Buscar
Mostrando ítems 1-10 de 528
Characterization of Campylobacter in genitals of buffalo bulls
(Indian Counc Agricultural Res, 1997-08-01)
Effect of age and genetic group on characteristics of the scrotum, testes and testicular vascular cones, and on sperm production and semen quality in AI bulls in Brazil
(Elsevier B.V., 2002-10-01)
The objectives were to determine the effects of age and genetic group on characteristics of the scrotum, testes and testicular vascular cones (TVC), and on sperm production and semen quality in 107 Bos indicus, B, taurus ...
Comportamento sócio-sexual e de manutenção de touros nelore durante a estação de monta
(2010-08-03)
Changes in the bull: cow proportion in natural breeding have been proposed, but there are not evaluations about the effect of these changes in the behaviour of Nellore bulls. The objective of this study was to test the ...
Effects of environmental factors, age and genotype on sperm production and semen quality in Bos indicus and Bos taurus AI bulls in Brazil
(Elsevier B.V., 2002-04-15)
The effects of ambient temperature and humidity, month, age and genotype on sperm production and semen quality in AI bulls in Brazil were evaluated. Data from two consecutive years were analyzed separately. Seven Bos indicus ...
The Effect of Season on Semen Characteristics and Freezability in Bos indicus and Bos taurus Bulls in the Southeastern Region of Brazil
(Wiley-Blackwell Publishing, Inc, 2009-08-01)
The objectives of this study were to evaluate the effects of season in southeast of Brazil comparing genotypes on semen characteristics, freezability and peripheral plasma concentrations of testosterone. Ejaculates of five ...
Bull semen varibles after experimental exposure with Bovine Herpesvirus type 5
(Elsevier B.V., 2011-03-01)
The influence of Bovine Herpesvirus type 5 (BoHV-5) infection on semen variables and sperm morphology collected from healthy bulls with no reproductive disorder was evaluated in ten ejaculates distributed into two experimental ...
Fertility-associated proteins in Nelore bull sperm membranes
(Elsevier B.V., 2006-01-01)
The present study was undertaken to evaluate the protein composition of the sperm membranes (SM) of Nelore bulls, assessing protein markers associated with bull fertility, and whether these markers can be used for predicting ...