Estrus Detection
Mostrando 13-24 de 32 artigos, teses e dissertações.
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13. Dinâmica folicular de vacas de corte tratadas com três protocolos de sincronização da ovulação =Ovarian follicular dynamics in beef cows treated with three protocols of synchronization of ovulation / Ovarian follicular dynamics in beef cows treated with three protocols of synchronization of ovulation
Background: Artificial insemination is an established and viable technique to accelerate the genetic advancement and economic return of the cattle. However, compromises the efficiency of detection of estrus results in low insemination rates. To avoid these problems in beef herd, synchronization protocols have been developed that allow inseminate large number
Publicado em: 2011
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14. Comportamento sexual de cabras Toggenburg durante a estação reprodutiva após luteólise natural ou induzida
Proestrus (days -2 and -1), estrus (days 1, 2 and 3) and metaestrus (days +1 and +2) sexual behavior was monitored in Toggenburg females goats, during natural breeding season after induced and natural luteolysis. The females received two doses of PGF2 10-day interval, for estrus synchronization. After the first injection the estrus was monitored three times
Publicado em: 2010
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15. Protocolos de sincronização da ovulação para inseminação artificial com tempo fixo em ovelhas / Protocol synchronization of estrus and ovulation in sheep
The aim of study was to test the hormonal protocol for FTAI (fixed timed artificial insemination) with progesterone for 6 days applying eCG (Equine Corionic Gonadotrophin) or BE (Estradiol Benzoate) and induction of estrus using: MAP (acetato de medroxiprogesterone) for 6, 9 and 14 days or a single dose of PGF2a or male effect. Experiment 1: In D0 each ewe (
Publicado em: 2009
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16. Avaliação crítica da adoção de protocolos hormonais sobre o desempenho reprodutivo de fêmeas zebuínas
The experiments were conducted in five different farms located in Minas Gerais State, with particular management according to the use of breeding season, suckling restriction and artificial insemination. The animals were divided into categories (heifer, non-lactating and lactating cows) and their reproductive status were evaluated by rectal palpation and ult
Publicado em: 2009
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17. Influência do diâmetro do folículo dominante sobre as taxas de ovulação e gestação de vacas da raça Gir em anestro pós-parto submetidas a protocolo hormonal com progesterona associada a estradiol
This study was done to evaluate the influence of the dominant follicle diameter at beginning of progesterone and estradiol protocol, on ovulation and pregnancy rates of 100 postpartum anestrous Gyr cows. Cows were maintained on pasture and under twice daily suckling, average 66.1 24.5 days postpartum. Animals were allocated into four treatments with 25 anima
Publicado em: 2009
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18. Influência da insulina exógena em diferentes doses sobre os parâmetros reprodutivos de cabras nulíparas da raça Anglo-nubiana. / Influence of exogenous insulin in different doses on the reproductive parameters of nulliparous goats of Anglo-nubian.
Thirty-nine nulliparous and cyclic Anglo-nubian goats were synchronized using 60 mg MPA (Progespon, Syntex, Argentina) vaginal sponge for 10 days associated with an luteolytic treatment 50 μg cloprostenol, 48 h before sponge removal (SR). Goats were allocated in three groups: Insulin I (n=13), Insulin II (n=13) and Control (n=13). In Insulin I and II gr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/07/2008
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19. Characterization of biological types of cattle: indicator traits offertility in beef cows
Genetic diversity among breeds of cattle allows producers to select animals for specific environments or market conditions. Reproductive efficiency is a multi-component trait that is largely influenced by environmental influences such as health and nutritional status; however, there are clearly genetic components to reproductive efficiency, and breed differe
Revista Brasileira de Zootecnia. Publicado em: 2008-07
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20. Desenvolvimento de um sistema fuzzy para detecção de estro em rebanhos leiteiros / Development of a fuzzy system for estrous detection
Production losses due to lack of precision in detecting estrus in dairy cows are well known and reported in milk production countries. As a result of technical progress in monitoring dairy cows using fuzzy logic automatic estrous detection has become possible by allowing the estimation of the moment of the estrous onset with minimum error. The objective of t
Publicado em: 2008
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21. SISTEMA PARA INSEMINAÇÃO ARTIFICIAL SEM OBSERVAÇÃO DE ESTRO EM VACAS DE CORTE AMAMENTANDO / ARTIFICIAL INSEMINATION SYSTEM WITHOUT ESTRUS OBSERVATION IN SUCKLED BEEF COWS
The aim of this study was to develop a timed artificial insemination system (TAI) in suckled beef cows. For this, in 227 cows 60-80 days postpartum, received estradiol benzoate (5mg) and a vaginal device containing 250mg of medroxyprogesterone acetate (MAP; day 0). On day six, prostaglandin analogous (125μg), eCG (400IU) was administered and calves were
Publicado em: 2008
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22. Detection of of porcine parvovirus (PPV) in swine fetal tissues / Pesquisa da presença de parvovirus suino (PVS) em tecidos de fetos de suinos
Swine female reproductive quality is mainly measured by return to estrus, litter size, abortion, stillbirth and mummies. Porcine parvovirus (PPV) transplacental infection is associated to fetal death at different gestacional age, and mostly with fetal mummification due to abscence of fetal immunecompetence in early pregnancy. In late gestational age, immunec
Publicado em: 2008
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23. Eficiência do uso de medidor de atividade eletrônico na detecção de cio de vacas leiteiras de alta produção / Efficiency of use of an electronic activity meter tag in the detection of estrous of high producing dairy cows
Grandes avanços tem sido feitos para melhorar a produção de leite, mas estes avanços têm resultado numa queda geral da eficiência reprodutiva. Para se combater esta queda, tem sido seguidos principalmente três caminhos: um relacionado com a vaca, outro com as gametas e outro com o ambiente. Os problemas associados à vaca compreendem os problemas rela
Publicado em: 2008
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24. HORMONAL STRATEGIES FOR ESTRUS INDUCTION/SYNCHRONIZATION IN 12-14 MONTHS OLD BEEF HEIFERS / ESTRATÉGIAS HORMONAIS DE INDUÇÃO/SINCRONIZAÇÃO DE ESTRO EM NOVILHAS DE CORTE ENTRE 12 E 14 MESES DE IDADE
The aim of this study was to develop and evaluate two protocols for estrus synchronization and/or induction in 12-14 months old beef heifers, which would allow the use of timed artificial insemination (TAI) after a short period of estrus detection (48h). The first experiment consisted of evaluating whether eCG was a necessary component in the BioRep system t
Publicado em: 2007