Article
The herring gull complex is not a ring species.
Proceedings. Biological sciences - 7 May 2004
Liebers Dorit, de Knijff Peter, Helbig Andreas J
Abstract excerpt
Under what circumstances speciation in sexually reproducing animals can occur without geographical disjunction is still controversial. According to the ring-species model, a reproductive barrier may arise through 'isolation by distance' when peripheral populations of a species meet after expanding around some uninhabitable barrier. The classical example of this kind of speciation is the herring gull (Larus...
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