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Experience-dependent choices ensure species-specific fragrance accumulation in male orchid bees

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A Publisher’s Erratum to this article was published on 21 December 2005

A Publisher’s Erratum to this article was published on 21 December 2005

Abstract

Male neotropical orchid bees (Euglossini) collect volatile chemicals from orchid flowers and other sources and store them in hind leg cavities. The accumulated fragrance bouquets are later emitted at mating sites. Although most other insects synthesize pheromone blends de novo, specific euglossine perfumes are derived from active choices in a changing fragrance market. Male bees of three species of Euglossa possessed distinctive fragrance phenotypes showing little variation by locality and habitat in mainland Central America. In cage experiments, fragrance choice by male Euglossa imperialis was influenced markedly by a bee's collection history. Collection of a given chemical strongly reduced its attractiveness on subsequent occasions, an effect that was retained over days. Experimentally adding the chemicals directly to bee hind legs produced no effect. We conclude that bees learn and remember chemicals they collect. Innate odor preferences, memory and the avoidance of overcollecting by negative feedback may be the primary mechanisms that ensure unique blends of pheromone analogs in these tropical forest bees.

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Acknowledgements

Work and manuscript benefited substantially from discussions held within the Sensory Ecology Group seminar in Düsseldorf. Randolf Menzel, Bertram Gerber, and an anonymous reviewer provided insights concerning learning mechanisms. The chemical–analytical part of the study was substantiated by Roman Kaiser, who cross-checked reference samples and identified critical fragrance compounds. Günter Gerlach provided chemical baits and access to his wealth of baiting data. Georg Pohland and Peter Mullen helped to collect bee samples in Costa Rica and Panama. The study was sponsored by DFG grant EL 249/2-1

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Authors and Affiliations

  1. Department of Neurobiology, Sensory Ecology Group, University of Düsseldorf, Universitätstr. 1, 40225, Düsseldorf, Germany

    Thomas Eltz & Klaus Lunau

  2. Smithsonian Tropical Research Institute, P.O. Box 2072, Balboa, Panama

    David W. Roubik

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  1. Thomas Eltz
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  2. David W. Roubik
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  3. Klaus Lunau
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Correspondence to Thomas Eltz.

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Communicated by R.F.A. Moritz

An erratum to this article can be found at http://dx.doi.org/10.1007/s00265-005-0093-9

Electronic supplementary material

S1

Incidence, average relative abundance, and contribution to within-species similarity of fragrance components in hind-leg extracts of three species of Euglossa in mainland Panama (pooled across localities 2, 3, and 4).

S2

Incidence, average relative abundance, and contribution to within-species similarity of fragrance components in hind-leg extracts of Euglossa tridentata at six localities in Panama and Costa Rica.

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Eltz, T., Roubik, D.W. & Lunau, K. Experience-dependent choices ensure species-specific fragrance accumulation in male orchid bees. Behav Ecol Sociobiol 59, 149–156 (2005). https://doi.org/10.1007/s00265-005-0021-z

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