Fig. 3
From: Identification of predation events in wild fish using novel acoustic transmitters
Roaming index plots (left) and movement paths (right) of six apparently predated yellow perch in the Detroit River across May–November 2018. Roaming indices were calculated as the number of receivers that each tag was detected on per 2-h period as a proportion of the total number of receivers in the array; values of zero indicate periods with no detections. Centres of activity (COA) used to plot the movement paths were calculated using a 30-min timestep. Black dots in movement path plots represent the 21 stations deployed in the Detroit River (see Fig. 1). Red triangles indicate the release point of the tagged fish