Sexual dimorphism in the olfactory system of a solitary and a eusocial bee species

Streinzer, Martin; Kelber, Christina; Pfabigan, Sarah; Kleineidam, Christoph; Spaethe, Johannes

Sexual dimorphism in the olfactory system of a solitary and a eusocial bee species

Dateien

Streinzer_248732.pdfGröße: 402.44 KBDownloads: 633

Datum

2013

Autor:innen

Streinzer, Martin

Kelber, Christina

Pfabigan, Sarah

Kleineidam, Christoph

Spaethe, Johannes

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Comparative Neurology. 2013, 521(12), pp. 2742-2755. ISSN 0021-9967. eISSN 1096-9861. Available under: doi: 10.1002/cne.23312

Zusammenfassung

Sexually dimorphic sensory systems are common in Hymenoptera and are considered to result from sex-specific selection pressures. An extreme example of sensory dimorphism is found in the solitary bee tribe Eucerini. Males of long-horned bees bear antennae that exceed body length. This study investigated the pronounced sexual dimorphism of the peripheral olfactory system and its representation in higher brain centers of the species Eucera berlandi. Eucera males have elongated antennae, with 10 times more pore plates and three times more olfactory receptor neurons than females. The male antennal lobe (AL) comprises fewer glomeruli than the female AL (approximate to 100 vs. approximate to 130), of which four are male-specific macroglomeruli. No sex differences were found in the relative volume of the mushroom bodies, a higher order neuropil essential for learning and memory in Hymenoptera. Compared with the Western honeybee, the degree of sexual dimorphism in Eucera is more pronounced at the periphery. In contrast, sex differences in glomerular numbers are higher in the eusocial honeybee and a sexual dimorphism of the relative investment in mushroom body tissue is observed only in Apis. The observed differences between the eusocial and the solitary bee species may reflect differences in male-specific behavioral traits and associated selection pressures, which are discussed in brief.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

STREINZER, Martin, Christina KELBER, Sarah PFABIGAN, Christoph KLEINEIDAM, Johannes SPAETHE, 2013. Sexual dimorphism in the olfactory system of a solitary and a eusocial bee species. In: Journal of Comparative Neurology. 2013, 521(12), pp. 2742-2755. ISSN 0021-9967. eISSN 1096-9861. Available under: doi: 10.1002/cne.23312

BibTex

@article{Streinzer2013-08-15Sexua-24873,
  year={2013},
  doi={10.1002/cne.23312},
  title={Sexual dimorphism in the olfactory system of a solitary and a eusocial bee species},
  number={12},
  volume={521},
  issn={0021-9967},
  journal={Journal of Comparative Neurology},
  pages={2742--2755},
  author={Streinzer, Martin and Kelber, Christina and Pfabigan, Sarah and Kleineidam, Christoph and Spaethe, Johannes}
}

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    <dcterms:abstract xml:lang="eng">Sexually dimorphic sensory systems are common in Hymenoptera and are considered to result from sex-specific selection pressures. An extreme example of sensory dimorphism is found in the solitary bee tribe Eucerini. Males of long-horned bees bear antennae that exceed body length. This study investigated the pronounced sexual dimorphism of the peripheral olfactory system and its representation in higher brain centers of the species Eucera berlandi. Eucera males have elongated antennae, with 10 times more pore plates and three times more olfactory receptor neurons than females. The male antennal lobe (AL) comprises fewer glomeruli than the female AL (approximate to 100 vs. approximate to 130), of which four are male-specific macroglomeruli. No sex differences were found in the relative volume of the mushroom bodies, a higher order neuropil essential for learning and memory in Hymenoptera. Compared with the Western honeybee, the degree of sexual dimorphism in Eucera is more pronounced at the periphery. In contrast, sex differences in glomerular numbers are higher in the eusocial honeybee and a sexual dimorphism of the relative investment in mushroom body tissue is observed only in Apis. The observed differences between the eusocial and the solitary bee species may reflect differences in male-specific behavioral traits and associated selection pressures, which are discussed in brief.</dcterms:abstract>
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