Search results for "Intergradation"
showing 2 items of 2 documents
The fire salamander, Salamandra salamandra L., in central Europe: subspecies distribution and intergradation
1992
AbstractAllozyme electrophoresis of 14 loci provided information on the distribution of the two central European subspecies of the fire salamander, Salamandra salamandra salamandra (dotted taxon) and S.s.terrestris (striped taxon), along an east-west-transect in Germany. 2183 larvae from 48 populations situated in 14 mountain ranges were studies. A broad (about 140 km wide) zone of intergradition between the two forms is described, ranging from the Hunsrück Mountains in the west to the Spessart in the east. Within this hybrid zone the populations are panmictic. Focussing on the Rhenish Slate Mountains, the western border of the hybrid zone is described in detail. A comparison between allozy…
Differences in gene flow in a twofold secondary contact zone of pond turtles in southern Italy (Testudines: Emydidae:Emys orbicularis galloitalica,E.…
2015
Using virtually range-wide sampling for three pond turtle taxa (Emys orbicularis galloitalica, E. o. hellenica, E. trinacris), we analyse gene flow across their southern Italian contact zone. Based on population genetic analyses of 15 highly polymorphic microsatellite loci and a mitochondrial marker, we show that the general genetic pattern matches well with the current taxon delimitation. Yet, single individuals with conflicting genetic identity suggest translocation of turtles by humans. In addition, we identify in south-western France and the vicinity of Rome populations being heavily impacted by introduced turtles. Cline analyses reveal that the major genetic break between E. o. galloit…