Summary
During laboratory experiments, two categories of prey-foraging workers were found inEctatomma ruidum: stingers and transporters. When numerous live drosophila were offered to the ants, one group of hunters specialized in killing the prey and another in transporting simultaneously the dead drosophila to the nest. Sometimes, there was a transfer of prey by a stinger towards a transporter, after an active soliciting of the transporter by antennation or by using the forelegs. We found high positive correlations between the colony size and the number of ants in each subcaste. A negative correlation existed between the colony size and the proportion of hunters. However, the proportion of workers in the two behavioral subcastes of hunters was stable in spite of differences in colony size. The phylogenetic interest of this type of cooperative predation is discussed.
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Schatz, B., Lachaud, J.P. & Beugnon, G. Polyethism within hunters of the ponerine ant,Ectatomma ruidum Roger (Formicidae, Ponerinae). Ins. Soc 43, 111–118 (1996). https://doi.org/10.1007/BF01242563
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DOI: https://doi.org/10.1007/BF01242563