Sperm fertility and viability following 48 h of refrigeration: Evaluation of different extenders for the preservation of bull semen in liquid state

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Adding Motility Stimulants to Improve Freezing of Buffalo Sperm Recovered from Epididymal Cauda

The cryopreservation of epididymal sperm is important to preserve genetic material from valuable buffalo bulls. This study evaluated the viability of post-thawed sperm samples recovered from the epididymal cauda adding motility inductors. For that, were used epididymides from eight Murrah buffaloes with 18 months of age. Semen samples were submitted to three different conditions: (CT - control) without adding medium, (SPERM) adding Sperm Talp medium, and (FERT) adding Fert Talp medium. Immediately after slaughter, both testicles from each animal were collected and transported at 4 degrees C at maximum six hours interval. In laboratory, the removed epididymides was flushed to obtain sperm and diluted in the freezing extender. Each buffalo sperm were divided and fractions were submitted to all conditions (CT, SPERM and FERT). Semen doses were frozen at -196 degrees C. CT, SPERM and FERT post-thawing results were 13.63 +/- 8.91, 38.77 +/- 8.91 and 42.83 +/- 8.91 for total motility, 7.30 +/- 8.74, 24.87 +/- 8.74 and 29.70 +/- 8.74 for progressive motility, 6.04 +/- 0.92, 6.74 +/- 0.92 and 6.93 +/- 0.92 for percentage of rapid cells (P < 0.05). In conclusion, diluted semen supplementation with Sperm or Fert talp increases the motility of cauda epididymal sperm of buffalo bulls.

Genome-Wide Mapping of Loci Explaining Variance in Scrotal Circumference in Nellore Cattle

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Assessment of in vitro sperm characteristics and their importance in the prediction of conception rate in a bovine timed-AI program

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Crude glycerin in diets for feedlot Nellore cattle

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Ivermectina e abamectina em diferentes doses e vias de aplicação contra larvas de Cochliomyia hominivorax em bolsas escrotais de bovinos recém-castrados, provenientes da região sudeste do Brasil

The preventive efficacy of ivermectin and abamectin administered in different routes (subcutaneous, intramuscular and pour-on) and doses (200 and 500mcg kg(-1)) against Cochliomyia hominivorax in the scrotal sac of cattle after castration, was evaluated. Animals from six different farms, in the state of Sao Paulo and Minas Gerais, Brazil were used. For each study, 3045 uncastrated bulls, depending on the number of groups, were selected. On day zero of the study, the procedure was carried out by the method of bloody castration and the animals were treated after this process. The efficacy of ivermectin and abamectin administered via the pour-on (500mcg kg(-1)), subcutaneous (200mcg kg(-1)) as well as the efficacy of abamectin intramuscularly (200mcg kg(-1)) were evaluated. In each experiment, one group of animals was kept as control. The animals were evaluated from the 3rd to the 14th day after castration process/treatment. The efficacy values for both active principles were <= 30% the next day 10 post-treatment (PT), and in five experiments, both ivermectin and abamectin, regardless of the route of administration, were ineffective (0.0%) on the day 10th PT. Based on the results found in this study, conducted in different properties from southeastern Brazil, both ivermectin and abamectin, when used the protocol presented, were considered ineffective in preventing scrotal myiasis in bulls, irrespective of the route of administration and dose used.

Crude Glycerin associated with starch or fiber-based energy ingredients at two levels of concentrate for beef cattle

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Desempenho, características de carcaça e expressão de genes em tourinhos alimentados com lipídeos e monensina

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Utilização de probiótico e monensina sódica sobre o desempenho produtivo e características de carcaça de bovinos Nelore terminados em confinamento

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Padrão de deposição de tecidos muscular e adiposo de bovinos Nelore castrados e não- castrados suplementados com cloridrato e zilpaterol

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Uso de cloridrato de zilpaterol em dietas para bovinos nelore confinados

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Evolução do temperamento de bovinos de corte mantidos a pasto e frequentemente manejados

Pós-graduação em Zootecnia - FCAV

Suplementação de alto consumo na terminação de tourinhos Nelore em pastagem de b. brizantha cv. Marandu

Pós-graduação em Zootecnia - FCAV

Uso da levedura Yea-Sacc8417, monensina sódica e sua associação em dietas para tourinhos Nelore, alimentados com elevada proporção de concentrado

Pós-graduação em Zootecnia - FCAV

Associação genética entre o perfil de ácidos graxos e outras características da carcaça e carne de bovinos da raça Nelore

Pós-graduação em Genética e Melhoramento Animal - FCAV