Figure 2
Estimated change in sigma (σt) and persistence (pt = 3/βt) for humpback whales according to the best P-Model, which included sex differences in parameters controlling movement response to environmental covariates. Overlapping histograms, show speed distribution north (blue) and south (pink) of the 50°S (purple shows the overlap between areas by transparency). Panels a to c show these variables for mothers and panels d to f for males+. Colored lines denote the location of polar front (PF), Southern Antarctic Circumpolar Current Front (SACCF), and the southern boundary of the Antarctic circumpolar current (SBACCF). Antarctic circumpolar fronts data is made publicly available by the Australian Antarctic Data Centre (https://researchdata.edu.au). Data layers (including maps) were created in R ver. 4.0.2 (www.r-project.org) and ensembled in QGIS ver. 3.8.0 (www.qgis.org) for final rendering. Maps were created using data on bedrock topography from the National Centers for Environmental Information (https://maps.ngdc.noaa.gov/viewers/grid-extract/index.html). Grid-cells with values above 0 were considered land coverage and assigned a uniform color.
