Breeding Soundness Evaluation
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Testicular needle aspiration: Is it a safe method for breeding soundness evaluation in bulls?
Abstract The aim of this study was to evaluate the impact of successive bovine testicular punctures using different needle sizes. Fifteen bulls were submitted to testicular needle aspiration (TNA) in the left and right testis using 18-gauge (40×12mm) or 22-gauge (25×7mm) needles, respectively, once every 30 days. Animals were randomly divided into three gr
Anim. Reprod.. Publicado em: 25/11/2019
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2. Parâmetros reprodutivos de touros Nelore (Bos taurus indicus) criados a pasto, em de diferentes faixas etárias
RESUMO Este estudo teve o objetivo de demonstrar o efeito da idade sobre as características de circunferência escrotal, cor de pelagem e qualidade seminal, desde a puberdade até após a maturidade sexual. Foram utilizados dados de 6607 exames andrológicos de touros da raça Nelore criados a pasto. Os animais eram de diferentes faixas etárias, variando d
Arq. Bras. Med. Vet. Zootec.. Publicado em: 06/06/2019
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3. A bull breeding soundness evaluation system with greater emphasis on scrotal circumference
Abstract: Bull breeding soundness evaluation (BBSE) is a method applied to reduce the risk of using subfertile bulls in herds. There are currently two BBSE systems, those of the Society for Theriogenology (SFT) and the Western Canadian Association of Bovine Practitioners (WCABP). Scrotal circumference (SC), sperm motility (SM) and normal sperm (NS) of 454 bu
Pesq. Vet. Bras.. Publicado em: 2015-09
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4. Reproductive success or failure in four breed groups of beef bulls
The objective of this study was to determine the main causes of failure in bull breeding using a soundness evaluation in Rio Grande do Sul State/Brazil. We evaluated 19,836 bulls from 15 different breeds with ages ranging from two to eight years. The failures of bulls in each step were analyzed by logistic regression. The binary logistic regression was appli
R. Bras. Zootec.. Publicado em: 2015-07
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5. Testicular echotexture and seminal quality of young Montana Tropical Compound bulls classified as sound and unsound for breeding
The objective of this study was to investigate the relationship between testicular echotexture and seminal quality, in addition to evaluate the testicular parenchyma echogenicity pattern in young Montana bulls classified as sound and unsound for breeding. Fifty-two young Montana Tropical Compound bulls from 22 to 33 months of age were used. The animals were
R. Bras. Zootec.. Publicado em: 2012-08
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6. Causes of rejection of beef bulls in breeding soundness evaluation
The objective of this study was to analyze the rates of rejection in the different steps of the breeding soundness evaluation of beef bulls in the state of Rio Grande do Sul, Brazil. The breeding soundness of 22,113 young and mature bulls of 14 beef breeds, participating in the Program of Reproductive Evaluation (PARTO) was evaluated in the experiment. Data
Revista Brasileira de Zootecnia. Publicado em: 2012-07
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7. Leptin and insulin in the seminal plasma of zebu bulls in peripuberty
In order to determine the profile of leptin and insulin values in seminal plasma and their correlations with sperm patterns during the peripuberty, a total of 16 crossbred Gyr dairy bulls were monitored from 60 days before to 60 days after puberty, separated into two groups, early and regular, according to the onset of puberty. Hormone values were determined
Revista Brasileira de Zootecnia. Publicado em: 2012-04
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8. Ultrassonografia testicular na avaliação andrológica de touros da raça nelore e composto montana tropical / Testicular ultrasonography in breeding soundness evaluation in nelore and montana tropical compound bulls
O objetivo deste trabalho foi estudar o padrão de ecogenicidade testicular de touros jovens em diferentes estádios de maturidade sexual, além da relação da ecotextura testicular e do grau de comprometimento provocado por lesões fibróticas, com a qualidade seminal de touros adultos da raça Nelore e Composto Montana Tropical. Foram utilizados 405 touro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/10/2010
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9. Reproductive deficiency in bulls from synthetic breeds according to the type of crossbreed and the morphology of the Y chromosome
We used 550 Braford and 214 Brangus-lbagé bulls to study the association between Y chromosome morphology and the evaluation of breeding-soundness, karyotyping and breeding records were used to assess Y chromosome morphology. In general, no direct association was detected between the individual type of Y chromosome and reproductive fitness as previously esti
Publicado em: 2010
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10. Complemental tests in semen and evaluation of the anionic proteins and peptides differentially synthesized in seminal plasma of Nelore bulls classified as sound and unsound for breeding / Testes complementares em sêmen e avaliação da síntese diferencial de proteínas e peptídeos aniônicos em plasma seminal de touros da raça Nelore classificados em aptos e inaptos à reprodução
The main analyses performed routinely to assess the sperm quality are the spermatic motility and morphology for the measurement bulls fertility. Several complementary techniques are used to improve bulls fertility evaluation. Each technique is related to different aspects of sperm quality and their results are not yet fully understood. Four experiments were
Publicado em: 2009
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11. Alternativas para maximizar a capacidade reprodutiva de bovinos / Alternatives to maximize bovine reproductive capacity
O objetivo deste trabalho foi avaliar a capacidade reprodutiva de touros da raça Devon, criados em Santa Catarina, bem como propor alternativas para maximizar a capacidade produtiva de bovinos de corte. Os conteúdos foram agrupados em quatro capítulos. No Capítulo 1, procedeu-se a revisão bibliográfica do exame andrológico do touro, incluindo o exame
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/06/2007
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12. Reproductive deficiency in bulls from synthetic breeds according to the type of crossbreed and the morphology of the Y chromosome
We used 550 Braford and 214 Brangus-Ibagé bulls to study the association between Y chromosome morphology and the evaluation of breeding-soundness, karyotyping and breeding records were used to assess Y chromosome morphology. In general, no direct association was detected between the individual type of Y chromosome and reproductive fitness as previously esti
Genetics and Molecular Biology. Publicado em: 2005