2005
DOI: 10.1590/s1516-35982005000600026
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Peso vivo final, ganho de peso, características de carcaça e concentrações plasmáticas de IGF-I e hormônios tireoideanos de bezerros mestiços Angus-Nelore recebendo somatotropina bovina recombinante (rbST) até a desmama

Abstract: RESUMO -Objetivando estudar o efeito da somatotropina bovina recombinante (rbST) sobre o desempenho, as características de carcaça e as concentrações plasmáticas de IGF-I e hormônios tireoideanos, 36 bezerros mestiços ½ Angus-Nelore com idade de 63 ± 17 dias e pesando 76,8 ± 14,7 kg, criados em pastagens de Brachiaria decumbens e suplementados em creep feeding, foram submetidos a dois tratamentos até a desmama (217 dias): I) 18 bezerros receberam 1,4 mg/kg de rbST (Boostin ® ) a cada 14 dias; II) 18 bezerros c… Show more

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Cited by 7 publications
(9 citation statements)
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References 39 publications
(68 reference statements)
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“…Concentration of IGF-I during the restriction and ad libitum feed periods for T60: 60 g Dry Matter Intake/kg Body Weight 0.75 , T75: 75 g Dry Matter Intake/kg Body Weight 0.75 or TAL: ad libitum intake. al., 1989;HAYDEN et al, 1993;HORNICK et al, 1998), as by the effect of breed (CABARAUX et al, 2005).…”
Section: Discussionmentioning
confidence: 99%
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“…Concentration of IGF-I during the restriction and ad libitum feed periods for T60: 60 g Dry Matter Intake/kg Body Weight 0.75 , T75: 75 g Dry Matter Intake/kg Body Weight 0.75 or TAL: ad libitum intake. al., 1989;HAYDEN et al, 1993;HORNICK et al, 1998), as by the effect of breed (CABARAUX et al, 2005).…”
Section: Discussionmentioning
confidence: 99%
“…IGF-I is considered to be an important mediator of metabolic action and stimulus to growth, provided by somatotropin, correlating positively with the rate of live weight gain and feed efficiency (CERVIERI et al, 2005), indicating that the growth rates obtained were not sufficiently different to express the negative correlation between the circulating IGF-I concentration and the growth rate (SCANES, 2003).…”
Section: Discussionmentioning
confidence: 99%
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“…maior deposição é o tecido muscular. Após atingir a puberdade, de modo geral, há aumento na deposição de tecido adiposo, e proporcional redução tanto de ossos quanto de músculos, refletindo em pior conversão alimentar, ou seja, o animal necessita de mais alimento para ganhar peso, resultando em menores ganhos de peso (Cervieri et al, 2005). Esse efeito pode ter ocorrido ainda, devido à pesagem na pós-desmama estar sendo realizada muito próxima da pesagem na desmama para alguns animais e para outros com intervalos maiores, de até 300 dias.…”
Section: Figura 2 Valores Estimados Para Conformação (Cs) Precocidaunclassified
“…Thus, the maximum rate of growth occurs Table 7 -Descriptive levels of probability for error type I (P-value) associated to effects evaluated for ultrasound measurements of longissimus muscle area (LMA), rib fat thickness (RFT) and rump fat thickness (P8) in different periods, as those tissues present differences in growth and development. During the animal growth the muscle deposition increases quickly due to the release of growth protein hormones (Cervieri et al, 2005). At puberty, the muscle tissue reaches the maximum growth and decreases until reaching the plateau at maturity.…”
Section: Ad Libitummentioning
confidence: 99%