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1 April 2013 The Role of Scent-Marking in Patchy and Highly Fragmented Populations of the Cabrera Vole (Microtus cabrerae Thomas, 1906)
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Abstract

Rodent scent-marking is often used for territorial defence and self-advertisement, and both functions often entail the continuous scent-marking of a large area with high costs. In species with highly-fragmented populations and low density, in which the likelihood of social encounters is low, the costs of continuous scent-marking might exceed the associated fitness benefits; therefore, less intensive scent-marking only to signal presence to the opposite sex may be used. This hypothesis was tested in captivity with the Cabrera vole, a species with highly fragmented and low-density populations. Firstly, to assess the unknown scent-marking behaviour of the Cabrera voles, we conducted an assay wherein voles could scent-mark a clean substrate. Both sexes marked with urine and faeces, but never with anogenital secretions, and the amount of scent-marks was not different between sexes. In the subsequent assay, voles of each sex were given the choice of scent-mark on clean substrates or on substrates previously scent-marked by males or females. Both sexes marked with urine a larger area on substrates pre-marked by the opposite sex than on substrates pre-marked by the same-sex and clean substrates; however, no differences were found in the frequency of fecal boli deposited on the three types of substrate, and no anogenital secretions were found. The clear preference of receivers to scent-mark with urine the substrate pre-marked by the opposite sex strongly suggests that Cabrera voles use urine scent-marking for inter-sexual communication, probably to increase mate-finding likelihood, rather than for territorial defense and/or self-advertisement.

© 2013 Zoological Society of Japan
Luis Alexandre Piteira Gomes, António Paulo Pereira Mira, and Eduardo Nuno Barata "The Role of Scent-Marking in Patchy and Highly Fragmented Populations of the Cabrera Vole (Microtus cabrerae Thomas, 1906)," Zoological Science 30(4), 248-254, (1 April 2013). https://doi.org/10.2108/zsj.30.248
Received: 2 March 2012; Accepted: 1 October 2012; Published: 1 April 2013
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