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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
14/09/2018 |
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Data da última atualização: |
15/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ROMANELLO, N.; LOURENÇO JUNIOR, J. de B.; BARIONI JUNIOR, W.; BRANDÃO, F. Z.; MARCONDES, C. R.; PEZZOPANE, J. R. M.; PANTOJA, M. H. de A.; BOTTA, D.; GIRO, A.; MOURA, A. B. B.; BARRETO, A. do N.; GARCIA, A. R. |
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Afiliação: |
Narian Romanello, UFPA; José de Brito Lourenço Junior, UFPA; WALDOMIRO BARIONI JUNIOR, CPPSE; Felipe Zandonadi Brandão, UFF; CINTIA RIGHETTI MARCONDES, CPPSE; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; Messy Hannear de Andrade Pantoja, UFPA; Daniela Botta, UFPA; Alessandro Giro, UFPA; Ana Beatriz Bossois Moura, UFF; Andréa do Nascimento Barreto, UFPA; ALEXANDRE ROSSETTO GARCIA, CPPSE. |
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Título: |
Thermoregulatory responses and reproductive traits in composite beef bulls raised in a tropical climate. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
International Journal of Biometeorology, v.62, p.1575-1586, 2018. |
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DOI: |
https://doi.org/10.1007/s00484-018-1557-8 |
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Idioma: |
Português |
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Conteúdo: |
It is believed that increased livestock production is limited by tropical climate. Thermal imbalance in bulls can lead to hyperthermia and alter testicularmetabolism, causing subfertility or infertility. Therefore, the thermoregulation of composite Canchim bulls (5/8 Charolais × 3/8 Zebu) raised in tropical climate as well as their consequences in the physiological, hematological, hormonal, and andrological parameters were evaluated monthly. The bulls (n = 18; 30.0 ± 1.5 months; 503.8 ± 23.0 kg) were kept on pasture, in a single group, from August 2015 to March 2016, comprising the winter, spring, and summer seasons. Biometeorological variables were continuously monitored, and the Temperature and Humidity Index (THI) was calculated. A greater thermal challenge occurred in spring and summer (THI ? 72.0). Nevertheless, the bulls exhibited normothermia (38.6 to 38.9 °C) in these seasons. The cortisol did not vary between seasons (7.0 vs. 8.7 vs. 6.8 ng/ mL; P > 0.05) and remained within the physiological patterns. Independent of the seasons, stress leukogram was also not observed, refuting the incidence of acute or chronic thermal stress. It is noteworthy that T3 and testosterone increased (P < 0.0001, P < 0.05) in spring and summer, the time that coincides with the breeding season, when there is increased metabolic requirement from the bulls. The progressive thermal challenge increase did not affect the scrotal thermoregulatory capacity, and in general, scrotal temperature remained at 5.2 °C below the internal body temperature. In summer, there was a 5% reduction in the minor sperm defects (P < 0.05) and DNA fragmentation in 2.4% of spermatozoa, a compatible value for high fertility bulls. The results show that the studied composite bulls can be considered as climatically adapted and constitute a viable alternative to be used in production systems in a tropical climate, even if the breeding seasons occur during the most critical thermal condition periods of the year. MenosIt is believed that increased livestock production is limited by tropical climate. Thermal imbalance in bulls can lead to hyperthermia and alter testicularmetabolism, causing subfertility or infertility. Therefore, the thermoregulation of composite Canchim bulls (5/8 Charolais × 3/8 Zebu) raised in tropical climate as well as their consequences in the physiological, hematological, hormonal, and andrological parameters were evaluated monthly. The bulls (n = 18; 30.0 ± 1.5 months; 503.8 ± 23.0 kg) were kept on pasture, in a single group, from August 2015 to March 2016, comprising the winter, spring, and summer seasons. Biometeorological variables were continuously monitored, and the Temperature and Humidity Index (THI) was calculated. A greater thermal challenge occurred in spring and summer (THI ? 72.0). Nevertheless, the bulls exhibited normothermia (38.6 to 38.9 °C) in these seasons. The cortisol did not vary between seasons (7.0 vs. 8.7 vs. 6.8 ng/ mL; P > 0.05) and remained within the physiological patterns. Independent of the seasons, stress leukogram was also not observed, refuting the incidence of acute or chronic thermal stress. It is noteworthy that T3 and testosterone increased (P < 0.0001, P < 0.05) in spring and summer, the time that coincides with the breeding season, when there is increased metabolic requirement from the bulls. The progressive thermal challenge increase did not affect the scrotal thermoregulatory capacity, and in general, scrotal temperature rem... Mostrar Tudo |
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Palavras-Chave: |
Homeothermy; Infrared thermography; Semen quality; Tropical livestock. |
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Thesagro: |
Sêmen. |
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Thesaurus Nal: |
Animal welfare; Thermoregulation. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 03072naa a2200349 a 4500
001 2095682
005 2023-12-15
008 2018 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s00484-018-1557-8$2DOI
100 1 $aROMANELLO, N.
245 $aThermoregulatory responses and reproductive traits in composite beef bulls raised in a tropical climate.$h[electronic resource]
260 $c2018
520 $aIt is believed that increased livestock production is limited by tropical climate. Thermal imbalance in bulls can lead to hyperthermia and alter testicularmetabolism, causing subfertility or infertility. Therefore, the thermoregulation of composite Canchim bulls (5/8 Charolais × 3/8 Zebu) raised in tropical climate as well as their consequences in the physiological, hematological, hormonal, and andrological parameters were evaluated monthly. The bulls (n = 18; 30.0 ± 1.5 months; 503.8 ± 23.0 kg) were kept on pasture, in a single group, from August 2015 to March 2016, comprising the winter, spring, and summer seasons. Biometeorological variables were continuously monitored, and the Temperature and Humidity Index (THI) was calculated. A greater thermal challenge occurred in spring and summer (THI ? 72.0). Nevertheless, the bulls exhibited normothermia (38.6 to 38.9 °C) in these seasons. The cortisol did not vary between seasons (7.0 vs. 8.7 vs. 6.8 ng/ mL; P > 0.05) and remained within the physiological patterns. Independent of the seasons, stress leukogram was also not observed, refuting the incidence of acute or chronic thermal stress. It is noteworthy that T3 and testosterone increased (P < 0.0001, P < 0.05) in spring and summer, the time that coincides with the breeding season, when there is increased metabolic requirement from the bulls. The progressive thermal challenge increase did not affect the scrotal thermoregulatory capacity, and in general, scrotal temperature remained at 5.2 °C below the internal body temperature. In summer, there was a 5% reduction in the minor sperm defects (P < 0.05) and DNA fragmentation in 2.4% of spermatozoa, a compatible value for high fertility bulls. The results show that the studied composite bulls can be considered as climatically adapted and constitute a viable alternative to be used in production systems in a tropical climate, even if the breeding seasons occur during the most critical thermal condition periods of the year.
650 $aAnimal welfare
650 $aThermoregulation
650 $aSêmen
653 $aHomeothermy
653 $aInfrared thermography
653 $aSemen quality
653 $aTropical livestock
700 1 $aLOURENÇO JUNIOR, J. de B.
700 1 $aBARIONI JUNIOR, W.
700 1 $aBRANDÃO, F. Z.
700 1 $aMARCONDES, C. R.
700 1 $aPEZZOPANE, J. R. M.
700 1 $aPANTOJA, M. H. de A.
700 1 $aBOTTA, D.
700 1 $aGIRO, A.
700 1 $aMOURA, A. B. B.
700 1 $aBARRETO, A. do N.
700 1 $aGARCIA, A. R.
773 $tInternational Journal of Biometeorology$gv.62, p.1575-1586, 2018.
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Embrapa Pecuária Sudeste (CPPSE) |
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| 25. |  | ATHAYDE SOBRINHO, C.; CAVALCANTI, L. S.; BRUNELLI, K. R.; MENTEN, J. O. M. Dinâmica de fenilalanina amonia-liase e peroxidase em feijão-caupi tratado com Acibenzolar-S-Metil. In: CONGRESSO NACIONAL DE FEIJÃO-CAUPI, 1.; REUNIÃO NACIONAL DE FEIJÃO-CAUPI, 6., 2006, Teresina. Tecnologias para o agronegócio: anais. Teresina: Embrapa Meio-Norte, 2006. 1 CD-ROM. (Embrapa Meio-Norte. Documentos, 121).| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 28. | | ATHAYDE SOBRINHO, C.; BRUNELLI, K. R.; MORAES, M. H. D.; MENTEN, J. O. M. Efeito do congelamento e da restrição hídrica como inibidores da germinação de sementes sobre a detecção de Macrophomina phaseolina (Tass.) Goid. em sementes de caupi (Vigna unguiculata (L.) Walp.). Informativo ABRATES, Londrina, v. 13, n. 3, p. 231, set. 2003. Número especial, ref. 338. Edição dos Resumos do XIII Congresso Brasileiro de Sementes, Gramado, RS, set. 2003.| Biblioteca(s): Embrapa Meio-Norte. |
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| 29. | | ATHAYDE SOBRINHO, C.; BRUNELLI, K. R.; MORAES, H. M. D.; MENTEN, J. O. M. Detecção de Macrophomina phaseolina em sementes de feijão-caupi. In: CONGRESSO NACIONAL DE FEIJÃO-CAUPI, 1.; REUNIÃO NACIONAL DE FEIJÃO-CAUPI, 6., 2006, Teresina. Tecnologias para o agronegócio: anais. Teresina: Embrapa Meio-Norte, 2006. 1 CD-ROM. (Embrapa Meio-Norte. Documentos, 121).| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 30. | | ATHAYDE SOBRINHO, C.; DEZORDI, C.; MORAES, M. H. D.; MENTEN, J. O. M. Restrição hídrica como alternativa ao método do papel de filtro com congelamento em testes de sanidade de sementes de caupi. Fitopatologia Brasileira, Brasília, DF, v. 27, p. S226-S227, ago. 2002. Item 786, Suplemento. Edição das Palestras e Resumos do 35° Congresso Brasileiro de Fitopatologia, 2002.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 38. | | NASCIMENTO, W. M. O. do; CRUZ, E. D.; MENTEN, J. O. M.; MORAES, M. H. D. Fungos associados às sementes de espécies florestais nativas. Informativo ABRATES, Londrina, v. 13, n. 3, p. 253, set. 2003. Número especial, ref. 383. Edição dos Resumos do XIII Congresso Brasileiro de Sementes, Gramado, RS, set. 2003.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 40. | | SARTORATO, A.; MENTE, E. M.; MENTEN, J. O. M.; FANCELLI, A. L. Quantificação de doenças de milho em dois sistemas de preparo do osolo. Fitopatologia Brasileira, v. 13, p. 144, jul. 1988. Suplemento, ref. 283. Edição dos Resumos do XXI Congresso Brasileiro de Fitopatologia, Salvador, jul. 1988.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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