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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
14/01/2019 |
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Data da última atualização: |
24/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AZEVEDO JUNIOR, J.; GONÇALVES, T. de M.; SOUZA, J. C. de; RODRIGUEZ, M. A. P.; COSTA, C. N.; CARVALHEIRA, J. G. V. |
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Afiliação: |
Jairo Azevedo Junior, UFLA; Tarcisio de Moraes Gonçalves, UFLA; José Camisão de Souza, UFLA; Mary Ana Petersen Rodriguez, Universidade Estadual de Montes Claros; CLAUDIO NAPOLIS COSTA, CNPGL; Julio Gil Vale Carvalheira, Universidade do Porto, Portugal. |
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Título: |
Adjustment of lactation curves of Holstein cows from herds of Minas Gerais, Brazil. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Journal of Agricultural Science, v. 10, n. 2, 2018. |
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Páginas: |
14 p. |
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DOI: |
10.5539/jas.v10n2p1 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract Random regression models (RRM) differ in terms of the functions used to describe the shape of lactation curves. The aim was to compare random regression models under different functions to describe the lactation curves from Holstein cows in herds of the state of Minas Gerais. A database of 28,118 production records was analyzed using the test-day records of 4,230 first parity cows from five herds. The Wilmink, Ali & Schaeffer and Legendre polynomial (orders 4, 5 and 6) functions were adjusted in RRM to model the mean production trend (fixed) and genetic and permanent environmental (random) effects. The residual variances were assumed to be constant throughout lactation. Analyses were performed using the AIREMLF90 program. Except for the model with the polynomial function of order 5, all models converged. The Wilmink function showed lower values for criteria based on the -2log (L), AIC and BIC. The model with the Legendre polynomial of order 6 showed lower residual variance. Heritability estimates were similar between functions, ranging from 0.07 to 0.18 and were higher from 215 days of lactation. From 155 days of lactation, genetic and permanent environmental correlations between successive controls are of high magnitude. The Wilmink function is the most suitable for the study of milk yields from primiparous Holstein cows. The selection of animals is possible from 155 days of lactation on. Permanent environmental effects have greater influence on the milk production at the end of lactation of primiparous cows and should be considered since they are important and may be cumulative throughout lactation. MenosAbstract Random regression models (RRM) differ in terms of the functions used to describe the shape of lactation curves. The aim was to compare random regression models under different functions to describe the lactation curves from Holstein cows in herds of the state of Minas Gerais. A database of 28,118 production records was analyzed using the test-day records of 4,230 first parity cows from five herds. The Wilmink, Ali & Schaeffer and Legendre polynomial (orders 4, 5 and 6) functions were adjusted in RRM to model the mean production trend (fixed) and genetic and permanent environmental (random) effects. The residual variances were assumed to be constant throughout lactation. Analyses were performed using the AIREMLF90 program. Except for the model with the polynomial function of order 5, all models converged. The Wilmink function showed lower values for criteria based on the -2log (L), AIC and BIC. The model with the Legendre polynomial of order 6 showed lower residual variance. Heritability estimates were similar between functions, ranging from 0.07 to 0.18 and were higher from 215 days of lactation. From 155 days of lactation, genetic and permanent environmental correlations between successive controls are of high magnitude. The Wilmink function is the most suitable for the study of milk yields from primiparous Holstein cows. The selection of animals is possible from 155 days of lactation on. Permanent environmental effects have greater influence on the milk production... Mostrar Tudo |
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Palavras-Chave: |
Models comparison; Permanent environmental effects; Random regression model. |
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Thesaurus Nal: |
Dairy cattle; Heritability. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/190401/1/Artigo-JAgrSci-Claudio-Adjustment.pdf
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Marc: |
LEADER 02438naa a2200265 a 4500
001 2103873
005 2023-01-24
008 2018 bl uuuu u00u1 u #d
024 7 $a10.5539/jas.v10n2p1$2DOI
100 1 $aAZEVEDO JUNIOR, J.
245 $aAdjustment of lactation curves of Holstein cows from herds of Minas Gerais, Brazil.$h[electronic resource]
260 $c2018
300 $a14 p.
520 $aAbstract Random regression models (RRM) differ in terms of the functions used to describe the shape of lactation curves. The aim was to compare random regression models under different functions to describe the lactation curves from Holstein cows in herds of the state of Minas Gerais. A database of 28,118 production records was analyzed using the test-day records of 4,230 first parity cows from five herds. The Wilmink, Ali & Schaeffer and Legendre polynomial (orders 4, 5 and 6) functions were adjusted in RRM to model the mean production trend (fixed) and genetic and permanent environmental (random) effects. The residual variances were assumed to be constant throughout lactation. Analyses were performed using the AIREMLF90 program. Except for the model with the polynomial function of order 5, all models converged. The Wilmink function showed lower values for criteria based on the -2log (L), AIC and BIC. The model with the Legendre polynomial of order 6 showed lower residual variance. Heritability estimates were similar between functions, ranging from 0.07 to 0.18 and were higher from 215 days of lactation. From 155 days of lactation, genetic and permanent environmental correlations between successive controls are of high magnitude. The Wilmink function is the most suitable for the study of milk yields from primiparous Holstein cows. The selection of animals is possible from 155 days of lactation on. Permanent environmental effects have greater influence on the milk production at the end of lactation of primiparous cows and should be considered since they are important and may be cumulative throughout lactation.
650 $aDairy cattle
650 $aHeritability
653 $aModels comparison
653 $aPermanent environmental effects
653 $aRandom regression model
700 1 $aGONÇALVES, T. de M.
700 1 $aSOUZA, J. C. de
700 1 $aRODRIGUEZ, M. A. P.
700 1 $aCOSTA, C. N.
700 1 $aCARVALHEIRA, J. G. V.
773 $tJournal of Agricultural Science$gv. 10, n. 2, 2018.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
17/05/2018 |
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Data da última atualização: |
17/05/2018 |
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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: |
ARAUJO, G. P. de; PARENTE, J.; WANSINK, B. |
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Afiliação: |
GUSTAVO PORPINO DE ARAUJO, Secom; JURACI PARENTE, Getulio Vargas Foundation (FGV-EAESP), São Paulo, SP.; BRIAN WANSINK, Charles H. Dyson School of Applied Economics and Management, Cornell University, Ithaca, New York, USA. |
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Título: |
Food waste paradox: antecedents of food disposal in low income households. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
International Journal of Consumer Studies, v. 39, p. 619?629, 2015. |
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DOI: |
10.1111/ijcs.12207 |
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Idioma: |
Inglês |
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Conteúdo: |
This article aims to identify antecedents of food waste among lower-middle class families ? a paradox, given the financial constraints this population faces. The importance of this research is evident in escalating environmental pressures for better use of our planet?s scarce resources. Given that most of the world is low-income, any behavioral change in this population is likely to have a considerable impact. Empirical data were collected from 14 lower-middle income Brazilian households, based on observations, in-depth interviews, photographs and a focus group (n56). Five major categories of food waste antecedents were identified: (1) excessive purchasing, (2) overpreparation, (3) caring for a pet, (4) avoidance of leftovers and (5) inappropriate food conservation. Several subcategories were also found, including impulse buying, lack of planning and preference for large packages. Surprisingly, findings show that strategies used to save money ? such as buying groceries in bulk, monthly shopping trips, preference for supermarkets and cooking from scratch ? actually end up generating more food waste. This mitigates the savings made during the purchasing phase. |
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Thesaurus NAL: |
Food consumption; Food waste; Low income households. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/177095/1/Food-waste-paradox.pdf
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Marc: |
LEADER 01761naa a2200193 a 4500
001 2091604
005 2018-05-17
008 2015 bl uuuu u00u1 u #d
024 7 $a10.1111/ijcs.12207$2DOI
100 1 $aARAUJO, G. P. de
245 $aFood waste paradox$bantecedents of food disposal in low income households.$h[electronic resource]
260 $c2015
520 $aThis article aims to identify antecedents of food waste among lower-middle class families ? a paradox, given the financial constraints this population faces. The importance of this research is evident in escalating environmental pressures for better use of our planet?s scarce resources. Given that most of the world is low-income, any behavioral change in this population is likely to have a considerable impact. Empirical data were collected from 14 lower-middle income Brazilian households, based on observations, in-depth interviews, photographs and a focus group (n56). Five major categories of food waste antecedents were identified: (1) excessive purchasing, (2) overpreparation, (3) caring for a pet, (4) avoidance of leftovers and (5) inappropriate food conservation. Several subcategories were also found, including impulse buying, lack of planning and preference for large packages. Surprisingly, findings show that strategies used to save money ? such as buying groceries in bulk, monthly shopping trips, preference for supermarkets and cooking from scratch ? actually end up generating more food waste. This mitigates the savings made during the purchasing phase.
650 $aFood consumption
650 $aFood waste
650 $aLow income households
700 1 $aPARENTE, J.
700 1 $aWANSINK, B.
773 $tInternational Journal of Consumer Studies$gv. 39, p. 619?629, 2015.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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| Registros recuperados : 82 | |
| 1. |  | 0901264, ANAIS DA ESCOLA DE MINAS DE OURO PRETO, Escola de Minas e Metalurgia de Ouro Preto, Ouro Preto, MG
Biblioteca(s): Catálogo Coletivo de Periódicos Embrapa; Embrapa Semiárido; Embrapa Solos. |   |
| 2. | | 0900505, LAVOURA PARAENSE, Secretaria de Obras Publicas, Terra e Viacao, Belem-PA
Biblioteca(s): Catálogo Coletivo de Periódicos Embrapa; Embrapa Amazônia Oriental. | |
| 4. | | 2600132, INDIAN FOREST RECORDS, Forest Research Institute and Colleges, New Delhi, IN
Biblioteca(s): Catálogo Coletivo de Periódicos Embrapa; Embrapa Florestas. | |
| 7. | | 0900344, BOLETIM AGRICOLA DE PERNAMBUCO, Uniao dos Sindicatos Agricolas de Pernambuco, Recife-PE
Biblioteca(s): Catálogo Coletivo de Periódicos Embrapa; Embrapa Semiárido. | |
| 10. | | 1850049, HOJAS DIVULGADORAS, Ministerio de Agricultura Pesca y Alimentacion, Madrid-Espanha
Biblioteca(s): Catálogo Coletivo de Periódicos Embrapa; Embrapa Agropecuária Oeste. | |
| 11. | | 2850004, AGRICOLTURA COLONIALE, Istituto Agricola Coloniale Italiano. Instituto Agronomico per l'Oltremares, Firenze, Italia, IT
Biblioteca(s): Catálogo Coletivo de Periódicos Embrapa; Embrapa Amazônia Oriental. | |
| 14. | | 0350176, JAHRBUCH DER CHEMIE, Herausgegeben, Frankfurt-Alemanha Ocidental
Biblioteca(s): Catálogo Coletivo de Periódicos Embrapa; Embrapa Amazônia Oriental. | |
| Registros recuperados : 82 | |
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