|
|
|
| Registros recuperados: 19 | |
|
|
| Borges,Luiz Felipe Kruel; Ferreira,Rogério; Siqueira,Lucas Carvalho; Bohrer,Rodrigo Camponogara; Borstmann,Jacson William; Oliveira,João Francisco Coelho de; Gonçalves,Paulo Bayard Dias. |
| The aim was to develop a timed artificial insemination (TAI) system in suckled beef cows. Cows (n=227), 60-80 days postpartum, received estradiol benzoate (5mg) and a vaginal device containing 250µg of medroxyprogesterone acetate (MPA; day 0). On day six, cloprostenol (125µg) and eCG (400IU) were administrated and calves were weaned for 88h. The devices were removed on day seven (BioRep group) or on day eight (TAI group). All cows of TAI group and cows of BioRep group that did not exhibit standing estrus received GnRH (100µg) on day 9. In experiment I, the follicular growth was monitored daily by transrectal ultrasound exams, from day 6 to day 9. The average size of the dominant follicle on day nine was 11.1±0.99mm (BioRep, n=7) and 11.5±0.65mm (TAI, n=7)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cows; Postpartum; TAI; MPA; Ovulation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000200028 |
| |
|
|
| Talini,R.; Kozicki,L.E.; Gaievski,F.R.; Polo,G.; Lima,L.G.F.; Santiago,J.; Segui,M.S.; Weiss,R.R.; Galan,T.G.B.. |
| ABSTRACT The objective of the study was to determine whether or not there is a correlation between thermoresistance tests (TT) after semen thawing and pregnancy rate (PR) after fixed-time artificial insemination (FTAI). Four different TT were performed on ten samples used for AI; a rapid test (RTT) (30min / 46°C) and three slow tests (STT): STT1 (60min/38°C), STT2 (180min/38°C), and STT3 (300min/38°C). Two hundred and fifteen multiparous crossbred cows were submitted to FTAI under the following protocol: on day zero (d0) the animals received a P4 device +EB; on d7 PGF2α; on d8 P4 was removed and eCG+EC were administered; IATF was performed on d10. Three gestational diagnoses (G D) were performed on d40, d70 and d120. The mean sperm motility (%) in RTT and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sperm motility; Casa; Pregnancy rate; Beef cows; Semen thermoresistance test. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000602085 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Rocha,T.G.; Franciosi,C.; Nociti,R.P.; Silva,P.C.; Sampaio,A.A.M.; Fagliari,J.J.. |
| Avaliou-se a influência do número de parições nos valores de alguns parâmetros bioquímicos e do perfil eletroforético do soro lácteo de vacas de corte. Trinta e cinco vacas da raça Canchim foram alocadas em cinco grupos: vacas de primeira lactação, segunda lactação, terceira e quarta lactações, quinta lactação e sexta lactação. As amostras de secreção láctea foram coletadas imediatamente após (dia 0) e 1, 2, 7, 15 e 30 dias após o parto. As concentrações de gamaglutamiltranferase (GGT), proteína total, cálcio, fósforo, magnésio e cálcio ionizado foram avaliadas. A separação eletroforética das proteínas foi realizada em matriz de gel de poliacrilamida (SDS-PAGE). A atividade de GGT e as concentrações de imunoglobulina G, cálcio e fósforo não foram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cows; Biochemistry; Parity; Colostrum; Milk. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000100043 |
| |
|
| |
|
|
| DINIZ, J. V. A.; DELL'AQUA JUNIOR, J. A.; OBA, E.; FREITAS, R. R. de; PEIXOTO, R. M.; SILVA, L. O.; MAIA, G. F. N. M.; CARVALHO, B. P.; LOUREIRO, B.; SATRAPA, R. A.. |
| Progesterone (P4) is essential for embryonic development and maintenance of pregnancy when deficiency causes early embryonic loss. In this study, we investigated the ability of hormonal supplementation to improve the fertility of Nellore females subjected to fixed-time artificial insemination (IATF) protocols. Here, we evaluated the effect of long-acting injectable progesterone (iP4) supplementation in the D4 after IATF on pregnancy rate and pregnancy loss in Nellore females (Bos taurus indicus) from different reproductive categories in Western Amazonia. Materials, Methods & Results: Eight hundred thirteen Nellore females from 5 farms were selected and distributed into 2 groups: control [GC; administration of 0.5 mL of 0.9% saline solution,... |
| Tipo: Artigo de periódico |
Palavras-chave: Métodos de mejoramiento genético.; Hormonas progestacionales; Inseminación artificial; Ovulación; Vacas para carne; Ganado de carne; Fertilidad animal; Reproducción de animales; Reprodução Animal; Fertilidade Animal; Hormônio; Progesterona; Prenhez; Gado de Corte; Gado Nelore; Vaca de Corte; Ovulação; Inseminação Artificial; Breeding methods.; Progesterone; Animal breeding; Animal reproduction; Animal fertility; Beef cattle; Beef cows; Nellore; Ovulation; Artificial insemination; Progestational hormones. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139496 |
| |
|
|
| CAVALI, J.; ASSIS, A. A. R. de; PORTO, M. O.; SALES, M. F. L.; OLIVEIRA JÚNIOR, J. S.; FERREIRA, E.; ABATI, E. C.; LAZARI, T. A.. |
| The milk production of beef cows has a direct influence on the weight gain of their calves. The use of supplements that can increase milk production of beef cows has been studied in recent years, aiming at higher rates of calf weight gain, and the use of additives may be a viable alternative in the supplementation of beef cows. The aim of the present study was to evaluate the milk yield of Nelore cows, under mineral supplementation with and without virginiamycin. |
| Tipo: Parte de livro |
Palavras-chave: Aumento de peso; Elaboración de leche; Nutrición animal; Pastos forrajeros; Raza de bovinos Nelore; Suplementos dietéticos minerales; Terneros; Vacas para carne; Gado Nelore; Vaca de corte; Produção leiteira; Nutrição animal; Gramínea forrageira; Capim Brachiaria; Brachiaria brizantha; Suplemento mineral; Virginiamicina; Bezerro de corte; Ganho de peso; Nellore; Beef cows; Milk production; Animal nutrition; Forage grasses; Urochloa brizantha; Dietary mineral supplements; Virginiamycin; Calves; Weight gain. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1090521 |
| |
|
| |
|
| |
|
|
| ALENCAR, M. M. de; BARBOSA, R. T.. |
| Trabalhos de pesquisa têm mostrado a importância da produção de leite das vacas para o desenvolvimento dos bezerros. Entretanto, a produção de bezerros deve ser considerada como um sistema que envolve, também, a eficiência reprodutiva da vaca. 0 presente trabalho tem o objetivo de apresentar resultados de pesquisas realizadas na Embrapa Pecuária Sudeste, envolvendo produção de leite e eficiência reprodutiva de vacas de corte.Estudaram-se os efeitos da produção de leite total (PLT = produção de leite aos 30 dias mais a produção de leite aos 120 dias após o parto) sobre a eficiência reprodutiva de vacas da raça Canchim. A produção de leite da vaca apresentou efeito altamente significativo sobre o intervalo parto-primeiro serviço, sendo que para cada... |
| Tipo: Separatas |
Palavras-chave: Produção de leite; Beffe cattle.; Gado de Corte; Vaca de Corte.; Beef cows; Milk production.. |
| Ano: 2000 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/44845 |
| |
|
|
| ASSIS, A. A. R. de; PORTO, M. O.; CAVALI, J.; SALES, M. F. L.; OLIVEIRA JÚNIOR, J. S.; FERREIRA, E.; VENTUROSO, O. J.; ANDRADE, R. A.. |
| Supplementation with the use of additives for 3 to 4-month old calves can increase their productive performance, due to alterations that occur in the gastrointestinal tract and the decrease in cow milk production during this period. Thus, the use of supplements becomes necessary to increase weight gain rates. The aim of the present study was to evaluate the productive performance of suckling Nellore calves under mineral supplementation with and without virginiamycin. |
| Tipo: Parte de livro |
Palavras-chave: Aumento de peso; Desempeño animal; Elaboración de leche; Nutrición animal; Raza de bovinos Nelore; Suplementos dietéticos minerales; Terneros; Vacas para carne; Gado Nelore; Vaca de corte; Produção leiteira; Nutrição animal; Suplemento mineral; Virginiamicina; Bezerro de corte; Ganho de peso; Performance; Nellore; Beef cows; Milk production; Animal nutrition; Dietary mineral supplements; Virginiamycin; Calves; Weight gain; Animal performance. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1090522 |
| |
|
|
| PORTO, M. O.; ASSIS, A. A. R. de; CAVALI, J.; SALES, M. F. L.; FERREIRA, E.; OLIVEIRA JÚNIOR, J. S. de; SOUZA, P. de J.; ANDRADE, R. A.. |
| Protein-energy supplementation of beef cows has been scarcely applied in Brazil. However, the use of ruminant fermentation modulating additives has become a viable alternative in the Supplementation of this animal category due to the low inclusion of these additives in the mineral supplements, which require little or no change in trough structure and property management. The aim of the present study was to evaluate the productive performance of Nelore lactating cows under the use of mineral supplementation with and without virginiamycin. |
| Tipo: Parte de livro |
Palavras-chave: Aumento de peso; Desempeño animal; Elaboración de leche; Lactación; Nutrición animal; Raza de bovinos Nelore; Suplementos dietéticos minerales; Vacas para carne; Gado Nelore; Vaca de corte; Produção leiteira; Nutrição animal; Suplemento mineral; Virginiamicina; Ganho de peso; Lactação; Performance; Nellore; Beef cows; Milk production; Animal nutrition; Dietary mineral supplements; Virginiamycin; Weight gain; Lactation; Animal performance. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1090525 |
| |
|
|
| Ferreira,Rogério; Oliveira,João Francisco Coelho de; Antoniazzi,Alfredo Quites; Pimentel,Cláudio Alves; Moraes,José Carlos Ferrugem; Henkes,Luiz Ernani; Bordignon,Vilceu; Gonçalves,Paulo Bayard Dias. |
| The objective of this study was to investigate the causes of the repeat breeder syndrome comparing clinical signs and postmortem findings in beef cows. The identification of factors affecting the reproductive tract can support decisions as to whether treatment of repeat breeder cows is justifiable than culling. Since all animals were submitted to clinical examination before being slaughtered, this study has a differential approach when compared with others, where genital tracts from abattoir were examined. In this study, 130 crossbred cows and heifers that have failed to conceive after three or more services were identified, submitted to a clinical examination and blood collection for karyotyping and sent to an abattoir. postmortem examinations included... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Repeat breeder; Beef cows; Cattle; Infertility; Theriogenology. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000400023 |
| |
| Registros recuperados: 19 | |
|
|
|
