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Title: The role of scent-marking in patchy and highly fragmented populations of the Cabrera ole (Microtus cabrerae Thomas, 1906)
Authors: Piteira Gomes, Luis Alexandre
Mira, António
Barata, Eduardo Nuno
Keywords: fragmented populations
Microtus cabrerae
patchy distribution
Issue Date: 2013
Publisher: BioOne
Citation: Piteira Gomes L. A., Pereira Mira A. P., Barata E. N. (2013). The role of scent-marking in patchy and highly fragmented populations of the Cabrera ole (Microtus cabrerae Thomas, 1906). Zoological Science 30: 248-254. (doi:10.2108/zsj.30.248)
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.
Type: article
Appears in Collections:BIO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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