Fig 1.
Map the studied populations of Notechis scutatus occidentalis and land-use of Perth, Western Australia.
Red points represent individual Western tiger snakes, and yellow points represent Eastern tiger snakes (Notechis scutatus scutatus). Grey shading represents the current distribution extent of the species (light = Western, dark = Eastern; modified from the IUCN Red List of Threatened Species [37]). Land-use was classified by the 2016 Australian Land Use and Management Classification (Australian Bureau of Agricultural and Resource Economics and Sciences, Canberra. CC BY 3.0.).
Table 1.
Pairwise values of population genomic differentiation (G″ST) of Notechis scutatus occidentalis around Perth, Western Australia.
Fig 2.
Multidimensional scaling plot of genetic distance between Notechis scutatus occidentalis individuals from Perth, Western Australia.
Each population has been given a unique icon. Axis one explained 15.1% and axis one explained 9.4% of the total variance.
Fig 3.
Admixture bar plot comparing population structure in Notechis scutatus occidentalis from Perth, Western Australia.
Each tick mark on the x-axis represents an individual snake, which are grouped by sampling locations. The dashed line represents the biogeographic barrier of the Swan/Canning rivers separating the northern and southern sampling localities. The y-axis represents the fraction of individuals’ genome that originates from a particular ancestral population, each of which has been given a unique colour.
Table 2.
Genetic diversity estimates of seven populations of Notechis scutatus occidentalis around Perth, Western Australia.
Fig 4.
Mean body condition of mainland Notechis scutatus occidentalis populations around Perth, Western Australia.
Body condition is presented as scaled mass index (SMI). gpc, grams per cm; filled diamonds are the population mean; error bars represent 95% confidence intervals; dashed line is mean SMI of 215.7 gpc at the mean population SVL of 757.1 mm; Ho is the mean observed heterozygosity for each population.
Table 3.
Effective population size (Ne) of seven populations of Notechis scutatus occidentalis around Perth, Western Australia.