01582naa a2200253 a 450000100080000000500110000800800410001910000210006024500640008126000090014550000870015452007860024165000220102765000160104965000210106565000240108665000180111065000220112865300250115065300190117570000250119470000170121977300920123611088642018-11-21       2002    bl uuuu     u00u1 u    #d1 aSERENO, J. R. B.  aReduction of the bullbcow ratio in the Brazilian Pantanal.  c2002  aTítulo em português: Redução da proporção touro:vaca no Pantanal brasileiro.  aThis work was conducted to study alternatives for reduction of the bull:cow ratio in the Brazilian lowland and, therefore, lower the production costs for the local beef cattle industry. The ratios 1:10, 1:25, and 1:40 were used in native pastures with a mean stocking rate of 0.27 mature animal unit per hectare over two consecutive breeding seasons. Statistical analysis did not show any effect (P&gt0.05) of year (P = 0.2097), animal category (P = 0.0773), bull:cow ratio (0.8134) on reproductive performance. However, the pregnancy rate in a multiple bull system was higher (P = 0.0228) than in the individual bull system. An evaluation of the economic impact of this management system in the extensive Lowland herds showed that at the ratio of 1:10 the bulls were sub utilized.  aanimal production  abeef cattle  aproduction costs  aCusto de Produção  aGado de Corte  aProdução Animal  alivestock management  amanejo de gado1 aSILVA, E. V. da C. e1 aMORES, C. M.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 37, n. 12, p. 1811-1817, dez. 2002