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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: |
26/12/2018 |
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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: |
LEÃO, J. M.; COELHO, S. G.; MACHADO, F. S.; AZEVEDO, R. A.; LIMA, J. A. M.; CARNEIRO, J. da C.; LAGE, C. F. A.; FERREIRA, A. L.; PEREIRA, L. G. R.; TOMICH, T. R.; CAMPOS, M. M. |
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Afiliação: |
FERNANDA SAMARINI MACHADO, CNPGL; JAILTON DA COSTA CARNEIRO, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; MARIANA MAGALHAES CAMPOS, CNPGL. |
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Título: |
Phenotypically divergent classification of preweaned heifer calves for feed efficiency indexes and their correlations with heat production and thermography. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Journal of Dairy Science, v. 101, n. 6, p. 5060-5068, 2018. |
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DOI: |
10.3168/jds.2017-14109 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract The aims of this study were (1) to assess if there is phenotypical divergence for feed efficiency (FE) during the preweaning phase; (2) if FE is correlated with heat production (HP) measured by the face mask method or (3) by surface skin temperature via thermography, and (4) whether these methods are applicable to preweaned calves. Holstein × Gyr heifer calves (n = 36, birth body weight = 32.4 ± 6.6 kg) were enrolled and on trial between 4 and 12 wk of age and were classified into 2 residual feed intake (RFI) and residual body weight gain (RG) groups: high efficiency (HE; RFI, n = 10; and RG, n = 9) and low efficiency (LE; RFI, n = 10; and RG, n = 8). Calves were fed milk (6 L/d) and solid feed (95% starter and 5% chopped Tifton 85 hay, as fed). Growth was monitored weekly and feed intake (milk and solid feed) daily, during the whole period. Gas exchanges (O2 consumption and production of CO2 and CH4) were obtained using a face mask at 45 ± 5 d of age and HP was estimated. Maximum temperatures were measured at 7 sites with an infrared camera at 62 ± 7 d of age. There was divergence in RFI and RG. Respectively, HE and LE calves had RFI of -0.14 and 0.13 kg/d, and RG of 0.05 and -0.07 kg/d. Dry matter intake was 15% lower in HE-RFI compared with LE-RFI, but no differences were observed in average daily weight gain. Within the RG test, no differences were observed in dry matter intake or average daily gain. The HE-RFI calves consumed less O2 (L/d) and produced less CO2 (L/d). Heart rate and HP were lower for HE-RFI calves compared with LE-RFI. Residual feed intake was correlated with HP (r = 0.48), O2 consumption (r = 0.48), CO2 production (r = 0.48), and heart rate (r = 0.40). No differences were observed in HP and gas exchanges between RG groups. Methane production was null in both groups. Eye temperature measured by thermography was 0.5°C greater in HE-RG than LE-RG calves. Differences in skin temperature between HE and LE calves were not observed at the other sites. These results support the hypothesis that calves are divergent for RFI, RG, and FE during preweaning and divergence tests are applicable during this phase. The face mask method described here is a useful tool for estimating differences in HP among phenotypically divergent RFI calves. Eye temperature measured by infrared thermography may have potential to screen phenotypically divergent RG calves. MenosAbstract The aims of this study were (1) to assess if there is phenotypical divergence for feed efficiency (FE) during the preweaning phase; (2) if FE is correlated with heat production (HP) measured by the face mask method or (3) by surface skin temperature via thermography, and (4) whether these methods are applicable to preweaned calves. Holstein × Gyr heifer calves (n = 36, birth body weight = 32.4 ± 6.6 kg) were enrolled and on trial between 4 and 12 wk of age and were classified into 2 residual feed intake (RFI) and residual body weight gain (RG) groups: high efficiency (HE; RFI, n = 10; and RG, n = 9) and low efficiency (LE; RFI, n = 10; and RG, n = 8). Calves were fed milk (6 L/d) and solid feed (95% starter and 5% chopped Tifton 85 hay, as fed). Growth was monitored weekly and feed intake (milk and solid feed) daily, during the whole period. Gas exchanges (O2 consumption and production of CO2 and CH4) were obtained using a face mask at 45 ± 5 d of age and HP was estimated. Maximum temperatures were measured at 7 sites with an infrared camera at 62 ± 7 d of age. There was divergence in RFI and RG. Respectively, HE and LE calves had RFI of -0.14 and 0.13 kg/d, and RG of 0.05 and -0.07 kg/d. Dry matter intake was 15% lower in HE-RFI compared with LE-RFI, but no differences were observed in average daily weight gain. Within the RG test, no differences were observed in dry matter intake or average daily gain. The HE-RFI calves consumed less O2 (L/d) and produced less CO2... Mostrar Tudo |
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Palavras-Chave: |
Residual feed intake; Residual gain. |
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Thesaurus Nal: |
Calorimetry; Thermography. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03359naa a2200301 a 4500
001 2102487
005 2023-01-24
008 2018 bl uuuu u00u1 u #d
024 7 $a10.3168/jds.2017-14109$2DOI
100 1 $aLEÃO, J. M.
245 $aPhenotypically divergent classification of preweaned heifer calves for feed efficiency indexes and their correlations with heat production and thermography.$h[electronic resource]
260 $c2018
520 $aAbstract The aims of this study were (1) to assess if there is phenotypical divergence for feed efficiency (FE) during the preweaning phase; (2) if FE is correlated with heat production (HP) measured by the face mask method or (3) by surface skin temperature via thermography, and (4) whether these methods are applicable to preweaned calves. Holstein × Gyr heifer calves (n = 36, birth body weight = 32.4 ± 6.6 kg) were enrolled and on trial between 4 and 12 wk of age and were classified into 2 residual feed intake (RFI) and residual body weight gain (RG) groups: high efficiency (HE; RFI, n = 10; and RG, n = 9) and low efficiency (LE; RFI, n = 10; and RG, n = 8). Calves were fed milk (6 L/d) and solid feed (95% starter and 5% chopped Tifton 85 hay, as fed). Growth was monitored weekly and feed intake (milk and solid feed) daily, during the whole period. Gas exchanges (O2 consumption and production of CO2 and CH4) were obtained using a face mask at 45 ± 5 d of age and HP was estimated. Maximum temperatures were measured at 7 sites with an infrared camera at 62 ± 7 d of age. There was divergence in RFI and RG. Respectively, HE and LE calves had RFI of -0.14 and 0.13 kg/d, and RG of 0.05 and -0.07 kg/d. Dry matter intake was 15% lower in HE-RFI compared with LE-RFI, but no differences were observed in average daily weight gain. Within the RG test, no differences were observed in dry matter intake or average daily gain. The HE-RFI calves consumed less O2 (L/d) and produced less CO2 (L/d). Heart rate and HP were lower for HE-RFI calves compared with LE-RFI. Residual feed intake was correlated with HP (r = 0.48), O2 consumption (r = 0.48), CO2 production (r = 0.48), and heart rate (r = 0.40). No differences were observed in HP and gas exchanges between RG groups. Methane production was null in both groups. Eye temperature measured by thermography was 0.5°C greater in HE-RG than LE-RG calves. Differences in skin temperature between HE and LE calves were not observed at the other sites. These results support the hypothesis that calves are divergent for RFI, RG, and FE during preweaning and divergence tests are applicable during this phase. The face mask method described here is a useful tool for estimating differences in HP among phenotypically divergent RFI calves. Eye temperature measured by infrared thermography may have potential to screen phenotypically divergent RG calves.
650 $aCalorimetry
650 $aThermography
653 $aResidual feed intake
653 $aResidual gain
700 1 $aCOELHO, S. G.
700 1 $aMACHADO, F. S.
700 1 $aAZEVEDO, R. A.
700 1 $aLIMA, J. A. M.
700 1 $aCARNEIRO, J. da C.
700 1 $aLAGE, C. F. A.
700 1 $aFERREIRA, A. L.
700 1 $aPEREIRA, L. G. R.
700 1 $aTOMICH, T. R.
700 1 $aCAMPOS, M. M.
773 $tJournal of Dairy Science$gv. 101, n. 6, p. 5060-5068, 2018.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
26/09/1996 |
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Data da última atualização: |
13/07/2018 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
WAQUIL, J. M. |
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Afiliação: |
EMBRAPA-CNPMS. |
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Título: |
Desenvolvimento populacional da mosca do sorgo Contarinia sorghicola (Coq., 1898). |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 7., 1981, Fortaleza. [Resumos]. Fortaleza: SEB, 1981. p. 20. |
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Idioma: |
Português |
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Conteúdo: |
A mosca do sorgo, Contarinia sorghicola (Coquillett, 1898) (Diptera: Cecidomyiidae) constitui um dos serios problemas na producao de graos de sorgo no Brasil e em outras regioes do mundo. Os adultos da mosca do sorgo tem um periodo curto de vida e uma limitada capacidade de voo. Isto restringe o deslocamento de populacoes desses insetos somente a curtas distancias para a oviposicao. Portanto, para efeito de especulacao, os picos populacionais dependem da biologia do inseto e de suas relacoes com os hospedeiros e ambiente. Para estudar o desenvolvimento populacional da mosca do sorgo em condicoes de campo foram feitas observacoes e 5 epocas de plantio. Em cada epoca cerca de 5 paniculas de sorgo, na fase de antese, foram infestadas artificialmente + ou - 300 adultos por um periodo de 2 horas. A partir do dia seguinte a infestacao, diariamente foram colhidas cerca de 80 espiguetas e levadas para o laboratorio onde se observava no minimo 70 individuos. Estes dados indicam: 1. O ciclo biologico da mosca do sorgo varia em funcao da epoca e tende a se alongar nos meses mais frios. 2. O ciclo biologico varia dentro de uma mesma epoca, onde se observa individuos completando o ciclo com 18 dias e outros gastando mais 31 dias para isto. 3. A frequencia de larvas em diapausa foi baixa no verao, em torno de 3%, e atingiu 17% em abril. 4. Em condicoes de campo onde ha paniculas hospedeiros se expoe a oviposicao por periodos maiores, ha superposicao de geracoes a flutuacao populacional fica em funcao unica de condicoes ambientais MenosA mosca do sorgo, Contarinia sorghicola (Coquillett, 1898) (Diptera: Cecidomyiidae) constitui um dos serios problemas na producao de graos de sorgo no Brasil e em outras regioes do mundo. Os adultos da mosca do sorgo tem um periodo curto de vida e uma limitada capacidade de voo. Isto restringe o deslocamento de populacoes desses insetos somente a curtas distancias para a oviposicao. Portanto, para efeito de especulacao, os picos populacionais dependem da biologia do inseto e de suas relacoes com os hospedeiros e ambiente. Para estudar o desenvolvimento populacional da mosca do sorgo em condicoes de campo foram feitas observacoes e 5 epocas de plantio. Em cada epoca cerca de 5 paniculas de sorgo, na fase de antese, foram infestadas artificialmente + ou - 300 adultos por um periodo de 2 horas. A partir do dia seguinte a infestacao, diariamente foram colhidas cerca de 80 espiguetas e levadas para o laboratorio onde se observava no minimo 70 individuos. Estes dados indicam: 1. O ciclo biologico da mosca do sorgo varia em funcao da epoca e tende a se alongar nos meses mais frios. 2. O ciclo biologico varia dentro de uma mesma epoca, onde se observa individuos completando o ciclo com 18 dias e outros gastando mais 31 dias para isto. 3. A frequencia de larvas em diapausa foi baixa no verao, em torno de 3%, e atingiu 17% em abril. 4. Em condicoes de campo onde ha paniculas hospedeiros se expoe a oviposicao por periodos maiores, ha superposicao de geracoes a flutuacao populacional fi... Mostrar Tudo |
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Palavras-Chave: |
Mosca do sorgo; Pest; Sorghum midge. |
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Thesagro: |
Contarinia Sorghicola; Praga; Sorghum Bicolor; Sorgo. |
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Categoria do assunto: |
O Insetos e Entomologia |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/472706/1/Desenvolvimentopopulacional.pdf
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Marc: |
LEADER 02152nam a2200193 a 4500
001 1472706
005 2018-07-13
008 1981 bl uuuu u00u1 u #d
100 1 $aWAQUIL, J. M.
245 $aDesenvolvimento populacional da mosca do sorgo Contarinia sorghicola (Coq., 1898).$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 7., 1981, Fortaleza. [Resumos]. Fortaleza: SEB, 1981. p. 20.$c1981
520 $aA mosca do sorgo, Contarinia sorghicola (Coquillett, 1898) (Diptera: Cecidomyiidae) constitui um dos serios problemas na producao de graos de sorgo no Brasil e em outras regioes do mundo. Os adultos da mosca do sorgo tem um periodo curto de vida e uma limitada capacidade de voo. Isto restringe o deslocamento de populacoes desses insetos somente a curtas distancias para a oviposicao. Portanto, para efeito de especulacao, os picos populacionais dependem da biologia do inseto e de suas relacoes com os hospedeiros e ambiente. Para estudar o desenvolvimento populacional da mosca do sorgo em condicoes de campo foram feitas observacoes e 5 epocas de plantio. Em cada epoca cerca de 5 paniculas de sorgo, na fase de antese, foram infestadas artificialmente + ou - 300 adultos por um periodo de 2 horas. A partir do dia seguinte a infestacao, diariamente foram colhidas cerca de 80 espiguetas e levadas para o laboratorio onde se observava no minimo 70 individuos. Estes dados indicam: 1. O ciclo biologico da mosca do sorgo varia em funcao da epoca e tende a se alongar nos meses mais frios. 2. O ciclo biologico varia dentro de uma mesma epoca, onde se observa individuos completando o ciclo com 18 dias e outros gastando mais 31 dias para isto. 3. A frequencia de larvas em diapausa foi baixa no verao, em torno de 3%, e atingiu 17% em abril. 4. Em condicoes de campo onde ha paniculas hospedeiros se expoe a oviposicao por periodos maiores, ha superposicao de geracoes a flutuacao populacional fica em funcao unica de condicoes ambientais
650 $aContarinia Sorghicola
650 $aPraga
650 $aSorghum Bicolor
650 $aSorgo
653 $aMosca do sorgo
653 $aPest
653 $aSorghum midge
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Embrapa Milho e Sorgo (CNPMS) |
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