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Registro Completo |
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
31/05/1996 |
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Data da última atualização: |
31/05/1996 |
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Autoria: |
MONTEIRO, L. S. |
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Título: |
The relative size of calf and dam and the frequency of calving difficulties. |
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Ano de publicação: |
1969 |
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Fonte/Imprenta: |
Animal Production, v. 11, n. 3, p. 293-306, Aug., 1969. |
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Idioma: |
Inglês |
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Conteúdo: |
The frequencies of calving difficulties were computed for 458 calvingsof first and second parity Friesian, Ayrshire and Jersey dams with pure and crossbred progeny in all possible combinations. It was found that heavier breeds of dams have higher frequency of difficult calvings. For each breed of dam there is also a direct relationship between the mean birth weight of the calves and the frequency of calving difficulties associated with the breed or cross of calf. An index of calving difficulties calculated in the form of a discriminant function which combined both the birth weight of the calf and the calving weight and parity of the dam was: Z = log BW - 0.40 log DW - 0.10 P, where Z is the index of calving difficulties, BW and DW are respectively the birth and dam weight and P the parity variable with the values of one for second parity and zero for the first. To relate the values of the index with the frequencies of calving difficulties a probit transformation wasused. The mean values of the probabilities for different breeds and parities of dams obtained from the index and the probit regression have shown a good agreement with the observed frequencies of calving difficulties. The use of the index for predicting calving difficulties in experimental crosses where the birth weight of the calf is not known wasalso described. The possible methods of reducing calving difficulties and limitations in the use of the index were discussed. |
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Palavras-Chave: |
Parto distocico. |
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Thesagro: |
Bovino. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01867naa a2200145 a 4500
001 1052896
005 1996-05-31
008 1969 bl --- 0-- u #d
100 1 $aMONTEIRO, L. S.
245 $aThe relative size of calf and dam and the frequency of calving difficulties.
260 $c1969
520 $aThe frequencies of calving difficulties were computed for 458 calvingsof first and second parity Friesian, Ayrshire and Jersey dams with pure and crossbred progeny in all possible combinations. It was found that heavier breeds of dams have higher frequency of difficult calvings. For each breed of dam there is also a direct relationship between the mean birth weight of the calves and the frequency of calving difficulties associated with the breed or cross of calf. An index of calving difficulties calculated in the form of a discriminant function which combined both the birth weight of the calf and the calving weight and parity of the dam was: Z = log BW - 0.40 log DW - 0.10 P, where Z is the index of calving difficulties, BW and DW are respectively the birth and dam weight and P the parity variable with the values of one for second parity and zero for the first. To relate the values of the index with the frequencies of calving difficulties a probit transformation wasused. The mean values of the probabilities for different breeds and parities of dams obtained from the index and the probit regression have shown a good agreement with the observed frequencies of calving difficulties. The use of the index for predicting calving difficulties in experimental crosses where the birth weight of the calf is not known wasalso described. The possible methods of reducing calving difficulties and limitations in the use of the index were discussed.
650 $aBovino
653 $aParto distocico
773 $tAnimal Production$gv. 11, n. 3, p. 293-306, Aug., 1969.
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Registro original: |
Embrapa Meio-Norte (CPAMN) |
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
30/08/2016 |
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Data da última atualização: |
30/08/2016 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SILVEIRA, J. M.; OLIVEIRA, M. C. N. de; STEFANELO, S. C. B.; DALCHIAVON, F. C.; BIEZUS, E. C.; BIEZUS JUNIOR, I. L.; MACHADO, D. H.; HIOLANDA, R.; OLIVEIRA, V. H. S.; VIEIRA, D. B.; JASKULSKI, E.; KIMECZ, A. M. |
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Afiliação: |
JOSE MIGUEL SILVEIRA, CNPSO; MARIA CRISTINA NEVES DE OLIVEIRA, CNPSO; Fazenda Porta do Céu - MT; IFMT; IFMT; IFMT; IFMT; IFMT; IFMT; IFMT; IFMT; IFMT. |
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Título: |
Diagnóstico preliminar de perdas de grãos na colheita de soja em Campo Novo do Parecis (MT) na safra 2015/2016. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: REUNIÃO DE PESQUISA DE SOJA, 35., Londrina, 2016. Resumos expandidos... Londrina: Embrapa Soja, 2016. |
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Páginas: |
p. 36-38. |
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Idioma: |
Português |
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Notas: |
(Embrapa Soja. Documentos, 372). |
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Thesagro: |
Soja. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/146876/1/RPS2016-36-38.pdf
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Marc: |
LEADER 00885nam a2200265 a 4500
001 2052018
005 2016-08-30
008 2016 bl uuuu u00u1 u #d
100 1 $aSILVEIRA, J. M.
245 $aDiagnóstico preliminar de perdas de grãos na colheita de soja em Campo Novo do Parecis (MT) na safra 2015/2016.$h[electronic resource]
260 $aIn: REUNIÃO DE PESQUISA DE SOJA, 35., Londrina, 2016. Resumos expandidos... Londrina: Embrapa Soja$c2016
300 $ap. 36-38.
500 $a(Embrapa Soja. Documentos, 372).
650 $aSoja
700 1 $aOLIVEIRA, M. C. N. de
700 1 $aSTEFANELO, S. C. B.
700 1 $aDALCHIAVON, F. C.
700 1 $aBIEZUS, E. C.
700 1 $aBIEZUS JUNIOR, I. L.
700 1 $aMACHADO, D. H.
700 1 $aHIOLANDA, R.
700 1 $aOLIVEIRA, V. H. S.
700 1 $aVIEIRA, D. B.
700 1 $aJASKULSKI, E.
700 1 $aKIMECZ, A. M.
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