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Meadow voles differentiate between scents of different sources

In: Behaviour
Authors:
Sarah S. Garris Department of Biological Science, University of Memphis, Ellington Hall, Memphis TN 38152, USA

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Lyndsey M. Pierson Department of Biological Science, University of Memphis, Ellington Hall, Memphis TN 38152, USA
Department of Biology, Christian Brothers University, Cooper-Wilson Center, Memphis, TN 38104, USA

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https://orcid.org/0000-0001-7643-2764
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Michael H. Ferkin Department of Biological Science, University of Memphis, Ellington Hall, Memphis TN 38152, USA

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Abstract

Scent marks are an important means of transmitting information between rodents, and they can be produced from several body sources. Previous studies have shown that scents from multiple sources can convey the same information; female meadow voles, for example, have three scent sources that communicate sex. However, possessing three separate sources that convey the same information is likely costly due to the metabolic energy required to produce these signals and the increased chance that eavesdropping individuals may intercept information present in these signals. In this study, we investigated if these scent sources could communicate other information, in addition to scent donor sex, by determining if male meadow voles could distinguish scent marks taken from different sources of a single female scent donor. This was accomplished with a habituation-test method, that allowed us to compare how male meadow voles differently investigate scent from a familiar and novel source of a female scent donor. Male meadow voles could distinguish between faeces and urine scent marks of a female, but could only distinguish mouth from urine and faeces scent marks when first familiarized with mouth scent marks. Our findings suggest that mouth, urine, and faeces scent marks of female meadow voles produce both redundant and distinct information. The overlap in information between scent marks produced from separate sources may be needed to provide social context, which allows receiving individuals to accurately weigh the tradeoffs associated with responding to an olfactory cue. While this overlap in information remains costly, this cost may be minimized by the different fade-out times of scent marks from distinct body sources, which may limit the amount of time information in a scent mark is available to a time period where this information is socially relevant.

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