Abstract:
:The honey bee is threatened by biological agents and pesticides that can act in combination to induce synergistic effects on its physiology and lifespan. The synergistic effects of a parasite/pesticide combination have been demonstrated on workers and queens, but no studies have been performed on drones despite their essential contribution to colony sustainability by providing semen diversity and quality. The effects of the Nosema ceranae/fipronil combination on the life traits and physiology of mature drones were examined following exposure under semi-field conditions. The results showed that the microsporidia alone induced moderate and localized effects in the midgut, whereas fipronil alone induced moderate and generalized effects. The parasite/insecticide combination drastically affected both physiology and survival, exhibiting an important and significant generalized action that could jeopardize mating success. In terms of fertility, semen was strongly impacted regardless of stressor, suggesting that drone reproductive functions are very sensitive to stress factors. These findings suggest that drone health and fertility impairment might contribute to poorly mated queens, leading to the storage of poor quality semen and poor spermathecae diversity. Thus, the queens failures observed in recent years might result from the continuous exposure of drones to multiple environmental stressors.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Kairo G,Biron DG,Ben Abdelkader F,Bonnet M,Tchamitchian S,Cousin M,Dussaubat C,Benoit B,Kretzschmar A,Belzunces LP,Brunet JLdoi
10.1038/s41598-017-08380-5subject
Has Abstractpub_date
2017-08-17 00:00:00pages
8556issue
1issn
2045-2322pii
10.1038/s41598-017-08380-5journal_volume
7pub_type
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