Natural selection of Varroa jacobsoni explains the differential reproductive strategies in colonies of Apis cerana and Apis mellifera View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1999

AUTHORS

Willem J. Boot , Johan N. M. Calis , Joop Beetsma , Dong Minh Hai , Nguyen Kim Lan , Tran Van Toan , Le Quang Trung , Nguyen Hung Minh

ABSTRACT

In colonies of European Apis mellifera, Varroa jacobsoni reproduces both in drone and in worker cells. In colonies of its original Asian host, A. cerana, the mites invade both drone and worker brood cells, but reproduce only in drone cells. Absence of reproduction in worker cells is probably crucial for the tolerance of A. cerana towards V. jacobsoni, because it implies that the mite population can only grow during periods in which drones are reared. To test if non-reproduction of V. jacobsoni in worker brood of A. cerana is due to a trait of the mites or of the honey bee species, mites from bees in A. mellifera colonies were artificially introduced into A. cerana worker brood and vice versa. About 80% of the mites from A. mellifera colonies reproduced, in naturally infested worker cells as well as when introduced into worker cells of A. mellifera and A. cerana. Conversely, only 10% of the mites from A. cerana colonies reproduced, both in naturally infested worker cells of A. cerana and when introduced into worker cells of A. mellifera. Hence, absence of reproduction in worker cells is due to a trait of the mites. Additional experiments showed that A. cerana bees removed 84% of the worker brood that was artificially infested with mites from A. mellifera colonies. Brood removal started two days after artificial infestation, which suggests that the bees responded to behaviour of the mites. Since removal behaviour of the bees will have a large impact on fitness of the mites, it probably plays an important role in selection for differential reproductive strategies. Our findings have large implications for selection programmes to breed less-susceptible bee strains. If differences in non-reproduction are mite-specific, we should not only look for non-reproduction as such, but for colonies in which non-reproduction in worker cells is selected. Hence, in selection programmes fitness of mites that reproduce in both drone and worker cells should be compared to fitness of mites that reproduce only in drone cells. More... »

PAGES

349-357

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-94-017-1343-6_24

DOI

http://dx.doi.org/10.1007/978-94-017-1343-6_24

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1002074429


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186 rdf:type schema:Organization
 




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