Mean levels of aggression (± standard error) displayed by ants from each individual colony toward nestmates treated with synthetic hydrocarbons (grey and black bars) or controls (open bars). Color scheme follows that described for Figure 3. LP = Los Peñasquitos, LS = Lake Skinner, LH = Lake Hodges, CW = Cottonwood, SW = Sweetwater Reservoir.
Brandt et al. BMC Biology 2009 7:71 doi:10.1186/1741-7007-7-71