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Clifton A Baile - One of the best experts on this subject based on the ideXlab platform.
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effects of recombinant bovine Somatotropin rbst and season on plasma and milk insulin like growth factors i igf i and ii igf ii in lactating dairy cows
Domestic Animal Endocrinology, 2008Co-Authors: R J Collier, M A Miller, C L Mclaughlin, H D Johnson, Clifton A BaileAbstract:During two studies, effects of recombinant bovine Somatotropin (rbST) on plasma and milk IGF's in cows adapted to summer (S; 12 cows) or winter (W; 12 cows) conditions were evaluated. Each study consisted of on-farm periods (30 days) followed by climatology chamber periods (CC; 30 days). Cows were given daily injections of rbST, Sometribove, USAN (25mg/day; 6 cows each study) or saline (control; 6 cows each study). During on-farm periods, blood and milk (am and pm) samples were collected once weekly. During CC periods, blood samples were collected every 2 days and milk samples (am and pm) were collected daily. Plasma IGF-I and IGF-II were increased in cows treated with rbST. A pronounced seasonal pattern in basal and rbST-stimulated plasma IGF-I but not IGF-II was detected. Higher basal and rbST-stimulated plasma IGF-I concentrations in S occurred despite large decreases in feed intake and energy balance. Milk IGF-I and IGF-II was not affected by rbST treatment or season. Although milk IGF-I and IGF-II concentrations were unaffected by rbST treatment, total IGF-output increased due to increased milk yield. The observed seasonal patterns in plasma IGF-I may be indicative of seasonal differences in the coupling of the Somatotropin-IGF axis. In particular, we failed to detect an uncoupling of the Somatotropin-IGF-I axis in S despite an induced negative energy balance during thermal stress.
Maestá, Sirlei Aparecida - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of recombinant bovine Somatotropin (rbST) on non-carcass components of goat kids of three genotypes
'Universidade Federal de Goias', 2015Co-Authors: Rodrigues Luciana, Gonçalves, Heraldo César, Medeiros, Brenda Batista Lemos, Menezes, Jakilane Jacque Leal, Maestá, Sirlei AparecidaAbstract:This study was developed with the aim of evaluating recombinant bovine Somatotropin (rbST) on non-carcass components of goat kids of three genotypes. It was used 23 male goat kids of three genotypes, being 8 Alpine, 4 ½ Boer + ½ Alpine (½ BA) and 11 ¾ Boer + ¼Alpine (¾ BA), from which 12 received rbST e 11 control. The growth hormone used was the recombinant bovine Somatotropin (rbST) and animals of treatment 1 received the hormone in the amount of 0.3 mg/kg live weight, from 45 days, adjusted in intervals of 14 days. Animals of treatment 2 (control) received saline solution in the same dosage and interval. The ½ BA goats presented a higher proportion of external non-carcass components (head, feet and skin) in relation to Alpine goats. Regarding the vital organs, such as lungs, kidneys and spleen, and the non-carcass components blood, internal fat and perinephric fat, Alpine goats presented higher values than ¾ BA goats. The administration of recombinant bovine Somatotropin (rbST) did not produce effect on proportions and weight of non-carcass components. Proportions and weight of non-carcass components varied in function of genotypes, although animals were slaughtered at similar live weight.Desenvolveu-se o presente estudo com o objetivo de avaliar a Somatotropina bovina recombinante (rbST) nos não-componentes da carcaça de cabritos de três genótipos. Foram utilizados 23 machos inteiros de três genótipos, sendo oito Alpino (A), quatro ½ Boer + ½ Alpino (½ BA) e 11 ¾ Boer + ¼ Alpino (¾ BA), dos quais 12 receberam rbSTe 11controle. O hormônio de crescimento utilizado foi a Somatotropina recombinante bovina (rbST) e os animais do tratamento 1 receberam o hormônio na quantidade de 0,3 mg/kg de peso vivo, a partir dos 45 dias, ajustada em intervalos de 14 dias. Os animais do tratamento 2 (controle) receberam solução salina na mesma dosagem e intervalo. Os animais ½ BA apresentaram uma maior proporção dos não-componentes externos (cabeça, patas e pele) em relação aos da raça Alpina. Em relação aos órgãos vitais, como pulmão, rins e baço, e aos não-componentes sangue, gordura interna e gordura perirenal, os animais da raça Alpina apresentaram maiores valores em relação aos ¾ BA. A administração da Somatotropina bovina recombinante (rbST) não produziu efeito nos não-componentes da carcaça. As proporções e os pesos dos não-componentes da carcaça variaram em função dos genótipos, embora abatidos a pesos vivos semelhantes.14315
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Avaliação da Somatotropina bovina recombinante (rbST) nos não-componentes da carcaça de cabritos de três genótipos
Universidade Federal de Goiás, 2013Co-Authors: Rodrigues Luciana, Gonçalves, Heraldo César, Medeiros, Brenda Batista Lemos, Menezes, Jakilane Jacque Leal, Maestá, Sirlei AparecidaAbstract:This study was developed with the aim of evaluating recombinant bovine Somatotropin (rbST) on non-carcass components of goat kids of three genotypes. It was used 23 male goat kids of three genotypes, being 8 Alpine, 4 ½ Boer + ½ Alpine (½ BA) and 11 ¾ Boer + ¼Alpine (¾ BA), from which 12 received rbST e 11 control. The growth hormone used was the recombinant bovine Somatotropin (rbST) and animals of treatment 1 received the hormone in the amount of 0.3 mg/kg live weight, from 45 days, adjusted in intervals of 14 days. Animals of treatment 2 (control) received saline solution in the same dosage and interval. The ½ BA goats presented a higher proportion of external non-carcass components (head, feet and skin) in relation to Alpine goats. Regarding the vital organs, such as lungs, kidneys and spleen, and the non-carcass components blood, internal fat and perinephric fat, Alpine goats presented higher values than ¾ BA goats. The administration of recombinant bovine Somatotropin (rbST) did not produce effect on proportions and weight of non-carcass components. Proportions and weight of non-carcass components varied in function of genotypes, although animals were slaughtered at similar live weight.Desenvolveu-se o presente estudo com o objetivo de avaliar a Somatotropina bovina recombinante (rbST) nos não-componentes da carcaça de cabritos de três genótipos. Foram utilizados 23 machos inteiros de três genótipos, sendo oito Alpino (A), quatro ½ Boer + ½ Alpino (½ BA) e 11 ¾ Boer + ¼ Alpino (¾ BA), dos quais 12 receberam rbSTe 11controle. O hormônio de crescimento utilizado foi a Somatotropina recombinante bovina (rbST) e os animais do tratamento 1 receberam o hormônio na quantidade de 0,3 mg/kg de peso vivo, a partir dos 45 dias, ajustada em intervalos de 14 dias. Os animais do tratamento 2 (controle) receberam solução salina na mesma dosagem e intervalo. Os animais ½ BA apresentaram uma maior proporção dos não-componentes externos (cabeça, patas e pele) em relação aos da raça Alpina. Em relação aos órgãos vitais, como pulmão, rins e baço, e aos não-componentes sangue, gordura interna e gordura perirenal, os animais da raça Alpina apresentaram maiores valores em relação aos ¾ BA. A administração da Somatotropina bovina recombinante (rbST) não produziu efeito nos não-componentes da carcaça. As proporções e os pesos dos não-componentes da carcaça variaram em função dos genótipos, embora abatidos a pesos vivos semelhantes
Maesta S.a. - One of the best experts on this subject based on the ideXlab platform.
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Evaluation Of Recombinant Bovine Somatotropin (rbst) On Noncarcass Components Of Goat Kids Of Three Genotypes [avaliação Da Somatotropina Bovina Recombinante (rbst) Nos Não-componentes Da Carcaça De Cabritos De Três Genótipos]
2015Co-Authors: Rodrigues L., Goncalves H.c., Medeiros B.b.l., Menezes J.j.l., Maesta S.a.Abstract:This study was developed with the aim of evaluating recombinant bovine Somatotropin (rbST) on non-carcass components of goat kids of three genotypes. It was used 23 male goat kids of three genotypes, being 8 Alpine, 4 1/2 Boer + 1/2 Alpine (1/2 BA) and 11 3/4 Boer + 1/4Alpine (3/4 BA), from which 12 received rbST e 11 control. The growth hormone used was the recombinant bovine Somatotropin (rbST) and animals of treatment 1 received the hormone in the amount of 0.3 mg/kg live weight, from 45 days, adjusted in intervals of 14 days. Animals of treatment 2 (control) received saline solution in the same dosage and interval. The 1/2 BA goats presented a higher proportion of external non-carcass components (head, feet and skin) in relation to Alpine goats. Regarding the vital organs, such as lungs, kidneys and spleen, and the noncarcass components blood, internal fat and perinephric fat, Alpine goats presented higher values than 3/4 BA goats. The administration of recombinant bovine Somatotropin (rbST) did not produce effect on proportions and weight of non-carcass components. Proportions and weight of non-carcass components varied in function of genotypes, although animals were slaughtered at similar live weight
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Evaluation Of Recombinant Bovine Somatotropin (rbst) On Noncarcass Components Of Goat Kids Of Three Genotypes [avaliação Da Somatotropina Bovina Recombinante (rbst) Nos Não-componentes Da Carcaça De Cabritos De Três Genótipos]
2015Co-Authors: Rodrigues L., Goncalves H.c., Medeiros B.b.l., Menezes J.j.l., Maesta S.a.Abstract:This study was developed with the aim of evaluating recombinant bovine Somatotropin (rbST) on non-carcass components of goat kids of three genotypes. It was used 23 male goat kids of three genotypes, being 8 Alpine, 4 1/2 Boer + 1/2 Alpine (1/2 BA) and 11 3/4 Boer + 1/4Alpine (3/4 BA), from which 12 received rbST e 11 control. The growth hormone used was the recombinant bovine Somatotropin (rbST) and animals of treatment 1 received the hormone in the amount of 0.3 mg/kg live weight, from 45 days, adjusted in intervals of 14 days. Animals of treatment 2 (control) received saline solution in the same dosage and interval. The 1/2 BA goats presented a higher proportion of external non-carcass components (head, feet and skin) in relation to Alpine goats. Regarding the vital organs, such as lungs, kidneys and spleen, and the noncarcass components blood, internal fat and perinephric fat, Alpine goats presented higher values than 3/4 BA goats. The administration of recombinant bovine Somatotropin (rbST) did not produce effect on proportions and weight of non-carcass components. Proportions and weight of non-carcass components varied in function of genotypes, although animals were slaughtered at similar live weight.142143150Amin, M.R., Husain, S.S., Islam, A.B.M.M., Evaluation of Black Bengal goats and their cross with the Jamunapari breed for carcass characteristics (2000) Small Ruminant Research, 38, pp. 211-215Cameron, M.R., Luo, J., Sahlu, T., Hart, S.P., Coleman, S.W., Goetsch, A.L., Growth and slaughter traits of Boer x Spanish, Boer x Angora, and Spanish goats consuming a concentrate-baseddiet 24-7-89 (2001) Journal of Animal Science, 79, pp. 1423-1430Carvalho, P.A., Sanchez, L.M.B., Viégas, J., Velho, J.P., Jauris, G.C., Rodrigues, M.B., Componentes do peso vivo e órgãos viscerais de bezerros machos de origem leiteira ao nascimento, 50 e 110 dias de vida (2003) Revista Brasileira de Zootecnia, 32 (6), pp. 1469-1475Coleman, S.W., Evans, B.C., Guenther, J.J., Body and carcass composition of Angus and Charolais steers as affected by age and nutrition. (1993) Journal of Animal Science, 71 (1), pp. 86-95Costa, R.G., Pimenta Filho, E.C., Moreira, R.T., Rodrigues, A., Rendimento de carcaça e vísceras em caprinos mestiços Anglo-Nubianos. (1990) Agropecuária Técnica, 1 (1-2), pp. 1-8Delfa, R., Gonzales, C., Teixeira, A., El "quinto quarto" (1991) Revista Ovis., (17), pp. 49-66Dhanda, J.S., Taylor, D.G., Mccosker, J.E., Murray, P.J., The influence of goat genotype on the production of Capretto and Chevon carcasses. 1.Growth and carcass characteristics (1999) Meat Science, 52, pp. 355-361Early, R.J., Mcbride, B.W., Ball, R.O., Growth and metabolism in Somatotropin-treated steers: II. Carcass and noncarcass tissue components and chemical composition (1990) Journal of Animal Science, 68, pp. 4144-4152Faturi, C., Restle, J., Brondani, I.L., Silva, J.H.S., Arboitte, M.Z., Carrilho, C.O., Peixoto, L.A.O., Características da carcaça e da carne de novilhos de diferentes grupos genéticos alimentados em confinamento com diferentes proporções de grão de aveia e grão de sorgo no concentrado (2002) Revista Brasileira de Zootecnia, 31 (5), pp. 2024-2035Ferrel, C.L., Garret, W.N., Hinman, N., Estimation of body in pregnant and non pregnant heifers (1976) Journal of Animal Science, 42, pp. 1158-1166Gallo, C., Le Breton, Y., Wainnright, I., Berkhoff, M., Body and carcass composition of male and female Criollo goats in the South of Chile (1996) Small Ruminant Research, 23, pp. 163-169Gibb, M.J., Cook, J.E., Treacher, T.T., Performance of British Saanen, Boer x British Saanen and Anglo-Nubian castrated male kids from 8 weeks to slaughter at 28, 33 or 38 kg live weight (1993) Animal Production, 57, pp. 263-271Jorge, A.M., Fontes, C.A.A., Desenvolvimento relativo das partes do corpo de zebuínos de quatro raças. (2000) Ciência Rural, 31 (5), pp. 857-881Kirton, A.H., Carter, A.H., Clarcke, J.N., Sinclair, D.P., Mercer, G.J.K., Duganzich, D.M., A comparison between 15 ram breeds for export lamb production. 1. Live weights, body components, carcass measurements and compositions (1995) New Zealand Journal of Agricultural Research, 38, pp. 347-360Kosum, N., Alcicek, A., Taskin, T., Önenç, A., Fattening performance and carcass characteristics of Saanen and Bornova male kids under an intensive management system (2003) Czech Journal of Animal Science, 48 (9), pp. 379-386Mattos, C.W., Carvalho, F.F.R., Dutra Júnior, W.M., Véras, A.S.C., Batista, A.M.V., Alves, K.S., Ribeiro, V.L., Miranda, S.B., Características de carcaça e dos componentes não-carcaça de cabritos Moxotó e Canindé submetidos a dois níveis de alimentação (2006) Revista Brasileira de Zootecnia, 35 (5), pp. 2125-2134Menezes, J.J.L., Gonçalves, H.C., Ribeiro, M.S., Rodrigues, L., Cañizares, G.I.L., Medeiros, B.B.L., Efeitos do sexo, do grupo racial e da idade ao abate nas características de carcaça e maciez da carne de caprinos (2009) Revista Brasileira de Zootecnia, 38 (9), pp. 1769-1778Missio, R.L., Brondani, I.L., Restle, J., Silva, J.H.S., Silveira, M.F., Silva, V.S., Partes nãointegrantes da carcaça de tourinhos alimentados com diferentes níveis de concentrado na dieta (2009) Revista Brasileira de Zootecnia, 38 (5), pp. 906-915(2001), p. 387. , NATIONAL RESEARCH COUNCIL-NRC 2001. Nutrient Requirements of Dairy Cattle. 7.ed. Washington: National Academic PressOsório, J.C., Jardim, P.O., Pimentel, M., Pouey, J., Lüder, W.E., Ávila, C.J., Componentes do peso vivo em cordeiros da raça Corriedale (1996) Ciência Rural, 26 (3), pp. 483-487Peña, F., Perea, J., García, A., Acero, R., Effects of weight at slaughter and sex on the carcass characteristics of Florida suckling kids (2007) Meat Science, 75, pp. 543-550Perez, P., Maino, M., Morales, M.S., Soto, A., Effect of goat and milk substitutes and sex on productive parameters and carcass composition of Creole kids (2001) Small Ruminant Research, 42, pp. 87-93Peron, A.J., Fontes, C.A.A., Lana, R.P., Silva, D.J., Queiroz, A.C., Paulino, M.F., Tamanho dos órgãos internos e distribuição da gordura corporal em novilhos de cinco grupos genéticos, submetidos à alimentação restrita e "ad libitum" (1993) Revista Brasileira de Zootecnia, 22 (5), pp. 813-819Potchoiba, M.J., Lu, C.D., Pinkerton, F., Sahlu, T., Effects of all-milk diet on weight gain, organ development, carcass characteristics and tissue composition, including fatty acids and cholesterol contents, of growing male goats (1990) Small Ruminant Research, 3, pp. 583-592Silva Sobrinho, A.G., Gastaldi, K.A., Garcia, C.A., Machado, M.R.F., Diferentes dietas e pesos ao abate na produção de órgãos de cordeiros (2003) Revista Brasileira de Zootecnia, 32 (6 SUPL. 1), pp. 1792-1799Silva, D.J., Queiroz, A.C., Análise de alimentos-Métodos químicos e biológicos (2002), p. 235. , Viçosa: Universidade Federal de ViçosaSkarda, J., Effects of bovine growth hormone on growth, organ weights, tissue composition and adipose tissue metabolism in young castrated male goats (1998) Livestock Production Science, 55, pp. 215-225Skinner, J.D., Utilization of the Boer goat for intensive animal production (1972) Tropical Animal Health and Production, 4, pp. 120-128Sniffen, C.J., O'connor, D.G., Van Soest, P.J., Fox, D.G., Russell, J.B., A net carbohydrate and protein system for evaluating cattle diets: II Carbohydrate and protein avaibility (1992) Journal of Animal Science, 70, pp. 3562-3577Solis, J.C., Byers, F.M., Schelling, G.T., Long, C.R., Greene, L.W., Maintenance requirements and energetic efficiency of cows of different breed types (1988) Journal of Animal Science, 66, pp. 764-773Thompson, W.R., Meiske, J.C., Goodrich, R.D., Rust, J.R., Byers, F.M., Influence of body composition on energy requirements of beef cows during winter (1983) Journal of Animal Science, 56 (5), pp. 1241-1252Tonetto, C.J., Pires, C.C., Müller, L., Rocha, C.G., Silva, J.H.S., Frescura, R.B.M., Kippert, C.J., Rendimentos de cortes da carcaça, características da cerne e componentes do peso vivo em cordeiros terminados em três sistemas de alimentação (2004) Revista Brasileira de Zootecnia, 33 (1), pp. 234-241(2000), p. 142. , UNIVERSIDADE FEDERAL DE VIÇOSA-UFV. Sistema de análises estatísticas e genéticas -SAEG. Versão 8.0. ViçosaZainuir, A.S., Tassell, R., Kellaway, R.C., Dodemaide, W.R., Recombinant growth hormone in growing lambs: effects on growth, feed utilization, body and carcass characteristics on wool growth (1989) Australian Journal of Agricultural Research, 40, pp. 195-20
R J Collier - One of the best experts on this subject based on the ideXlab platform.
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effects of recombinant bovine Somatotropin rbst and season on plasma and milk insulin like growth factors i igf i and ii igf ii in lactating dairy cows
Domestic Animal Endocrinology, 2008Co-Authors: R J Collier, M A Miller, C L Mclaughlin, H D Johnson, Clifton A BaileAbstract:During two studies, effects of recombinant bovine Somatotropin (rbST) on plasma and milk IGF's in cows adapted to summer (S; 12 cows) or winter (W; 12 cows) conditions were evaluated. Each study consisted of on-farm periods (30 days) followed by climatology chamber periods (CC; 30 days). Cows were given daily injections of rbST, Sometribove, USAN (25mg/day; 6 cows each study) or saline (control; 6 cows each study). During on-farm periods, blood and milk (am and pm) samples were collected once weekly. During CC periods, blood samples were collected every 2 days and milk samples (am and pm) were collected daily. Plasma IGF-I and IGF-II were increased in cows treated with rbST. A pronounced seasonal pattern in basal and rbST-stimulated plasma IGF-I but not IGF-II was detected. Higher basal and rbST-stimulated plasma IGF-I concentrations in S occurred despite large decreases in feed intake and energy balance. Milk IGF-I and IGF-II was not affected by rbST treatment or season. Although milk IGF-I and IGF-II concentrations were unaffected by rbST treatment, total IGF-output increased due to increased milk yield. The observed seasonal patterns in plasma IGF-I may be indicative of seasonal differences in the coupling of the Somatotropin-IGF axis. In particular, we failed to detect an uncoupling of the Somatotropin-IGF-I axis in S despite an induced negative energy balance during thermal stress.
Rodrigues Luciana - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of recombinant bovine Somatotropin (rbST) on non-carcass components of goat kids of three genotypes
'Universidade Federal de Goias', 2015Co-Authors: Rodrigues Luciana, Gonçalves, Heraldo César, Medeiros, Brenda Batista Lemos, Menezes, Jakilane Jacque Leal, Maestá, Sirlei AparecidaAbstract:This study was developed with the aim of evaluating recombinant bovine Somatotropin (rbST) on non-carcass components of goat kids of three genotypes. It was used 23 male goat kids of three genotypes, being 8 Alpine, 4 ½ Boer + ½ Alpine (½ BA) and 11 ¾ Boer + ¼Alpine (¾ BA), from which 12 received rbST e 11 control. The growth hormone used was the recombinant bovine Somatotropin (rbST) and animals of treatment 1 received the hormone in the amount of 0.3 mg/kg live weight, from 45 days, adjusted in intervals of 14 days. Animals of treatment 2 (control) received saline solution in the same dosage and interval. The ½ BA goats presented a higher proportion of external non-carcass components (head, feet and skin) in relation to Alpine goats. Regarding the vital organs, such as lungs, kidneys and spleen, and the non-carcass components blood, internal fat and perinephric fat, Alpine goats presented higher values than ¾ BA goats. The administration of recombinant bovine Somatotropin (rbST) did not produce effect on proportions and weight of non-carcass components. Proportions and weight of non-carcass components varied in function of genotypes, although animals were slaughtered at similar live weight.Desenvolveu-se o presente estudo com o objetivo de avaliar a Somatotropina bovina recombinante (rbST) nos não-componentes da carcaça de cabritos de três genótipos. Foram utilizados 23 machos inteiros de três genótipos, sendo oito Alpino (A), quatro ½ Boer + ½ Alpino (½ BA) e 11 ¾ Boer + ¼ Alpino (¾ BA), dos quais 12 receberam rbSTe 11controle. O hormônio de crescimento utilizado foi a Somatotropina recombinante bovina (rbST) e os animais do tratamento 1 receberam o hormônio na quantidade de 0,3 mg/kg de peso vivo, a partir dos 45 dias, ajustada em intervalos de 14 dias. Os animais do tratamento 2 (controle) receberam solução salina na mesma dosagem e intervalo. Os animais ½ BA apresentaram uma maior proporção dos não-componentes externos (cabeça, patas e pele) em relação aos da raça Alpina. Em relação aos órgãos vitais, como pulmão, rins e baço, e aos não-componentes sangue, gordura interna e gordura perirenal, os animais da raça Alpina apresentaram maiores valores em relação aos ¾ BA. A administração da Somatotropina bovina recombinante (rbST) não produziu efeito nos não-componentes da carcaça. As proporções e os pesos dos não-componentes da carcaça variaram em função dos genótipos, embora abatidos a pesos vivos semelhantes.14315
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Avaliação da Somatotropina bovina recombinante (rbST) nos não-componentes da carcaça de cabritos de três genótipos
Universidade Federal de Goiás, 2013Co-Authors: Rodrigues Luciana, Gonçalves, Heraldo César, Medeiros, Brenda Batista Lemos, Menezes, Jakilane Jacque Leal, Maestá, Sirlei AparecidaAbstract:This study was developed with the aim of evaluating recombinant bovine Somatotropin (rbST) on non-carcass components of goat kids of three genotypes. It was used 23 male goat kids of three genotypes, being 8 Alpine, 4 ½ Boer + ½ Alpine (½ BA) and 11 ¾ Boer + ¼Alpine (¾ BA), from which 12 received rbST e 11 control. The growth hormone used was the recombinant bovine Somatotropin (rbST) and animals of treatment 1 received the hormone in the amount of 0.3 mg/kg live weight, from 45 days, adjusted in intervals of 14 days. Animals of treatment 2 (control) received saline solution in the same dosage and interval. The ½ BA goats presented a higher proportion of external non-carcass components (head, feet and skin) in relation to Alpine goats. Regarding the vital organs, such as lungs, kidneys and spleen, and the non-carcass components blood, internal fat and perinephric fat, Alpine goats presented higher values than ¾ BA goats. The administration of recombinant bovine Somatotropin (rbST) did not produce effect on proportions and weight of non-carcass components. Proportions and weight of non-carcass components varied in function of genotypes, although animals were slaughtered at similar live weight.Desenvolveu-se o presente estudo com o objetivo de avaliar a Somatotropina bovina recombinante (rbST) nos não-componentes da carcaça de cabritos de três genótipos. Foram utilizados 23 machos inteiros de três genótipos, sendo oito Alpino (A), quatro ½ Boer + ½ Alpino (½ BA) e 11 ¾ Boer + ¼ Alpino (¾ BA), dos quais 12 receberam rbSTe 11controle. O hormônio de crescimento utilizado foi a Somatotropina recombinante bovina (rbST) e os animais do tratamento 1 receberam o hormônio na quantidade de 0,3 mg/kg de peso vivo, a partir dos 45 dias, ajustada em intervalos de 14 dias. Os animais do tratamento 2 (controle) receberam solução salina na mesma dosagem e intervalo. Os animais ½ BA apresentaram uma maior proporção dos não-componentes externos (cabeça, patas e pele) em relação aos da raça Alpina. Em relação aos órgãos vitais, como pulmão, rins e baço, e aos não-componentes sangue, gordura interna e gordura perirenal, os animais da raça Alpina apresentaram maiores valores em relação aos ¾ BA. A administração da Somatotropina bovina recombinante (rbST) não produziu efeito nos não-componentes da carcaça. As proporções e os pesos dos não-componentes da carcaça variaram em função dos genótipos, embora abatidos a pesos vivos semelhantes
