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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
09/04/1996 |
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Data da última atualização: |
03/04/2017 |
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Autoria: |
CHENOWETH, P. J.; RISCO, C. A.; LARSEN, R. E.; VELEZ, J.; TRAN, T.; CHASE JUNIOR, C. C. |
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Título: |
Effects of dietary gossypol on aspects of semen quality, sperm morphology and sperm production in young Brahman bulls. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Theriogenology, v.42, n.1, p.1-13, 1994. |
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Idioma: |
Inglês |
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Conteúdo: |
Eight young reproductively normal Brahman bulls (average age and bodyweight 20 monts and 500 kg, respectively) received either cottonseed meal delivering 8.2 g free gossypol/bull/d (treatment group, n=4) or soybean meal (control group, n=4) for 12 wk. After adjustment (1 wk), weekly procedures (11 wk) included blood collection, scrotal circumference measurement and electro-ejaculation. Semen assessment included sperm motility, percentage of live spermatozoa, general sperm morphology (using brighfield microscopy), and midpiece morphology (using DIC microscopy). After sacrifice (Week 12), sperm production rates (daily and per gram testicular parenchyma) were determined. Treated bulls did not differ from controls in scrotal circumference or the percentage of live spermatozoa. Sperm motility differed at Weeks 9 (P<0.05), 10 and 11 (both P=0.06). Treated bulls had fewer normal spermatozoa at weeks 5 (P<0.05), 6 (P<0.01) and 7 thru 11 (P<0.001). Beginning from Week 3, treated bulls showed an increased proportion of sperm midpiece abnormalities (P<0.05) which stabilizewd at 52 to 62.5% between Weeks 5 and 11 (P<0.01 or P<0.001). Treated bulls also had lower sperm production than untreated bulls, both on a daily (P<0.01) and per gram testicular parenchyma (P<0.001) basis. A cottonseed supplement providing 8.2 g of free gossypol per bull per day had adverse effects upon both sperm morphology and spermatogenesis in young Brahman bulls, with the former being first evident within 3 to 4 weeks of feeding of cottonseed meal. MenosEight young reproductively normal Brahman bulls (average age and bodyweight 20 monts and 500 kg, respectively) received either cottonseed meal delivering 8.2 g free gossypol/bull/d (treatment group, n=4) or soybean meal (control group, n=4) for 12 wk. After adjustment (1 wk), weekly procedures (11 wk) included blood collection, scrotal circumference measurement and electro-ejaculation. Semen assessment included sperm motility, percentage of live spermatozoa, general sperm morphology (using brighfield microscopy), and midpiece morphology (using DIC microscopy). After sacrifice (Week 12), sperm production rates (daily and per gram testicular parenchyma) were determined. Treated bulls did not differ from controls in scrotal circumference or the percentage of live spermatozoa. Sperm motility differed at Weeks 9 (P<0.05), 10 and 11 (both P=0.06). Treated bulls had fewer normal spermatozoa at weeks 5 (P<0.05), 6 (P<0.01) and 7 thru 11 (P<0.001). Beginning from Week 3, treated bulls showed an increased proportion of sperm midpiece abnormalities (P<0.05) which stabilizewd at 52 to 62.5% between Weeks 5 and 11 (P<0.01 or P<0.001). Treated bulls also had lower sperm production than untreated bulls, both on a daily (P<0.01) and per gram testicular parenchyma (P<0.001) basis. A cottonseed supplement providing 8.2 g of free gossypol per bull per day had adverse effects upon both sperm morphology and spermatogenesis in young Brahman bulls, with the former being first evident within 3 to 4... Mostrar Tudo |
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Palavras-Chave: |
Bull; Production; Reprodution. |
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Thesagro: |
Animal; Produção; Reprodução; Touro. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02262naa a2200265 a 4500
001 1788074
005 2017-04-03
008 1994 bl --- 0-- u #d
100 1 $aCHENOWETH, P. J.
245 $aEffects of dietary gossypol on aspects of semen quality, sperm morphology and sperm production in young Brahman bulls.
260 $c1994
520 $aEight young reproductively normal Brahman bulls (average age and bodyweight 20 monts and 500 kg, respectively) received either cottonseed meal delivering 8.2 g free gossypol/bull/d (treatment group, n=4) or soybean meal (control group, n=4) for 12 wk. After adjustment (1 wk), weekly procedures (11 wk) included blood collection, scrotal circumference measurement and electro-ejaculation. Semen assessment included sperm motility, percentage of live spermatozoa, general sperm morphology (using brighfield microscopy), and midpiece morphology (using DIC microscopy). After sacrifice (Week 12), sperm production rates (daily and per gram testicular parenchyma) were determined. Treated bulls did not differ from controls in scrotal circumference or the percentage of live spermatozoa. Sperm motility differed at Weeks 9 (P<0.05), 10 and 11 (both P=0.06). Treated bulls had fewer normal spermatozoa at weeks 5 (P<0.05), 6 (P<0.01) and 7 thru 11 (P<0.001). Beginning from Week 3, treated bulls showed an increased proportion of sperm midpiece abnormalities (P<0.05) which stabilizewd at 52 to 62.5% between Weeks 5 and 11 (P<0.01 or P<0.001). Treated bulls also had lower sperm production than untreated bulls, both on a daily (P<0.01) and per gram testicular parenchyma (P<0.001) basis. A cottonseed supplement providing 8.2 g of free gossypol per bull per day had adverse effects upon both sperm morphology and spermatogenesis in young Brahman bulls, with the former being first evident within 3 to 4 weeks of feeding of cottonseed meal.
650 $aAnimal
650 $aProdução
650 $aReprodução
650 $aTouro
653 $aBull
653 $aProduction
653 $aReprodution
700 1 $aRISCO, C. A.
700 1 $aLARSEN, R. E.
700 1 $aVELEZ, J.
700 1 $aTRAN, T.
700 1 $aCHASE JUNIOR, C. C.
773 $tTheriogenology$gv.42, n.1, p.1-13, 1994.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 5 | |
| 2. |  | BRAY, D. R.; FOWLER, P. A.; FIALHO, F. B.; BUCKLIN, R. A.; YERALAN, S.; TRAN, T.; BRAUN, R. K. An automated system for monitoring milking system parameters. In: INTERNATIONAL DAIRY HOUSING CONFERENCE, 4., 1998, St. Joseph. Proceddings... St. Joseph: ASAE, 1998. p.17-24 (ASAE Publication, 01.98)| Biblioteca(s): Embrapa Suínos e Aves. |
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| 3. | | FIALHO, F. B.; FOWLER, P. A.; BRAY, D. R.; BUCKLIN, R. A.; YERALAN, S.; TRAN, T.; BRAUN, R. K. A microcontroller based system for monitoring vacuum pulses in milking machines. In: JOINT MEETING FLORIDA ASAE AND SWCS, 1997, Cocoa Beach. Proceedings... St. Joseph: ASAE, 1997. 9 p. (Paper n.97-FL100)| Biblioteca(s): Embrapa Suínos e Aves. |
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| 4. | | GRUNENNVALDT, R. L.; DEGENHARDT, J.; BROOKS, P.; TOMASI, J. de C.; HANSEL, F. A.; TRAN, T.; GOMES, E. N.; DESCHAMPS, C. Callus culture as a new approach for the production of high added value compounds in Ilex paraguariensis: genotype infl uence, medium optimization and compounds identifi cation. Anais da Academia Brasileira de Ciências , v. 92, n. 3, e20181251, 2020. 16 p.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Florestas. |
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| 5. | | ANDOW, D. A.; NGUYEN, V. T.; HILBECK, A.; UNDERWOOD, E.; BIRCH, A. N. E.; DINH, Q. T.; FITT, G. P.; GIBAND, M.; WEST, J. J.; LANG, A.; LÊ, Q. Q.; LÊ, T. T. H.; LÖVEI, G. L.; NELSON, K. C.; NGUYEN, H. S.; NGUYEN, H. H.; NGUYEN, T. H.; NGUYEN, T. T. C.; NGUYEN, V. H.; NGUYEN, V. U.; PHAM, V. L.; PHAM, V. T.; SUJII, E. R.; TRAN, A. H.; TRAN, T. C. H.; VU, D. Q.; WHEATLEY, R. E.; WILSON, L. J. Challenges and opportunities with BT cotton in Vietnam: synthesis and resommendations. In: ANDOW, D. A.; HILBECK, A.; TUAT, N. V. (Ed.) Environmental risk assessment of genetically modified organisms: challenges and opportunities with BT cotton in Vietnam. Wallingford, UK: CABI Publishing, 2008. v. 4 360 p. (Environmental risk assessment of genetically modified organisms series, v. 4). p. 330-344.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| Registros recuperados : 5 | |
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