Summary
Patterns of colonization by queens and incipient nest survival of the leaf-cutting antsAcromyrmex niger andAcromyrmex balzani were studied by means of belt transects and individually marked incipient nests. No relation was found between colony density and the number of colonization attempts. Both species are not claustral, and high rates of queen mortality were attributed to conspecific executions and predation. Of other discernable mortality factors, failure of fungal garden establishment was the most important. Only 34 of 296A. balzani and 13 of 154A. niger marked colonies were alive at the end of one year. These figures are higher than those reported for species ofAtta. These results are contrasted with those of claustral-foundingAtta species. Small colonies are occasionally raided by larger colonies which robbed brood.
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Fowler, H.G. Patterns of colonization and incipient nest survival inAcromyrmex niger andAcromyrmex balzani (Hymenoptera: Formicidae). Ins. Soc 39, 347–350 (1992). https://doi.org/10.1007/BF01323955
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DOI: https://doi.org/10.1007/BF01323955