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[Anemia of male rearing calves. 2. Duration of anemia].

From 203 male rearing calves in a longitudinal study during the first rearing period in a rearing farm the time could be determined in which the hemoglobin quota, the hematocrit resp. the average corpuscular hemoglobin concentration were lower than 10,5 g/dl, 33% resp. 30.5 g Hb/dl erythrocytes. The average duration of anaemia was 45, 29.5 resp. 44 days of the total of 56 keeping days in this rearing range (80.4%, 52.7% resp. 78.6% of the keeping period). During this rearing period 89.2%, 71.4% resp. 90.6% of all animals were anaemic for a shorter or longer time. With 29.8%, 26.2% resp. 29.9% of the anaemic calves the anaemic phase exceeded 56 days.