Many people these days are promoting "locally adapted" bees and the term "acclimatization" has been heard in some circles. In his comprehensive book "Biogeography and Taxonomy of Honeybees" Ruttner states:

> European strains have retained their low swarming rate in tropical S America through centuries, although this renders them completely inferior in fitness, as was shown when the Africanized bee appeared as competitor. Transferred colonies usually maintain all their inherited behavioral inventory and all reports on "acclimatization" refer to nothing else but hybridization. 

PLB

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