A note on the ease of handling and flight distance of <i>Bos indicus, Bos taurus</i> and their crossbreds

Kabuga, J. D.; Appiah, Patrick

doi:10.1017/s0003356100036953

Cited by 14 publications

(11 citation statements)

References 4 publications

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“…Some others studies have revealed distinct reactions between genotypes, reporting for Bos indicus breeds or crossbreds greater agitation compared with Bos taurus (Grandin & Deesing, 1998;Barbosa-Silveira et al, 2006;Barbosa-Silveira et al, 2008a, b). However, Kabuga & Appiah (1992) did not verify differences of handling ease between Bos taurus and Bos indicus crossbred steers, suggesting that it was more influenced by raising conditions and previous management.…”

Section: Discussionmentioning

confidence: 71%

“…Highly agitated or flighty animals yield tougher meat (Voisinet et al, 1997b;King et al, 2006;Kadel et al, 2006) and present higher losses of meat due to bruising (Fordyce et al, 1988b). However, Kabuga & Appiah (1992) and Barbosa-Silveira et al (2008a) did not verify differences for weight gain between genetic groups of Bos taurus and Bos indicus crossbred steers. These authors suggested that management ease was more influenced by raising conditions and previous management experience than by genetic basis.…”

Section: Introductionmentioning

confidence: 94%

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Relationship between temperament with performance and meat quality of feedlot steers with predominantly Charolais or Nellore breed

et al. 2012

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-The relation between temperament with performance and meat quality was determined in 79 Charolais × Nellore steers kept in feedlot. Temperament was evaluated according to exit velocity, scale composite score and flight distance four times in the finishing phase, along with body weight, intake and feed conversion measures. Cattle were classified as calm, intermediate and excited according to exit velocity measures at the beginning of the trial. Excited cattle presented larger values for composite score and flight distance. Irrespective of genotype, excited cattle presented lower average daily gain, dry matter intake and worse feed conversion. Temperament categories did not affect most of beef quality traits, except for calm Bos indicus steers, which presented greater pH measured 1 hour post mortem compared with more reactive steers.However, moderate but negative correlations were detected between exit velocity, flight distance and composite score and beef quality as well as Warner-Bratzler shear value, luminosity, pH measured 24 hours post mortem, although they were not consistent between genotypes raised under the same conditions.

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Section: Discussionmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 94%

Relationship between temperament with performance and meat quality of feedlot steers with predominantly Charolais or Nellore breed

et al. 2012

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“…Entretanto, Sato (1981) identificou que o temperamento do animal não, necessariamente, melhora com a idade e que a melhora está mais associada ao manejo ao qual ele é criado. Segundo alguns autores o efeito do manejo sobre o temperamento bovino é função da experiência passada vivida pelo animal naquele manejo, logo se o animal não sofrer seu temperamento melhora (Sato, 1981;Kabuga & Appiah, 1992;Becker, 1994;Andrade et al, 2001;Uetake et al, 2002;Petherick et al, 2002;Neindre et al, 1996;Beckman et al, 2007). Maffei (2009) não encontrou diferença na reatividade de grupos de contemporâneos de animais da raça Nelore com diferença máxima de idade de três (3) meses.…”

Section: Idade Do Animal E Manejounclassified

Reatividade animal

Maffei¹

2009

R. Bras. Zootec.

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RESUMO -A reatividade é definida como a reação do animal quando contido num ambiente de contenção móvel. Ela é quantificada por meio do teste de reatividade animal em ambiente de contenção móvel -REATEST ® . Este teste consiste num dispositivo eletrônico acoplado à balança e num software específico. O dispositivo capta a movimentação que o animal provoca na balança, durante 20 segundos e a envia para o software que a processa determinando a reatividade do animal numa escala contínua de pontos. Pontuações maiores são de animais mais reativos (mais agressivo). A reatividade foi criada com os objetivos de solucionar os problemas até então existentes na seleção para temperamento e de permitir estimação de parâmetros genéticos mais confiáveis. Ela é uma característica objetiva que tem grande variabilidade fenotípica e é de quantificação rápida, fácil e segura, além de poder ser quantificada em qualquer tipo de balança, o que permite maior aplicabilidade. Ela não interfere nas práticas de manejo das fazendas porque é quantificada no momento da pesagem dos animais. Sua herdabilidade na raça Nelore é de 0,39 ao ano e 0,23 ao sobreano e suas correlações genéticas com ganho de peso diário são de -0,28 do nascimento até desmama e de -0,49 do desmame até ano. Já suas correlações genéticas com desenvolvimento do perímetro escrotal do ano ao sobreano variam de -0,25 e -0,41. Palavras-chave: bovino, reatest, temperamento Confinement reactivityABSTRACT -The confinement reactivity (CR) has been used as a measure of temperament in Brazil and it is defined as the animal reaction when contained in the scale. It is quantified through the animal reactivity test -REATEST®. This test consists of an electronic device coupled to the scale and of specific software. The device captures the movement that the animal provokes in the scale, during 20 seconds and sends it for the software that processes this movement and determines the animal CR in a continuous scale of points. Higher punctuations belong to aggressive animals. The CR was created with the goals of to solve the problems existent in the culling for the better temperament and of to estimate genetic parameters more reliable. The CR is objective, has great phenotypic variability and eliminates the appraiser's subjectivity, besides it doesn't expose him to the danger. The CR doesn't interfere in the handling practices of the ranch because it is quantified in the moment of the animals weighting. The CR is quantified in fast and easy way and for your quantification can use any kind of scale. The direct heritabilities estimates are 0.39 at 12 months of age and 0.23 at 15 months of age. The genetic correlations between CR and daily weight gain (DWG) were -0.28 between CR and DWG-birth to weaning and -0.49 between CR and DWG-weaning to 12 months of age. About the genetic correlations between CR and scrotal circumference grown rate was highest, -0.41. Key Words: bovine, reatest, temperament IntroduçãoCom a globalização, os padrões de qualidade exigidos nos mercados externos têm se integrado...

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“…Kabuga and Appiah (1992) suggested that the ease of cattle handling is influenced a lot more by the raising conditions and experience of the farmer than it is by genetics, after studying Bos indicus that were crossbred with Bos taurus steers. The researchers did not find any differences in temperament between the genetic groups.…”

Section: Introductionmentioning

confidence: 99%

Serum cortisol concentration in cattle of different genetic groups slaughtered in confinement

Pales

Pádua

Santos

et al. 2016

SCA

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The objective of this work was to compare the serum cortisol levels among four genetic cattle groups slaughtered in confinement. Thirty-two non-castrated male bovines from four genetic groups were analyzed: Nelore, Aberdeen Angus × Nelore, Caracu × Nelore, and Guzerá × Nelore. The blood samples were collected on the day of weighing (every 28 days) and during the slaughter. Regarding the concentration of serum cortisol, no significant differences were found among the groups during the first, second, and fourth collections. However, during the third collection and at the day of slaughter, respectively, the Nelore group (3.15 ng/dL; 2.98 ng/dL) showed similarity to the Caracu × Nelore (2.02 ng/dL; 2.07ng/dL) and Guzerá × Nelore (2.33 ng/dL; 2.40 ng/dL) groups. Nelore showed a significant difference compared with the Aberdeen Angus × Nelore group (1.21 ng/dL; 1.61 ng/dL). With respect to the overall collection averages, the Nelore group (2.85 ± 0.87 ng/dL) showed greater values than the Aberdeen Angus × Nelore group (1.61 ± 0.87 ng/dL). However, it showed similarities to the Caracu × Nelore (2.06 ± 1.31 ng/dL) and Guzerá × Nelore (2.48 ± 1.16 ng/dL) groups. It was also observed that animals with low cortisol values gained more weight, as demonstrated by the correlation between ADG and the cortisol collection averages (-0.54; p < 0.05). There was no difference among the groups with respect to shearing strength of the meat, and the correlation between this force and the cortisol collection average (0.15; p > 0.05, ns) showed that meat tenderness in the studied groups was not affected. Key words: Shearing strength. Meat tenderness. Beef steers. ResumoObjetivou-se através deste trabalho comparar o nível sérico de cortisol em quatro grupos genéticos de bovinos terminados em confinamento. Foram avaliados 32 bovinos machos não castrados de quatro grupos genéticos, sendo estes: Nelore, Aberdeen Angus x Nelore, Caracu x Nelore e Guzerá x Nelore. As amostras de sangue foram coletadas nos dias das pesagens, a cada 28 dias e durante o abate, na sangria, para posterior dosagem do cortisol plasmático. Para a concentração de cortisol sérico, não foram encontradas diferenças significativas entre os grupos, na primeira, segunda e quarta coleta, porém na terceira coleta e na coleta do dia do abate, respectivamente o grupo Nelore (3,15ηg/dL; 2,98ηg/

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A note on the ease of handling and flight distance of Bos indicus, Bos taurus and their crossbreds

Cited by 14 publications

References 4 publications

Relationship between temperament with performance and meat quality of feedlot steers with predominantly Charolais or Nellore breed

Relationship between temperament with performance and meat quality of feedlot steers with predominantly Charolais or Nellore breed

Reatividade animal

Serum cortisol concentration in cattle of different genetic groups slaughtered in confinement

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