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Some social insects produce workers of variable size and/or shape. One hypothesis to explain such variation is that it increases colony efficiency in performing diverse tasks, with greater efficiency leading to greater colony-level fitness. Using the granivorous ant Messor pergandei, which produces ...

Waser, N. M.
Journal of Insect Behavior, 1998, 11, 3, pp 451-462

Maintenance of geographical variation in mode of colony foundation was investigated in Messor pergandei in the field in California and Arizona during February-March 1995. The results of the survey confirmed the existence of large-scale geographical variation in colony founding. The range of M....

Cahan, S.; Helms, K. R.; Rissing, S. W.
Animal Behaviour, 1998, 55, 6, pp 1583-1594