Calving Rate
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Inflammation: friend or foe of bovine reproduction?
Abstract Inflammation is not only the first line of defense of the organism but is also required in many reproductive processes such as ovulation, corpus luteum development, luteolysis, uterine clearance after insemination and post partum. Nevertheless, if excessive or persistent, inflammation can switch from a positive mechanism to a deleterious process, im
Anim. Reprod.. Publicado em: 28/11/2019
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2. Association between gestation length and lactation performance, lactation curve, calf birth weight and dystocia in Holstein dairy cows in Iran
Abstract In this study, 252,798 lactations on 108,077 cows in 433 herds were used to determine the association between gestation length (GL) and lactation performance, lactation curve, calf birth weight and dystocia in Holstein dairy cows in Iran. The GL averaged 278.1 ± 5.41 d, was categorized as short (SGL; at 1 SD below the population mean), average (AGL
Anim. Reprod.. Publicado em: 25/11/2019
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3. Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options
ABSTRACT Traditional livestock productivity is hard to estimate, since it depends on a gamut of animal production indicators that are difficult to measure for many farms. Thus, we propose an analytical method for estimating productivity and understanding the importance of animal production indicators under different full-cycle cattle production systems in Br
Sci. agric. (Piracicaba, Braz.). Publicado em: 04/11/2019
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4. Maternal, fetal and neonatal heart rate and heart rate variability in Holstein cattle
RESUMO: O objetivo deste estudo foi descrever os valores normais para os índices de frequência cardíaca (FC) materna, fetal e neonatal e de variabilidade da frequência cardíaca (VFC) no domínio do tempo (desvio padrão do intervalo batimento a batimento, SDNN; raiz quadrada média de sucessivas diferenças de batimento a batimento, RMSSD) e do domínio
Pesq. Vet. Bras.. Publicado em: 02/05/2019
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5. Genetic and environmental variance and covariance parameters for some reproductive traits of Holstein and Jersey cattle in Antioquia (Colombia)
The objective of this study was to estimate the genetic, phenotypic and environmental parameters for calving interval (CI), days open (DO), number of services per conception (NSC) and conception rate (CR) in Holstein and Jersey cattle in Antioquia (Colombia). Variance and covariance component estimates were obtained by an animal model that was solved using t
R. Bras. Zootec.. Publicado em: 2014-03
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6. Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle
The objective of this study was to estimate heritability and verify the genetic correlations between heifers subsequent rebreeding with weaning hip height (WHH) and yearling hip height (YHH), using Bayesian inference. The (co)variance components and genetic parameters were estimated using an animal nonlinear (threshold) model for subsequent rebreeding and an
Revista Brasileira de Zootecnia. Publicado em: 2012-03
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7. Effect of prostaglndin F2 administered before estrus synchronization with norgestomet and estradiol valerate on calving rates of beef cows.
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Journal of Animal Science. Publicado em: 2011
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8. Body condition score to predict the postpartum fertility of crossbred beef cows
The relationship between changes in body condition score (BCS) during the postpartum and fertility in beef cows suckling calves under extensive conditions were investigated. Cows were subjected to four BCS evaluations over the postpartum period, starting around one month after calving. In the second evaluation cows were treated with medroxy-progesterone acet
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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9. Estimativas das probabilidades de reconcepção em matrizes no Pantanal da Nhecolândia.
O objetivo deste estudo foi estimar a probabilidade de reconcepção em matrizes criadas na sub-região da Nhecolândia em função do mês de parição e condições climáticas no período de fecundação. The aim of this study was to estimate the probability of reconception in cows reared in the Nhecolândia sub-region, according to the month of calving a
SIMPÓSIO SOBRE RECURSOS NATURAIS E SOCIOECONÔMICOS DO PANTANAL. Publicado em: 2011
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10. Utilização de subproduto de caju (Anacardium occidentale) no desempenho reprodutivo e produtivo de ovinos criados no Nordeste do Brasil. / Use of a byproduct of cashew (Anacardium occidentale) in reproductive and productive performance of sheep raised in Northeast Brazil.
The objectives were: 1) assess the reproductive responses of ewes fed increasing levels of dehydrated cashew apple pomace (25, 50 and 75%-BCD) during the mating period, 2) check the return to cyclicity in sheep fed postpartum period prescribed in the diet include BCD, 3) assess body development and puberty age of lambs fed 50% inclusion of BCD diet, and 4) t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2010
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11. Histogramas de parição e o desempenho reprodutivo de vacas de corte
A distribuição dos partos em vacas de corte, durante a estação de parição, está relacionada com o desempenho reprodutivo final do rebanho de cria, sendo um dos principais fatores a influenciar na rentabilidade do sistema de produção no sul do Brasil. O objetivo do presente trabalho foi avaliar o efeito do histograma de parição (HP) sobre a taxa de
Publicado em: 2010
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12. SUPLEMENTAÇÃO COM SAIS DE CÁLCIO DE ÁCIDOS GRAXOS PARA VACAS DE CORTE MANTIDAS EM PASTAGEM NATURAL DURANTE O PERÍODO PRÉ E/OU PÓS-PARTO / SUPPLEMENTATION WITH CALCIUM SALTS OF FATTY ACIDS TO BEEF COWS MAINTENEID ON NATIVE PASTURE DURING TO PERIOD PRE AND/OUR POSTPARTUM
The objective of this study was to evaluate whether supplementation with calcium salts of fatty acids (CSFA) during to pre and/our postpartum affects production and composition of milk, metabolites blood, productive and reproductive performance from beef cows of different genetic groups maintained on native pasture, and performance of this calves. Were used
Publicado em: 2010