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Colostrum quality and importance of colostrum consumption in thermogenesis and metabolism of calves neonates

Abstract

Dairy calves performance is associated with management practices and physiological processes related to colostrum feeding. The aim of this project is evaluation of simple methods to ensure good colostrum protocols and the effect of colostrum intake on thermogenesis and metabolism of calves. To determine the best time to estimate calf´s blood immunoglobulin concentration by total protein, blood samples will be collected at 0, 2, 4, 6, 8, 12, 18, 24, 48, 72 and 96 hours after birth. In the third experiment 30 calves of the Holstein breed, which will be separated from their mothers shortly after birth, being heavy and colostrum fed will be used. Blood samples will be taken at times 0, 1, 2, 4, 6, 12, 24 and 48 hours after birth. In the fifth experiment, the animals will be divided into 3 groups, which receive 2, 3 and 4 L of colostrum. After colostrum feeding (48 hours) the animals will be kept in room temperature of 22 ºC for 1 hour, rectal temperature and blood samples being taken. Then be placed in a room at 6 ºC, where they will remain for 120 minutes, blood samples being taken at 0, 15 , 30 , 45, 60, 75, 90, 105 and 120 minutes. The physiological parameters will be taken at the same times of blood collection. In the sixth experiment, will evaluate the field performance of the animals fifth experiment, the animals of the three groups will receive 6 L of milk replacer in two meals, starter feed and water at will. In the seventh experiment, 30 calves will be used, which will be housed in individual cages in closed sheds with controlled temperature: 26 °C or 14 °C. The animals receive 6 L of milk replacer in two meals, initial concentrate and water at will, with performance monitored. In blood samples analysis to determine glucose, lactate, total protein, plasma free (NEFA), albumin, cortisol, IgG, insulin, T3 and T4, hematocrit, WBC, ² - hydroxybutyrate fatty acids will be performed . (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SILVA, FERNANDA LAVINIA MOURA; MIQUEO, EVANGELINA; SILVA, MARCOS DONIZETE DA; TORREZAN, THAIS MANZONI; ROCHA, NATHALIA BRITO; SALLES, MARCIA SALADINI VIEIRA; BITTAR, CARLA MARIS MACHADO. Thermoregulatory Responses and Performance of Dairy Calves Fed Different Amounts of Colostrum. ANIMALS, v. 11, n. 3 MAR 2021. Web of Science Citations: 0.
MOURA SILVA, FERNANDA LAVINIA; MACHADO BITTAR, CARLA MARIS. Thermogenesis and some rearing strategies of dairy calves at low temperature - a review. JOURNAL OF APPLIED ANIMAL RESEARCH, v. 47, n. 1, p. 115-122, JAN 1 2019. Web of Science Citations: 0.

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