Results 51 to 60 of about 329,940 (300)

Desempenho em confinamento de bovinos de corte, castrados ou não, alimentados com teores crescentes de farelo do mesocarpo de babaçu Performance in feedlot beef cattle, bulls or not, fed with increasing levels of babassu mesocarp meal

Ciência Rural, 2012
Objetivou-se avaliar quatro teores de inclusão de farelo do mesocarpo de babaçu (Orbygnya spp.) no concentrado sobre o desempenho de bovinos confinados. Foram utilizados 24 bovinos machos (12 castrados e 12 não castrados) com idade e peso corporal médio ...
Nelson Rafael da Silva, Ana Cristina Holanda Ferreira, Cristian Faturi, Gerson Fausto da Silva, Regis Luis Missio, José Neuman Miranda Neiva, Vera Lúcia de Araújo, Emerson Alexandrino   +7 more
doaj   +1 more source

Age-related differences of semen quality, seminal plasma, and spermatozoa antioxidative and oxidative stress variables in bulls during cold and warm periods of the year.

Animal, 2017
The aims of this study were to determine the presence and quantities of antioxidative status and oxidative stress (OS) variables in the seminal plasma and spermatozoa of bulls of varying age during cold and warm periods of the year, and to establish the ...
S. Vince, I. Žaja, M. Samardžija, I. M. Balić, M. Vilić, D. Đuričić, H. Valpotić, F. Marković, S. Milinković-Tur   +8 more
semanticscholar   +1 more source

Investigations into variation in growth performance of cattle at pasture : a thesis submitted in partial fulfillment of the requirements for the Masters in Applied Science (Animal Science) at Massey University [PDF]

, 2000
The aim of this experiment was to examine relationships between the growth rate (LWG) and estimates of voluntary feed intake, feed conversion efficiency (GFE), temperament, susceptibility to chronic (longer-term) stress, indices of mature weight and ...
Burnham, Dean Leslie
core  

Exame andrológico em touros: qualidade dos indicadores da aptidão reprodutiva em distintos grupos raciais Andrologycal examination in bulls: quality of breedng soundness criteria in different genetic groups

Ciência Rural, 1998
Os padrões recomendados para os componentes do exame andrológico são únicos para todas as raças e sistemas de produção, resultando em perdas económicas pela eliminação de reprodutores em alguns conjuntos raciais.
José Carlos Ferrugem Moraes, Marilise Mesquita Horn, Adriano Garcia Rosado Jr.   +2 more
doaj   +1 more source

Investigations on bovine herpesvirus 4 infections in cattle in Bulgaria

Bulgarian Journal of Veterinary Medicine, 2023
Cattle infected with BHV 4 show respiratory symptoms, gastrointestinal and postnatal genital disorders. The virus is a cofactor of bacterial infections.
R. Pashev
doaj   +1 more source

Associação entre o perfil andrológico e a congelação de sêmen de touros da raça Nelore aos dois anos de idade, pré-selecionados pela classificação andrológica por pontos (CAP) Relationship between andrologic profile and semen freezing in two-year-old Nelore bulls, pre select by breeding soundness evaluation (BSE)

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2008
Avaliaram-se as características andrológicas (n=163) e de congelação do sêmen (n=55) de touros jovens da raça Nelore e estudou-se a associação entre essas avaliações, visando à localização de marcadores para alta fertilidade e congelabilidade do sêmen ...
D.F. Salvador, V.J. Andrade, V.R. Vale Filho, J.C. Dias, L.A.G. Nogueira   +4 more
doaj   +1 more source

Effect of age on lipid peroxidation of fresh and frozen-thawed semen of Nili-Ravi buffalo bulls

, 2018
Buffalo bull spermatozoa are rich in polyunsaturated fatty acids and are prone to lipid peroxidation. We hypothesised that lipid peroxidation in buffalo bull semen will increase with age and will affect the semen quality.
Sohail Ahmed, M. Khan, M. Ahmad, S. Iqbal   +3 more
semanticscholar   +1 more source

Physiological and behavioural aspects of housing stress in cattle [PDF]

, 2008
End of project reportThe effect of various space allowances on pituitary, adrenal, immune responses and performance was investigated in 72 Holstein x Friesian bulls.
Earley, Bernadette, Gupta, Sandeep, Murray, Margaret, Prendiville, Daniel J.   +3 more
core  

Effect of melatonin on bovine sperm characteristics and ultrastructure changes following cryopreservation

Veterinary Medicine and Science, 2020
The production of reactive oxygen species (ROS) during cryopreservation of semen alters the sperm motion and mobility characteristics, resulting in poor or failure of conception rate after artificial insemination (AI). Melatonin an antioxidant is able to
A. R. ChaithraShree, Shailesh D. Ingole, Vikas D. Dighe, Anagha S. Nagvekar, Simin V. Bharucha, Nilesh R. Dagli, Prakash M. Kekan, Shambhudeo D. Kharde   +7 more
doaj   +1 more source

A Study in Bulls

Journal of Dairy Science, 1920
Summary 1. Purebred dairy bulls vary greatly in their ability to transmit producing capacity to their offspring. 2. This is not a breed characteristic. 3. In determining the value of a bull the difficulties he has to overcome must be taken into consideration.
McCandlish, Andrew C., Winters, Laurence M.   +1 more
openaire   +2 more sources