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Fig. 3. Discriminant analysis of nine variables selected by stepwise discriminant
analysis for L. humile queens from four colonies (CHH, COC, FOR,
RTP). Cuticular hydrocarbons of queens were sampled 24 h before introduction
and 2 weeks after adoption by queenless recipient FOR colonies (COC and FOR
queens) and queenless recipient RTP colonies (CHH and RTP queens) using a
non-destructive method. + marks the centroid of each group.