Open AccessGenetic variation in Irish pygmy shrews Sorex minutus (Soricomorpha: Soricidae): implications for colonization history
Author(s) -
MCDEVITT ALLAN D.,
RAMBAU RAMUGONDO V.,
O'BRIEN JOHN,
MCDEVITT C. DAMIEN,
HAYDEN THOMAS J.,
SEARLE JEREMY B.
Publication year - 2009
Publication title -
biological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.906
H-Index - 112
eISSN - 1095-8312
pISSN - 0024-4066
DOI - 10.1111/j.1095-8312.2009.01218.x
Subject(s) - shrew , biology , colonization , irish , sorex , population , zoology , range (aeronautics) , mitochondrial dna , microsatellite , genetic variation , evolutionary biology , ecology , genetics , demography , allele , gene , philosophy , linguistics , materials science , sociology , composite material
The status of the pygmy shrew ( Sorex minutus L.) as a native or an introduced species in Ireland has been subject to much debate. To examine this and other aspects of the colonization history of the Irish pygmy shrew, genetic variation was determined in 247 pygmy shrews collected throughout Ireland, using mitochondrial control region sequences and five polymorphic microsatellite loci. Genetic diversity was low for both types of marker. The median‐joining network for control region sequences was star‐like, suggesting that the colonization of Ireland involved a small number of founders and rapid population expansion thereafter; this was supported by other statistics. Molecular dating with both mitochondrial DNA and microsatellite data is consistent with a human introduction. This would have been several thousand years ago; a recent colonization within historical times can be ruled out. This is the first detailed population genetic study of the pygmy shrew anywhere in its range. © 2009 The Linnean Society of London, Biological Journal of the Linnean Society , 2009, 97 , 918–927.