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| Registros recuperados: 23 | |
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| Caballero Cervantes, Yesenia. |
| El principal problema de salud en becerras de reemplazo son las diarreas provocadas por Escherichia coli enterotóxica. El uso de microorganismos pertenecientes al grupo de bacterias ácido lácticas (BAL) en la etapa de lactancia es benéfico para combatir la incidencia de diarreas e incrementar la ganancia de peso. Sin embargo, se ha reportado inconsistencia en los efectos benéficos de los productos comerciales. Por lo anterior, el objetivo de este estudio fue aislar y seleccionar BAL con potencial probiótico de mucosa oral de becerros lactantes, calostro y leche de vacas Holstein que puedan ser consideradas para el suministro de becerras en México. Para ello, se realizó el aislamiento en caldo Man Rogosa Sharp (MRS) y en agar MRS para la obtención de... |
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Palavras-chave: Becerras; Lactobacillus; Cepas; Resistencia; Heifers; Strains; Resistance; Ganadería; Maestría. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2358 |
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| OLIVEIRA JUNIOR, J. S. de; SILVA, G. M. da; MOREIRA, E. M.; ANDRADE, J. de S.; NUNES, V. R. R.; MOROTTI, F.; ANDRADE, E. R.; SENEDA, M. M.; PFEIFER, L. F. M.. |
| This study aimed to establish the relationship between antral follicle count (AFC), the time of puberty, and ovarian response in Nelore heifers subjected to timed-AI (TAI) protocols. Prepubescent Nelore heifers (Bos indicus; n = 30) were examined by transrectal ultrasound and videos of the ovaries were recorded for later CFA (? 3 mm). After AFC, heifers were divided into 2 groups, low and high AFC and then further ultrasonic ovarian assessments were performed to determine the onset of puberty. Once puberty was established in all heifers, they were submitted to an FTAI protocol. There were no differences (P > 0.1) between groups on the time of puberty, ovulation rate, the proportion of heifers that expressed estrus, and on preovulatory follicle diameter.... |
| Tipo: Artigo de periódico |
Palavras-chave: Folículos antrais; Antral follicles.; Gado Nelore; Ovulação; Melhoramento Genético Animal.; Novilho de Corte; Reprodução Animal; Ciclo Estral; Animal breeding.; Estrous cycle; Ovulation; Nellore; Heifers; Animal reproduction. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1143673 |
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| CARDOSO, C. J. T; OLIVEIRA JUNIOR, J. S. de; KISCHEL, H.; SILVA, W. A. L da; ARRUDA, E. D. da S.; CÁCERES, M. B. S.; OLIVEIRA, F. A. M. de; NOGUEIRA, E.; NOGUEIRA, G. de P.; STERZA, F. de A. M.. |
| Antral follicular population (AFP) and antiMüllerian hormone (AMH) concentration are strongly associated. Thus, analyzing AMH concentration is a reliable method to predict animals with high AFP, an important feature to select donor cows for embryos and oocytes. However, not much is known about this parameter in heifers, particularly in crossbred animals. The aim of this study was to assess AFP in heifers and cows and its relation to serum AMH levels. Bos taurus indicus cows (36-60-months-old; n = 30) and heifers (12-14-months-old; n = 17) of the same breed were evaluated. A single procedure of follicular counting was performed by ultrasound for each animal. Random sampling was performed to analyze serum AMH concentration. Cows showed higher AFP than... |
| Tipo: Separatas |
Palavras-chave: Novilho; Bovino; Controle Hormonal; Heifers; Cattle; Hormones. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1090652 |
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| ABREU, U. G. P. de; TOMICH, T. R.; FIGLIOLINI, H. J.; DOMINGOS, I. T.. |
| Foi avaliado o desempenho pós-desmama de 309 bovinos orgânicos criados em pastagens nativas do Pantanal dos Paiaguás. Cento e dezesseis (116) novilhas e cento e vinte e um (121) novilhos foram desmamados e suplementados no período de 07/07/2003 a 30/03/2004 com ração com certificação orgânica, enquanto 36 fêmeas e 36 machos não receberam suplementação. Foram analisadas quatro pesagens durante esse período, utilizando-se modelos mistos com metodologia de estimação de máxima verossimilhança restrita (REML) em esquema multivariado de medida repetida no tempo. As novilhas e os novilhos suplementados e não suplementados pesaram 244,64 ± 29,96 kg e 234,75±15,77 kg; 275,61±40,87 kg e 259,30±22,22 kg, respectivamente. Todo efeito fixo e todas as covariáveis... |
| Tipo: Parte de livro |
Palavras-chave: Novilha; Sistema de produção orgânico; Suplementação; Paiaguás; Organic production system; Supplementation; Novilho; Recria; Pantanal; Heifers; Steers. |
| Ano: 2004 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/811488 |
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| ANDRADE, J. P. N.; GOMEZ-LÉON, V. E.; ANDRADE, F. S.; CARVALHO, B. P.; LACOUTH, K. L.; GARCIA, F. Z.; JACOB, J. C. F.; SALES, J. N. S.; WILTBANK, M. C.; MELLO, M. R. B.. |
| The aim was to develop a program for resynchronization of ovulation (ReBreed21) that allowed reinsemination of non-pregnant Bos indicus heifers every 21 d using timed AI (TAI) without the need for detection of estrus. The Rebreed21 program begins 12 d after previous TAI (Day 0) by inserting an intravaginal P4 implant (Day 12) that is removed 7 d later (Day 19) combined with treatment with 300 IU of eCG. On Day 21, early pregnancy diagnosis (Doppler PD) is performed based on CL vascularity. Nonpregnant (NP) heifers immediately received AI combined with 100 mg of GnRH. The program is replicated 12 d after second TAI to produce a breeding season (BS) of 42 d with 3 potential TAIs. Two experiments were conducted as a proof of concept for this rapid rebreeding... |
| Tipo: Artigo de periódico |
Palavras-chave: ReBreed21; Ressincronização; Resynchronization; Razas zebú; Vaquilla; Cruce de animales; Métodos de mejoramiento genético; Inseminación artificial; Ovulación; Reprodução Animal; Gado Zebu; Bos Indicus; Gado Nelore; Novilho; Inseminação Artificial; Ovulação; Zebu breeds; Nellore; Heifers; Animal breeding; Breeding methods; Artificial insemination; Ovulation. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1124659 |
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| SILVA, G. C.; CARDOSO, C. J. T.; PEREIRA, D. M.; ORTIZ, G. L.; SANTOS, M.; OLIVEIRA, S. S.; SILVA, A. F.; LIMA, A. C. B.; OLIVEIRA, D. P.; GHELLER, J. M.; NOGUEIRA, E.; MELO-STERZA, F. A.. |
| The aim of this study was to evaluate the effects of antral follicles count (AFC), weight and age on the pregnancy rate of Nellore heifers. The experiment was carried out at São Judas Farm, county of Anastácio-MS. A total of 139 PO heifers aged between 13 and 28 month, with a mean weight of 323 ± 43.9 kg, maintained on pasture and considered suitable for reproduction from 275 kg regardless of age, were used. |
| Tipo: Separatas |
Palavras-chave: Antral follicles; Gado Nelore; Prenhez; Nellore; Pregnancy; Heifers. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1100092 |
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| Couto,Victor Rezende Moreira; Paulino,Mário Fonseca; Detmann,Edenio; Valadares Filho,Sebastião de Campos; Sales,Maykel Franklin Lima; Barros,Lívia Vieira de; Porto,Marlos Oliveira; Valente,Ériton Egidio Lisboa. |
| This experiment aimed at evaluating the productive performance, intake and the apparent digestibility in the raising of beef heifers on Brachiaria decumbens Stapf. pastures under supplementation with starch or fibrous energy sources during the dry season. It was used 40 newly weaned heifers (20 Nellore and 20 crossbreed), at 8.5 months of age and 197.9 ± 3.74 kg initial weight. Two supplements were formulated: the first was corn meal- and soybean meal-based diet (high in starch) and the second was based on wheat meal (high in fiber), which were given at the quantities of 0.5 or 1.0 kg/animal/day, compared to the offer of only mineral mixture (control). The animals were distributed according to a complete randomized block design in a 2 × 2 + 1 factorial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria decumbens; Heifers; Pasture; Wheat meal. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001100024 |
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| VALLE, E. R. do; ANDREOTTI, R.; THIAGO, L. R. L. de S.. |
| Na pecuária de corte, a exploração comercial do sistema de cria se constitui na fase do sistema produtivo, que envolve a criação e o manejo não só das matrizes bovinas e seus respectivos bezerros ate a desmama, mas também das novilhas de reposição e dos touros. Esse sistema tem por objetivo a produção de bezerros desmamados que representa a maior fonte de receita do criador. A venda de vacas descartadas e outros animais, apesar de contribuírem para a produção total, e uma fonte de receita marginal. Portanto, a viabilidade do sistema vai depender da eficácia e eficiência com que são utilizados os meios disponíveis para a otimização da produtividade. O escopo deste trabalho foi o de apresentar e discutir as principais praticas de manejo reprodutivo, que... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Bovino de corte; Estacao de monta; Novilha; Sanidade; Eficiência; Calf; Health; Management; Production.; Acasalamento; Bezerro; Desmama; Manejo; Reprodução; Produção; Vaca.; Touro; Beef cattle; Bulls; Heifers; Copulation; Cows; Reproduction; Reproductive performance; Weaning.. |
| Ano: 1998 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/321581 |
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| LEMES, A. P.; GIMENES, L. U.; MARCONDES, C. R.; ESTEVES, S. N.; VILAS BOAS, D. F.; MIGUEL, M. C. V.; ROMANELLO, N.; VOLANTE, C. A.; GARCIA, A. R.. |
| Publicado: Proceedings of the 29th Annual Meeting of the Brazilian Embryo Technology Society (SBTE); Gramado, RS, Brazil, August 20th to 23rd, 2015, and 31st Meeting of the European Embryo Transfer Association (AETE); Ghent, Belgium, September 11th and 12th, 2015. Abstracts. |
| Tipo: Separatas |
Palavras-chave: Ovary.; Heifers; Physiology.. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1023895 |
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| Maffi,Andressa Stein; Luz,Gabriela Bueno; Gasperin,Bernardo Garziera; Mattos,Raine Fonseca; Xavier,Eduardo Gularte; Corrêa,Marcio Nunes; Brauner,Cássio Cassal. |
| ABSTRACT: The aim of this study was to evaluate the economic viability of the use of a lactation induction protocol in Holstein heifers. Were collected data of nutritional, reproductive and sanitary management pre and post-lactation period from 30 induction heifers (IG) and 30 pregnant heifers (CG). All animals were inseminated around 14 months of age and started lactation at 23±4 months. The animals of IG were heifers do not pregnant after two inseminations and natural service e were induced to lactation according to protocol: from the 1st to the 8th day, 30 mg of estradiol benzoate were administered daily, together with 300 mg of progesterone. From the 9th until the 14th, animals only received daily doses of 20 mg estradiol benzoate. On 16th day, 0.56... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Economic viability; Heifers; Induced lactation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001200701 |
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| ROSA, P. R.; ARAUJO, G. G. L. de; TURCO, S. H. N.; MORAES, S. A. de; ALVES, J. N.; GOIS, G. C.; SANTOS, R. D. dos; CAMPOS, F. S.. |
| The objective was to evaluate the effects of potential use of brackish water as a source for Sindhi heifers on ingestive behavior and physiological and serum parameters. Twenty-four Sindhi heifers were distributed in a completely randomized design with four treatments and six replications, with levels of total dissolved solids (TDS) of 640, 3200, 5760, and 8320 mg/L. Three 24-hour behavioral tests were performed, which were divided into four observation shifts (00:00 to 06:00; 06:00 to 12:00; 12:00 to 18:00 and 18:00 to 00:00) at the beginning, middle, and end of the experiment. The highest values of black globe temperature humidity index and air temperature were observed at 14:00 h, with values of 92.7 and 34.1 °C, respectively. The different levels of... |
| Tipo: Artigo de periódico |
Palavras-chave: Raça Sindi; Comportamento fisiologico; Semiárido; Novilho; Água Salina; Água Salobra; Heifers. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113738 |
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| GREGIANINI, H. A. G.; CARNEIRO JUNIOR, J. M.; NETO, A. P.; COSTA FILHO, L. C. da C.; GREGIANINI, J. T. F.; PINHEIRO, A. K.; TRENKEL, C. K. G.. |
| Avaliou-se a precocidade sexual de novilhas em programa de melhoramento genético no Acre, entre janeiro/2018 a fevereiro/2019, onde 184 novilhas Nelore com idade de 11-14 meses, peso médio ajustado no momento da indução de ciclicidade (IC) de 280,17 Kg e ganho de peso médio de 0,6 Kg/dia, foram pesadas, submetidas a protocolo de IC e classificadas em Categoria A (tônus uterino e ciclicidade ovariana), Categoria B (tônus uterino ou ciclicidade) e Categoria C (acíclicas e sem tônus uterino), e submetidas a sincronização do estro visando IATF, com diagnóstico de gestação realizado após 30 dias. Foram ainda submetidas à ultrassonografia de carcaça para obtenção da área de olho de lombo (AOL) e acabamento de carcaça (ACAB). Analisou-se: AOL, ACAB, peso, índice... |
| Tipo: Artigo de periódico |
Palavras-chave: Aumento de peso; Reproducción de animales; Cruce de animales; Regulación hormonal; Vaquilla; Pubertad; Fazenda Itaituba; Bujari (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental.; Melhoramento Genético Animal; Reprodução Animal; Gado Nelore; Novilho Precoce; Ganho de Peso; Maturidade Sexual.; Hormônio; Indução; Animal breeding; Animal reproduction; Nellore; Heifers; Weight gain; Hormonal regulation; Puberty.. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1134551 |
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| MELO, V. T. O. de; CASTRO, N. A. de; BAGON, A.; LIMA, H. de A. de; LAGOS, K. R.; BARBOSA, G. S.; SCHMITT, E.; PFEIFER, L. F. M.. |
| O objetivo deste estudo foi avaliar o efeito da Prostaglandina F2α (PGF) como indutor de ovulação em novilhas leiteiras. Treze novilhas púberes foram submetidas à sincronização de cio, e no Dia 5 da onda folicular receberam: 1) 1mg de BE (Grupo BE); 2) 500µg de PGF (Grupo PG) ou nenhum tratamento (Grupo Controle). Todas as novilhas ovularam, no entanto, os grupos BE e PG ovularam antes do Grupo CTL (P < 0,05). Estes resultados demonstram que a PGF é capaz de induzir a ovulação em novilhas leiteiras. |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Novilhas; PGF.; Ovulação.; Heifers; Ovulation.. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/978313 |
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| Souza,Evaristo Jorge Oliveira de; Valadares Filho,Sebastião de Campos; Guim,Adriana; Valadares,Rilene Ferreira Diniz; Marcondes,Marcos Inácio; Ferreira,Marcelo de Andrade; Prados,Laura Franco; Benedeti,Pedro del Bianco. |
| This study aimed to determine the protein requirements for females of Nellore, F1 Nellore × Angus and F1 Nellore × Simmental fed on two concentrate levels (30 and 50%). Sixty heifers from three genetic groups with 18 months of age were used: 20 Nellore, 20 Nellore × Angus and 20 Nellore × Simmental. Twelve heifers of the reference group (four of each genetic group) were slaughtered at the beginning of the experiment. Another 12 heifers (four of each genetic group) were fed on the level of maintenance and 36 heifers (12 animals of each genetic group) were kept in power system ad libitum with 30% (six of each group) or 50% (six of each group) dietary dry matter in concentrate. Heifers were randomly assigned to six treatments in a 3 × 2 factorial arrangement... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crossbred; Heifers; Metabolizable protein and net protein. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300040 |
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| Carnevalli,Roberta Aparecida; Mello,Andrea Cristina Tavares de; Shozo,Luciano; Crestani,Steben; Coletti,Admar Junior; Eckstein,Camila. |
| ABSTRACT: Ruminants vary their walking trajectory according to the positioning of the trees in integrated systems, which can determine the concentration of dung deposition at certain locations. The aim of this study was to map the distribution of feces and the behavior of dairy heifers in sunny and shaded areas. This experiment was carried out in Mato Grosso, Brazil, where the main grazing conditioner is shade due to the presence of trees in the pastures. Shading levels used were: full sunlight (control), moderate shade (338 trees ha−1) and intensive shade (714 trees ha−1) in randomized complete blocks. The experimental period was divided into three evaluation periods based on rainfall distribution: rainy period = December 2012; transition period = March... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pasture litter; Feces patches; Shade; Heifers. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001000651 |
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| Meirelles,C.F.; Abdalla,A.L.; Vitti,D.M.S.S.. |
| Most Brazilian dairy production is conducted by small holders whose general management skills and feeding programs are often deficient. One common problem directly attributed to underfeeding is that heifers rarely reach sexual maturity before 15 months of age. Groups of growing heifers were treated to detect the effects of protein supplementation and antihelmintic treatment on sexual maturity. The first ovulation occurred at 513 ± 44 and 573 ± 36 days (P<.01) in supplemented and control groups, respectively. Liveweight gains from start of the trial to the first ovulation were 378 ±.02 and 331 ±.04 g for suplemented (S) and control (C) groups. Only 52.17 % of heifers in C group (11 of 23) but 95.65 % in S group (22 of 23) reached sexual maturity before... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heifers; Puberty; Protein supplementation; Antihelmintic. |
| Ano: 1994 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000200026 |
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| Registros recuperados: 23 | |
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