Graphs illustrating: (A) the changing concentrations of DA in the brain, thoracic ganglia, and abdominal ganglia; (B) the changing concentrations of DA in the ovaries.
The concentration is expressed as nmol/mg of protein in the organ extract. Numbers are means ± SEM. Asterisks indicate significant differences at P < 0.05 in an analysis of
variance. B-I to IV are the concentration of DA in brain at ovarian stages I–IV. T-I to IV are the concentration of DA in thoracic ganglia at ovarian stages I–IV. A-I to IV are the
concentration of DA in abdominal ganglia at ovarian stages I–IV. O-I to IV are the concentration of DA in ovarian stages I–IV.