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| Registros recuperados : 78 | |
| 3. |  | CAVALCANTE, D. H.; EVANGELISTA, A. F.; CAMPELO, J. E. G.; AZEVEDO, D. M. M. R.; SOUSA JÚNIOR, S. C. Funções de covariâncias sobre polinômios B-splines para modelagem do crescimento de bovinos de corte: revisão. Medicina Veterinária, Recife, v. 14, n. 1, p. 57-63, jan./mar. 2020.| Biblioteca(s): Embrapa Meio-Norte. |
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| 5. | | MARTINS JÚNIOR, L. M.; COSTA, A. P. R.; AZEVÊDO, D. M. M. R.; CAMPELO, J. E. G.; LIMA, S. Temperatura retal no período seco e chuvoso das raças Boer e Anglo-Nubiana em Timon, MA. In: CONGRESSO BRASILEIRO DE MEDICINA VETERINÁRIA, 31., 2004, São luis. A medicina veterinária no novo milênio: transformação social, preservação ambiental e segurança alimentar: resumos. São Luis, Sociedade Brasileira de Medicina Veterinária, 2004. Seção produção animal e agronegócio. 1 CD-ROM.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 6. | | MARTINS JÚNIOR, L. M.; COSTA, A. P. R.; AZEVÊDO, D. M. M. R.; CAMPELO, J. E. G.; LIMA, S. Freqüência respiratória das raça Boer e Anglo-Nubiana no período seco e chuvoso em Timon, MA. In: CONGRESSO BRASILEIRO DE MEDICINA VETERINÁRIA, 31., 2004, São luis. A medicina veterinária no novo milênio: transformação social, preservação ambiental e segurança alimentar: resumos. São Luis, Sociedade Brasileira de Medicina Veterinária, 2004. Seção produção animal e agronegócio. 1 CD-ROM.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 10. | | ROCHA, M. de M.; CAMPELO, J. E. G.; FREIRE FILHO, F. R.; RIBEIRO, V. Q.; LOPES, A. C. de A. Estimativas de parâmetros genótipos de caupi de tegumento branco. Revista Ciêntifica Rural, Bagé, v. 8, n. 1, p. 135-141, 2002.| Biblioteca(s): Embrapa Hortaliças. |
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| 12. | | MOURA, J. de O.; CAMPELO, J. E. G.; BAJAY, M. M.; SARMENTO, J. L. R.; ARAUJO, A. M. de. Population genomics and gene introgression in goat herds naturally adapted to Brazil. Revista Ciência Agronômica, Fortaleza, v. 50, n. 3, p. 476-483, jul./set. 2019.| Biblioteca(s): Embrapa Meio-Norte. |
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| 13. | | ROCHA, M. de M.; FREIRE FILHO, F. R.; CAMPELO, J. E. G.; RIBEIRO, V. Q.; ROSAL, C. J. de S. Variabilidade genetica, herdabilidade e correlacoes em caupi (Vigna unguiculata (L.) Walp.) de tegumento branco. In: ENCONTRO DE GENETICA DO NORDESTE, 11., 1995, Natal. Resumos. Natal: UFRN, 1995. p. 54.| Biblioteca(s): Embrapa Meio-Norte. |
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| 14. | | COSTA, M. da S.; BRANCO, J. da F. C.; ARAÚJO, A. M. de; CAMPELO, J. E. G.; MACHADO, T. M. M.; SARMENTO, J. L.; EGITO, A. A. do. Levantamento geográfico de caprinos Nambi no Estado Piaurí-Brasil. In: SIMPÓSIO DE RECURSOS GENÉTICOS PARA AMÉRICA LATINA Y EL CARIBE, SIRGEALC, 7, 2009, Pucón, Chile. Proceeding... Santiago de Chile: Ministério de Agricultura, Instituto de Investigaciones Agropecuarias, 2009. p. 165-166 Titulo: Piaurí [i. e. Piauí], Brasil.| Biblioteca(s): Embrapa Meio-Norte. |
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| 15. | | COSTA, M. da S.; ARAUJO, A. M. de; BRANCO, J. da F. C.; CAMPELO, J. E. G.; EGITO, A. A. do; MACHADO, T. M. M.; PIRES, L. C. Levantamento populacional da raça gurguéia no estado do Piauí. In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS; WORKSHOP EM BIOPROSPECÇÃO E CONSERVAÇÃO DE PLANTAS NATIVAS DO SEMI-ÁRIDO, 3.; WORKSHOP INTERNACIONAL SOBRE BIOENERGIA E MEIO AMBIENTE, 2010, Salvador. Bancos de germoplasma: descobrir a riqueza, garantir o futuro: anais. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2010. CD-ROM| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 16. | | COSTA, M. da S.; ARAUJO, A. M. de; CAMPELO, J. E. G.; MACHADO, T. M. M; PIRES, L. C.; EGITO, A. A. do; MARIANTE, A. da S. Inventário e caracterização morfológica de caprinos Gurgueia no Estado do Piauí. Revista Brasileira de Saúde e Produção Animal, Salvador, v. 17, n. 2, p. 127-138, abr./jun. 2016.| Biblioteca(s): Embrapa Gado de Corte; Embrapa Meio-Norte; Embrapa Recursos Genéticos e Biotecnologia. |
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| 17. | | CAMPELO, J. E. G.; LOPES, P. S.; TORRES, R. de A.; SILVA, L. O. C. da; EUCLYDES, R, F.; ARAUJO, C. V. de; PEREIRA, C. S. Ajustamento da heterogeneidade de variancias por transformacao de escala em caracteristicas de crescimento de bovinos da raca Tabapua. Revista Ceres, Vicosa, v. 49, n. 285, p. 481-494, 2002 CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| 18. | | CAMPÊLO, J. E. G.; LOPES, P. S.; TORRES, R. de A.; SILVA, L. O. C.; EUCLYDES, R. F.; ARAÚJO, C. V. de; PEREIRA, C. S. Ajustamento para heterogeneidade de variâncias por transformação de escala em características de crescimento na raça Tabapuã. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 38., 2001, Piracicaba. Anais... Piracicaba: FEALQ, 2001. p. 523-524. CNPGC. SBZ.| Biblioteca(s): Embrapa Gado de Corte. |
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| 19. | | MARTINS JÚNIOR, L. M.; COSTA, A. P. R.; AZEVÊDO, D. M. M. R.; TURCO, S. H. N.; CAMPELO, J. E. G.; MURATORI, M. C. S. Adaptabilidade de caprinos Boer e Anglo-Nubiana às condições climáticas do Meio-Norte do Brasil. Archivos de Zootecnia, v. 56, n. 214, p. 103-113, 2007.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 20. | | MARTINS JÚNIOR, L. M.; COSTA, A. P. R.; AZEVÊDO, D. M. M. R.; TURCO, S. H. N.; CAMPELO, J. E. G.; MURATORI, M. C. S. Adaptabilidade de caprinos Boer e Anglo-Nubiana às condições climáticas do Meio-Norte do Brasil. Archivos de Zootecnia, v. 56, n. 214, p.103-113, 2007.| Biblioteca(s): Embrapa Meio Norte / UEP-Parnaíba; Embrapa Meio-Norte. |
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| Registros recuperados : 78 | |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
21/12/2021 |
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Data da última atualização: |
21/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
LIMA, C. M. M.; TOMAZELLA, V. L. D.; CAMPELO, J. E. G.; A. FILHO, J. L.; BARIONI JUNIOR, W.; SOUSA JUNIOR, S. C. |
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Afiliação: |
CLEIDE M. M. LIMA, Federal University of Piauí; VERA L. D. TOMAZELLA, UFSCAR; JOSE E. G. CAMPELO, Federal University of Piauí; JOAO L. A. FILHO, Federal University of Piauí; WALDOMIRO BARIONI JUNIOR, CPPSE; SEVERINO C. SOUSA JUNIOR, Federal University of the Parnaíba. |
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Título: |
Gamma-Gompertz shared frailty model for analysis of the time of stay in an Anglo-Nubian goat herd. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Small Ruminant Research, v.199, jun. 2021, 106368. |
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Páginas: |
11 p. |
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DOI: |
https://doi.org/10.1016/j.smallrumres.2021.106368 |
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Idioma: |
Inglês |
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Conteúdo: |
Goats, even though adapted to tropical environments, are exposed to infection by endoparasites during grazing, which can negatively affect the time a female stays in the herd, compromising the breeding efficiency. In this context, the objective of this study was to evaluate a gamma-Gompertz shared frailty model for correction of unobserved heterogeneity attributed to the effects of unmeasured factors in analyzing the time of stay in a herd of Anglo-Nubian goats, using the survival analysis technique. The method was applied using data from records of 101 does born in the period 2009?2013 in an experimental herd located in the municipality of Teresina, Piauí, Brazil, where the replacement was carried out over four generations, with bulls from other herds and females incorporated regardless of the value of their EPG exam, to increase the variation of sensitivity to worms in the herd. The removal of a doe due to death caused by worm infection was considered the event of interest (failure) and losses due to other causes were considered censored events. According to the model selection criteria (AIC and BIC), the shared gamma-Gompertz frailty model stood out from the gamma shared frailty models with risk functions based on the Weibull and log-logistic distributions for the proposal studied. The gamma-Gompertz shared frailty model (with and without effect of observed factors) allowed observing a significant influence of the of year-season effect, indicating as frailty effects the differentiated death tendency between years (does born in 2011 in the rainy season and 2012 in the more fragile dry season). When associating the random effect to groups formed by goats descended from the same father, a significant association was observed between the times of goats belonging to such groups, with only 2 bulls showing more fragile daughters and consequently less permanence in the herd. The use of frailty models is relevant to meet the objectives of animal husbandry, as a technique to identify frailties due to the effects of factors that are difficult or costly to measure in bulls classified as having high genetic value. The simplicity and presentation of results in the form of graphs that are easy to understand make the method attractive for this type of research. MenosGoats, even though adapted to tropical environments, are exposed to infection by endoparasites during grazing, which can negatively affect the time a female stays in the herd, compromising the breeding efficiency. In this context, the objective of this study was to evaluate a gamma-Gompertz shared frailty model for correction of unobserved heterogeneity attributed to the effects of unmeasured factors in analyzing the time of stay in a herd of Anglo-Nubian goats, using the survival analysis technique. The method was applied using data from records of 101 does born in the period 2009?2013 in an experimental herd located in the municipality of Teresina, Piauí, Brazil, where the replacement was carried out over four generations, with bulls from other herds and females incorporated regardless of the value of their EPG exam, to increase the variation of sensitivity to worms in the herd. The removal of a doe due to death caused by worm infection was considered the event of interest (failure) and losses due to other causes were considered censored events. According to the model selection criteria (AIC and BIC), the shared gamma-Gompertz frailty model stood out from the gamma shared frailty models with risk functions based on the Weibull and log-logistic distributions for the proposal studied. The gamma-Gompertz shared frailty model (with and without effect of observed factors) allowed observing a significant influence of the of year-season effect, indicating as frailty effects the d... Mostrar Tudo |
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Palavras-Chave: |
Shared frailty; Survival; Worms. |
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Thesaurus NAL: |
Longevity. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 03055naa a2200253 a 4500
001 2138132
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008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.smallrumres.2021.106368$2DOI
100 1 $aLIMA, C. M. M.
245 $aGamma-Gompertz shared frailty model for analysis of the time of stay in an Anglo-Nubian goat herd.$h[electronic resource]
260 $c2021
300 $a11 p.
520 $aGoats, even though adapted to tropical environments, are exposed to infection by endoparasites during grazing, which can negatively affect the time a female stays in the herd, compromising the breeding efficiency. In this context, the objective of this study was to evaluate a gamma-Gompertz shared frailty model for correction of unobserved heterogeneity attributed to the effects of unmeasured factors in analyzing the time of stay in a herd of Anglo-Nubian goats, using the survival analysis technique. The method was applied using data from records of 101 does born in the period 2009?2013 in an experimental herd located in the municipality of Teresina, Piauí, Brazil, where the replacement was carried out over four generations, with bulls from other herds and females incorporated regardless of the value of their EPG exam, to increase the variation of sensitivity to worms in the herd. The removal of a doe due to death caused by worm infection was considered the event of interest (failure) and losses due to other causes were considered censored events. According to the model selection criteria (AIC and BIC), the shared gamma-Gompertz frailty model stood out from the gamma shared frailty models with risk functions based on the Weibull and log-logistic distributions for the proposal studied. The gamma-Gompertz shared frailty model (with and without effect of observed factors) allowed observing a significant influence of the of year-season effect, indicating as frailty effects the differentiated death tendency between years (does born in 2011 in the rainy season and 2012 in the more fragile dry season). When associating the random effect to groups formed by goats descended from the same father, a significant association was observed between the times of goats belonging to such groups, with only 2 bulls showing more fragile daughters and consequently less permanence in the herd. The use of frailty models is relevant to meet the objectives of animal husbandry, as a technique to identify frailties due to the effects of factors that are difficult or costly to measure in bulls classified as having high genetic value. The simplicity and presentation of results in the form of graphs that are easy to understand make the method attractive for this type of research.
650 $aLongevity
653 $aShared frailty
653 $aSurvival
653 $aWorms
700 1 $aTOMAZELLA, V. L. D.
700 1 $aCAMPELO, J. E. G.
700 1 $aA. FILHO, J. L.
700 1 $aBARIONI JUNIOR, W.
700 1 $aSOUSA JUNIOR, S. C.
773 $tSmall Ruminant Research$gv.199, jun. 2021, 106368.
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