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The aims of present study were to investigate the relationship between temperamentscore and cortisol and lactic acid levels of blood, as well as the effect of temperament onthe maternal ability traits (milk production, lamb preweaning gain) and the postweaninggrowth of lambs in Tsigai breed. The temperament of thirty-one Tsigai ewes was scored bythe temperament score test (behaviour of animals was assessed in a 5-score system (1: calm,5: nervous) while spending 30 s on the scale during weighing), in addition, the cortisol leveland the lactic acid concentration of blood were measured at weaning. The weaning weight,temperament, cortisol concentration, the pre- and the postweaning weight gain of lambswere also investigated in this study. The cortisol level and lactic acid concentration werehighly related to the temperament scores of ewes (rrank=0.79, P<0.001; rrank=0.53, P<0.01). Thecalmer ewes had a lower cortisol (1.79 nmol/l, P<0.001) and lactic acid (1.87 mmol/l, P<0.01)concentration compared to the results of nervous ewes (5.35 nmol/l, 3.11 mmol/l, resp.).It was statistically proven (P<0.01) that the calm ewes’ lambs had higher preweaning weightgain (244.0 g/day) and weaning weight (22.0 kg) than nervous animals (201.7 g/day, 18.1 kg).In addition, the calm ewes milked by hand produced more milk (52.4 l, P<0.05) thannervous ewes (46.1 l) in the milking period. Furthermore, the calm ewes’ lambs had lowertemperament score and cortisol concentration and better fattening performance than lambswere originated from nervous ewes

Effect of temperament of ewes on their maternal ability and their lambs’ postweaning traits in Tsigai breed