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Sexual discrimination and attraction through scents in the water vole, Arvicola terrestris

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Abstract

In mammals, especially rodents, social behaviours, such as parenting, territoriality or mate attraction, are largely based on olfactory communication through chemosignals. These behaviours are mediated by species-specific chemosignals, including small organic molecules and proteins that are secreted in the urine or in various fluids from exocrine glands. Chemosignal detection is mainly ensured by olfactory neurons in two specific sensory organs, the vomeronasal organ (VNO) and the main olfactory epithelium (MOE). This study aimed to characterise the olfactory communication in the fossorial ecotype of the water voles, Arvicola terrestris. We first measured the olfactory investigation of urine and lateral scent gland secretions from conspecifics. Our results showed that water voles can discriminate the sex of conspecifics based on the smell of urine, and that urinary male odour is attractive for female voles. Then, we demonstrated the ability of the VNO and MOE to detect volatile organic compounds (VOCs) found in water vole secretions using live-cell calcium imaging in dissociated cells. Finally, we evaluated the attractiveness of two mixtures of VOCs from urine or lateral scent glands in the field during a cyclical outbreak of vole populations.

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Relevant data are available from the corresponding author.

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Acknowledgements

The authors thank Marie-Claire Blache of the Cellular Imagery Platform (PIC, UMR-PRC), the farmers for the access to their grasslands, and the housing facilities of Campus des Cézeaux (Université Clermont Auvergne), and of Unité RS2GP (INRAE VetAgro Sup).

Funding

This work was supported by the Ministère de l’Agriculture et de l’Alimentation, the DRAAF Auvergne-Rhône-Alpes as well as the Région Auvergne-Rhône-Alpes as a part of the “convention de Massif Central 2015–2020”.

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KP, A-CT, MN, DC, ET, and CM performed experiments; KP and A-CT analysed the data; KP wrote the first draft of the manuscript and designed the figures; PC, VL, A-CT, ET, AC, FS, JD, CLD, PNLM provided equipment, animal facility acces and helped conceiving the study; All authors reviewed the manuscript; MK supervised the study and acquired the funding.

Corresponding author

Correspondence to Matthieu Keller.

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The authors declare no competing interests.

Ethical statement

This study was carried out in accordance with European directive 2010/60/UE and was approved by ethical committees for animal experimentation (C2EA-02, project 21994-109 201907510411944 and C2EA-18, project 1857-2018110717044913). Trapping of water voles was allowed in the French department of Puy-de-Dôme by prefectural authorization 19–00100.

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Handling Editor: Wolfgang Rössler.

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359_2023_1671_MOESM1_ESM.eps

Supplementary material 1 Hematoxylin-eosin-stained sections of caudal nasal cavity of water voles from anterior (left) to posterior levels (right). *indicates the presence of an additional ethmoturbinate compared to mice and rats (EPS 1317.4 kb)

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Poissenot, K., Trouillet, AC., Trives, E. et al. Sexual discrimination and attraction through scents in the water vole, Arvicola terrestris. J Comp Physiol A (2023). https://doi.org/10.1007/s00359-023-01671-5

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  • DOI: https://doi.org/10.1007/s00359-023-01671-5

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