Selection objectives and criteria for sheep in Central Brazil
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98422 |
Resumo: | Three production systems for sheep (Low - L, Medium - M and High - H technology), with increasing technological levels, were studied under conditions in the Center-west of Brazil, to determine economic weights and selection indices of important traits. Receipts and costs were simulated using an economic simulator to calculate the structure of the operational costs. Only characteristics that were responsible for more than 10% of the profit were studied, which included: number of weaned lambs, food consumption (ewe and lamb), weight of carcass and weight of female lambs sold for reproduction. Regardless of the index used (profitability or yield) or system (L, M or H), the economic weights are larger for the number of lambs weaned per ewe. With improvement in the technology used within the production system (H to L) the importance of this trait becomes less important. Lamb growth increased and weight of female for slaughter decreased in importance in higher technology systems. Changes in herd structure had little influence on economic values, whereas (co)variances were important sources of change in selection indices. |
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Pimentel, Concepta Margaret McManusPinto, Bruno FreitasMartins, Rafhael Felipe SaraivaLouvandini, HelderPaiva, Samuel RezendeBraccini Neto, JoséPaim, Tiago do Prado2014-07-23T02:05:54Z20111516-3598http://hdl.handle.net/10183/98422000865965Three production systems for sheep (Low - L, Medium - M and High - H technology), with increasing technological levels, were studied under conditions in the Center-west of Brazil, to determine economic weights and selection indices of important traits. Receipts and costs were simulated using an economic simulator to calculate the structure of the operational costs. Only characteristics that were responsible for more than 10% of the profit were studied, which included: number of weaned lambs, food consumption (ewe and lamb), weight of carcass and weight of female lambs sold for reproduction. Regardless of the index used (profitability or yield) or system (L, M or H), the economic weights are larger for the number of lambs weaned per ewe. With improvement in the technology used within the production system (H to L) the importance of this trait becomes less important. Lamb growth increased and weight of female for slaughter decreased in importance in higher technology systems. Changes in herd structure had little influence on economic values, whereas (co)variances were important sources of change in selection indices.application/pdfengRevista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 40, n. 12 (dez. 2011), p. 2713-2720Produção animalCorrelationsCostsHeritabilityProfitRevenueSelection objectives and criteria for sheep in Central Brazilinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000865965.pdf000865965.pdfTexto completo (inglês)application/pdf50384http://www.lume.ufrgs.br/bitstream/10183/98422/1/000865965.pdfe1716571c429767fabbe5f690d0ed5afMD51TEXT000865965.pdf.txt000865965.pdf.txtExtracted Texttext/plain36188http://www.lume.ufrgs.br/bitstream/10183/98422/2/000865965.pdf.txtfbf580defe983fee2b52c5ba9eaf72daMD52THUMBNAIL000865965.pdf.jpg000865965.pdf.jpgGenerated Thumbnailimage/jpeg1932http://www.lume.ufrgs.br/bitstream/10183/98422/3/000865965.pdf.jpg3645d498e7b081338e1243e6be604e59MD5310183/984222021-07-09 04:31:12.014179oai:www.lume.ufrgs.br:10183/98422Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-07-09T07:31:12Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Selection objectives and criteria for sheep in Central Brazil |
title |
Selection objectives and criteria for sheep in Central Brazil |
spellingShingle |
Selection objectives and criteria for sheep in Central Brazil Pimentel, Concepta Margaret McManus Produção animal Correlations Costs Heritability Profit Revenue |
title_short |
Selection objectives and criteria for sheep in Central Brazil |
title_full |
Selection objectives and criteria for sheep in Central Brazil |
title_fullStr |
Selection objectives and criteria for sheep in Central Brazil |
title_full_unstemmed |
Selection objectives and criteria for sheep in Central Brazil |
title_sort |
Selection objectives and criteria for sheep in Central Brazil |
author |
Pimentel, Concepta Margaret McManus |
author_facet |
Pimentel, Concepta Margaret McManus Pinto, Bruno Freitas Martins, Rafhael Felipe Saraiva Louvandini, Helder Paiva, Samuel Rezende Braccini Neto, José Paim, Tiago do Prado |
author_role |
author |
author2 |
Pinto, Bruno Freitas Martins, Rafhael Felipe Saraiva Louvandini, Helder Paiva, Samuel Rezende Braccini Neto, José Paim, Tiago do Prado |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Pimentel, Concepta Margaret McManus Pinto, Bruno Freitas Martins, Rafhael Felipe Saraiva Louvandini, Helder Paiva, Samuel Rezende Braccini Neto, José Paim, Tiago do Prado |
dc.subject.por.fl_str_mv |
Produção animal |
topic |
Produção animal Correlations Costs Heritability Profit Revenue |
dc.subject.eng.fl_str_mv |
Correlations Costs Heritability Profit Revenue |
description |
Three production systems for sheep (Low - L, Medium - M and High - H technology), with increasing technological levels, were studied under conditions in the Center-west of Brazil, to determine economic weights and selection indices of important traits. Receipts and costs were simulated using an economic simulator to calculate the structure of the operational costs. Only characteristics that were responsible for more than 10% of the profit were studied, which included: number of weaned lambs, food consumption (ewe and lamb), weight of carcass and weight of female lambs sold for reproduction. Regardless of the index used (profitability or yield) or system (L, M or H), the economic weights are larger for the number of lambs weaned per ewe. With improvement in the technology used within the production system (H to L) the importance of this trait becomes less important. Lamb growth increased and weight of female for slaughter decreased in importance in higher technology systems. Changes in herd structure had little influence on economic values, whereas (co)variances were important sources of change in selection indices. |
publishDate |
2011 |
dc.date.issued.fl_str_mv |
2011 |
dc.date.accessioned.fl_str_mv |
2014-07-23T02:05:54Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
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http://hdl.handle.net/10183/98422 |
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1516-3598 |
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000865965 |
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eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Revista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 40, n. 12 (dez. 2011), p. 2713-2720 |
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openAccess |
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