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b-allele pattern question

Posted by mdunford on 25 Mar 2008 at 06:43 GMT

These results suggest that while polygyny seems to be concentrated in northern Argentina and southeastern Brazil, it may occur at some frequency through much of the native range of S. invicta
http://plosone.org/article/info:doi/10.1371/journal.pone.0001088#article1.body1.sec2.sec8.p1

Are there any indications that some of the b-alleles that were found at sites outside the Argentina/Paraguay/Brazil area (such as Coxim) are the product of human mediated rather than natural dispersal?