Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.

Detalhes bibliográficos
Autor(a) principal: LIMA, C. M. M.
Data de Publicação: 2021
Outros Autores: TOMAZELLA, V. L. D., SOUSA JUNIOR, S. C. DE, CAMPELO, J. E. G., SENA, L. S., BARIONI JUNIOR, W.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1138135
Resumo: Anglo-Nubian goats are hardy animals able to adapt to tropical environments, where their farming is usually held on pasture. However, climatic conditions in this environment also favor endoparasitism, which implies a negative aspect if sensitivity to worm infections interferes by reducing the reproductive lifespan of females, as their stay in the herd is a trait of great importance for efficient goat farming. In this respect, this study proposes to use the survival analysis methodology with the Cox-Gompertz proportional hazards model to assess the length of stay in the herd by relating the removal of females due to death with worm infection being the main cause to other forms of culling, using information from 101 Anglo-Nubian goats born from 2009 to 2013 in an experimental herd from Teresina - PI, Brazil. The Cox-Gompertz proportional hazards model chose body condition score, birth weight and birth season as important covariates (p-value ≤ 10%). Body condition score showed to be a favorable factor for the longer stay of the goats in the herd. Eggs per gram, age at first kidding, birth type and dam age were not significant. The Cox-Gompertz proportional hazards model is suitable for fitting the statistical model to estimate the length of stay in the herd, with censoring related to endoparasitism in Anglo-Nubian goats
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spelling Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.Body condition scoreCensoringCullingEPGFamachaAnglo-Nubian goats are hardy animals able to adapt to tropical environments, where their farming is usually held on pasture. However, climatic conditions in this environment also favor endoparasitism, which implies a negative aspect if sensitivity to worm infections interferes by reducing the reproductive lifespan of females, as their stay in the herd is a trait of great importance for efficient goat farming. In this respect, this study proposes to use the survival analysis methodology with the Cox-Gompertz proportional hazards model to assess the length of stay in the herd by relating the removal of females due to death with worm infection being the main cause to other forms of culling, using information from 101 Anglo-Nubian goats born from 2009 to 2013 in an experimental herd from Teresina - PI, Brazil. The Cox-Gompertz proportional hazards model chose body condition score, birth weight and birth season as important covariates (p-value ≤ 10%). Body condition score showed to be a favorable factor for the longer stay of the goats in the herd. Eggs per gram, age at first kidding, birth type and dam age were not significant. The Cox-Gompertz proportional hazards model is suitable for fitting the statistical model to estimate the length of stay in the herd, with censoring related to endoparasitism in Anglo-Nubian goatsCLEIDE MAYRA MENEZES LIMA, UFPI; VERA LUCIA DAMASCENO TOMAZELLA, UFSCAR; SEVERINO CAVALCANTE DE SOUSA JUNIOR, UFDPA; JOSÉ ELIVALTO GUIMARÃES CAMPELO, UFPI; LUCIANO SILVA SENA, UFPI; WALDOMIRO BARIONI JUNIOR, CPPSE.LIMA, C. M. M.TOMAZELLA, V. L. D.SOUSA JUNIOR, S. C. DECAMPELO, J. E. G.SENA, L. S.BARIONI JUNIOR, W.2021-12-21T13:01:09Z2021-12-21T13:01:09Z2021-12-212021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleSemina. Ciências Agrárias, v.42, n.5, p.2937-2958, 2021.http://www.alice.cnptia.embrapa.br/alice/handle/doc/113813510.5433/1679-0359.2021v42n5p2937enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2021-12-21T13:01:19Zoai:www.alice.cnptia.embrapa.br:doc/1138135Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542021-12-21T13:01:19falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542021-12-21T13:01:19Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.
title Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.
spellingShingle Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.
LIMA, C. M. M.
Body condition score
Censoring
Culling
EPG
Famacha
title_short Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.
title_full Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.
title_fullStr Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.
title_full_unstemmed Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.
title_sort Cox-Gompertz model for analysis of the time of stay in an anglo-nubian goat herd.
author LIMA, C. M. M.
author_facet LIMA, C. M. M.
TOMAZELLA, V. L. D.
SOUSA JUNIOR, S. C. DE
CAMPELO, J. E. G.
SENA, L. S.
BARIONI JUNIOR, W.
author_role author
author2 TOMAZELLA, V. L. D.
SOUSA JUNIOR, S. C. DE
CAMPELO, J. E. G.
SENA, L. S.
BARIONI JUNIOR, W.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv CLEIDE MAYRA MENEZES LIMA, UFPI; VERA LUCIA DAMASCENO TOMAZELLA, UFSCAR; SEVERINO CAVALCANTE DE SOUSA JUNIOR, UFDPA; JOSÉ ELIVALTO GUIMARÃES CAMPELO, UFPI; LUCIANO SILVA SENA, UFPI; WALDOMIRO BARIONI JUNIOR, CPPSE.
dc.contributor.author.fl_str_mv LIMA, C. M. M.
TOMAZELLA, V. L. D.
SOUSA JUNIOR, S. C. DE
CAMPELO, J. E. G.
SENA, L. S.
BARIONI JUNIOR, W.
dc.subject.por.fl_str_mv Body condition score
Censoring
Culling
EPG
Famacha
topic Body condition score
Censoring
Culling
EPG
Famacha
description Anglo-Nubian goats are hardy animals able to adapt to tropical environments, where their farming is usually held on pasture. However, climatic conditions in this environment also favor endoparasitism, which implies a negative aspect if sensitivity to worm infections interferes by reducing the reproductive lifespan of females, as their stay in the herd is a trait of great importance for efficient goat farming. In this respect, this study proposes to use the survival analysis methodology with the Cox-Gompertz proportional hazards model to assess the length of stay in the herd by relating the removal of females due to death with worm infection being the main cause to other forms of culling, using information from 101 Anglo-Nubian goats born from 2009 to 2013 in an experimental herd from Teresina - PI, Brazil. The Cox-Gompertz proportional hazards model chose body condition score, birth weight and birth season as important covariates (p-value ≤ 10%). Body condition score showed to be a favorable factor for the longer stay of the goats in the herd. Eggs per gram, age at first kidding, birth type and dam age were not significant. The Cox-Gompertz proportional hazards model is suitable for fitting the statistical model to estimate the length of stay in the herd, with censoring related to endoparasitism in Anglo-Nubian goats
publishDate 2021
dc.date.none.fl_str_mv 2021-12-21T13:01:09Z
2021-12-21T13:01:09Z
2021-12-21
2021
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Semina. Ciências Agrárias, v.42, n.5, p.2937-2958, 2021.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1138135
10.5433/1679-0359.2021v42n5p2937
identifier_str_mv Semina. Ciências Agrárias, v.42, n.5, p.2937-2958, 2021.
10.5433/1679-0359.2021v42n5p2937
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/1138135
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
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