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Rinderer, De Guzman, et al provide evidence that T. mites do not survive on migrating swarms.
T. clareae cannot survive more than 3 days on adult bees of A. dorsata (Rinderer et al., 1994), thus the origin of infestations in colonies that have recently undergone migration is as yet unknown. Presumably populations of T. clareae gradually build up in new A dorsata nests after re-infestation. To test this hypothesis, we evaluated Tropilaelaps infestations in new and established nests of A dorsata in Samut Songkhram, Thailand. T. clareae can spread via reproductive swarms, but probably not, as we have shown, in migratory swarms.
We confirmed that T. clareae populations gradually build up in new A. dorsata nests after re-infestation. Most often uninfested colonies must acquire T. clareae from other Apis species or nests of A. dorsata present in the area. In Malaysia, A. cerana adult bees have been observed to rob A. dorsata colonies (Koeniger et a/. 2002). Thus, foraging of different bee species in the same flower or robbing must be considered as a potential source of T. clareae infestation for uninfested colonies.
Absence of Tropilaelaps infestation from recent swarms of Apis dorsata in Thailand. B Kavinseksan, S Wongsiri, L I De Guzman & T E Rinderer
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