Behavior of lambs at different ages during brief periods of increased sensorial isolation from their mothers

摘要: Abstract To determine the behavior of different-aged lambs during short periods increased sensorial isolation from their mothers, 60 ewe-lamb pairs were randomly assigned to one following groups: "C," intact that remained with mothers; "A," restricted auditory capacity; "A+V," and visual capacities; "A+V+W," capacities plus separation mothers by an open wire mesh; "A+V+S," a solid wall. These treatments repeated in same animals when 3 (G ), 10 20 ) days old. The was recorded each 15-minute period, data examined using covariance analysis differences for measures over time. In general, after physical ewes (A+V+W A+V+S groups), emitted more vocalizations (3, 10, 20 days old) displayed frequent urination (3 days old), exploration objects (20 days conspecifics (3 escape attempts at age; or walking 3, lying down (10 old A+V+W 3 days A+V+S) comparison other treatments. G A+V, A+V+W, groups also greater values activity ( P lambs. it is concluded exhibition behavioral parameters degree isolation, particularly contact between dams restricted. As became older, they showed reactivity response isolation.