Does coping style affect behavioral responses and growth performance of lambs weaned at different ages

摘要: Abstract The objective of this study was to determine the relationships between coping style (CS), and physiological, behavioral characteristics growth performance lambs weaned at different ages. Male Karakas (n = 75, mean age = 30 d) obtained from a breeder farm were subjected 3-minute open field test. Of 75 classified by hierarchical clustering on principal components’ scores test behaviors, 40 assigned 1 2 groups as proactive (Pro, n = 20) or reactive (Rea, n = 20). Pro (n = 10) Rea selected randomly 45 d (D45). remaining 20 (10 Pro, 10 Rea) (D75). Lambs (Pro n = 5, n = 5) each pen (n = 10). Blood samples taken just before minutes after start weaning (on 0, 1, 3, 5, 7 weaning) measure serum cortisol, glucose, lactate dehydrogenase, creatine kinase, total protein, triglyceride concentrations. There no significant effect CS blood parameters measured both in that (P > 0.05). had live weight (LW) average daily gain (ADWG) positive partial correlation aggressive behaviors glucose