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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
12/12/2012 |
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Data da última atualização: |
09/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, D. E.; GAMA, M. A. S. da; FERNANDES, D.; TEDESCHI, L. O.; BAUMAN, D. E. |
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Afiliação: |
D. E. OLIVEIRA, UESC; MARCO ANTONIO SUNDFELD DA GAMA, CNPGL; D. FERNANDES, UESC; L. O. TEDESCHI, UNIVERSIDADE DO TEXAS; D. E. BAUMAN, CORNELL. |
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Título: |
An protected conjugeted linoleic acid supplement decrease milk production and secretion of milk components in grazing dairy ewes. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Journal of Dairy Science, v. 95, n. 3, p. 1437-1446, 2012 |
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DOI: |
https://doi.org/10.3168/jds.2011-4618 |
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Idioma: |
Inglês |
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Conteúdo: |
Feeding conjugated linoleic acid (CLA) in a rumen-inert form to dairy ewes has been shown to increase milk production, alter milk composition, and increase the milk fat CLA content. However, few studies have tested ruminally unprotected CLA sources. The objective of this study was to evaluate the effects of an unprotected CLA supplement (29.8% of cis-9,trans-11 and 29.9% of trans-10,cis-12 isomers as methyl esters) on milk yield and composition of dairy ewes. Twenty-four lactating Lacaune ewes were used in a crossover design and received 2 dietary treatments: (1) control: basal diet containing no supplemental lipid and (2) basal diet plus CLA (30 g/d). The CLA supplement was mixed into the concentrate and fed in 2 equal meals after morning and afternoon milkings. Each experimental period consisted of 21 d: 7 d for adaptation and 14 d for data collection. The CLA supplement decreased milk fat content and yield by 31.3 and 38.0%, respectively. Milk yield and secretion of milk lactose and protein were decreased by 8.0, 9.8, and 5.6%, respectively. On the other hand, milk protein content and linear SCC score were 1.8 and 17.7% higher in ewes fed the CLA supplement. The concentration of milk fatty acids originating from de novo synthesis (C16) was increased by 22.6% in ewes fed the CLA supplement. The CLA supplement decreased C14:1/C14:0, C16:1/C16:0, and C18:1/C18:0 desaturase indexes by 25, 18.7, and 0.1%, respectively, but increased the cis-9,trans-11 CLA/trans-11 C18:1 ratio by 8.6%. The concentrations of trans-10,cis-12 CLA and cis-9,trans-11 CLA in milk fat was 309 and 33.4% higher in ewes fed CLA. Pronounced milk fat depression coupled with the deleterious effects on milk yield, milk SCC, and secretion of all milk solids observed in ewes fed an unprotected CLA supplement is likely to be associated with high doses of trans-10,cis-12 CLA reaching the mammary gland, corroborating previous results obtained with dairy cows. MenosFeeding conjugated linoleic acid (CLA) in a rumen-inert form to dairy ewes has been shown to increase milk production, alter milk composition, and increase the milk fat CLA content. However, few studies have tested ruminally unprotected CLA sources. The objective of this study was to evaluate the effects of an unprotected CLA supplement (29.8% of cis-9,trans-11 and 29.9% of trans-10,cis-12 isomers as methyl esters) on milk yield and composition of dairy ewes. Twenty-four lactating Lacaune ewes were used in a crossover design and received 2 dietary treatments: (1) control: basal diet containing no supplemental lipid and (2) basal diet plus CLA (30 g/d). The CLA supplement was mixed into the concentrate and fed in 2 equal meals after morning and afternoon milkings. Each experimental period consisted of 21 d: 7 d for adaptation and 14 d for data collection. The CLA supplement decreased milk fat content and yield by 31.3 and 38.0%, respectively. Milk yield and secretion of milk lactose and protein were decreased by 8.0, 9.8, and 5.6%, respectively. On the other hand, milk protein content and linear SCC score were 1.8 and 17.7% higher in ewes fed the CLA supplement. The concentration of milk fatty acids originating from de novo synthesis (C16) was increased by 22.6% in ewes fed the CLA supplement. The CLA supplement decreased C14:1/C14:0, C16:1/C16:0, and C18:1/C18:0 des... Mostrar Tudo |
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Palavras-Chave: |
Depressão de gordura do leite; Ovelha lacaune; Produção de leite. |
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Thesagro: |
Glândula Mamaria. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02837naa a2200229 a 4500
001 1942248
005 2024-02-09
008 2012 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3168/jds.2011-4618$2DOI
100 1 $aOLIVEIRA, D. E.
245 $aAn protected conjugeted linoleic acid supplement decrease milk production and secretion of milk components in grazing dairy ewes.$h[electronic resource]
260 $c2012
520 $aFeeding conjugated linoleic acid (CLA) in a rumen-inert form to dairy ewes has been shown to increase milk production, alter milk composition, and increase the milk fat CLA content. However, few studies have tested ruminally unprotected CLA sources. The objective of this study was to evaluate the effects of an unprotected CLA supplement (29.8% of cis-9,trans-11 and 29.9% of trans-10,cis-12 isomers as methyl esters) on milk yield and composition of dairy ewes. Twenty-four lactating Lacaune ewes were used in a crossover design and received 2 dietary treatments: (1) control: basal diet containing no supplemental lipid and (2) basal diet plus CLA (30 g/d). The CLA supplement was mixed into the concentrate and fed in 2 equal meals after morning and afternoon milkings. Each experimental period consisted of 21 d: 7 d for adaptation and 14 d for data collection. The CLA supplement decreased milk fat content and yield by 31.3 and 38.0%, respectively. Milk yield and secretion of milk lactose and protein were decreased by 8.0, 9.8, and 5.6%, respectively. On the other hand, milk protein content and linear SCC score were 1.8 and 17.7% higher in ewes fed the CLA supplement. The concentration of milk fatty acids originating from de novo synthesis (<C16) was decreased by 25%, whereas the concentration of milk fatty acids taken up preformed from the plasma (>C16) was increased by 22.6% in ewes fed the CLA supplement. The CLA supplement decreased C14:1/C14:0, C16:1/C16:0, and C18:1/C18:0 desaturase indexes by 25, 18.7, and 0.1%, respectively, but increased the cis-9,trans-11 CLA/trans-11 C18:1 ratio by 8.6%. The concentrations of trans-10,cis-12 CLA and cis-9,trans-11 CLA in milk fat was 309 and 33.4% higher in ewes fed CLA. Pronounced milk fat depression coupled with the deleterious effects on milk yield, milk SCC, and secretion of all milk solids observed in ewes fed an unprotected CLA supplement is likely to be associated with high doses of trans-10,cis-12 CLA reaching the mammary gland, corroborating previous results obtained with dairy cows.
650 $aGlândula Mamaria
653 $aDepressão de gordura do leite
653 $aOvelha lacaune
653 $aProdução de leite
700 1 $aGAMA, M. A. S. da
700 1 $aFERNANDES, D.
700 1 $aTEDESCHI, L. O.
700 1 $aBAUMAN, D. E.
773 $tJournal of Dairy Science$gv. 95, n. 3, p. 1437-1446, 2012
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
18/10/2012 |
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Data da última atualização: |
18/10/2012 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
TIZIOTO, P. C.; NICIURA, S. C. M.; IBELLI, A. M. G.; VENERONI, G. B.; SIQUEIRA, F.; SILVA, L. O. C. da; TORRES JUNIOR, R. A. de A.; ALENCAR, M. M. de; REGITANO, L. C. de A.; ROSA, A. do N. |
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Afiliação: |
PÓS-GRADUAÇÃO UFSCar/SÃO CARLOS, SP; SIMONE CRISTINA MEO NICIURA, CPPSE; ADRIANA MÉRCIA GUARATINI IBELLI, Programa de Pós-Graduação em Genética e Evolução – UFSCAR, São Carlos/SP; GISELE BATISTA VENERONI, Programa de Pós-Graduação em Genética e Evolução – UFSCAR, São Carlos/SP; FABIANE SIQUEIRA, CNPGC; LUIZ OTAVIO CAMPOS DA SILVA, CNPGC; ROBERTO AUGUSTO DE A TORRES JUNIOR, CNPGC; MAURICIO MELLO DE ALENCAR, CPPSE; LUCIANA CORREIA DE ALMEIDA REGITANO, CPPSE; ANTONIO DO NASCIMENTO ROSA, CNPGC. |
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Título: |
Caracterização do haplótipo mitocondrial de uma amostra de touros da raça nelore, representativa das principais linhagens comercializadas no Brasil. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Ciência Animal, v. 21, n. 1, p. 25-29, 2011 |
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Páginas: |
25-29 |
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Idioma: |
Português |
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Palavras-Chave: |
Haplótipo mitocondrial. |
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Thesagro: |
Bos indicus; Bos taurus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00853naa a2200265 a 4500
001 1937092
005 2012-10-18
008 2011 bl uuuu u00u1 u #d
100 1 $aTIZIOTO, P. C.
245 $aCaracterização do haplótipo mitocondrial de uma amostra de touros da raça nelore, representativa das principais linhagens comercializadas no Brasil.$h[electronic resource]
260 $c2011
300 $a25-29
650 $aBos indicus
650 $aBos taurus
653 $aHaplótipo mitocondrial
700 1 $aNICIURA, S. C. M.
700 1 $aIBELLI, A. M. G.
700 1 $aVENERONI, G. B.
700 1 $aSIQUEIRA, F.
700 1 $aSILVA, L. O. C. da
700 1 $aTORRES JUNIOR, R. A. de A.
700 1 $aALENCAR, M. M. de
700 1 $aREGITANO, L. C. de A.
700 1 $aROSA, A. do N.
773 $tCiência Animal$gv. 21, n. 1, p. 25-29, 2011
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