Fig. 1: Different egg-laying performance of queens in A. mellifera and A. cerana.

a The newly laying queen in A. mellifera colony. b The newly laying queen in A. cerana colony. c The eggs laid daily of the newly laying queens of A. mellifera and A. cerana. d The body weight of the newly laying queens of A. mellifera and A. cerana. e The number of ovarioles in one ovary of A. mellifera and A. cerana. f The number of eggs laid per day per milligram of body weight. g The amount of eggs laid per ovariole per day in A. mellifera and A. cerana.