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

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

doi:10.1002/cne.23312

Cited by 44 publications

(54 citation statements)

References 70 publications

(127 reference statements)

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“…Our results support the hypothesis that non-parasitic species having sexual dimorphisms present differences in the abundance of multiporous sensilla (Esslen and Kaissling 1976;Ågren 1977, 1978Galvani et al 2012;Streinzer et al 2013;Ravaiano et al 2014 Fig. 8 Plots of sample scores extracted by the principal components I and II.…”

Section: Discussionsupporting

confidence: 85%

“…In our study, the number of sPa was always higher in males, but in most of the species, the differences between males and females were lower than those reported for A. mellifera (Brockmann & Brückner 2001) and eucerines (Streinzer et al 2013). However, males also possessed a high number of stA.…”

contrasting

confidence: 64%

“…Abbreviations of the species names can be found in ESM: Table SI. Streinzer et al 2013). On the contrary, in cleptoparasitic species, such a difference in the distribution of sensilla is very low or nonexistent.…”

Section: Discussionmentioning

confidence: 96%

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Antennal sensilla of cleptoparasitic and non-parasitic bees in two subfamilies of Apidae

et al. 2017

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-In bees, most of the comparative studies linking the sensory system and behavior were performed in social species. Here, we describe the morphology of antennal sensilla in solitary and cleptoparasitic bees of Apinae and Nomadinae. The external and internal structure of sensilla and setae as well as their distribution in flagella were studied in detail in two different host-cleptoparasitic associations. In addition, taking into account the presence of pores, the distribution of sensilla was compared in females and males of 39 species of these subfamilies. It was found that males of non-parasitic bees showed a higher number of multiporous sensilla. Females had more uniporous and nonporous sensilla than males. Cleptoparasitic bees showed a low diversity in types of sensilla and no sexual dimorphism in number. The pattern of sensilla in males and their cleptoparasitic females was discussed in the context of their ecological roles.antennal morphology / sensilla ultrastructure / olfaction / dimorphism

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Section: Discussionsupporting

confidence: 85%

contrasting

confidence: 64%

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Antennal sensilla of cleptoparasitic and non-parasitic bees in two subfamilies of Apidae

et al. 2017

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“…However, the temporal resolution of the imaging process itself is rather limited. Optical acquisition systems usually use CCD-imaging with a temporal resolution of [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] , although 2-PhotonImaging might be able to acquire faster sequences 68 . However, increasing sampling rate always goes along with a loss in spatial resolution.…”

Section: Discussionmentioning

confidence: 99%

“…In honeybees about 80,000 receptor neurons 9 situated in sensillae along the antennae 10,11 translate the environmental odor stimulus into a neuronal signal. Axons from olfactory receptor neurons innervate the antennal lobe (AL), which has a glomerular organization comparable to the vertebrate olfactory bulb.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Long-term Recordings at Two Neuronal Processing Stages in Behaving Honeybees

Brill

Reuter

Rößler

et al. 2014

JoVE

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In both mammals and insects neuronal information is processed in different higher and lower order brain centers. These centers are coupled via convergent and divergent anatomical connections including feed forward and feedback wiring. Furthermore, information of the same origin is partially sent via parallel pathways to different and sometimes into the same brain areas. To understand the evolutionary benefits as well as the computational advantages of these wiring strategies and especially their temporal dependencies on each other, it is necessary to have simultaneous access to single neurons of different tracts or neuropiles in the same preparation at high temporal resolution. Here we concentrate on honeybees by demonstrating a unique extracellular long term access to record multi unit activity at two subsequent neuropiles 1 , the antennal lobe (AL), the first olfactory processing stage and the mushroom body (MB), a higher order integration center involved in learning and memory formation, or two parallel neuronal tracts 2 connecting the AL with the MB. The latter was chosen as an example and will be described in full. In the supporting video the construction and permanent insertion of flexible multi channel wire electrodes is demonstrated. Pairwise differential amplification of the micro wire electrode channels drastically reduces the noise and verifies that the source of the signal is closely related to the position of the electrode tip. The mechanical flexibility of the used wire electrodes allows stable invasive long term recordings over many hours up to days, which is a clear advantage compared to conventional extra and intracellular in vivo recording techniques.

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Brain composition in Godyris zavaleta, a diurnal butterfly, Reflects an increased reliance on olfactory information

Montgomery

Ott

2014

J of Comparative Neurology

136

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Interspecific comparisons of brain structure can inform our functional understanding of brain regions, identify adaptations to species-specific ecologies, and explore what constrains adaptive changes in brain structure, and coevolution between functionally related structures. The value of such comparisons is enhanced when the species considered have known ecological differences. The Lepidoptera have long been a favored model in evolutionary biology, but to date descriptions of brain anatomy have largely focused on a few commonly used neurobiological model species. We describe the brain of Godyris zavaleta (Ithomiinae), a member of a subfamily of Neotropical butterflies with enhanced reliance on olfactory information. We demonstrate for the first time the presence of sexually dimorphic glomeruli within a distinct macroglomerular complex (MGC) in the antennal lobe of a diurnal butterfly. This presents a striking convergence with the well-known moth MGC, prompting a discussion of the potential mechanisms behind the independent evolution of specialized glomeruli. Interspecific analyses across four Lepidoptera further show that the relative size of sensory neuropils closely mirror interspecific variation in sensory ecology, with G. zavaleta displaying levels of sensory investment intermediate between the diurnal monarch butterfly (Danaus plexippus), which invests heavily in visual neuropil, and night-flying moths, which invest more in olfactory neuropil. We identify several traits that distinguish butterflies from moths, and several that distinguish D. plexippus and G. zavaleta. Our results illustrate that ecological selection pressures mold the structure of invertebrate brains, and exemplify how comparative analyses across ecologically divergent species can illuminate the functional significance of variation in brain structure.

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

Cited by 44 publications

References 70 publications

Antennal sensilla of cleptoparasitic and non-parasitic bees in two subfamilies of Apidae

Antennal sensilla of cleptoparasitic and non-parasitic bees in two subfamilies of Apidae

Simultaneous Long-term Recordings at Two Neuronal Processing Stages in Behaving Honeybees

Brain composition in Godyris zavaleta, a diurnal butterfly, Reflects an increased reliance on olfactory information

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