Fig. 1From: Performance of a high-frequency (180 kHz) acoustic array for tracking juvenile Pacific salmon in the coastal oceanDouble tagging steelhead. a VEMCO V9-1H (69 kHz; larger tag) and V4-1H (180 kHz) acoustic transmitters being b implanted interperitoneally into a summer steelhead (Oncorhynchus mykiss) smolt. One of each tag type was surgically implanted into each of 50 smoltsBack to article page