Coexistence of two Sympatric Ant Species, Pheidole pallidula and Tetramorium semilaeve (Hymenoptera: Formicidae)
Retana, Javier; Cerda Xim, ; Espadaler Xavier,
Pheidole pallidula (Nylander 1848) and Tetramorium semilaeve Andre 1883 are 2 sympatric ant species that coexist in the same habitat in many places of their widely overlapping distribution. These are their main ecological features: They are 2 small-sized ants that collect animal and plant remains in a similar proportion and that have a similar prey-size range. When they find big prey, they follow the same mass recruitment mechanism, bringing a large number of workers to the baits and defending them against other ant species, by means of their aggressive behaviour. Both are crepuscular and nocturnal species and concur outside the nests during the greater part of their activity period, although their peaks of activity are dissimilar in time. Coexistence of these 2 ecologically similar species is discussed.