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  • 1
    Electronic Resource
    Electronic Resource
    Polygyny via unrelated queens indicated by mitochondrial DNA variation in the Australian meat ant Iridomyrmex purpureus (1997)
    Springer
    Insectes sociaux 44 (1997), S. 7-14 
    Details
    ISSN: 1420-9098
    Keywords: Key words: Mitochondrial DNA, restriction site polymorphism, meat ants, Iridomyrmex purpureus, polygyny.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: The Australian meat ant Iridomyrmex purpureus is known from observations and allozyme surveys to have a high proportion of mature colonies polygynous, but very few incipient ones. Sixteen colonies in the vicinity of Maryborough, Victoria, revealed four mtDNA restriction site haplotypes. One of these nests presented two different haplotypes; given the haplotype frequencies, this result suggests that a high proportion of mature nests contain unrelated queens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000400050018
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  • 2
    Electronic Resource
    Electronic Resource
    Microsatellite analysis of gamergate relatedness of the queenless ponerine ant Rhytidoponera sp. 12 (2000)
    Springer
    Insectes sociaux 47 (2000), S. 188-192 
    Details
    ISSN: 1420-9098
    Keywords: Key words: Queenless ants, relatedness, microsatellites, gamergates, Rhytidoponera sp. 12.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: Rhytidoponera sp. 12 is a queenless ponerine ant. Reproduction is only by several to many mated workers (gamergates). Until now there has been no information on the variation in relatedness between colonies of such ants. Here we use data from five highly polymorphic microsatellite markers to determine the intracolony relatednesses of cohabiting gamergates (bgg) collected from five colonies. Contrary to expectations from previous work, cohabiting gamergates are highly related, and colonies were provisionally classified into 2 types based on bgg: Type 1 colonies have full sister gamergates, while in Type 2 colonies gamergates are not full sisters, although still significantly related. The high relatedness observed between nestmate gamergates despite the low relatedness expected on theoretical grounds, the observed low relatedness between unmated nestmates, and the genetic signatures of migration between colonies indicates frequent bottlenecking, such as from colony founding events or catastrophic reductions in the numbers of gamergates per colony.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00001700
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  • 3
    Electronic Resource
    Electronic Resource
    Nestmate interactions and egg-laying behaviour in the queenless ponerine ant Rhytidoponera sp. 12 (2000)
    Springer
    Insectes sociaux 47 (2000), S. 133-140 
    Details
    ISSN: 1420-9098
    Keywords: Key words:Rhytidoponera, ants, gamergate, trophic eggs, nestmate interactions.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary: Rhytidoponera sp. 12 is a polygynous Australian arid-zone queenless ponerine ant with morphologically identical mated workers (gamergates) and unmated workers. Discriminating gamergates from virgin workers in R. sp. 12 is therefore difficult. All females have functional ovaries and spermatheca. The ability of unmated workers to lay trophic eggs has not been reported. In four R. sp. 12 colonies we found that gamergates have tough reddish-brown cuticle differing from that of the dark brown unmated workers. Gamergates were successfully identified by combining this observable morphological difference with previously described behavioural traits thus eliminating the need of identification through dissection. In a laboratory-kept colony gamergates showed mutual tolerance. Egg-shuffling behaviour by gamergates was observed. A high proportion of unmated workers laid trophic eggs that were either cannibalised or shared between nestmates; larvae were observed to feed exclusively on these trophic eggs. Eggs laid by gamergates were sometimes eaten, although the majority of these were deposited onto egg piles carried by unmated workers. Oophagy of viable eggs by gamergates may represent a form of dominance behaviour or, together with egg-shuffling, a behaviour to resist manipulation by less fecund gamergates. Removing gamergates from three colonies led to oocyte development in some unmated workers, indicating that ovarian development in virgin workers may be reduced in the presence of gamergates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00001691
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