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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 ...
Performance and greenhouse gas emission of Nellore and F1 Angus × Nellore yearling bulls in tropical production systems during backgrounding and finishing
(2021-09-01)
This study investigated the performance, carcass traits, and greenhouse gas emission of Nellore and F1 Angus × Nellore yearling bulls raised under two [lenient (S1) and intensified (S2)] production systems during the ...
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 ...
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 ...
Electroencephalographic assessment of pneumatically powered penetrating and non-penetrating captive-bolt stunning of bulls
(Elsevier B.V., 2019-05-01)
The electroencephalographic (EEG) responses of 31 bulls (zebu crossbred cattle) stunned with either pneumatically powered Jarvis penetrating (PCB) or non-penetrating captive bolt (NPCB) was examined. Animals were organized ...
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 ...
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 ...
Effects of feeding a spray-dried multivalent polyclonal antibody preparation on feedlot performance, feeding behavior, carcass characteristics, rumenitis, and blood gas profile of Brangus and Nellore yearling bulls
(2015-09-08)
The objective of this study was to evaluate the effects of replacing monensin (MON) with a spray-dried multivalent polyclonal antibody preparation (PAP) against several ruminal microorganisms on feedlot performance, carcass ...
Does sperm quality and DNA integrity differ in cryopreserved semen samples from young, adult, and aged Nellore bulls?
(2017-06-21)
Background: In humans, it is now well documented that rising paternal age is correlated with decreased sperm DNA integrity and embryonic developmental failures. On the other side of the coin, it is also reported that very ...
Performance, carcass and cut yields of crossbred Marchigiana x Nellore animals, bulls and heifers, finished in feedlots
(Revista Brasileira Zootecnia Brazilian Journal Animal SciVicosa-mgBrasil, 1998)