Fig. 1. Lamb productive performance parameters (mean and SD) as a function of the birth season (summer, autumn, winter, and spring). (BW): birth live weight; (DWGBW): average daily live weight gain from birth to weaning; (WW): weaning live weight; (DWGW-150): average daily live weight gain from weaning to 150 days of age. The number of observations (n) in each column is in parentheses. Different letters above the columns indicate differences according to Tukey or Bonferroni test (p < 0.05).