Fig. 4

Examples of individual movement tracks from acoustic detections of tagged Common Snook (fish ID number noted in each panel) showing downstream migrations during the spawning season. Solid blue lines show the measured water level at Bottle Creek in the upper river for each year. Horizontal black lines at river km 23 and 15 delineate zones boundaries between the upper river (> 23 river km), Tarpon Bay (15–23 river km), and the lower river (< 15 river km, per Fig. 1), and vertical hashed lines mark the beginning and end of the spawning season (April 1-Nov 15)