Características da carcaça e da carne de bovinos não-castrados ou castrados terminados em confinamento e alimentados com três níveis de concentrado

Moletta, José Luiz; Prado, Ivanor Nunes do; Fugita, Carlos Alberto; Eiras, Carlos Emanuel; Carvalho, Camila Barbosa; Perotto, Daniel

doi:10.5433/1679-0359.2014v35n2p1035

Cited by 6 publications

(8 citation statements)

References 13 publications

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“…Dessa forma, a imunocastração com a dosagem definitiva aos sete ou nove meses não altera características de maior relevância, na relação produtor/indústria no momento da comercialização. Com relação à condição sexual em bovinos machos, a ação de hormônios androgênicos, principalmente testosterona, é fator promotor de alterações no crescimento animal (Moletta et al, 2014) e nas características de carcaça (Freitas et al, 2008). Tabela 2.…”

Section: Resultados E Discussõesunclassified

Características de carcaça e carne de novilhos Aberdeen Angus submetidos à castração cirúrgica ou imunológica

Machado

Filho

Argenta

et al. 2019

Arq. Bras. Med. Vet. Zootec.

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RESUMO Objetivou-se avaliar as características de carcaça e carne de novilhos Aberdeen Angus castrados cirurgicamente em duas idades ou imunocastrados com dois protocolos. Foram utilizados 48 bezerros, monitorados a partir do nascimento e desmamados, com idade e peso médio inicial de seis meses e de 160±16,54kg, respectivamente. Os animais foram distribuídos aleatoriamente nos seguintes tratamentos: castração cirúrgica ao nascer; castração cirúrgica ao desmame; imunocastração com três doses da vacina Bopriva® e imunocastração com quatro doses da vacina Bopriva®. O delineamento experimental utilizado foi o inteiramente ao acaso. Novilhos imunocastrados com três doses apresentaram maior quebra ao resfriamento e menor espessura de gordura ajustada para 100kg de carcaça fria que castrados cirurgicamente ao nascer (P<0,05). A imunocastração com três doses proporcionou incremento na participação de músculo, em relação às castrações cirúrgicas, mas reduziu a gordura em relação à castração cirúrgica ao nascimento (P<0,05). A relação músculo:osso foi superior nos imunocastrados com três doses em relação a castrados cirurgicamente no desmame (P<0,05). Apesar de variações na participação tecidual na carcaça, a castração imunológica mostrou-se viável em substituição à castração cirúrgica, não alterando os padrões qualitativos da carne.

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Section: Resultados E Discussõesunclassified

Características de carcaça e carne de novilhos Aberdeen Angus submetidos à castração cirúrgica ou imunológica

Machado

Filho

Argenta

et al. 2019

Arq. Bras. Med. Vet. Zootec.

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“…This superior feed efficiency is related to the muscle expressiveness of non-castrated animals and to the lower energy demand for their growth, as previously discussed for slaughter weight and DWG. Moletta et al (2014) pointed out that noncastrated animals use more nitrogen than castrated ones, with increased protein synthesis due to the influence of testosterone.…”

Section: Resultsmentioning

confidence: 99%

“…However, many producers prefer not to castrate male bovines marked for finishing. This is to take advantage of the anabolic hormone (testosterone), which promotes muscle hypertrophy and results in greater weight gain, slaughter and carcass weights, as well as carcass and muscle yields (Moletta et al, 2014). In addition, this type of procedure is also negatively perceived due to the distress inflicted to the animals (Coetzee et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Meta-analysis of the immunocastration technique (anti-GnRH) for male bovines in the finishing phase

Machado

Joner

Pereira

et al. 2018

Pesq. agropec. bras.

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The objective of this work was to analyze the effects of immunocastration on the performance and carcass quality of steers in the finishing phase, compared with non-castration and surgical castration. Data from ten studies with records of 1,261 male bovines were analyzed. The studies included in the meta-analysis necessarily contained treatments with immunocastration specifically against the gonadotropin-releasing hormone. Each study was considered as a random effect in the statistical model used. The data were tested for homogeneity of variances and residue normality, and then subjected to the analysis of variance. Means were compared by Student’s t-test. Non-castrated steers showed greater daily weight gain, feed efficiency, slaughter and hot carcass weights, and loin eye area, besides lower fat thickness than surgically-castrated animals and the lowest a* and b* meat coloration values. Overall, immunocastrated steers were inferior to the non-castrated ones, but superior to those surgically-castrated. Immunocastrated steers present performance and carcass traits superior to those of surgically-castrated animals, but similar meat quality.

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“…Intact lambs develop faster than spayed lambs, showing greater muscle gain and less fat deposition compared to castrated females and males. This response can be attributed to the action of testicular hormones, especially testosterone (Moletta et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Effect of castration and vitamin E supplementation on carcass and meat quality of Santa Inês lambs

Torres-Geraldo

Sartori-Bueno

Costa

et al. 2019

Rev. colomb. cienc. pecu.

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Background: Carcass and sheep meat quality are influenced by several factors, such as race, age, slaughter weight, type of diet, and dietary supplementation. Objective: To evaluate the effect of castration and vitamin E supplementation on performance, carcass characteristics and meat of lambs slaughtered at 45 kg. Methods: Thirty-two male lambs (16 castrated and 16 not castrated) were fed diets with or without the inclusion of vitamin E. The animals had an average age of 180 ± 20 days and a mean weight of 25.1 ± 4.6 kg. Performance was evaluated for 56 days, and the animals were slaughtered when reaching a weight of 45 kg. The experimental design was randomized blocks based on initial weights, and variables were assessed by a 2x2 factorial design (castrated and intact, supplemented or not with vitamin E, with a probability of 5%). Results: Higher proportion (p<0.05) of visceral fat was found in castrated animals (kidney: 2.45%, inguinal: 0.57% and omental: 4.96%) than in intact animals (kidney: 1.25%, inguinal 0.27%. and omental 3.12%). The aged meat samples showed no color differences for any of the treatments, but there were differences in shear force for steaks aged for 7 days, where the castrated animals showed an average of 2.64 kgf and intact animals showed an average 3.29 kgf. The animals supplemented with vitamin E had lower shear forces in non-aged samples. Conclusion: Castration increased deposition of visceral and fat coverage but did not influence the cut yields and total carcass yield. The animals supplemented with vitamin E had lower shear forces in non-aged samples.

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Características da carcaça e da carne de bovinos não-castrados ou castrados terminados em confinamento e alimentados com três níveis de concentrado

Cited by 6 publications

References 13 publications

Características de carcaça e carne de novilhos Aberdeen Angus submetidos à castração cirúrgica ou imunológica

Características de carcaça e carne de novilhos Aberdeen Angus submetidos à castração cirúrgica ou imunológica

Meta-analysis of the immunocastration technique (anti-GnRH) for male bovines in the finishing phase

Effect of castration and vitamin E supplementation on carcass and meat quality of Santa Inês lambs

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