Objetivou-se avaliar dados retrospectivos da produção in vitro de embriões (PIV) em Nelore, no Estado do Acre, a fim de estabelecer parâmetros não genéticos e genéticos. Para tanto, dados de 1292 sessões de aspirações foliculares guiadas por ultra som realizadas em 571 doadoras Nelore, distribuídas em dez fazendas no Acre, entre os anos de 2015 e 2018, foram coletados e analisados para estimativa de parâmetros ...
Made available in DSpace on 2022-04-30T00:06:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01; Estrus synchronization is a reproductive biotechnology used to improve artificial insemination or pairing through the manipulation of the estrous cycle at a desirable time. Employing this technique in captive pacas (Cuniculus paca L.) is important because it creates expectation of meeting the demand for...
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...
Made available in DSpace on 2020-12-10T20:10:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-09-15; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); This study aimed to evaluate the effect of sodium caseinate added into freezing extender on the sperm parameters of cryopreserved bull semen and in vitro and in vivo fertility. One ejaculate of 30 bulls was used and processed using Bot...
Estrus synchronization is a reproductive biotechnology used to improve artificial insemination or pairing through the manipulation of the estrous cycle at a desirable time. Employing this technique in captive pacas (Cuniculus paca L.) is important because it creates expectation of meeting the demand for paca meat and, consequently, reduces poaching. Thus, this research aims to verify the effect of a progestogen...
Para melhor compreender as diferenças entre zebuínos e taurinos em relação à resistência ao ETC, objetivou-se verificar se a resistência ao ETC é resultado da contribuição genética do oócito, do espermatozoide ou de ambos. Oócitos de vacas das raças Nelore e mestiças com fenótipo predominante da raça Holandesa preto e branco (mHPB) foram coletados, maturados e fertilizados com espermatozoide de touros das raças...