valores econômicos para habilidade de permanência e probabilidade de prenhez aos 14 meses em bovinos de corte economic value for stayability and heifer pregnancy at 14 months in beef cattle herds
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2005
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Abstract
Estimaram-se os valores econômicos para as características reprodutivas de probabilidade de prenhez aos 14 meses (PP14) e habilidade de permanência (HP). Foram simulados dados de uma propriedade pecuária de corte, especializada na fase de cria para aplicação de modelagem bioeconômica. A PP14 foi avaliada considerando taxas percentuais crescentes de prenhez de novilhas aos 14 meses de idade, e a HP foi avaliada a partir da diminuição da taxa de descarte de vacas. O valor econômico da PP14 foi estimado em R$695,97 por unidade percentual de prenhez de novilhas aos 14 meses, avaliada para o sistema produtivo, enquanto o valor econômico da HP variou em função do custo de compra da novilha de reposição. Os valores, avaliados por unidade percentual de diminuição na taxa de descarte de vacas, foram de R$-2.140,00, R$-140,00 e R$2.860,00 para o custo de compra da novilha de R$500,00, R$700,00 e R$1.000,00, respectivamente. Os valores econômicos negativos para HP indicaram que o valor de descarte da vaca superou o custo de compra da novilha. Quanto maior for o valor investido na reposição de novilhas maior será a importância econômica do HP.
Economic values for two reproductive traits, percentage of heifers pregnant at 14 months of age (PP14) and stayability (HP), were estimated using simulated bioeconomic modeling data for a cow-calf production system. Changes in HP were modeled as decreases in percentage of annual culling of cows. The economic value of PP14 was R$695.97 per one unit increase in percentage of heifers pregnant at 14 months of age, while the economic value of HP varied according to the simulated cost of replacement heifers. Economic values per unit decrease in cow culling percentage were R$-2,140.00, R$-140.00 and R$2,860.00 for heifer prices of R$500, R$700 and R$1,000, respectively. Economic values for HP were negative when the salvage value of a cull cow was higher than the cost of a replacement heifer. Thus higher investment for replacement heifers increases the importance of stayability in a cattle herd.
Economic values for two reproductive traits, percentage of heifers pregnant at 14 months of age (PP14) and stayability (HP), were estimated using simulated bioeconomic modeling data for a cow-calf production system. Changes in HP were modeled as decreases in percentage of annual culling of cows. The economic value of PP14 was R$695.97 per one unit increase in percentage of heifers pregnant at 14 months of age, while the economic value of HP varied according to the simulated cost of replacement heifers. Economic values per unit decrease in cow culling percentage were R$-2,140.00, R$-140.00 and R$2,860.00 for heifer prices of R$500, R$700 and R$1,000, respectively. Economic values for HP were negative when the salvage value of a cull cow was higher than the cost of a replacement heifer. Thus higher investment for replacement heifers increases the importance of stayability in a cattle herd.
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formigoni2005arquivovalores
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| Authors | ;I.B. Formigoni;J.B.S. Ferraz;J.A.II.V. Silva;J.P. Eler;R.C. Brumatti |
| Journal | Environmental research |
| Year | 2005 |
| DOI |
10.1590/S0102-09352005000800013
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