Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , , , |
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/596411 https://doi.org/10.1016/j.livsci.2007.08.006 |
Resumo: | This experiment was designed to examine changes in milk fatty acids during fish oil-induced milk fat depression (MFD) and to test the theory that these changes are related to milk fat fluidity. The experiment was divided into three periods: 1) Baseline: all cows (n = 12) received a high fiber diet without fish oil (FO) for 12 days; 2) Treatment: 4 cows/group received the following treatments for 21 days: a) Low fiber diet without FO (LF), b) High fiber diet + FO (HF + FO) and c) Low fiber diet + FO (LF + FO); 3) Post-treatment: cows returned to the baseline diet and were monitored for 12 days. FO was included at 1.6% DM and HF and LF diets had 40 and 26% NDF, respectively. Milk fat content and yield were unchanged by the LF diet, but were reduced by FO diets at both dietary fiber levels and recovered in the post-treatment period. FO diets caused a pronounced reduction in stearic and oleic acid concentrations in milk fat and an equally pronounced increase in trans-18:1 fatty acid concentrations. Milk fat mean melting point (MMP) was correlated with MFD (r = 0.73) and with milk oleic acid concentration (r = − 0.92). The ratio of oleic:stearic in milk fat increased gradually and consistently in response to FO. Trans-C18:1 isomers with double bounds at carbon ≤ 10 increased with greater MFD and those with double bonds at carbon ≥ 11 decreased with greater MFD. Trans-9 cis-11 CLA explained more than 80% of MFD and was strongly correlated with trans-10 C18:1. Maintenance of MMP below 39–40 °C suggests that the mammary gland was able to secrete only milk fat with adequate fluidity and that MFD could be an adaptation mechanism to prevent secretion of milk with higher MMP. |
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Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat.Fish oilMilk fat depressionTrans-fatty acidsConjugated linoleic acidsMilk fat fluidityThis experiment was designed to examine changes in milk fatty acids during fish oil-induced milk fat depression (MFD) and to test the theory that these changes are related to milk fat fluidity. The experiment was divided into three periods: 1) Baseline: all cows (n = 12) received a high fiber diet without fish oil (FO) for 12 days; 2) Treatment: 4 cows/group received the following treatments for 21 days: a) Low fiber diet without FO (LF), b) High fiber diet + FO (HF + FO) and c) Low fiber diet + FO (LF + FO); 3) Post-treatment: cows returned to the baseline diet and were monitored for 12 days. FO was included at 1.6% DM and HF and LF diets had 40 and 26% NDF, respectively. Milk fat content and yield were unchanged by the LF diet, but were reduced by FO diets at both dietary fiber levels and recovered in the post-treatment period. FO diets caused a pronounced reduction in stearic and oleic acid concentrations in milk fat and an equally pronounced increase in trans-18:1 fatty acid concentrations. Milk fat mean melting point (MMP) was correlated with MFD (r = 0.73) and with milk oleic acid concentration (r = − 0.92). The ratio of oleic:stearic in milk fat increased gradually and consistently in response to FO. Trans-C18:1 isomers with double bounds at carbon ≤ 10 increased with greater MFD and those with double bonds at carbon ≥ 11 decreased with greater MFD. Trans-9 cis-11 CLA explained more than 80% of MFD and was strongly correlated with trans-10 C18:1. Maintenance of MMP below 39–40 °C suggests that the mammary gland was able to secrete only milk fat with adequate fluidity and that MFD could be an adaptation mechanism to prevent secretion of milk with higher MMP.Marco Antonio Sundfeld da Gama, Embrapa Gado de Leite; P. C. Garnsworthy University of Nottingham School of Biosciences Loughborough UK; J. M. Griinari University of Helsinki Finland; P. R. Leme, USP; P. H. M. Rodrigues, USP; L. W. O. Souza, USP; Dante Pazzanese Duarte Lanna, ESALQ/USP.GAMA, M. A. S.GARNSWORTHY, P. C.GRIINARI, J. M.LEME, P. R.RODRIGUES, P. H. M.SOUZA, L. W. O.LANNA, D. P. D.2024-02-08T16:32:23Z2024-02-08T16:32:23Z2009-03-232008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleLivestock Science, v. 115, n. 2/3, p. 319-331, 2008.http://www.alice.cnptia.embrapa.br/alice/handle/doc/596411https://doi.org/10.1016/j.livsci.2007.08.006enginfo: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:EMBRAPA2024-02-08T16:32:23Zoai:www.alice.cnptia.embrapa.br:doc/596411Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542024-02-08T16:32:23falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542024-02-08T16:32:23Repositório 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 |
Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat. |
title |
Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat. |
spellingShingle |
Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat. GAMA, M. A. S. Fish oil Milk fat depression Trans-fatty acids Conjugated linoleic acids Milk fat fluidity |
title_short |
Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat. |
title_full |
Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat. |
title_fullStr |
Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat. |
title_full_unstemmed |
Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat. |
title_sort |
Diet - inducet milk fat depression: Assoication with changes in milk fatty acid composition and fluidity of milk fat. |
author |
GAMA, M. A. S. |
author_facet |
GAMA, M. A. S. GARNSWORTHY, P. C. GRIINARI, J. M. LEME, P. R. RODRIGUES, P. H. M. SOUZA, L. W. O. LANNA, D. P. D. |
author_role |
author |
author2 |
GARNSWORTHY, P. C. GRIINARI, J. M. LEME, P. R. RODRIGUES, P. H. M. SOUZA, L. W. O. LANNA, D. P. D. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Marco Antonio Sundfeld da Gama, Embrapa Gado de Leite; P. C. Garnsworthy University of Nottingham School of Biosciences Loughborough UK; J. M. Griinari University of Helsinki Finland; P. R. Leme, USP; P. H. M. Rodrigues, USP; L. W. O. Souza, USP; Dante Pazzanese Duarte Lanna, ESALQ/USP. |
dc.contributor.author.fl_str_mv |
GAMA, M. A. S. GARNSWORTHY, P. C. GRIINARI, J. M. LEME, P. R. RODRIGUES, P. H. M. SOUZA, L. W. O. LANNA, D. P. D. |
dc.subject.por.fl_str_mv |
Fish oil Milk fat depression Trans-fatty acids Conjugated linoleic acids Milk fat fluidity |
topic |
Fish oil Milk fat depression Trans-fatty acids Conjugated linoleic acids Milk fat fluidity |
description |
This experiment was designed to examine changes in milk fatty acids during fish oil-induced milk fat depression (MFD) and to test the theory that these changes are related to milk fat fluidity. The experiment was divided into three periods: 1) Baseline: all cows (n = 12) received a high fiber diet without fish oil (FO) for 12 days; 2) Treatment: 4 cows/group received the following treatments for 21 days: a) Low fiber diet without FO (LF), b) High fiber diet + FO (HF + FO) and c) Low fiber diet + FO (LF + FO); 3) Post-treatment: cows returned to the baseline diet and were monitored for 12 days. FO was included at 1.6% DM and HF and LF diets had 40 and 26% NDF, respectively. Milk fat content and yield were unchanged by the LF diet, but were reduced by FO diets at both dietary fiber levels and recovered in the post-treatment period. FO diets caused a pronounced reduction in stearic and oleic acid concentrations in milk fat and an equally pronounced increase in trans-18:1 fatty acid concentrations. Milk fat mean melting point (MMP) was correlated with MFD (r = 0.73) and with milk oleic acid concentration (r = − 0.92). The ratio of oleic:stearic in milk fat increased gradually and consistently in response to FO. Trans-C18:1 isomers with double bounds at carbon ≤ 10 increased with greater MFD and those with double bonds at carbon ≥ 11 decreased with greater MFD. Trans-9 cis-11 CLA explained more than 80% of MFD and was strongly correlated with trans-10 C18:1. Maintenance of MMP below 39–40 °C suggests that the mammary gland was able to secrete only milk fat with adequate fluidity and that MFD could be an adaptation mechanism to prevent secretion of milk with higher MMP. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008 2009-03-23 2024-02-08T16:32:23Z 2024-02-08T16:32:23Z |
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 |
Livestock Science, v. 115, n. 2/3, p. 319-331, 2008. http://www.alice.cnptia.embrapa.br/alice/handle/doc/596411 https://doi.org/10.1016/j.livsci.2007.08.006 |
identifier_str_mv |
Livestock Science, v. 115, n. 2/3, p. 319-331, 2008. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/596411 https://doi.org/10.1016/j.livsci.2007.08.006 |
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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1794503558018629632 |