Figure 3

(a) Currents surrounding New Zealand that are likely to have influenced scampi migration rates between scampi stocks. (b) Migration rates estimated from genetic data using divMigrate and compared with (c) particle migration between adjacent scampi stocks from hydrodynamic modelling. (a) The direction of two of New Zealand’s major ocean fronts are indicated on the map, the Tasman Front (TF) and the Sub-Tropical Front (STF). Other major currents include the East Auckland Current (EAUC), the Southland Current/Front (SC/SF), the Wairarapa Coastal Current (WCC), the East Cape Current (ECC) and Westland Current (WC). Semi-permanent eddies embedded in the flows are the Wairarapa Eddy (WE) and East Cape Eddy (ECE). The Otago shelf edge is outlined in orange. The ocean current information was adapted from Chiswell and Booth³⁴. (b) divMigrate relative migration rates between adjacent populations indicating higher rates of migration among SCI_1, SCI_2 and SCI_3, and between SCI_6A and SCI_7 (Table S8). The arrow direction points to which population is more likely to act as a sink among the adjacent SCIs. (c) The arrow direction indicates the resulting direction of particle movements from hydrodynamic particle modelling (Table S9). Indicated on the maps (b) and (c) are the sampling areas within each SCI (coloured square; Table S1), and the approximate full scampi range and fishery management areas²⁸.The figure's main elements, i.e., New Zealand and sample areas, were generated with ggplot2 v3.3.3¹¹⁴, mapdata v2.3.0¹¹⁵ and mapproj v1.2.7¹¹⁶. Other aesthetic elements were added using Corel Draw Essentials X5 (v15.2.0.686).