Meloro_etal_Paleobiology_Supplementary_R2

Meloro_etal_Paleobiology_Supplementary_R

Spatial variation in the UK otters’ diet.

Points represent 9 sampling locations for which diet composition was available, colours indicate genetic clusters. The first two axes of a Principal Component Analysis for percentage of seven prey categories (marine fish, freshwater fish, crustaceans, amphibians, reptiles, birds, mammals, and insects) are used to summarise variation between points. (DOCX)</p

Box plots of cranial size variation (= lnCS) in males and females from three genetic clusters.

Horizontal lines within each box indicate the median, upper and lower limits the inter-quartile range, while ‘whiskers’ indicate the minimum and the maximum.</p

Location of anatomical landmarks collected on 3D models of otter skulls.

Landmarks are defined as follows: 1 = Superior premaxilla; 2 = nasal suture; 3–10 = lacrimal; 4–9 = postorbital process 5–11; = zygomatic arch;6–8 = mastoid process; 7 = intersection of temporal line and sagittal crest; 12 = prosthion; 13–30 = premaxilla and nasal bone suture; 14–29 = canine alveoli; 15–28 = carnassial alveoli; 16–27 = carnassial alveoli; 17–26 = toothrow; 18–25 = palatine; 19–24 = pterygoid; 20–23 = glenoid cavity; 21–22 = occipital condyle.</p

Geographic origin of otter skulls.

Coloured points represent sampling locations. Sample size for each locality is reported in S1 Table. Country Boundaries was downloaded from www.data.gov.uk under the Open Government Licence v3.0.</p

Number of skull specimens analysed.

The sample is partitioned by sex for each geographic location. (DOCX)</p

Skull shape variation along the first two Principal Component axes (PCs) of Procrustes coordinates.

A. Colours indicate different genetic clusters, Scotland (green), Shetland (blue) and Wales (red). Individual data points represent the first two component scores from PCA carried out on all shape variables. B. A visualisation of the 3D contours related to extremes of variation along PC1, which describes 16.88% of the variance.</p

Thirty 3D landmarks.

(XLSX)</p

Definition of climatic variables used in the analyses.

Abbreviations: BIO = bioclimate. (DOCX)</p

Spatial variation in climate between the three genetic clusters.

Each point is a location along Principal Component scores (PC1 vs PC2) from a PCA on the six bioclimatic variables overlapped in a bi-plot. PC1 and PC2 are primarily influenced by Temperature Seasonality (BIO4) and Precipitation of Driest Month (BIO 14), respectively. (DOCX)</p