Peripheral populations are sometimes genetically and morphologically divergent from central populations and may have an evolutionary and ecological significance out of proportion to the percentage of the species they represent (Mayr 1982, Lesica and Allendorf 1995).
Sous-population 1 Sous-population 2 Dernière observation 1996 2004 2003 2003 2004 2003 2004 Observateur Penny Douglas et Smith Ennis Janszen Douglas et Smith Janszen Douglas et Smith Nombre d’individus / superficie occupée 20 / ? m² – 2004 recherche infructueuse Disparue 800 / 1 ha 22+ / 0,7 m2 28 / 8 m2 390 / 512 m2 800 / 440 m2