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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: |
14/02/2017 |
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Data da última atualização: |
30/01/2023 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Autoria: |
OSS, D. B.; MARCONDES, M. I.; MACHADO, F. S.; TOMICH, T. R.; CHIZZOTTI, M. L.; CAMPOS, M. M.; PEREIRA, L. G. R. |
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Afiliação: |
D. B. OSS, UFV; CAPES; M. I. MARCONDES, UFV; FERNANDA SAMARINI MACHADO, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; M. L. CHIZZOTTI, UFV; MARIANA MAGALHAES CAMPOS, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL. |
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Título: |
Technical note: Assessment of the oxygen pulse and heart rate method using respiration chambers and comparative slaughter for measuring heat production of cattle. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Journal of Dairy Science, v. 99, n. 11, p. 8885-8890, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract The objective of this study was to assess the oxygen pulse and heart rate (O2P-HR) technique using the respiration chamber (RC) and comparative slaughter (CS) methods for measuring the heat production (HP) of crossbred (Holstein × Gyr) yearling bulls. Twenty-four bulls were used. Six bulls were slaughtered at the beginning of the experiment as a reference group to estimate the initial empty body weight (BW) and energy content of the remaining animals. The remaining bulls were assigned to a completely randomized design with 3 levels of dry matter intake, with 6 replicates. The levels of dry matter intake were 1.2% of BW, 1.8% of BW and ad libitum, with target orts of 5%. The bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a dry matter basis. The HP (kcal/BW0.75) was measured using 3 techniques, first using O2P-HR, followed by the RC and CS methods. The HP did not differ among assessed techniques, averaging 162.7kcal/BW0.75. The intercepts of the linear regressions (mean ± SE) were 64.82±25.515 (H0: intercept=0; P=0.024), 33.77±13.418 (H0: intercept=0), and 50.02±27.495 (H0: intercept=0) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The slopes of the linear regressions were 0.59±0.153 (H0: slope=1), 0.88±0.081 (H0: slope=1), and 0.62±0.155 (H0: slope=1) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The coefficients of determination were 0.52, 0.90, and 0.52 for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The concordance correlation coefficients, 0.70 and 0.68, were moderate for O2P-HR versus RC and O2P-HR versus CS, respectively, but high, 0.90, for CS versus RC. The between-animal coefficient of variation was greater for the O2P-HR method (16.6%) compared with RC (7.7%) or CS (6.7%). We conclude that there was an agreement among the HP measurements detected using the assessed methods and that O2P-HR is able to predict HP in cattle with great accuracy but only moderate precision. Therefore, the O2P-HR method may have limitations in terms of assessing HP in low numbers of replications due to greater between-animal coefficient of variation than either the RC or CS methods. MenosAbstract The objective of this study was to assess the oxygen pulse and heart rate (O2P-HR) technique using the respiration chamber (RC) and comparative slaughter (CS) methods for measuring the heat production (HP) of crossbred (Holstein × Gyr) yearling bulls. Twenty-four bulls were used. Six bulls were slaughtered at the beginning of the experiment as a reference group to estimate the initial empty body weight (BW) and energy content of the remaining animals. The remaining bulls were assigned to a completely randomized design with 3 levels of dry matter intake, with 6 replicates. The levels of dry matter intake were 1.2% of BW, 1.8% of BW and ad libitum, with target orts of 5%. The bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a dry matter basis. The HP (kcal/BW0.75) was measured using 3 techniques, first using O2P-HR, followed by the RC and CS methods. The HP did not differ among assessed techniques, averaging 162.7kcal/BW0.75. The intercepts of the linear regressions (mean ± SE) were 64.82±25.515 (H0: intercept=0; P=0.024), 33.77±13.418 (H0: intercept=0), and 50.02±27.495 (H0: intercept=0) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The slopes of the linear regressions were 0.59±0.153 (H0: slope=1), 0.88±0.081 (H0: slope=1), and 0.62±0.155 (H0: slope=1) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The coefficients of determination were 0.52, 0.90, and 0.52 for O2P-HR versus RC, CS vers... Mostrar Tudo |
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Palavras-Chave: |
Oxygen pulse. |
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Thesaurus Nal: |
heart rate; heat production. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02973naa a2200229 a 4500
001 2063981
005 2023-01-30
008 2016 bl uuuu u00u1 u #d
100 1 $aOSS, D. B.
245 $aTechnical note$bAssessment of the oxygen pulse and heart rate method using respiration chambers and comparative slaughter for measuring heat production of cattle.$h[electronic resource]
260 $c2016
520 $aAbstract The objective of this study was to assess the oxygen pulse and heart rate (O2P-HR) technique using the respiration chamber (RC) and comparative slaughter (CS) methods for measuring the heat production (HP) of crossbred (Holstein × Gyr) yearling bulls. Twenty-four bulls were used. Six bulls were slaughtered at the beginning of the experiment as a reference group to estimate the initial empty body weight (BW) and energy content of the remaining animals. The remaining bulls were assigned to a completely randomized design with 3 levels of dry matter intake, with 6 replicates. The levels of dry matter intake were 1.2% of BW, 1.8% of BW and ad libitum, with target orts of 5%. The bulls were fed a diet consisting of 59.6% corn silage and 40.4% concentrate on a dry matter basis. The HP (kcal/BW0.75) was measured using 3 techniques, first using O2P-HR, followed by the RC and CS methods. The HP did not differ among assessed techniques, averaging 162.7kcal/BW0.75. The intercepts of the linear regressions (mean ± SE) were 64.82±25.515 (H0: intercept=0; P=0.024), 33.77±13.418 (H0: intercept=0), and 50.02±27.495 (H0: intercept=0) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The slopes of the linear regressions were 0.59±0.153 (H0: slope=1), 0.88±0.081 (H0: slope=1), and 0.62±0.155 (H0: slope=1) for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The coefficients of determination were 0.52, 0.90, and 0.52 for O2P-HR versus RC, CS versus RC, and O2P-HR versus CS, respectively. The concordance correlation coefficients, 0.70 and 0.68, were moderate for O2P-HR versus RC and O2P-HR versus CS, respectively, but high, 0.90, for CS versus RC. The between-animal coefficient of variation was greater for the O2P-HR method (16.6%) compared with RC (7.7%) or CS (6.7%). We conclude that there was an agreement among the HP measurements detected using the assessed methods and that O2P-HR is able to predict HP in cattle with great accuracy but only moderate precision. Therefore, the O2P-HR method may have limitations in terms of assessing HP in low numbers of replications due to greater between-animal coefficient of variation than either the RC or CS methods.
650 $aheart rate
650 $aheat production
653 $aOxygen pulse
700 1 $aMARCONDES, M. I.
700 1 $aMACHADO, F. S.
700 1 $aTOMICH, T. R.
700 1 $aCHIZZOTTI, M. L.
700 1 $aCAMPOS, M. M.
700 1 $aPEREIRA, L. G. R.
773 $tJournal of Dairy Science$gv. 99, n. 11, p. 8885-8890, 2016.
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Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
13/02/2017 |
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Data da última atualização: |
09/04/2024 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
ROSA, P. M. Da S.; BARROS, B. A. F. De; PASOLINI, R.; CAMARGO, A. J. Dos R.; SERAPIÃO, R. V.; OLIVEIRA, C. S. |
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Afiliação: |
PAOLA MARIA DA SILVA ROSA; BEATRIZ ABDALLA FERRAZ DE BARROS; RENATA PASOLINI, PESARO/RIO; AGOSTINHO JORGE DOS REIS CAMARGO, PESAGRO; RAQUEL VARELLA SERAPIÃO, PESAGRO/RIO; CLARA SLADE OLIVEIRA, CNPGL. |
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Título: |
Hormonal ovulation induction in prepubertal GYR heifers |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONGRESS ON ANIMAL REPRODUCTION, 18., 2016, Tours. Abstracts... Tours: Society for Reproductive Biology, 2016. |
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Páginas: |
p. 516-517. |
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Idioma: |
Inglês |
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Palavras-Chave: |
Follicular dynamics. |
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Thesagro: |
Bos Indicus. |
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Thesaurus NAL: |
progesterone. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1063718/1/Hormonal-ovulation-induction.pdf
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Marc: |
LEADER 00684nam a2200205 a 4500
001 2063718
005 2024-04-09
008 2016 bl uuuu u00u1 u #d
100 1 $aROSA, P. M. Da S.
245 $aHormonal ovulation induction in prepubertal GYR heifers$h[electronic resource]
260 $aIn: INTERNATIONAL CONGRESS ON ANIMAL REPRODUCTION, 18., 2016, Tours. Abstracts... Tours: Society for Reproductive Biology$c2016
300 $ap. 516-517.
650 $aprogesterone
650 $aBos Indicus
653 $aFollicular dynamics
700 1 $aBARROS, B. A. F. De
700 1 $aPASOLINI, R.
700 1 $aCAMARGO, A. J. Dos R.
700 1 $aSERAPIÃO, R. V.
700 1 $aOLIVEIRA, C. S.
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