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Biology Articles » Biomathematics » Genetic variation in the invasive avian parasite, Philornis downsi (Diptera, Muscidae) on the Galápagos archipelago » Figures
Figures
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Figure 1
Map of Santa Cruz, Floreana, and Isabela Islands with sampling locations.
Sampling sites on Santa Cruz: S1 = highlands; S2 = lowlands, Punta
Estrada; S3 = lowlands, Garrapatero; S4 = lowlands, Itabaca. On
Floreana and Isabela, one site each in the lowlands (L) and highlands
(H) are indicated. (Click image to enlarge) |
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Figure 2
Distribution of allele frequencies indicating a mode-shift.
Bars represent the proportion of alleles found in each allele frequency
class. Deviation from an L-shaped distribution is indicative of a
mode-shift in allele frequency due to a recent genetic bottleneck. (Click image to enlarge) |
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Figure 3
Estimated number of populations from STRUCTURE (a) and GENELAND (b) analyses. (a) Mean ( ± SD) probabilities of the data (LnPr [X|k]) over three replicate STRUCTURE runs plotted as a function of the putative number of clusters (k); (b) Posterior density distribution of the number of clusters estimated from GENELAND analysis in three replicates. (Click image to enlarge) |
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Figure 4
Genetic assignment of P. downsi individuals across three islands using Bayesian clustering analysis.
Two genetic clusters are identified: (a) including all individuals from
Santa Cruz (n = 62) (bottom left) and Isabela (n = 9) (centre top), and
(b) all individuals from Floreana Island (n = 76) (bottom right). Black
dots represent independent geographic sampling points (i.e. location of
bird nests). Note that two geographic sampling points on Isabela Island
were within 5 m of each other and are not distinguishable. (Click image to enlarge) |
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