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Identity and function of scent marks deposited by foraging bumblebees

Goulson, D., Stout, J. C., Langley, J. and Hughes, W. O. H. (2000) Identity and function of scent marks deposited by foraging bumblebees Journal of Chemical Ecology, 26, (12), pp. 2897-2911. (doi:10.1023/A:1026406330348).

Record type: Article


Foraging bumblebees can detect scents left on flowers by previous bumblebee visitors and hence avoid flowers that have been depleted of nectar. Tarsal secretions are probably responsible for this repellent effect. The chemical components of the tarsal glands were analyzed by combined gas chromatography-mass spectrometry for three species of bumblebee. Bombus terrestris, B. lapidarius, and B. pascuorum. The hydrocarbons identified were similar for each species. although there were interspecific differences in the relative amounts of each compound present. The tarsal extracts of all three species comprised complex mixtures of long-chain alkanes and alkenes with between 21 and 29 carbon atoms. When B. terrestris tarsal extracts were applied to flowers and offered to foraging bumblebees of the three species. each exhibited a similar response; concentrated solutions produced a repellent effect, which decreased as the concentration declined. We bioassayed synthetic tricosane (one of the compounds found in the tarsal extracts) at a range of doses to determine whether it gave a similar response. Doses greater than or equal to 10(-12) ng/flower resulted in rejection by foraging B. lapidarius. Only when less than or equal to 10(-14) ng was applied did the repellent effect fade. We bioassayed four other synthetic compounds found in tarsal extracts and a mixture of all five compounds to determine which were important in inducing a repellent effect in B. lapidarius workers. All induced repellency but the strength of the response varied: heneicosane was most repellent while tricosene was least repellent. These findings are discussed in relation to previous studies that found that tarsal scent marks were attractive rather than repellent.

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Published date: 1 December 2000
Keywords: bombus, apidae, hymenoptera, tarsal gland secretions, foraging behavior, repellency, n-heneicosane, n-tricosane, (z)-9-tricosene, n-pentacosane, n-heptacosaneapis-mellifera, cuticular hydrocarbons, gland secretion, flowers, nectar, bees, honeybees, behavior, movement, choice


Local EPrints ID: 19006
ISSN: 0098-0331
PURE UUID: ba7c7027-38ca-41a7-a834-b583dae06053

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Date deposited: 18 Jan 2006
Last modified: 17 Jul 2017 16:34

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Author: D. Goulson
Author: J. C. Stout
Author: J. Langley
Author: W. O. H. Hughes

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