Effects of Testosterone Enanthate on Lamb Carcass Composition and Quality

Jacobs, J. A.; Field, R. A.; Botkin, M. P.; Kaltenbach, C. C.; Riley, M. L.

doi:10.2527/jas1972.34130x

Cited by 22 publications

(22 citation statements)

References 10 publications

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“…Em geral, a proporção de gordura é menor nos machos não-castrados e maior nas fêmeas (Deambrosis, 1972) e isso ocorre em virtude do grau de maturidade e da ação do hormônio masculino (testosterona), que promove o crescimento muscular e esquelético determinando carcaças mais magras (Jacobs et al, 1972). Apesar disso, não foi observada diferença entre sexos neste experimento, o que pode ser justificado pela alimentação adequada dos animais Tabela 3 -Características de carcaça de caprinos de cinco grupos raciais criados em confinamento em confinamento e pelo abate precoce, como observado por Pires et al (1999), que encontraram resultados semelhantes para cordeiros confinados abatidos aos 100 dias de idade.…”

Section: Resultsunclassified

Características de carcaça de caprinos de cinco grupos raciais criados em confinamento

et al. 2011

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RESUMO -Este trabalho foi realizado com o objetivo de avaliar a influência do grupo racial e da condição sexual nas características da carcaça de caprinos jovens criados em confinamento. Foram utilizados 91 animais, 52 machos e 39 fêmeas, pertencentes a cinco grupos raciais: Alpino, ½Boer + ½Alpino, ½Anglo Nubiano + ½Alpino, ¾Boer + ¼Alpino, e ½Anglo Nubiano + ¼Boer + ¼Alpino. Foi tomado o peso ao jejum, no dia do abate, após 24 horas de jejum de sólidos. Foram tomadas medidas biométricas e de carcaça, objetiva e subjetivamente. O grupo racial influenciou a altura de cernelha, o comprimento interno e externo da carcaça e o comprimento de perna, que foram maiores nos animais Alpinos, bem como a largura do peito, o escore corporal, os índices de compacidade da carcaça e da perna e a cobertura de gordura da carcaça, que foram melhores nos animais com grau de sangue Boer. Animais machos tiveram maior altura de cernelha, medidas da estérnebra com ultrassom, comprimento interno da carcaça, comprimento de perna, profundidade dos tecidos na altura da 3 a e 4 a estérnebras tomadas na carcaça. Nas demais características corporais avaliadas, não foram encontradas diferenças entre grupos raciais e sexo dos animais. O cruzamento do grupo Boer com Alpino reduz o comprimento das carcaças e aumenta a cobertura de gordura e a quantidade de tecidos depositados, mas não influencia o desempenho do animal.Palavras chave: cabritos, conformação, grupo genético, raça, rendimento Carcass traits of characteristics of kid goats from five breed groups raised in a feedlot systemABSTRACT -This study was carried out with the objective of evaluating the influence of breed groups and sexual conditional on carcass traits of young goats raised in feedlot. It was used 91 animals, 52 males and 39 females, belonging to five breed groups: Alpine, ½Boer + ½Alpine, ½Nubian + ½Alpine, ¾Boer + ¼Alpine and ½ Anglo-Nubian + ¼Boer + ¼Alpine. On the slaughter day, the shrunk weight was measured after 24 hours of solid fasting. Biometric and carcass measures were objectively and subjectively taken. Racial group influenced withers, internal and external carcass length, and leg length, which were greater for Alpine animals, as well as chest width, body condition score, carcass and leg compactness index and fat thickness on carcass, which were better in animals with Boer blood degree. Male animals showed greater withers, measures of sternebrae by ultrasound, internal carcass length, leg length, tissue depth height between 3 rd and 4 th sternebrae measured on carcass. On the other body evaluated characteristics, it was not found any differences among breed groups and sex of the animals. Crossing Boer with Alpine reduces carcass length, and increases fat thickness and deposited tissue, however, it does not change animal performance.

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Section: Resultsunclassified

Características de carcaça de caprinos de cinco grupos raciais criados em confinamento

et al. 2011

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“…Conformation is related to genetics and fattening status, and the latter can be influenced by the animal gender, especially as the animal ages (Jacobs et al, 1972;Seideman et al, 1982;Safari et al, 1988).…”

Section: Resultsmentioning

confidence: 99%

Impact of total substitution of corn for soybean hulls in diets for lambs

et al. 2015

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-The experiment was conducted to assess the effect of substituting corn for soybean hulls on the apparent digestibility of nutrients, carcass performance and characteristics, and yield of cuts of 25 non-castrated male Santa Ines lambs with an initial body weight of 20±2 kg, at approximately 6 months of age, sheltered individually in stalls (1.10 × 1.0 m), considering a totally randomized design, fed 600 g/kg of forage and 400 g/kg of concentrate. Soybean hulls replaced corn at 0, 250, 500, 750, and 1,000 g/kg of dry matter. The intake of dry matter (DM), organic matter (OM), neutral detergent fiber (NDF), acid detergent fiber (ADF), NDF corrected for ash and protein (NDFap), total carbohydrates (TC), non-fibrous carbohydrates (NFC) and total digestible nutrients (TDN) in g/day, and the digestibility of NFC increased linearly with the soybean hull replacement. Crude protein intake displayed a quadratic response, whereas the intake of EE in g/day, the apparent digestibility coefficients of DM, OM, CP, EE, NDF, ADF, NDFap and TC, TDN, average daily gain, carcass characteristics, and yield of cuts were not affected by the soybean hull levels. Soybean hull substitution increased the intake of DM and nutrients, making it possible to replace up to 1,000 g/kg of dry matter in the diets for confined sheep, as it does not compromise performance, digestibility, carcass characteristics, or yield of cuts when used in sheep nutrition.

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“…Possivelmente, o melhor desempenho dos machos deve-se à maior ação do hormônio masculino, que proporciona benefícios para os machos não castrados em relação às fêmeas. Conforme Jacobs et al (1972), o desenvolvimento de características secundárias em machos não castrados é atribuído à produção de testosterona, o que aumenta a eficiência alimentar e promove crescimentos muscular e esquelético.…”

Section: Resultsunclassified

Influência do tipo de parto e do sexo no desempenho e nas características da carcaça de cordeiros cruza Ile de France x Texel

et al. 2011

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Effect of birth type and sex on performance and carcass characteristics of Ile de France x Texel crossbred lambsThe effect of birth type and sex on performance and carcass characteristics of Ile de France x Texel crossbred lambs was evaluated in an experiment conducted at the Department of Animal Science, Federal University of Santa Maria (UFSM). Twelve non-castrated lambs and six ewe lambs were used in the study. The experiment was arranged in a completely randomized design, with six repetitions. The treatments were: entire lambs born as single, entire lambs born as twin and ewe lambs born as twin. The average daily weight gain from birth to 21 days of single lambs was higher (P <0.05) than lambs and ewe lambs born as twin. However, after the initial lactation period, when milk is no longer the main component of the diet, it was found that single lambs showed similar performance to that born as twin. Entire lambs had higher weight gain (P <0.05) than ewe lambs after 42 days of age. Carcass characteristics of single lambs and lambs and ewe lambs born as twin were similar, except for hot and cold carcass weights, carcass internal length and leg length, for which males were superior to females.

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Effects of Testosterone Enanthate on Lamb Carcass Composition and Quality

Cited by 22 publications

References 10 publications

Características de carcaça de caprinos de cinco grupos raciais criados em confinamento

Características de carcaça de caprinos de cinco grupos raciais criados em confinamento

Impact of total substitution of corn for soybean hulls in diets for lambs

Influência do tipo de parto e do sexo no desempenho e nas características da carcaça de cordeiros cruza Ile de France x Texel

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