Figure 4
Swordfish movement behavior state Hidden Markov Model results. (a) The diffusion kernels fit for State 1 (‘transit’; left) and State 2 (‘lingering’; right) for each fish, with histograms of the probability of State 2 assignment at each 12-h time step. For reference, the extent of State diffusion kernel grid images is 2.75°. (b) Most-likely latitudes of each swordfish by day of year at 12-h intervals, by estimated behavior state. Open circles indicate estimated transit behavior at a given time point (i.e., probability of assignment to State 2 < 0.5), while closed circles represent lingering behavior (prob. State 2 assignment ≥ 0.5). Note that PSAT deployments across multiple years are depicted. Bottom: Expected residency distributions for behavior States 1, transit (c) and 2, lingering (d). Darker shaded area represents core distribution (50th percentile) contour and lighter shaded area 95th percentile contour.
