Figure 1 in Acoustic documentation of temperate odontocetes in the Bering and Chukchi Seas

Figure 1. (A) Map of acoustic detections attributed to Risso's dolphins at sites M2, M5, and CH with dotted lines denoting historical range extents. (B) A spectrogram from 31 March 2010, at M2 zoomed into clicks attributed to Risso's dolphins because peaks and notches are centered near the expected frequencies reported in Soldevilla et al. (2008). Spectrogram settings are: window = Hanning, Nfft = 2,048, overlap = 99%, min dB = 10 dB, dB spread = 40 dB.