Free Access
Issue
Apidologie
Volume 22, Number 2, 1991
Page(s) 117 - 125
DOI https://doi.org/10.1051/apido:19910204
Apidologie 22 (1991) 117-125
DOI: 10.1051/apido:19910204

Incidence and effects of four parasites in natural populations of bumble bees in Switzerland

J.A. Shykoff and P. Schmid-Hempel

Zoologisches Institut der Universität Basel, Rheinsprung 9, CH-4051 Basel, Switzerland

Abstract - Field caught bumble bee (Bombus Latreille and Psithyrus Lepeletier) workers, males and queens were examined for the presence of 4 parasites. High prevalence of parasitization by conopid flies (20.2%) and the trypanosome Crithidia bombi (35.7%), moderate to low prevalence by the microsporidian Nosema bombi (9.0%) and the mite Bombacarus buchneri (3.6%) were found. Infestations by the 4 parasites were independent of one another but significant differences were found for bumble bee species and sex. Workers parasitized by C bombi were significantly less likely to forage for pollen and had developed ovaries in significantly more cases than did uninfested workers. Spring queens of B terrestris and B lucorum had lower prevalence of infestation by C bombi than was found in workers the previous summer.


Key words: Bombus / Psithyrus / parasitism / Crithidia / Nosema / Bombacarus / Conopidae

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.