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EFFECTS OF TWIN-FOSTER CALF REARING AND OF AGE AT WEANING ON COW AND CALF PERFORMANCE
Canadian Journal of Animal Science, 1982The effects of twin-foster calf rearing on calf weight at 200, 291 and 365 days postcalving, on calf weight produced per cow, and on reproductive performance of cows were evaluated using fall-born calves. Eleven Holstein × Angus or Holstein × Hereford 2- or 3-yr-old cows rearing 20 Holstein or Limousin crossbred calves were compared with cows of ...
J. G. ROSECRANS +3 more
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Effect of calf age on bovine viral diarrhea virus tests
Journal of Veterinary Diagnostic Investigation, 2021Bovine viral diarrhea virus (BVDV) causes significant economic loss in cattle. Detection of persistently infected (PI) animals is an important control measure, but persistence of maternal antibodies may result in false-negative test results. We assessed the sensitivity and specificity of 2 antigen ELISAs (Idexx BVDV Ag/Serum Plus and BVDV PI X2) and a ...
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Effect of Calf Weaning Age and Cow Supplementation on Cow Productivity
Journal of Animal Science, 1985Five years of data were collected on 124 Brangus-type cows to evaluate weaning calves at 8.5 or 10.5 mo of age and winter supplementation of the brood cow with 2.25 kg of molasses daily. Cows with calves weaned at 10.5 mg of age gained 14 kg less weight (P less than .01) during the late nursing period than did cows from which calves were earlier weaned.
F M, Pate, J R, Crockett, J D, Phillips
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Optimal calf insemination age as a reserve for increasing milk production
Legal regulation in veterinary medicine, 2023Increasing gross milk production is the main task of the dairy cattle industry. The level of milk productivity of a cow depends on the age and living mass of the calf at the first insemination. Under certain conditions, the technology of herd reproduction in the conditions of cattle breeding in a particular farm (maintenance technology, feeding ...
R. V. Paderina, N. D. Vinogradova
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Variations in Calf Plasma Composition with Age
British Veterinary Journal, 1967SUMMARY Plasma composition was investigated in calves whose ages ranged from a few hours after birth to 22 days. Significant variations with age were observed in plasma sodium, chloride, potassium and protein concentrations. Haematocrit and plasma osmolality did not vary significantly.
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Heterogeneity, aging and polypeptide composition of α-crystallin from calf lens
Experimental Eye Research, 1973Abstract Extracts from epithelial cells, seven successive concentric layers of the cortex, and the nucleus of calf lenses were submitted to gel chromatography on agarose Bio-Gel A-5m. In the mentioned order, corresponding to increasing age of the relevant lens cells, the content of α-crystallin in these extracts decreased significantly whereas the ...
H J, Hoenders +3 more
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Canadian Journal of Animal Science, 1986
A study was conducted to determine the effects of early weaning and preconditioning to feedlot on calf gain and the effects of early weaning on cow weight and reproductive performance. A total of 390 cow-calf pairs in 1982 and 460 in 1983, representing four breed, three age-of-dam groups and two-sex-of-calf groups, were randomly assigned to either an ...
J. A. BASARAB, F. S. NOVAK, D. B. KARREN
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A study was conducted to determine the effects of early weaning and preconditioning to feedlot on calf gain and the effects of early weaning on cow weight and reproductive performance. A total of 390 cow-calf pairs in 1982 and 460 in 1983, representing four breed, three age-of-dam groups and two-sex-of-calf groups, were randomly assigned to either an ...
J. A. BASARAB, F. S. NOVAK, D. B. KARREN
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Calf Pain in Middle-Aged Individuals as a Predictor of Ischemic Cerebrovascular Disease
Angiology, 1999In middle-aged individuals, calf pain while walking may be an early marker of general ized ischemic vascular disease. We investigated whether the symptom of calf pain while walking was a predictor of ischemic cerebrovascular disease (CVD). In a nested case control study, part of the Malmö Prevention Program Project, we evaluated 105 patients with ...
A.M. Elneihoum +4 more
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Effects of Ageing on Adaptation during Vibratory Stimulation of the Calf and Neck Muscles
Gerontology, 2008<i>Background:</i> The ability to adapt and habituate based on prior experiences is important for human movement control, fall prevention and for the ability to enhance performance during various human activities. However, little is known about the ability for the elderly to adapt to balance perturbations in the lateral direction.
M, Patel, P A, Fransson, M, Magnusson
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Influence of age, dietary protein and weaning on calf abomasal enzymic secretion
Journal of Dairy Research, 1977SummaryUsing fistulated calves, the influence of the age, type of dietary protein and weaning on the secretion of chymosin and pepsin by the abomasum were studied. The abomasum secreted both chymosin and pepsin when the animals were fed milk. Chymosin secretion appeared to be independent of the age of the animals, whereas a slow increase in pepsin ...
P. Garnot +6 more
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