The study was conducted to evaluate the effect of age at weaning and breed on the stress response of calves to weaning and their temperament. At calving, 14 Parda de Montaña calves and 14 Pirenaica calves were randomly assigned to either early weaning (at 90 days) or traditional weaning (at 150 days) treatment. During nursing, calves were allowed to suckle their dams twice a day for 30 min. Aft...

Estimates of heritabilities and genetic correlations were obtained for weaning weight records of 23,681 crossbred steers and heifers and carcass records from 4,094 crossbred steers using animal models. Carcass traits included hot carcass weight; retail product percentage; fat percentage; bone percentage; ribeye area; adjusted fat thickness; marbling score, Warner-Bratzler shear force and kidney...

Two nutritional levels following parturition and five weaning ages for the calf were evaluated to study their effect of reproduction in Gyr cows in the savannas of West Central Brazil (Campos Cerrados). Early weaning of calves reduced postpartum weight losses and shortened the postpartum interval to conception. Energy level did not affect cow weight at weaning or conception, the number of days ...

Background While the adverse metabolic effects of exposure to obesogenic diets during both the prenatal and early postnatal period are well established, the relative impact of exposure during these separate developmental windows remains unclear. This study aimed to assess the relative contribution of exposure to a maternal cafeteria diet during pregnancy and lactation on body weight, fat mass a...

The objective of the present study was to estimate genetic parameters for body weight at different ages in Arabi sheep using data collected from 1999 to 2009. Investigated traits consisted of birth weight (N = 2776), weaning weight (N = 2002) and weight at six months of age (N = 1885). The data were analyzed using restricted maximum likelihood analysis, by fitting univariate and multivaria...

Thirty-eight one day old female Holstein Friesian calves were raised on artificial rearing system. We are used in completely randomized design to evaluate the effects of using milk replacer on body growth and its economic feasibility. The results revealed that the pre-weaning weight gain, pre-weaning growth rate, weaning weight, post weaning growth rate and weight at final week (week twenty) of...

I. The reproductive performance of rats reared from weaning on a moderately proteindeficient (LP) diet containing Sogcaseinjkg, or on a control diet (HP) containing 250 g casein/kg has been studied. Although the rate of growth was reduced in LP animals, these rats eventually achieved the same adult weight and appearance as the controls. 2. Weight gain during the first z weeks of gestation was s...

OBJECTIVES OF THE SURVEY To evaluate infant feeding and weaning practices and anthropometric characteristics of 2-to 24-month-old children in Russia. SURVEY METHOD A comprehensive analysis of data collected from face-to-face interviews of a random Russia representative sample of 2,500 mothers of children. We used a specially designed questionnaire that includes sections on health, especially ...