Fig. 1.

Map of a historical and b contemporary southern right whale winter habitat. The contemporary distribution is divided into large wintering aggregations (dark grey squares) and areas with sporadic sightings (coastal regions coloured white: see Supplementary Material 2 for references). Samples included in this study are from nursery grounds with bold acronyms: ARG (Argentina), SAF (South Africa), SWA (southwest Australia), and NZSA (New Zealand sub-Antarctic), but not from the BZL (Brazilian) and SCA (southcentral Australia) nursery grounds, also marked on the map. Also included are samples from the SEA nursery ground (southeast Australia, marked by open black square) and mainland New Zealand wintering habitat, which are a part of the sporadic sightings