Made available in DSpace on 2022-05-01T12:09:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; Background: Progesterone (P4) is essential for embryonic development and maintenance of pregnancy when deficiency causes early embryonic loss. In this study, we investigated the ability of hormonal supplementation to improve the fertility of Nellore females subjected to fixed-time artificial inseminatio...
Made available in DSpace on 2021-06-25T10:20:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Background: In vitro embryo production (IVEP) allows the spread of superior animal genetics, but pregnancy rates show a high variability with this biotechnique. In the initial stage of pregnancy, progesterone plays a fundamental role ...
Made available in DSpace on 2021-06-25T19:36:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-10-01; This study aimed to evaluate a correlation between environmental temperature-humidity index (THI), rectal temperature (RT) and plasmatic concentration of cortisol in pregnancy rates of recipient cows in the Amazon biome. Recipient cows (n = 235) were submitted to an estrus synchronization simplified P36...
The objective of this study was to evaluate the influence of energy supplementation on associative effects between forage and concentrate supplements and on the performance of beef cattle on a tropical pasture during the rainy season. Twenty-eight Nellore bulls averaging 19 months of age and 325.2 ± 4.1 kg were allotted to a completely randomized design and distributed into four paddocks of two hectares each wi...
The transmission of Caprine Arthritis Encephalitis in semen limits the use of seropositive bucks that have high genetic value. The Caprine Arthritis Encephalitis virus (CAEV) may be found in the form of RNA virus (free virus) or pro-viral DNA within non-spermatic cells in semen. Thus, researches involving plants with potential antiviral activity are promising for developing techniques that allow the use of seme...
This study examined the effectiveness of control measures for caprine arthritis-encephalitis in a herd with 431 dairy goats in an intensive rearing system. All animals older than six months were initially tested by agar gel immunodiffusion (AGID) and separated into seropositive and seronegative. Control measures were implemented for two years and ten months. Five serological examinations were subsequently perfo...
Caprine arthritis encephalitis is a lentiviral disease that leads to considerable losses in goat farming. In the acute phase of viral infection, though antiviral antibodies are produced by the host’s immune system, they are not sufficient to be detected by serological tests. Acute infections begin with an incubation period, during which the viral genome replicates and host innate responses are initiated. Matrix...