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121. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MARQUES, J. A.; FREITAS, A. R. de. Estudo do desenvolvimento fetal de bovinos pela ultra-sonografia, em modo-B, tempo real. In: CONGRESSO BRASILEIRO DE BUIATRIA, 4., 2001, Campo Grande, MS. Anais... Campo Grande: BICCA, 2001. p.40. Biblioteca(s): Embrapa Pecuária Sudeste. |
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122. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MARQUES, J. A.; FREITAS, A. R. de. Estudo do desenvolvimento fetal de bovinos pela ultra-sonografia, em modo-B, tempo real. In: CONGRESSO BRASILEIRO DE MEDICINA VETERINÁRIA; 28.; CONGRESSO INTERNACIONAL DE MEDICINA VETERINÁRIA EM LÍNGUA PORTUGUESA, 9.; CONGRESSO DO COLÉGIO BRASILEIRO DE AQUICULTURA, 2.; CONGRESSO BAIANO DE CLÍNICOS DE PEQUENOS ANIMAIS; CONGRESSO NORDESTINO DE BUIATRIA, 2001, Salvador, BA. Livros de resumos... Salvador: SBMV: SMVBA, 2001. p.242. Biblioteca(s): Embrapa Pecuária Sudeste. |
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123. | | MADALENA, F. E.; TEODORO, R. L.; LEMOS, A. de M.; MONTEIRO, J. B. N.; BARBOSA, R. T. Evaluation of strategies for crossbreeding of dairy cattle in Brazil. Journal of Dairy Science, Champaign, v. 73, n.7, p.1887-1901, 1990. Biblioteca(s): Embrapa Gado de Leite. |
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124. | | BARBOSA, P. F.; CARNEIRO, J. da C.; SILVA, A. G. da; BARBOSA, R. T.; RODRIGUES, A. de A. Evaluation of breeding strategies in a crossbred dairy cattle herd raised on a medium input production system in Brazil. In: WORLD CONGRESS APPLIED TO LIVESCTOCK PRODUCTION, 7., 2002, Montpellier, France. Papers... Montpellier: INRA, 2002. Biblioteca(s): Embrapa Pecuária Sudeste. |
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125. | | BARBOSA, P. F.; COSTA, J. L. D.; SILVA, A. G. da; BARBOSA, R. T.; RODRIGUES, A. de A. Evaluation of breeding strategies in a crossbred dairy cattle herd raised on a medium-input production system in Brazil. In: WORLD CONGRESS APPLIED TO LIVESCTOCK PRODUCTION, 7., 2002, Montpellier, France. Abstracts... Montpellier: INRA, 2002. p.338. Biblioteca(s): Embrapa Pecuária Sudeste. |
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126. | | BARBOSA, R. T.; FONSECA, V. O.; BARBOSA, P. F.; ALENCAR, M. M. de; FARIA, E. P.; MEIRELLES, C. P. Níveis plasmáticos de testosterona em touros das raças Canchim e Nelore (Plasmatic levels of testosterone in Canchim and Nellore bulls). In: CONGRESSO BRASILEIRO DE REPRODUCAO ANIMAL, 9., 1991, Belo Horizonte. Anais... Belo Horizonte: CBRA, 1991. p.322. Biblioteca(s): Embrapa Pecuária Sudeste. |
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127. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MARQUES, J. A.; FREITAS, A. R. de. Resultados de sincronização de estro em fêmeas da raça Nelore. In: CONGRESSO BRASILEIRO DE BUIATRIA, 4., 2001, Campo Grande, MS. Anais... Campo Grande: BICCA, 2001. p.41. Biblioteca(s): Embrapa Pecuária Sudeste. |
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128. | | MACHADO, R.; SILVA, J. C. B. da; BARBOSA, R. T.; BISINOTTO, R. S.; SIQUEIRA, A. E. P.; BINELLI, M. R. Remoção farmacológica ou mecânica do folículo dominante como estratégia antí-luteolítica em bovinos. Revista Acta Scientie Vetrinariae, v.34, n.(supl. 1), p. s334, 2006. Biblioteca(s): Embrapa Pecuária Sudeste. |
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132. | | BERGAMASCHI, M. A. C. M.; VICENTE, W.; BARBOSA, R. T.; MARQUES, J.; FREITAS, A. R. de; MACHADO, R. Effect of grazing system on fetal development in Nellore cattle. In: WORLD BUIATRICS CONGRESS, 2004, Québec. Proceedings...Québec: SMB, 2004. p.27. In: WORLD BUIATRICS CONGRESS, 2004, Québec. Proceedings... Québec: SMB, 2004. p.27. Biblioteca(s): Embrapa Pecuária Sudeste. |
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133. | | MELLO, S. de P.; ALENCAR, M. M. de; SILVA, L. O. C. da; BARBOSA, R. T.; BARBOSA, P. F. Estimativas de (Co)variâncias e tendências genéticas para pesos em um rebanho Canchim. Revista Brasileira de Zootecnia, Viçosa, MG, v.31, n.4, p.1707-1714, 2002. Biblioteca(s): Embrapa Gado de Corte; Embrapa Pecuária Sudeste. |
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134. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MARQUES, J. A.; FREITAS, A. R. de. Efeitos do sistema de pastejo no desenvolvimento fetal de bovinos da raça Nelore. In: CONGRESSO BRASILEIRO DE MEDICINA VETERINÁRIA; 28.; CONGRESSO INTERNACIONAL DE MEDICINA VETERINÁRIA EM LÍNGUA PORTUGUESA, 9.; CONGRESSO DO COLÉGIO BRASILEIRO DE AQUICULTURA, 2.; CONGRESSO BAIANO DE CLÍNICOS DE PEQUENOS ANIMAIS; CONGRESSO NORDESTINO DE BUIATRIA, 2001, Salvador, BA. Livro de resumos... Salvador: SBMV: SMVBA, 2001. REF-714. p.242. Biblioteca(s): Embrapa Pecuária Sudeste. |
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135. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MARQUES, A. R.; FREITAS, A. R. de. Efeitos do sistema de pastejo no desenvolvimento fetal de bovinos da raça nelore. In: CONGRESSO BRASILEIRO DE BUIATRIA, 4., 2001, Campo Grande, MS. Anais... Campo Grande: BICCA, 2001. p.42. Biblioteca(s): Embrapa Pecuária Sudeste. |
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136. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MARQUES, J. A.; FREITAS, A. R. de. Efeitos do genótipo paterno e sexo do bezerro no desenvolvimento de fetos bovinos. In: CONGRESSO BRASILEIRO DE BUIATRIA, 4., 2001, Campo Grande, MS. Anais... Campo Grande: BICCA, 2001. p.39. Biblioteca(s): Embrapa Pecuária Sudeste. |
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137. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MARQUES, J. A.; FREITAS, A. R. de. Efeitos do genótipo paterno e sexo do bezerro no desenvolvimento de fetos bovinos. In: CONGRESSO BRASILEIRO DE MEDICINA VETERINÁRIA; 28.; CONGRESSO INTERNACIONAL DE MEDICINA VETERINÁRIA EM LÍNGUA PORTUGUESA, 9.; CONGRESSO DO COLÉGIO BRASILEIRO DE AQUICULTURA, 2.; CONGRESSO BAIANO DE CLÍNICOS DE PEQUENOS ANIMAIS; CONGRESSO NORDESTINO DE BUIATRIA, 2001, Salvador, BA. Livros de resumos... Salvador: SBMV: SMVBA, 2001. p.242. Biblioteca(s): Embrapa Pecuária Sudeste. |
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138. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MARQUES, J. A.; FREITAS, A. R. de. Efeitos dos perfis plasmáticos maternos de triiodotironina e tiroxina, em fêmeas Nelore, no desenvolvimento de fetos bovinos. In: CONGRESSO BRASILEIRO DE BUIATRIA, 4., 2001, Campo Grande, MS. Anais... Campo Grande: BICCA, 2001. p.43. Biblioteca(s): Embrapa Pecuária Sudeste. |
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Registros recuperados : 217 | |
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Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
17/07/2003 |
Data da última atualização: |
28/06/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
BRITO, L. F. C.; SILVA, A. E. D. F.; BARBOSA, R. T.; UNANIAN, M. M.; KASTELIC, J. P. |
Afiliação: |
LEONARDO F. C. BRITO; ANTONIO EMIDIO DIAS FELICIANO SILVA, CPPSE, SÃO CARLOS, SP.; ROGERIO TAVEIRA BARBOSA, CPPSE; MARIA MARINA UNANIAN, CPPSE, SÃO CARLOS, SP.; JOHN P. KASTELIC. |
Título: |
Effects of scrotal insulation on sperm production semen quality and testicular echotexture in bos indicus and Bos indicus x Bos taurus bulls. |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
Animal Reproduction Science, v. 79, n. 1, p. 1-15, 2003. |
DOI: |
10.1016/S0378-4320(03)00082-4 |
Idioma: |
Inglês |
Conteúdo: |
The objectives of the present study were to evaluate the effects of scrotal insulation on sperm production, semen quality, and testicular echotexture in Bos indicus and Bos indicus × Bos taurus crossbred bulls. In one experiment, B. indicus bulls (n=12) were allocated to control and whole-scrotum insulation groups, while in a second experiment, crossbred bulls (n=21) were allocated into control, whole-scrotum, and scrotal-neck insulation groups. Insulation was applied for 4 days (start of insulation = Day 0) and semen collection and testicular ultrasonographic examinations were performed twice weekly until Day 35. Sperm concentration and total sperm output during the post-insulation period were greater in control groups, but significant differences were observed only in B. indicus bulls. Overall, sperm motility in scrotal-insulated B. indicus bulls was lower (P<0.05) than in the control group. After whole-scrotum insulation in crossbred bulls, sperm motility was lower (P<0.05) than pre-insulation levels between Days 21 and 31, and lower than control levels on Day 24. The proportion of normal sperm after whole-scrotum insulation was lower than pre-insulation and control values from Day 11 to the end of the experiment in B. indicus bulls (P<0.05 from Days 14 to 21 and on Day 27), and from Days 14 to 25 in crossbred bulls (P<0.05 on Days 14 and 18). Insulation of the scrotal neck in crossbred bulls did not significantly affect semen quality. Loose sperm heads (Day 11), midpiece defects (Days 11 and 14), and acrosome defects (Days 27 and 31) increased (P<0.05) in insulated B. indicus bulls, while proximal cytoplasmic droplets (Days 14, 18 and 27 in B. indicus; Days 24 and 27 in crossbred bulls) and sperm vacuoles (Days 18 and 21 in B. indicus; Day 18 in crossbred bulls) increased (P<0.05) in whole-scrotum insulation groups in both experiments. There was considerable variation among bulls in the incidence of specific sperm defects. The timing of appearance of sperm defects after insulation provided insights into the pathogenesis of specific abnormalities. Neither whole-scrotum nor scrotal-neck insulation affected testicular echotexture in either experiment. In conclusion, whole-scrotum insulation resulted in decreased sperm production and semen quality in B. indicus and B. indicus × B. taurus bulls, but those changes were not associated with changes in testicular echotexture. MenosThe objectives of the present study were to evaluate the effects of scrotal insulation on sperm production, semen quality, and testicular echotexture in Bos indicus and Bos indicus × Bos taurus crossbred bulls. In one experiment, B. indicus bulls (n=12) were allocated to control and whole-scrotum insulation groups, while in a second experiment, crossbred bulls (n=21) were allocated into control, whole-scrotum, and scrotal-neck insulation groups. Insulation was applied for 4 days (start of insulation = Day 0) and semen collection and testicular ultrasonographic examinations were performed twice weekly until Day 35. Sperm concentration and total sperm output during the post-insulation period were greater in control groups, but significant differences were observed only in B. indicus bulls. Overall, sperm motility in scrotal-insulated B. indicus bulls was lower (P<0.05) than in the control group. After whole-scrotum insulation in crossbred bulls, sperm motility was lower (P<0.05) than pre-insulation levels between Days 21 and 31, and lower than control levels on Day 24. The proportion of normal sperm after whole-scrotum insulation was lower than pre-insulation and control values from Day 11 to the end of the experiment in B. indicus bulls (P<0.05 from Days 14 to 21 and on Day 27), and from Days 14 to 25 in crossbred bulls (P<0.05 on Days 14 and 18). Insulation of the scrotal neck in crossbred bulls did not significantly affect semen quality. Loose sperm heads (Day 11), midpiece... Mostrar Tudo |
Palavras-Chave: |
Bull; Scrotal insulation; Sperm; Ultrasound. |
Thesagro: |
Sêmen. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 03181naa a2200241 a 4500 001 1046442 005 2023-06-28 008 2003 bl uuuu u00u1 u #d 024 7 $a10.1016/S0378-4320(03)00082-4$2DOI 100 1 $aBRITO, L. F. C. 245 $aEffects of scrotal insulation on sperm production semen quality and testicular echotexture in bos indicus and Bos indicus x Bos taurus bulls.$h[electronic resource] 260 $c2003 520 $aThe objectives of the present study were to evaluate the effects of scrotal insulation on sperm production, semen quality, and testicular echotexture in Bos indicus and Bos indicus × Bos taurus crossbred bulls. In one experiment, B. indicus bulls (n=12) were allocated to control and whole-scrotum insulation groups, while in a second experiment, crossbred bulls (n=21) were allocated into control, whole-scrotum, and scrotal-neck insulation groups. Insulation was applied for 4 days (start of insulation = Day 0) and semen collection and testicular ultrasonographic examinations were performed twice weekly until Day 35. Sperm concentration and total sperm output during the post-insulation period were greater in control groups, but significant differences were observed only in B. indicus bulls. Overall, sperm motility in scrotal-insulated B. indicus bulls was lower (P<0.05) than in the control group. After whole-scrotum insulation in crossbred bulls, sperm motility was lower (P<0.05) than pre-insulation levels between Days 21 and 31, and lower than control levels on Day 24. The proportion of normal sperm after whole-scrotum insulation was lower than pre-insulation and control values from Day 11 to the end of the experiment in B. indicus bulls (P<0.05 from Days 14 to 21 and on Day 27), and from Days 14 to 25 in crossbred bulls (P<0.05 on Days 14 and 18). Insulation of the scrotal neck in crossbred bulls did not significantly affect semen quality. Loose sperm heads (Day 11), midpiece defects (Days 11 and 14), and acrosome defects (Days 27 and 31) increased (P<0.05) in insulated B. indicus bulls, while proximal cytoplasmic droplets (Days 14, 18 and 27 in B. indicus; Days 24 and 27 in crossbred bulls) and sperm vacuoles (Days 18 and 21 in B. indicus; Day 18 in crossbred bulls) increased (P<0.05) in whole-scrotum insulation groups in both experiments. There was considerable variation among bulls in the incidence of specific sperm defects. The timing of appearance of sperm defects after insulation provided insights into the pathogenesis of specific abnormalities. Neither whole-scrotum nor scrotal-neck insulation affected testicular echotexture in either experiment. In conclusion, whole-scrotum insulation resulted in decreased sperm production and semen quality in B. indicus and B. indicus × B. taurus bulls, but those changes were not associated with changes in testicular echotexture. 650 $aSêmen 653 $aBull 653 $aScrotal insulation 653 $aSperm 653 $aUltrasound 700 1 $aSILVA, A. E. D. F. 700 1 $aBARBOSA, R. T. 700 1 $aUNANIAN, M. M. 700 1 $aKASTELIC, J. P. 773 $tAnimal Reproduction Science$gv. 79, n. 1, p. 1-15, 2003.
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