreram variações entre os sexos, tendo as fêmeas, na média, pH mais elevado diferindo entre zebuínos e taurinos. Machos de dois dentes apresentaram valores mais elevados que os de quatro dentes, enquanto as fêmeas de quatro e seis foram superiores às demais. As perdas por contusões em carcaças bovinas são influenciadas pela maturidade fisiológica, o escore de gordura e pelo grupo genético e os animais mais velhos são mais susceptíveis às contusões, assim como os animais zebuínos também são mais susceptíveis. Fêmeas são mais susceptíveis às alterações no pH final das carcaças, principalmente quando a carcaça é proveniente de animais zebuínos. Palavras-chave: bem-esta...

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Multivariate analysis using morphometric and ultrasound information for selection of tilapia (Oreochromis niloticus) breeders

et al. 2019

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This study evaluated morphometric and ultrasound information of tilapia (O. niloticus) breeders through multivariate analysis. We applied correlation, clustering, and principal component analysis to a dataset composed of information from 222 male and female breeders of the improved GIFT strain. The body weight, objective of the breeding program, showed a high positive correlation with most of the morphometric parameters. The formation of clusters indicated characteristics responsible for muscle composition and carcass weight. Some characteristics showed a high correlation, such as body weight and fillet weight (0.98 and 0.94 for females and males, respectively), and a high contribution to the explanation of data variability; of the total characteristics evaluated for females, two explained 75% data variability and four explained 72% for males. We concluded that it is possible to reduce the number of characteristics measured, as well as use information of average daily weight gain and body weight to select female and male breeders, respectively, to drive genetic gains favoring more productive generations.

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Componentes principais das características de carcaças de bovinos anelorados e fontes de variação em lesões

Cited by 3 publications

References 14 publications

Escore visual como uma ferramenta eficiente para identificação de bovinos precoces

Escore visual como uma ferramenta eficiente para identificação de bovinos precoces

Breed and Carcass Characteristics on Losses by Bruises and Meat Ph in Beef of Steers and Culling Cows

Multivariate analysis using morphometric and ultrasound information for selection of tilapia (Oreochromis niloticus) breeders

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