Table 2. Categories to which dyads of R. roxellana were assigned according to their membership in different ‘trader’ classes.

Dyads Categories	A	B
MF	Males	Females
NM	Non-mother	Mother
NN	Non-mother	Non-mother
HL	High-ranking females	Low-ranking females

Mother: females with new born infant.

Non-mother: females with no new infant; roles were assigned randomly but consistently within dyads.