Table 1. Contents of biogenic amines and their N-acetylated substance in the ant brain.

	Virgin queen	Mated queen	Worker
	(N = 10)	(N = 10)	(N = 10)
DA	4.73±0.22	2.43±0.20*	5.02±0.31
Nac-DA	1.69±0.29	1.14±0.10*	1.55±0.21
TA	0.41±0.04	1.17±0.22*	0.45±0.05
Nac-TA	1.10±0.11	1.03±0.11	0.52±0.02
OA	1.50±0.20	0.40±0.03*	1.34±0.10
Nac-OA	1.00±0.17	1.01±0.12	0.18±0.03
5HT	1.71±0.13	1.39±0.07*	1.89±0.07
Nac-5HT	0.21±0.02	1.12±0.14*	0.28±0.04

The levels of brain biogenic amines were compared between virgin and mated queens and tested using Student’s t-test (*P<0.05). As a reference, the contents of biogenic amine levels in foraging workers that interact with nest mates were measured [67].

(Mean ± SEM, pmol/brain).