Haematological variables, blood oxygen capacity, acid-base balance and heart rate in monozygotic twin calves. Effects of life age and husbandry systemOriginal Title (non-English) Hamatologische Variablen, Sauerstoffkapazitat des Blutes, Saure-Basen-Status und Herzfrequenz monozygoter Zwillingskalber. Effekte durch Alter und Haltungsform [German]

摘要

Group housed (MZ-G) and single stalled (MZ-E) monozygotic twin calves and control calves (VK-G and VK-E) were examined at 15, 30, 60 and 90 days of life age (testing points U1 to U4). Body weight and blood measures (Hb, Hct, MCHC, O(2)CAP, O(2)SAT, O2CONT, COHb, MetHb, plasma iron, lactate, acid-base balance) and heart rate were determined. Effects of testing point were predominantly significant in MZ-G and MZ-E and more pronounced in MZ-G than in MZ-E. Significant effects of animal group on blood measures and heart rate could be established with different frequencies at testing point U 1 to U4. At some testing points life age of calves had a significant effect on the variables and significant correlations with these variables as well. Differences of mean values of the variables between MZ-G and MZ-E, between VK-G and MZ-E and between VK-G and VK-E were more frequent and stronger than those between MZ-E and VK-E and those between MZ-G and VK-G as well.