The 2005 ESA Annual Meeting and Exhibition
December 15-18, 2005
Ft. Lauderdale, FL

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Saturday, December 17, 2005 - 3:06 PM
0947

Viability of queen-destined eggs shifts with reproductive status in socially hybridogenetic harvester ants

Sara Helms Cahan, scahan@uvm.edu, University of Vermont, Department of Biology, 109 Carrigan Dr, Burlington, VT

Socially hybridogenetic ants produce queen and worker progeny from eggs sired by genetically different males. I investigated the relationship between viability of queen-destined and worker-destined eggs and colony size and reproductive status of laboratory colonies. Although worker-destined eggs developed under all conditions, queen-destined eggs displayed very low viability when the colony was non-reproductive regardless of colony size, but significantly higher viability when queens were actively being produced. The early stage of termination of these eggs may minimize the energetic drain on colony growth, and suggests that egg development is influenced by a maternal cue to colony reproductive status.


Species 1: Hymenoptera Formicidae Pogonomyrmex barbatus
Keywords: genetic caste determination