A Study of Some of the Factors Influencing the Birth and Weaning Weights of Beef Calves

Gregory, K. E.; Blunn, Cecil T.; Baker, Marvel L.

doi:10.2527/jas1950.93338x

Cited by 41 publications

(19 citation statements)

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“…The correlation between birth weight and average daily gain was reported as .07 (P > .05) (Gregory et al, 1950), .32 (P < .05) (Christian et aI., 1965) and .44 (P < .01) (Gregory et aI., 1950) for Herefords. For crossbred cows, this correlation was .23 , .28 (P < .05) , .32 (Jeffery et aI., 1971b), .24 to .45 (Jeffery and Berg, 1972a) and .38 to .51 (P < .01) (Butson et aI., 1980).…”

Section: Birth Weight and Milk Production Calf Gain And Weaning Weightmentioning

confidence: 99%

“…The effect of sex on average daily gain ranged from non-significant (Gregory et aL, 1950;Holmes et aI., 1968) to males having significantly faster gains than heifers (Jeffery and Berg, J 5 1972b; Franke et aI., 1975;Wingery et aI., 1984;Nelms et aI., 1978;Melton et at, 1967b;Reynods et aI., 1978;). Bulls gained five percent faster than steers, which gained eight percent faster than heifers , and male calves gained .1 kg/day faster than heifers (Jeffery and Berg, 1972b).…”

Section: Calf Sex and Milk Production Calf Gain And Weaning Weightmentioning

confidence: 99%

See 1 more Smart Citation

Milk production of crossbred daughters of high- and low-milk EPD Angus and Hereford bulls.

Minick

Buchanan

Rupert

2001

Journal of Animal Science

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Section: Birth Weight and Milk Production Calf Gain And Weaning Weightmentioning

confidence: 99%

Section: Calf Sex and Milk Production Calf Gain And Weaning Weightmentioning

confidence: 99%

Milk production of crossbred daughters of high- and low-milk EPD Angus and Hereford bulls.

Minick

Buchanan

Rupert

2001

Journal of Animal Science

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“…Chambers ^ al. (1956) Repeatability estimates of weaning weight as measured by the regression of the first record on each later record or by the regression of the first record on the mean of subsequent records range from approximately 0.3 to 0.7 (Botkin and Whatley, 1953;Gregory et al, 1950;Koger and Knox, 1947). The intraclass correlations or repeatability estimates calculated in these data show that variations which may be attributed to differences between dams do vary with the trait being measured and that these differences do apparently change as the suckling period progresses.…”

Section: Ct^h + Ct^p + Ct^tmentioning

confidence: 84%

Beef calf weights at 100 days and 205 days as indicators of dams' producing ability

Drewry

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“…Gregory et al (1950) verificaram correlação de 0,21 entre o peso de bezerros ao nascimento e o peso de vacas imediatamente após o parto, valor bem mais baixo do que o verificado na pesquisa em pauta. Tais autores afirmaram que há influên-cia significativa do peso da vaca no peso das crias e que os bezerros que nasceram mais pesados tenderam a manter essa vantagem, o que corrobora os resultados do presente estudo.…”

Section: Resultsunclassified

Hemograma e proteínas de fase aguda de bezerros sadios do nascimento aos 30 dias de idade

Rocha

Nociti²,

Sampaio³

et al. 2013

Pesq. Vet. Bras.

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Pesq. Vet. Bras. 33(Supl.1):25-31, dezembro 2013 25 RESUMO.-O conhecimento da dinâmica das alterações nos parâmetros hematológicos e na cinética das proteínas de fase aguda em animais saudáveis nas primeiras semanas de vida é essencial para a interpretação correta dessas avaliações em situações de morbidez e para diferenciar animais sadios e enfermos de forma confiável. Com o intuito de avaliar a cinética desses parâmetros no primeiro mês de vida de bezerros de corte sadios, filhos de vacas primíparas ou pluríparas, amostras de sangue foram coletadas antes da ingestão de colostro e 1, 2, 7, 15 e 30 dias após o nascimento. Os parâmetros eritrocitários foram influenciados pelo número de partos das vacas e o leucograma mostrou alterações características de influência do cortisol fetal liberado por ocasião do nascimento. O teor sérico de proteína total aumentou significativamente após a ingestão do colostro. As concentrações de ceruloplasmina, haptoglobina e proteínas de pesos moleculares 33 kDa e 23 kDa aumentaram significativamente no primeiro dia de vida, seja pela resposta ao nascimento ou pela ingestão do colostro, enquanto os teores de transferrina, albumina e α 1 -glicoproteína ácida mantiveram-se relativamente estáveis nos primeiros dias de vida, aumentando gradualmente até os 30 dias de idade. The knowledge of the dynamic in changes of hematologic parameters and the acute phase proteins kinetics in healthy animals in the first weeks of life is essential for the accurate interpretation of these evaluations in morbidity situations, and to reliably differentiate healthy from sick animals. The aim of the study was to evaluate the dynamic of these parameters in the first month of life of healthy beef calves, born from primiparous or multiparous cows, and so blood samples were collected before colostrum intake and 1, 2, 7, 15 and 30 days thereafter to evaluate hemogram and serum proteinogram. The red cell parameters were influenced by the parturition number of cows, and the leukogram showed characteristic changes of the release of fetal cortisol at birth. The total protein level significantly increased after colostrum intake. The concentrations of acute phase proteins ceruloplasmin, haptoglobin and proteins of molecular weight 33 kDa and 23 kDa significantly increased in the first day of life, influenced either by response to birth or colostrum intake, while the levels of transferrin, albumin and α 1 -acid glycoprotein were relatively stable in the first days, increasing gradually until 30 days of life.INDEX TERMS: Cattle, newborn, hematology, acute phase proteins, SDS-PAGE.

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A Study of Some of the Factors Influencing the Birth and Weaning Weights of Beef Calves

Cited by 41 publications

References 0 publications

Milk production of crossbred daughters of high- and low-milk EPD Angus and Hereford bulls.

Milk production of crossbred daughters of high- and low-milk EPD Angus and Hereford bulls.

Beef calf weights at 100 days and 205 days as indicators of dams' producing ability

Hemograma e proteínas de fase aguda de bezerros sadios do nascimento aos 30 dias de idade

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