Figure 1
From: The genetic architecture of hybridisation between two lineages of greenshell mussels

Collection sites of P. canaliculus and hydrographic patterns around NZ. Opononi (OPO); Maunganui (MAU); Castlepoint (CAP); Westhaven (WEST); Fletchers Beach (FLE); Tasman Bay (TAS); Cape Campbell (CAM); Little Wanganui River (LWR); Kaikoura (KAI); Gore Bay (GOB); Timaru (TIM); Fiordland (FIO); Horseshoe Bay (HSB); Big Glory Bay (BGB). ●—northern lineage; ▴—southern lineage; …—areas inside the dashed lines on the east and west coasts contain the centres of the hybrid zone (but not necessarily the full spatial extent of the hybrid zone) and are also regions of pronounced seasonal coastal upwelling. Populations to the north and south of the dashed lines are the northern and southern lineage mussels, respectively; c, cultured mussels; WCC, Wairarapa Coastal Current; WE, Wairarapa Eddy. Reproduced from Wei et al. (2013a).