SHORT NOTE
Recent island colonization by an introduced shrew in the western Mediterranean
 
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1
University of the Balearic Islands
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Institut Mediterrani d'Estudis Avançats (CSIC-UIB)
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Consorci per a la Recuperació de la Fauna de les Illes Balears (COFIB)
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The Albufera International Biodiversity Group (TAIB)
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Estación Biológica de Doñana (EDB-CSIC)
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Institut de Recerca de Biodiversitat, Universitat de Barcelona
Online publish date: 2018-08-07
 
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ABSTRACT:
Insular ecosystems are sensitive to alien invasive species. The Balearic Islands have been colonized by a large list of invasive species, in most cases due to human activity. White-toothed shrews have been historically recorded in this archipelago and to date four different species have been found. In this study we focus on the white-toothed pygmy shrew (Suncus etruscus) at the island of Mallorca, assessing its current status and identifying both its genetic variation and geographic structure. During the last 50 years this species has colonized a large proportion of the island. Haplotype network analyses support the hypothesis of a unique and recent colonization event from a single but unknown source population. Available genetic information suggests the populations from northeast Iberian Peninsula (Catalonia) and southwest France (Camarge) as the most plausible source of the lineage found in Mallorca. The recent and extensive distribution of S. etruscus on this island is characteristic of a fast growing population at an invasive colonization phase, indicating that it has found in Mallorca suitable ecological conditions to thrive.
CORRESPONDING AUTHOR:
Samuel Pinya   
University of the Balearic Islands, Ctra. Valldemossa, km 7.5, Edifici Guillem Colom Casasnoves, 07122 Palma, Spain
eISSN:1825-5272
ISSN:0394-1914