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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: |
22/02/2010 |
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Data da última atualização: |
11/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SIQUEIRA, L. G. B.; TORRES, C. A. A.; AMORIM, L. S.; SOUZA, E. D.; CAMARGO, L. S. de A.; FERNANDES, C. A. C.; VIANA, J. H. M. |
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Afiliação: |
LUIZ GUSTAVO B. SIQUEIRA, UFV; CIRO A. A. TORRES, UFV; LINCOLN S. AMORIM, UFV; ELIZA D. SOUZA; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL; CARLOS A. C. FERNANDES, Universidade de Alfenas; JOAO HENRIQUE MOREIRA VIANA, CNPGL. |
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Título: |
Interrelationships among morphology, echotexture, and function of the bovine corpus luteum during the estrous cycle. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Animal Reproduction Science, v. 115, n. 1/4, p. 18-28, 2009. |
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DOI: |
https://doi.org/10.1016/j.anireprosci.2008.11.009 |
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Idioma: |
Inglês |
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Conteúdo: |
It has been suggested that ultrasound image attributes are a potential indicator of physiological and functional status of the corpus luteum (CL) in several species, including cattle. The aims of this study were to evaluate CL morphological, functional and echotextural characteristics, and also to investigate the hypothesis that those attributes are correlated and change similarly throughout an estrous cycle. Ovaries of crossbred (Bos taurus taurus x Bos taurus indicus) heifers were evaluated using ultrasonography daily throughout an interestrus interval using a B-mode, real-time ultrasound machine equipped with a 5 MHz linear-array rectal transducer, during a natural estrous cycle (Experiment 1; n=12) or during a shortened cycle, with luteolysis induction 10d after estrus (Experiment 2; n=6). Blood samples were collected for assay of plasma progesterone concentrations. Corpora lutea areas were measured and daily images of each CL were videotaped and digitized for computer-assisted analysis using custom-developed software. In Experiment 1, area of luteal tissue increased until a maximum value 10d after estrus (P<0.001), followed by a plateau phase, and then a decline beginning 14 d after estrus. Luteal tissue area was highly correlated to plasma progesterone concentrations (r=0.86; P<0.001). When luteolysis was induced in Experiment 2, loss of CL function (decrease in plasma progesterone concentrations to metestrous values) preceded tissue regression by 48 h (24h compared with 72 h; P<0.001). The mean pixel value of ultrasound images did not change in Experiment 1 (P>0.70), but a day effect on this attribute was observed in Experiment 2 (P=0.052). In contrast, mean pixel value was correlated to plasma progesterone concentrations in Experiment 1 (r=-0.63; P<0.05), but not in Experiment 2 (r=-0.28; P>0.10). In regard to CL heterogeneity, defined as the standard deviation of the mean pixel value of the luteal tissue, a time effect was observed following both natural (Experiment 1; P<0.009) and luteolysis-induced (Experiment 2; P<0.05) estrous cycles (P<0.05). Moreover, this variable was correlated with plasma progesterone concentrations (r=-0.71 and -0.58 in Experiments 1 and 2, respectively; P<0.01), indicating that CL images were more heterogeneous during metestrus and after luteolysis (functional regression). In summary, morphological and echotextural attributes were correlated with CL function and underwent similar changes during the estrous cycle. Luteal tissue heterogeneity, assessed by ultrasonography, is considered a potential indicator of CL functional status, because it is correlated to circulating progesterone concentrations. MenosIt has been suggested that ultrasound image attributes are a potential indicator of physiological and functional status of the corpus luteum (CL) in several species, including cattle. The aims of this study were to evaluate CL morphological, functional and echotextural characteristics, and also to investigate the hypothesis that those attributes are correlated and change similarly throughout an estrous cycle. Ovaries of crossbred (Bos taurus taurus x Bos taurus indicus) heifers were evaluated using ultrasonography daily throughout an interestrus interval using a B-mode, real-time ultrasound machine equipped with a 5 MHz linear-array rectal transducer, during a natural estrous cycle (Experiment 1; n=12) or during a shortened cycle, with luteolysis induction 10d after estrus (Experiment 2; n=6). Blood samples were collected for assay of plasma progesterone concentrations. Corpora lutea areas were measured and daily images of each CL were videotaped and digitized for computer-assisted analysis using custom-developed software. In Experiment 1, area of luteal tissue increased until a maximum value 10d after estrus (P<0.001), followed by a plateau phase, and then a decline beginning 14 d after estrus. Luteal tissue area was highly correlated to plasma progesterone concentrations (r=0.86; P<0.001). When luteolysis was induced in Experiment 2, loss of CL function (decrease in plasma progesterone concentrations to metestrous values) preceded tissue regression by 48 h (24h compared wi... Mostrar Tudo |
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Palavras-Chave: |
Cattle-ultrasonography; Echotexture; Heterogeneity; Pixel. |
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Thesaurus Nal: |
animal reproduction; corpus luteum. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03582naa a2200277 a 4500
001 1658399
005 2022-08-11
008 2009 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.anireprosci.2008.11.009$2DOI
100 1 $aSIQUEIRA, L. G. B.
245 $aInterrelationships among morphology, echotexture, and function of the bovine corpus luteum during the estrous cycle.$h[electronic resource]
260 $c2009
520 $aIt has been suggested that ultrasound image attributes are a potential indicator of physiological and functional status of the corpus luteum (CL) in several species, including cattle. The aims of this study were to evaluate CL morphological, functional and echotextural characteristics, and also to investigate the hypothesis that those attributes are correlated and change similarly throughout an estrous cycle. Ovaries of crossbred (Bos taurus taurus x Bos taurus indicus) heifers were evaluated using ultrasonography daily throughout an interestrus interval using a B-mode, real-time ultrasound machine equipped with a 5 MHz linear-array rectal transducer, during a natural estrous cycle (Experiment 1; n=12) or during a shortened cycle, with luteolysis induction 10d after estrus (Experiment 2; n=6). Blood samples were collected for assay of plasma progesterone concentrations. Corpora lutea areas were measured and daily images of each CL were videotaped and digitized for computer-assisted analysis using custom-developed software. In Experiment 1, area of luteal tissue increased until a maximum value 10d after estrus (P<0.001), followed by a plateau phase, and then a decline beginning 14 d after estrus. Luteal tissue area was highly correlated to plasma progesterone concentrations (r=0.86; P<0.001). When luteolysis was induced in Experiment 2, loss of CL function (decrease in plasma progesterone concentrations to metestrous values) preceded tissue regression by 48 h (24h compared with 72 h; P<0.001). The mean pixel value of ultrasound images did not change in Experiment 1 (P>0.70), but a day effect on this attribute was observed in Experiment 2 (P=0.052). In contrast, mean pixel value was correlated to plasma progesterone concentrations in Experiment 1 (r=-0.63; P<0.05), but not in Experiment 2 (r=-0.28; P>0.10). In regard to CL heterogeneity, defined as the standard deviation of the mean pixel value of the luteal tissue, a time effect was observed following both natural (Experiment 1; P<0.009) and luteolysis-induced (Experiment 2; P<0.05) estrous cycles (P<0.05). Moreover, this variable was correlated with plasma progesterone concentrations (r=-0.71 and -0.58 in Experiments 1 and 2, respectively; P<0.01), indicating that CL images were more heterogeneous during metestrus and after luteolysis (functional regression). In summary, morphological and echotextural attributes were correlated with CL function and underwent similar changes during the estrous cycle. Luteal tissue heterogeneity, assessed by ultrasonography, is considered a potential indicator of CL functional status, because it is correlated to circulating progesterone concentrations.
650 $aanimal reproduction
650 $acorpus luteum
653 $aCattle-ultrasonography
653 $aEchotexture
653 $aHeterogeneity
653 $aPixel
700 1 $aTORRES, C. A. A.
700 1 $aAMORIM, L. S.
700 1 $aSOUZA, E. D.
700 1 $aCAMARGO, L. S. de A.
700 1 $aFERNANDES, C. A. C.
700 1 $aVIANA, J. H. M.
773 $tAnimal Reproduction Science$gv. 115, n. 1/4, p. 18-28, 2009.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Origem |
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Classificação |
Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
05/08/2002 |
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Data da última atualização: |
13/06/2019 |
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Autoria: |
BARBOSA, H. P.; COSTA, W.; FIALHO, E. T.; GOMES. P. C. |
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Afiliação: |
HACY PINTO BARBOSA, CNPSA; WALDOMIRO COSTA, CNPSA; EYAS TADEU FIALHO, CNPSA; PAULO CEZAR GOMES, CNPSA. |
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Título: |
Níveis protéicos e energético para leitões dos 10 aos 25 kg de peso vivo. |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 16, n. 5, p. 747-750, set./out. 1981 |
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Idioma: |
Português |
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Notas: |
Título em inglês: Protein and energy levels to pigs from 10 to 25 kg live weight. |
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Conteúdo: |
Cento e doze leitões Landrace (56 machos castrados e 56 fêmeas), com, aproximadamente, 40 dias de idade, foram usados em um trabalho de alimentação com a finalidade de se avaliar em diferentes níveis de energia e proteína. Utilizou-se um fatorial 2 x 2, correspondendo aos tratamentos A (3.300 kcal de ED/kg e 20% de proteína bruta), 13 (3.300 kcal de ED/kg e 18% de proteína bruta), C (3.500 kcal de ED/kg e 20%de proteína bruta e D (3.500kcalde ED/kg e 18% de proteína bruta). Todas as rações foram fornecidas à vontade e a resposta no desempenho foi comparada dos 10 aos 25 kg de peso vivo. As interações entre os níveis de proteína e os de energia não diferiram significativamente entre si quanto ao ganho médio diário (0,519; 0,492; 0,494 e 0,473 kg) e à conversão alimentar (1,90; 2,02; 1,87 e 1,96), respectivamente para os tratamentos A, 13, C e D. Independentemente do nível de energia estudado, a conversão alimentar obtida com o nível protéico de 20%, foi significativamente (P < 0,05) melhor que a obtida com o nível protéico de 181% (1,89, e 1,99). |
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Thesagro: |
Leitão; Proteína Bruta. |
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Thesaurus NAL: |
Crude protein; Piglets. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/198559/1/Niveis-proteicos-e-energeticos-para-leitoes.pdf
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Marc: |
LEADER 01777naa a2200217 a 4500
001 1107855
005 2019-06-13
008 1981 bl uuuu u00u1 u #d
100 1 $aBARBOSA, H. P.
245 $aNíveis protéicos e energético para leitões dos 10 aos 25 kg de peso vivo.
260 $c1981
500 $aTítulo em inglês: Protein and energy levels to pigs from 10 to 25 kg live weight.
520 $aCento e doze leitões Landrace (56 machos castrados e 56 fêmeas), com, aproximadamente, 40 dias de idade, foram usados em um trabalho de alimentação com a finalidade de se avaliar em diferentes níveis de energia e proteína. Utilizou-se um fatorial 2 x 2, correspondendo aos tratamentos A (3.300 kcal de ED/kg e 20% de proteína bruta), 13 (3.300 kcal de ED/kg e 18% de proteína bruta), C (3.500 kcal de ED/kg e 20%de proteína bruta e D (3.500kcalde ED/kg e 18% de proteína bruta). Todas as rações foram fornecidas à vontade e a resposta no desempenho foi comparada dos 10 aos 25 kg de peso vivo. As interações entre os níveis de proteína e os de energia não diferiram significativamente entre si quanto ao ganho médio diário (0,519; 0,492; 0,494 e 0,473 kg) e à conversão alimentar (1,90; 2,02; 1,87 e 1,96), respectivamente para os tratamentos A, 13, C e D. Independentemente do nível de energia estudado, a conversão alimentar obtida com o nível protéico de 20%, foi significativamente (P < 0,05) melhor que a obtida com o nível protéico de 181% (1,89, e 1,99).
650 $aCrude protein
650 $aPiglets
650 $aLeitão
650 $aProteína Bruta
700 1 $aCOSTA, W.
700 1 $aFIALHO, E. T.
700 1 $aGOMES. P. C.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 16, n. 5, p. 747-750, set./out. 1981
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Embrapa Unidades Centrais (AI-SEDE) |
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