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. 2017 Aug 8;20(6):1067–1079. doi: 10.1007/s10071-017-1123-5

Fig. 2.

Fig. 2

Playback experimental setup, showing the position of the videographer (sitting on top of the ladder on the boat), the playback speaker (held by the person at the foot of the ladder wearing a blue hat), and the target dolphin with a suction cup hydrophone on its melon. Photograph courtesy of Jim Schulz, Chicago Zoological Society, taken under National Marine Fisheries Service Scientific Research Permit No. 522-1785