Results 31 to 40 of about 2,676 (177)

Efeito da carga animal na produção de leite de vacas de corte primíparas e no desenvolvimento de seus bezerros Effect of stocking rates on milk production of primiparous beef cows and on growth of their calves

Revista Brasileira de Zootecnia, 2004
O objetivo deste trabalho foi avaliar o efeito de duas cargas animais (CA280= 280 e CA360= 360 kg PV/ha) em campo nativo e de duas composições raciais (½ Nelore ½ Hereford e ¼ Nelore ¾ Hereford) na produção de leite de vacas primíparas e no ...
José Inácio Braccini Fagundes, José Fernando Piva Lobato, Flávio Schramm Schenkel   +2 more
doaj   +1 more source

Testicular Histomorphometric Evaluation of Zebu Bull Breeds

Brazilian Archives of Biology and Technology, 2014
The objective of this study was to evaluate the quantitative histology and testicular biometrics in zebu bulls of different breeds. Testicular fragments of Nelore (n=10), Polled Nelore (n=6), Gir (n=5), Guzerat (n=5) and Tabapuã bulls (n=5) were used ...
Paulo Antônio Terrabuio Andreussi, Deiler Sampaio Costa, Fábio José Carvalho Faria, Carlos Antônio Carvalho Fernandes, Marcelo Diniz Santos, Juliana Correa Borges Silva   +5 more
doaj   +1 more source

A comparison of immunological, chemical and surgical castration of Nelore bulls

Theriogenology, 2021
The objective was to compare effects of immunological, chemical and surgical castrations on testicular characteristics, scrotal surface temperatures, sperm quality, and serum testosterone concentrations in Bos indicus bulls. Eighty Nelore bulls (∼20 mo) were grazed on pasture, fed a supplement and slaughtered at ∼480 kg.
Paulo Henrique Yamada, Viviane Maria Codognoto, Felipe Rydygier de Ruediger, Kelry Mayara da Silva, Viviana Vallejo Aristizábal, John Patrick Kastelic, Guilherme Rizzoto, Fabiana Ferreira de Souza, Ricardo Velludo Gomes de Soutello, Marcelo George Mungai Chacur, Eunice Oba   +10 more
openaire   +4 more sources

Análise de custos de diferentes grupos genéticos de bovinos de corte terminados em confinamento Cost analyses on different beef cattle genetic groups finished in feedlot condition

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2004
O desempenho de 149 animais, machos inteiros, confinados por períodos variáveis de acordo com acabamento de carcaça, foi utilizado para avaliar a eficiência econômica dos grupos genéticos Nelore sobreano, Nelore desmamado, ½ Valdostana ½ Nelore, ½ ...
I.C. Ferreira, M.A. Silva, R.P. Reis, K. Euclides Filho, G.R. Figueiredo   +4 more
doaj   +1 more source

Desempenho de bezerros da raça Nelore e cruzados desmamados recebendo concentrado em pastagem adubada de Cynodon dactylon cv. Coastcross Performance of weaned Nelore and crossbred calves grazing Cynodon dactylon cv. Coastcross fertilized pastures supplemented with concentrate

Revista Brasileira de Zootecnia, 2009
Em três anos de pesquisa, avaliou-se o desempenho de bezerros desmamados de quatro grupos genéticos (Nelore; Canchim × Nelore; Angus × Nelore; e Simental × Nelore) em pastagem de Cynodon dactylon, cv.
Geraldo Maria da Cruz, Armando de Andrade Rodrigues, Rymer Ramiz Tullio, Maurício Mello de Alencar, Guilherme Fernando Alleoni, Gilson Pereira de Oliveira   +5 more
doaj   +1 more source

Caracterização fenotípica de vacas F1 Holandês x Zebu de diferentes bases maternas [PDF]

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2020
RESUMO Caracterizaram-se fêmeas F1 Holandês x Zebu de diferentes bases maternas quanto às pelagens, despigmentações e características morfométricas. Foram utilizadas 266 fêmeas F1, progênies do cruzamento de 26 touros da raça Holandesa com fêmeas de ...
A.F. Reis, M.D. Costa, J.R.M. Ruas, C.C.S. Carvalho, V.M. Gomes, E.A. Silva, V.R. Rocha Júnior, F.M.F. Chagas   +7 more
doaj   +1 more source

Follicle Stimulating Hormone in Cattle Breeding: Fundamentals, Innovations, and Scope

Animal Research and One Health, EarlyView.
FSH is crucial in cattle reproduction, with exogenous administration enhancing breeding and embryo production. Recombinant FSH offers advantages over pituitary‐extracted variants, including fewer injections, reduced stress, and safer production. These innovations improve breeding efficiency, optimize reproductive outcomes, and contribute to sustainable
Muhammad Shahzad, Hubdar Ali Kolachi, Jesse Oluwaseun Ayantoye, Xiaomeng Zhang, Muhammad Usman Mehmood, Rajilan Hilali Shanga, Pengcheng Wan, Xueming Zhao   +7 more
wiley   +1 more source

Relationship of weight gain with infrared temperatures in Nelore and F1 (Nelore × Angus) heifers reared in two forage production systems1 [PDF]

Journal of Animal Science, 2018
Intensive production systems require high-yield genetics as obtained in Bos taurus × Bos indicus crossbreeding. Generally, high-producing taurine cattle are more susceptible to parasites and heat stress. This study evaluated animal performance, heat-stress measurement (infrared temperatures), and internal parasite infection with daily weight gain in ...
Tiago P Paim, Rodrigo de Oliveira Goulart, Diego A L da Silva, Janayna de Almeida Sousa, Lucas F Gonçalves, Flavio L Claudio, Guido Calgaro Júnior, Alexandra A Gléria, Leonardo C Santos, Estenio M Alves   +9 more
openaire   +2 more sources

Plasma Pharmacokinetic Profile of Fipronil 1% Pour‐On in Cattle: Photodegradation and the Sustained Systemic Persistence of Fipronil Sulfone

Journal of Veterinary Pharmacology and Therapeutics, EarlyView.
ABSTRACT This study characterized the long‐term pharmacokinetic profile of a 1% fipronil pour‐on formulation in Nellore bulls under field conditions. Seventeen animals received a single topical dose (1 mg/kg), and plasma concentrations of fipronil and its metabolites (sulfone and desulfinyl) were monitored for 175 days using LC–MS/MS.
Stefani Maria Ferreira, Leonila Ester Reinert Raspantini, Giselle Kindlein, Fabiano Barreto, Caroline Andrade Tomaszewski, Tamara dos Santos Castilhos, Daniel Rodrigo Hillesheim, Silvana Lima Górniak, André Tadeu Gotardo   +8 more
wiley   +1 more source

Ingestive behavior of Nellore cows and their straightbred or crossbred calves Comportamento em pastejo de vacas Nelores amamentando bezerros Nelores ou mestiços Simental × Nelore

Revista Brasileira de Zootecnia, 2010
This trial aimed to investigate the influence of calf genetic group on the ingestive behavior of Nellore dams and their offspring on pasture. Twenty one primiparous and multiparous Nellore cows were assigned to the experiment; 13 cows nursed straightbred Nellore calves; and eight cows nursed halfbred Simmental × Nellore calves.
Fernando Miranda de Vargas Junior, Francisco Stefano Wechsler, Patrícia Rossi, Marcus Vinicius Morais de Oliveira, Patrick Schmidt   +4 more
openaire   +2 more sources